High-density bimodal polyethylene with increased resistance to cracking under influence of surrounding medium for blow moulding

FIELD: chemistry.

SUBSTANCE: composition contains at least one high-molecular polyethylene and at least one low-molecular polyethylene component. The high-molecular polyethylene component of the composition has molecular weight distribution of approximately 6 to 9, content of short-chain branches less than approximately 2 branches per 1000 carbon atoms of the main chain and Mz - approximately 1100000 or greater. The ratio of weight-average molecular weight of the high-molecular polyethylene component to the weight-average molecular weight of the low-molecular polyethylene component is less than 20. The disclosed composition has density greater than 0.94 g/cm3, resistance to cracking under the influence of the surrounding medium greater than 600 hours and percentage swelling greater than 70%.

EFFECT: improved mechanical strength characteristics, suitable for blow moulding.

22 cl, 1 tbl, 16 ex

 

The technical field to which the invention relates

The present invention and its variants refer to compositions containing polyethylene, in particular to compositions of high-density polyethylene, which are preferably bimodal polyethylene compositions.

Background of invention

Ongoing research is aimed at obtaining compositions, molded blown, in particular for bottles. The aim is the composition obtained economically and efficiently, and also the composition with the proper balance of properties, such as strength, stiffness, and good processing AIDS.

Molded blown composition of high density polyethylene usually have a poor durability to cracking under the influence of the environment (SROS)(ESCR)). SERVOS is a measure of mechanical destruction. Accordingly, the composition of high density polyethylene are not used for forming blown, especially bottles, where desired or required high resistance to cracking, i.e. high SERVOS. However, the composition of high density polyethylene are preferred for obtaining the desired mechanical properties, such as rigidity of the bottle.

There is therefore a need in the compositions of high-density polyethylene, which is s have a good SERVOS, as well as good characteristics of mechanical strength, suitable for blow molding, including bottles.

Brief description of the invention

Offers bimodal polyethylene compositions and blow molded bottle made of them. In one embodiment, the composition includes at least one high molecular weight polyethylene component having a molecular mass distribution(MMD)(MWD)of from about 6 to about 9, the content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain and a Mz of about 1100000 or more. The composition also includes at least one low molecular weight polyethylene component, where the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 20 or less. The composition has a density of about 0,94 g/cm3or more, SERVOS approximately 600 hours or more and the percentage of extrudate swell of about 70% or more.

In another separate embodiment, the bimodal polyethylene includes at least one high molecular weight polyethylene component having a molecular mass distribution(MMD)(MWD)of from about 6 to about 9, Mz of about 1100000 or more and Mz+1 of about 2000000 or more, and m is Nisha least one low molecular weight polyethylene component, having a molecular weight of 50,000 or less. The composition has a density of about 0,94 g/cm3or more, SERVOS approximately 600 hours or more and the percentage of extrudate swell of about 70% or more.

It is also proposed extruded bottle of bimodal polyethylene composition. In one embodiment, the bottle includes a bimodal polyethylene composition having at least one high molecular weight polyethylene component having a molecular mass distribution(MMD) (MWD)of from about 6 to about 9 and the content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain. Bimodal polyethylene composition also includes at least one low molecular weight component. High molecular weight polyethylene component is present in an amount of about 50 wt.% or less by weight of the composition. The composition has a density of about 0,94 g/cm3or more, SERVOS approximately 600 hours or more and the percentage of extrudate swell of about 70% or more. Bottle blow molded so that it has a wall thickness of from about 0.01 inch to about 0.03 inch and a weight of at least 70,

Detailed description of the invention

Offers a bimodal composition of high density polyethylene (HDPE), with a surprising combination of excellent properties of RA is bohane extrudate and resistance to cracking under the influence of the environment (SROS)(ESCR)). Bimodal polyethylene composition suitable for forming a blown bottle having an average thickness from about 0.01 inches to about 0.03 inches, a weight of about 70 g or more, SERVOS approximately 600 hours or more and a die swell of about 70% or more.

Bimodal polyethylene composition can include at least one high molecular weight polyethylene component(CMC)(HMWC)and at least one low molecular weight polyethylene component(NMC)(LMWC)). I believe that the broad MMD and characterization of co monomer CMC provide a bimodal polyethylene composition capable of giving a bimodal blow molded product with improved SERVOS and commercially preferred die swell. Preferably, the die swell is more than about 70% and more preferably more than 75%.

The term "bimodal" refers to a polymer or polymer composition, such as polyethylene, having a "bimodal molecular weight distribution". The term "bimodal" and "bimodal molecular weight distribution" have a very broad definition which can give the specialists in this field of technology these terms, as reflected in one or more printed publications or issued patents, such as, for example, U.S. patent No. 6579922. "Bimodal" composition m which can include polyethylene component with at least one identifiable high molecular weight and a polyethylene component with at least one identifiable low molecular weight, for example, two different peaks on VEH (SEC) curve. Material with more than two different peaks of the molecular mass distribution will be considered a "bimodal"how to use this term, although the material may also be known as "multimodal composition, for example a tri-modal or even thermodyna etc. composition.

The term "polyethylene" means a polymer made from at least 50% teleprovodnik units, preferably at least 70% teleprovodnik units, more preferably at least 80% teleprovodnik links, or 90% teleprovodnik links, or 95% teleprovodnik links, or even 100% teleprovodnik links. The polyethylene, thus, can be homopolymer or copolymer, including terpolymer with other monomer units. The polyethylene described herein may, for example, include at least one or more other olefin (olefin) and/or comonomer (comonomers). The olefins may contain, for example, from 3 to 16 carbon atoms in one embodiment, from 3 to 12 carbon atoms in another embodiment, from 4 to 10 carbon atoms, in another embodiment, and from 4 to 8 carbon atoms, in another embodiment. Typical comonomers include, but are not limited to, propylene, 1-butene, 1-penten, 1-hexene, 1-hepten, 1-octene, 4-methylpent-1-ene, 1-mission 1-dodecene, 1-hexed the prices etc. Also used are unsaturated comonomers, such as 1,3-hexadiene, 1,4-hexadiene, cyclopentadiene, Dicyclopentadiene, 4-vinyl-cyclohex-1-ene, 1, 5cyclooctadiene, 5-vinylidene-2-norbornene and 5-vinyl-2-norbornene. Other options may include ethacrylate or methacrylate.

The term "high molecular weight polyethylene component" refers to a polyethylene component in the bimodal composition, which has a higher molecular weight than the molecular weight of at least one other polyethylene component in the same composition. Preferably the polyethylene component has an identifiable peak. When the composition includes more than two components, for example a tri-modal composition, then the high molecular weight component should be defined as the component with the highest srednevekovoi molecular weight.

In one or more variants of the high-molecular component is a component that forms part of the bimodal composition, which has srednevekovoy molecular weight (Mw) of 300,000 to 800000. In one or more options srednevekovaja molecular weight of high molecular weight polyethylene component may be in the range from a low of about 200000, or 250000, or 300000, or 350000, or 375000, up high, 400000, or 500000, or 600000, or 700000, or 800000.

The term "low molecular weight is polietilenovoy component" refers to a polyethylene component in the bimodal composition, which has a lower molecular weight than the molecular weight of at least one other polyethylene component in the same composition. Preferably the polyethylene component has an identifiable peak. When the composition includes more than two components, for example a tri-modal composition, then the low molecular weight component should be defined as the component with the lowest srednevekovoi molecular weight.

In some embodiments, a low molecular weight component is a component that forms part of the bimodal composition, which has srednevekovoy molecular weight (Mw) from 5,000 to 45,000. In various individual cases srednevekovaja molecular weight low molecular weight polyethylene component may be in the range from a low of about 3000, or 5000, or 8000, or 10000, or 12000 or 15000, to a high of about 100000, or 80000 or 70000 or 60000 or 50000 or 45000.

Srednekislye (Mn), srednevekovaja (Mw), z-average (Mz) and (z+1)-average (Mz+1) mass are terms that refer to the values of the molecular weight of the entire composition (for example, a mixed composition) in contrast to the molecular weight of any single component, unless otherwise noted. Values srednekamennogo, srednevekovoi, z-average and (z+1)-average molecular weight of cover to any value, as defined I the m published method. For example, srednevekovaja molecular weight (Mw) can be measured or calculated in accordance with the methodology described in ASTM D3536-91 (1991) and ASTM D5296-92 (1992).

Srednekislye, srednevekovaja, z-average and (z+1)-average molecular weight specific plastic component, for example high molecular weight polyethylene component and a low molecular weight polyethylene component, can be determined using any published method. The preferred method uses any published technique of deconvolution, for example any published technique explanations molecular information on each polymer component in the bimodal polymer. Particularly preferred technique uses a deconvolution Flory, including (but not limited to) methods Flory presented in U.S. patent No. 6534604 described here by reference in its entirety. Used is any program that introduces the principles contained in the following link: P.J. Flory. Principles of Polymer Chemistry. Cornell University Press, New York, 1953. Used is any computer program that is able to reconcile the experimental molecular mass distribution with multiple Flory or logarithmic statistical distributions. Flory distribution can be expressed as follows:

Y=A0 (M/Mn)2e(M/Mn)

In this equation Y is the mass fraction of polymer, corresponding to molecular particles M, Mn is srednekamennogo molecular weight distribution, and a0represents the mass fraction sieve, forming a distribution. Y can be shown proportional to the differential molecular weight distribution ((DMMR) (DMWD)), which is the change of concentration with the change in the logarithm of molecular weight. WAH-chromatogram represents DMR. Preferred is any computer program that minimizes the squared difference between the experimental and calculated distributions at variation And0and Mn for each Flory distribution. Especially preferred is any program that can handle up to 8 Flory-distributions. To implement the minimization can be used a commercially available program called Excel Solver offered by the company Frontline Systems, Inc. on www.solver.com. When using this program, special restrictions may be placed on a separate Flory distribution, which allows for the consistent performance of the experimental mixtures and bimodal distributions.

A bimodal distribution can be consistent with two separate groups of four ogran the Chennai Flory-distributions for all eight distributions. One limited group will agree a low molecular weight component, whereas the other group will coordinate high-molecular component. Each restricted group is characterized As0and Mn component with the lowest molecular weight in the group and the relations A0(n)/A0(1) and Mn (n)/Mn (1) for each of the other three distributions (n=2, 3, 4). Although the total number of degrees of freedom is the same for limited review for eight unlimited Flory-distributions, the presence of constraints required for a more accurate determination of the contribution to the overall chromatogram separate low molecular weight component and high molecular weight component in the bimodal polymer. Once completed the reconciliation process, the program then calculates the statistics of the molecular mass and the mass percent separate high and low molecular weight components.

The term "MMP" ("MWD") (molecular weight distribution) means the same thing as the term "PDI" ("TTD") (polydispersity). The term "MMP" (TTD) is intended to have the broad definition which can give the specialists in this field of technology this term, as reflected in one or more printed publications or issued patents. DFID (TTD) is the ratio srednevekovoi molecular weight (Mw) to redneckin the th molecular weight (Mn), ie Mw/Mn.

Preferably at least one high molecular weight polyethylene component (CMC) (HMWC) DFID has in the interval from low, approximately 6,0, up high, about to 9.0. In one or more variants of CMC has DFID is from about 6.5 to about 8.5. In one or more variants of CMC has DFID is from about 6.5 to about 8.0 in. Preferably CMC has MMD from about 6.6 to about 8,2.

In one or more options NMC (LMWC) (low molecular weight component) has DFID is in the range from a low of about 3,0, to a high of about 5,0. In one or more options NMC has MMD from about 3.5 to about 4.5. In one or more options NMC has MMD from about 3.7 to about 4.2. Preferably NMC has MMD from about 3.7 to about 4.0.

In one or more variants of the bimodal polyethylene composition has a DFID is in the range from a low of about 9, 10, or 15, to a high of about 20, 25 or 30. In one or more variants of the bimodal polyethylene composition has a MMD from about 10 to about 22. In one or more variants of the bimodal polyethylene composition has a MMD from about 10 to about 20. Preferably bimodal polyethylene composition has a MMD from about 13 to about 18.

Characteristics of the co monomer can be determined by the "content of short-chain branching". The term "content korotkie echnik branching" refers to the number of branches on the polymer, having less than 8 carbon atoms per 1000 carbon atoms of the main chain and measured using the13NMR. In one or more variants of CMC is the content of short-chain branching of less than about 5 branches per 1000 carbon atoms of the main chain. In one or more variants of CMC is the content of short-chain branching of less than about 4 branches per 1000 carbon atoms of the main chain. In one or more variants of CMC is the content of short-chain branching is less than approximately 3 branches per 1000 carbon atoms of the main chain. In one or more variants of CMC is the content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain.

Preferably CMC has the content of short-chain branching of from about 0.01 branches per 1000 carbon atoms in the polymer main chain to about a 5.0. In one or more variants of CMC is the content of short-chain branching of from about 0.5 branches per 1000 carbon atoms in the polymer main chain of up to about 4.0. In one or more variants of CMC is the content of short-chain branching of from about 1.0 branches per 1000 carbon atoms in the polymer main chain to about a 3.0. In one or more variants of CMC is the content of short-chain branching from the ome 1.5 branches per 1000 carbon atoms of the main chain to approximately 2. NMC may be less than 0.1 branches per 1000 carbon atoms.

It is assumed that the characteristics of the co monomer CMC provides a z-average molecular weight (Mz) and (z+1)-average molecular weight (Mz+1), which provides an unexpected balance between mechanical strength, die swell, SERVOS. Preferably CMC has a z-average molecular weight (Mz) of about 1100000 Yes or more. In one or more variants of CMC has a z-average molecular weight (Mz) of about 1300000 Yes or more. In one or more variants of CMC has a z-average molecular weight (Mz) of about 1400000 Yes or more. In one or more variants of CMC has a z-average molecular weight (Mz) of about 1100000 Yes to about 2000000 Yes. In one or more variants of CMC has a z-average molecular weight (Mz) of about 1300000 Yes to about 1900000 Yes. In one or more variants of CMC has a z-average molecular weight (Mz), which ranges from a low of about 1100000, or 1200000, or 1300000, or 1400000 Yes, to a high of about 1600000, or 1700000, or 1800000, or 1900000 Yes.

In one or more variants of CMC is (z+1)-average molecular weight (Mz+1) of about 2000000 Yes or more. In one or more variants of CMC is (z+1)-average molecular weight (Mz+1) of approximately £ 2,800,000 are exempted Yes or more. In one or more variants of CMC is (z+1)-average molecular weight (Mz+1) about 3400000 Yes or more. In od the ohms or more options CMC has (z+1)-average molecular weight (Mz+1) from about 2000000 Yes to about 3500000 Yes. In one or more variants of CMC is (z+1)-average molecular weight (Mz+1) from about to 2 700 000 Da to about 3500000 Yes. In one or more variants of CMC is (z+1)-average molecular weight (Mz+1), which ranges from a low of about 2000000, or 2500000, or 3000000 Yes, to a high of about 3300000, or 3400000, or 3500000 Yes.

The term "scope" refers to the ratio srednevekovoi molecular weight high molecular weight component, sometimes referred to as MwCMCto srednevekovoi molecular weight low molecular weight component, sometimes referred to as MwNMC. Swipe therefore can also be expressed as the ratio MwCMC:MwNMC. Srednevekovaja molecular mass of each component can be obtained by deconvolution of the total VEH(SEC)curve, i.e. WAH-curve of the entire composition, as discussed above.

In one or more variants of the bimodal polyethylene composition has a range of less than about 20, preferably less than about 15 or 14 or 13 or 12 or 11 or 10. In one or more options "scope" bimodal polyethylene composition is in the range from a low of about 5 or 6, or 7 to about 13, or 14, or 15. In one or more options "scope" bimodal polyethylene composition is in the range from a low of about 12 to a high of about 15.

The term "slice" of relations is seeking to the content in mass percent (wt.%) high molecular weight polyethylene component in the bimodal composition. Thus, he describes the relative amount of high molecular weight polyethylene component relative to the low molecular weight polyethylene component in the bimodal polyethylene composition, including any of the polymer compositions described herein. Content wt.% each component can also be determined by the area of the curve of each molecular mass distribution, which is observed after deconvolution of the curve the total molecular mass distribution.

In one or more options "slice" of a bimodal polyethylene composition is in the range from low, about 30%, or 35%, or 40%, to a high of about 50%, or 55%, or 60%. In one or more options "slice" of a bimodal polyethylene composition is about 40-60%. In one or more options "slice" of a bimodal polyethylene composition is about 45-55%.

Density is a physical property of the composition and can be determined in accordance with ASTM-D 792. Density can be expressed in grams per cubic centimeter (g/cm3), unless otherwise noted. With the exception of the interval, which is determined by the actual density, the term "high density" means any density 0,940 g/cm3or higher, alternative 0,945 g/cm3or higher, alternative 0,950 g/cm3or higher, and the viola is rnative 0,960 g/cm 3or higher. Illustrative interval compositions of high density is 0,945 g/cm3to 0,967 g/cm3.

In one or more variants of CMC has a density in the range from low, 0,920 g/gmol, 0,925 g/gmol or 0.930 g/gmol, to high 0.935 g/gmol, 0,940 g/gmol or 0,945 g/gmol. In one or more variants of CMC has a density of from 0.930 g/gmol to 0,936 g/gmol. In one or more variants of CMC has a density of from 0,932 g/gmol to 0,940 g/gmol. Preferably CMC has a density 0,932-0,936 g/gmol.

In one or more options NMC has a density in the range from low, 0,950 g/gmol, 0,955 g/gmol or 0,960 g/gmol, to high 0,970 g/gmol, 0,980 g/gmol or 0,980 g/gmol. In one or more options NMC has a density of from 0,960 g/gmol to 0,975 g/gmol. In one or more options NMC has a density of from 0,965 g/gmol to 0,975 g/gmol. Preferably NMC has a density 0,965-0,970 g/gmol.

In one or more variants of the bimodal polyethylene composition has a density in the range from low, 0,920 g/gmol, 0.930 g/gmol or 0,950 g/gmol, to high 0,950 g/gmol, 0,960 g/gmol or 0,970 g/gmol. In one or more variants of the bimodal polyethylene composition has a density from 0,945 g/gmol to 0,965 g/gmol. In one or more variants of the bimodal polyethylene composition has a density from 0,948 g/gmol to 0,960 g/gmol. Preferably bimodal polyethylene is the first composition has a density 0,948-0,958 g/gmol.

The term “MFR (I21/I2)”as used here means the ratio of I21(also known as flow index, or “FI”) I2(also known as melt index, or “MI”). As FI (I21), and MI (I2) are determined in accordance with ASTM-1238, condition E, at 190°C.

In one or more options NMC has a MFR in the range from low, about 10, 15 or 20, up high, about 30, 40 or 50. In one or more options NMC has a MFR of about 10-35. In one or more options NMC has a MFR of about 15-25. Preferably NMC has a MFR of about 16-23.

In one or more variants of the bimodal polyethylene composition has an MFR in the range from low, about 50, 60 or 70, to a high of about 100, 120 or 150. In one or more variants of the bimodal polyethylene composition has a MFR from about 50 to about 135. In one or more variants of the bimodal polyethylene composition has a MFR from about 60 to about 120. Preferably bimodal polyethylene composition has a MFR of about 67-119.

In one or more variants of CMC has FI in the interval from a low of about 0.1 g/10 min, or 0.2 g/10 min, or 0.3 g/10 min to a high of about 1.0 g/10 min, 2.0 g/10 min or 3.0 g/10 min. In one or more variants of CMC has FI about 0.35 to 2.0 g/10 min. In one or more variants of CMC has FI about 0.35 to 1.5 g/10 min, Preferably CMC had the t FI about a 0.36-1.2 g/10 minutes

In one or more options NMC has FI in the interval from a low of about 800 g/10 min, or 900 g/10 min to 1000 g/10 min, up high, about 1500 g/10 min, 2000 g/10 min or 4000 g/10 min. In one or more options NMC has FI about 800-3800 g/10 min. In one or more options NMC has FI about 900-3725 g/10 min, Preferably NMC has FI about 925-3725 g/10 minutes

In one or more variants of the bimodal polyethylene composition has an FI of at least about 5 g/10 min. In one or more variants of the bimodal polyethylene composition has an FI of less than about 40 g/10 minutes In one or more variants of the bimodal polyethylene composition has FI in the interval from a low of about 5 g/10 min to 15 g/10 min or 30 g/10 min to a high of about 40 g/10 min to 50 g/10 min or 60 g/10 min, Preferably bimodal polyethylene composition has an FI of about 5-40 g/10 minutes

In one or more options NMC has an MI in the range from a low of about 40 g/10 min to 50 g/10 min or 60 g/10 min to a high of about 150 g/10 min, 170 g/10 min or 200 g/10 min. In one or more options NMC has MŁ about 40-185 g/10 min. In one or more options NMC has MŁ about 55-185 g/10 min, Preferably NMC has a MI of about 55-100 g/10 minutes

In one or more variants of the bimodal polyethylene composition has an MI in the range from a low of about 0.01 g/10 min, 0.03 g/10 min or 0.05 g/10 min,up high, about 1.0 g/10 min, 1.5 g/10 min or 2 g/10 min. In one or more variants of the bimodal polyethylene composition has a MI of about 0.05 to 1.2 g/10 minutes In one or more variants of the bimodal polyethylene composition has a MI of about 0.07 to 1.2 g/10 min, Preferably bimodal polyethylene composition has a MI of about 0.07 to 1.0 g/10 minutes

Some variants of such compositions described in more detail below.

In at least one single case of bimodal composition of high density polyethylene contains at least one high molecular weight polyethylene component having a molecular mass distribution(MMD) (MWD)of from about 6 to about 9, the content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain and a Mz of about 1100000 or more. The composition also contains at least one low molecular weight polyethylene component, where the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 20 or less. The composition has a density of about 0,94 g/cm3or more, SERVOS (ESCR) approximately 600 hours or more and the percentage of extrudate swell of about 70% or more.

In at least one other Varian is e bimodal polyethylene composition contains at least one high molecular weight polyethylene component, having a molecular mass distribution(MMD) (MWD)of from about 6 to about 9, Mz of about 1100000 or more and Mz+1 of about 2000000 or more, and at least one low molecular weight polyethylene component having a molecular weight of 50,000 or less. The composition has a density of about 0,94 g/cm3or more, SERVOS (ESCR) approximately 600 hours or more and the percentage of extrudate swell of about 70% or more.

In one or more of the options listed above or below, high molecular weight polyethylene component has a Mz+1 of about 2000000 or more.

In one or more of the options listed above or below, high molecular weight polyethylene component has a content of co monomer of about 0.3 to 1 mol.%.

In one or more of the options listed above or below, the composition has a density of about 0.96 g/cm3or more.

In one or more of the options listed above or below, high molecular weight polyethylene component is present in an amount of about 60 wt.% or less relative to the weight of the composition.

In one or more of the options listed above or below, high molecular weight polyethylene component is present in an amount of about 50 wt.% or less relative to the weight of the composition.

In one or more of the options listed above or below, high molecular weight polyethylene component is present in the Alceste about 40 wt.% or less relative to the weight of the composition.

In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 15 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 14 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 13 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 12 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component sostavleniem 11 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 10 or less.

In one or more of the options listed above or below, high molecular weight polyethylene component has a content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain. In one or more of the options listed above or below, high molecular weight polyethylene component has a content of short-chain branching is less than approximately 1.0-2.0 branches per 1000 carbon atoms of the main chain.

In one or more of the options listed above or below, SERVOS composition is 700 hours or more. In one or more of the options listed above or below, SERVOS composition is 800 hours or more. In one or more of the options listed above or below, SERVOS composition is 900 hours or more. In one or more of the options listed above or below, SERVOS composition is 1000 hours or more.

In one or more of the options listed above or below, the percentage of extrudate swell of approximately 60% or more. In one or more of the options listed above or below, the percentage swelling of the extrudate is about 65% or more. In one or more of the options listed above or below, the percentage of extrudate swell of approximately 70% or more. In one or more of the options listed above or below, the percentage of extrudate swell of approximately 75% or more. In one or more of the options listed above or below, the percentage of extrudate swell of approximately 80% or more.

In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of about 100,000 or less. In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of 50,000 or less. In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of about 45000 or less. In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of about 40,000 or less.

Also features a bottle, extruded from a bimodal polyethylene composition. In at least one separate embodiment, the bottle includes a bimodal polyethylene composition having at least one high molecular weight polyethylene component having a molecular mass distribution(MMD) (MWD)of from about 6 to about 9 retained the e short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain. Bimodal polyethylene composition also includes at least one low molecular weight component. High molecular weight polyethylene component is present in an amount of about 50 wt.% or less by weight of the composition. The composition has a density of about 0,94 g/cm3or more, SERVOS approximately 600 hours or more and the percentage of extrudate swell of about 70% or more. Bottle blow molded so that it has a wall thickness of approximately 0,254-0,762 mm (0.01-0.03 inches) and weighs at least 70,

In one or more of the options listed above or below, high molecular weight polyethylene component has a Mz+1 of about 2000000 or more.

In one or more of the options listed above or below, the content of short-chain branching is approximately 1.0-2.0 branches per 1000 carbon atoms of the main chain.

In one or more of the options listed above or below, high molecular weight polyethylene component has a content of co monomer of about 0.3 to 1 mol.%.

In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of about 100,000 or less. In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of 50,000 or less. In one or more of the options listed above or below, the low molecularly polyethylene component has a molecular weight of about 45000 or less. In one or more of the options listed above or below, low molecular weight polyethylene component has a molecular weight of about 40,000 or less.

In one or more of the options listed above or below, high molecular weight polyethylene component is present in an amount of about 60 wt.% or less relative to the weight of the composition. In one or more of the options listed above or below, high molecular weight polyethylene component is present in an amount of about 50 wt.% or less relative to the weight of the composition. In one or more of the options listed above or below, high molecular weight polyethylene component is present in an amount of about 40 wt.% or less relative to the weight of the composition.

In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 20 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 19 or less. In one or more of the options listed above or below, the ratio srednevekovoi mole is Blarney high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 18 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 17 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 16 or less. In one or more of the options listed above or below, the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is 15 or less.

In one or more of the options listed above or below, the wall thickness is approximately 0,432-0.66 mm (0,017 was 0.026 inch).

In one or more of the options listed above or below, the weight of the bottle is 75 grams or more. In one or more of the options listed above or below, the weight of the bottle is 80 g or more.

In one or more of the options listed above or below, SERVOS composition is 700 hours or more. In one or more of the options listed above or below, SERVOS composition is 800 hours or more. In one or more of the options pointed to by the x above or below, SERVOS composition is 900 hours or more. In one or more of the options listed above or below, SERVOS composition is 1000 hours or more.

In one or more of the options listed above and hereinafter, the percent swell of the extrudate is about 60% or more, about 70% or more, about 75% or more, about 80% or more.

Methods of polymerization

The method of polymerization used for the formation of any polymer components may be implemented using any suitable way. Illustrative methods include (but not limited to) methods of high pressure, solution, slurry and gas-phase methods. Preferably any one or more plastic components are polymerized continuous gas-phase method using a reactor with a fluidized bed. A reactor with a fluidized bed can include a reaction zone and a so-called zone speed reduction. The reaction zone may include a layer of growing polymer particles, formed polymer particles and a minor amount of catalyst particles fluidized by the continuous flow of the gaseous monomer and diluent with the heat of polymerization through the reaction zone. Optional part of the recycled gas can be cooled and compressed by the compressor with the formation fluid that is elicium heat capacity of the circulating gas flow when re-entering the reaction zone. Matching the velocity of the gas flow can easily be determined by simple experiment. Replenishment of the circulating gas stream by the monomer occurs at a rate equal to the rate at which the dispersed polymer product and the monomer associated with it, are removed from the reactor, and the composition of the gas passing through the reactor is adjusted to maintain essentially in a steady state gaseous composition within the reaction zone. The gas discharged from the reaction zone is passed into a zone of lower velocity, where the captured particles are removed. The smaller the captured particles and dust can be removed in a cyclone and/or filter. The gas is passed through the heat exchanger, where heat is given polymerization, is compressed in the compressor and then return to the reaction zone. Additional details of the reactor and method of operation of the reactor is described, for example, in US 3709853, US 4003712, US 4011382, US 4302566, US 4543399, US 4882400, US 5352749, US 5541270, EP-A-0802202 and Belgian patent No. 839380.

The temperature of the reactor fluidized bed here is preferably in the range from 30°C or 40°C or 50°C to 90°C or 100°C or 110°C, or 120°C, or 150°C. in General, the reactor operates at the highest temperature, which is possible, taking into account the sintering temperature of the polymer product in the reactor. Regardless of the method used to obtain polyolefin the s of the present invention, the temperature of polymerization, or the reaction temperature should be below the melting temperature, or "sintering", formed by the polymer. Thus, the upper temperature limit in one embodiment, is the melting point of the polyolefin obtained in the reactor.

Hydrogen gas is often used in the polymerization of olefins to control the final properties of the polyolefin as described in the Handbook of Polypropylene Handbook 76-78 (Hanser Publishers, 1996). The use of certain catalytic systems, the increase in the concentration (partial pressure) of hydrogen can increase the rate of melt flow (MFR) (also referred to here as the melt index (IL) (MI)) formed of polyolefin. Thus, MFR, or IL (MI), may influence the concentration of hydrogen. The amount of hydrogen in the polymerization can be expressed as a molar ratio relative to the total amount of polymerizable monomer, such as ethylene or mixtures of ethylene and hexene or propylene. The amount of hydrogen used in the polymerization method of the present invention, represents the amount needed to achieve the desired MFR, or IL (MI), final polyolefin resin. In one embodiment, the molar ratio of hydrogen:the total monomer (H2:monomer) is in the range from more than 0.0001 in one embodiment, and from more than 0,0005 in another embodiment, and from Bo is her 0,01 in still another embodiment, and less than 10 in yet another embodiment, and less than 5 in yet another embodiment, and less than 3 in yet another embodiment, and less than 0,10 in still another embodiment, where the desired interval may include any combination of any upper limit of the molar ratio with any lower limit of the molar ratio described here. Expressed in any way the amount of hydrogen in the reactor at any time may be in the range of up to 5000 hours/million, and up to 4000 hours/million in another embodiment, and up to 3000 hours/million in yet another embodiment, and from 50 to 5000 hours/million in yet another embodiment, and from 500 to 2000 hours/million different version.

The pressure in one or more reactors in gas-phase method (either in one stage or in two or more stages) may be in the range of 100 psi (690 kPa) to 500 psig (3448 kPa), and in the range of from 200 psig (1379 kPa) to 400 psig (2759 kPa) in another embodiment, in the range of from 250 psi (1724 kPa) to 350 psig (2414 kPa) in still another variant.

Gas-phase reactor is capable of producing from 500 lbs of polymer per hour (227 kg/HR) up to 200,000 lb/h (90900 kg/h), and more than 1000 lbs/HR (455 kg/HR) in another embodiment, and more than 10,000 lbs/HR (4540 kg/HR) in yet another embodiment, and more than 25,000 lb/h (11300 kg/HR) in yet another embodiment, and more than 35,000 lbs/HR (15900 kg/HR) in yet another embodiment, and more than 50,000 lb/h (22700 kg/HR) in yet another embodiment, and from 65000 lb/h (29000 kg/h) up to 100,000 lb/h (45500 kg/HR) in yet another, is the version.

In addition, commonly used multistage reactor using two or more reactors arranged in series, where one reactor can provide, for example, high-molecular component, and the other reactor can give low molecular weight component. In one or more variants of the polyolefin can be obtained by using multi-stage gas-phase reactor. Such industrial polymerization system is described, for example, 2 Metallocene-Based Polyolefins 366-378 (John Scheirs &W. Kaminsky, eds. John Wiley & Sons, Ltd. 2000), US 5665818, US 5677375, US 6472484, EP 0517868 and EP-A-0794200.

A method of obtaining a bimodal composition

Different types of methods and configurations of reactors can be used to obtain a bimodal polyethylene composition, including mixing in the melt, the number of reactors (i.e. serially arranged reactors) and a single reactor using a mixed catalyst system. Bimodal composition, for example, may be a reactor blend (also sometimes called chemical mixture). The reaction mixture is a mixture that is formed (polymerized) in a single reactor, for example, using a mixed catalyst system. Bimodal composition also can be a physical mixture, for example a composition formed postpolymerization mixing elismeresem together two or more polymer components, i.e. at least one Department and at least one NMC, where each of the polymeric component is polymerized using the same or different catalytic systems.

The catalytic system

The term "catalyst system" includes at least one catalyst component and at least one activator, the alternative at least one socializaton. The catalytic system may also include other components, such as carriers and/or socializaton, and is not limited to catalytic component and/or an activator separately or in combination. The catalytic system may include any number of catalytic components in any combination, and any activator in any combination.

The term "catalytic component" includes any compound which, being respectively activated, capable of catalyzing the polymerization or oligomerization of olefins. Preferably the catalytic component includes at least one atom of group 3 to 12, and optionally at least one leaving group that is associated with it.

The term "leaving group" refers to one or more chemical residues associated with the metal center of the catalyst component, which can be separated from the catalytic component activator obtained with the eat in the particles, active for the polymerization or oligomerization of olefins. Suitable activators are described in detail below.

The term "group", as used here, refers to the "new" numbering system of the periodic system of elements, as described in the CRC Handbook of Chemistry and Physics (David R. Lide ed., CRC Press 81sted., 2000).

The term "substituted" means that the group, the following term has at least one residue in place of one or more hydrogen atoms in any position, with residues selected from such groups as halogen radicals (e.g., Cl, F, Br), hydroxyl groups, carbonyl groups, carboxyl groups, amino groups, phosphine groups, alkoxy groups, phenyl groups, raftiline group1-C10alkyl group, a C2-C10alkeneamine group, and combinations thereof. Examples of the substituted Akilov and allow include (but are not limited to acyl radicals, alkylamino radicals, alkoxy radicals, aryloxy radicals, alkylthio radicals, dialkylamino radicals, alkoxycarbonyl radicals, aryloxyalkyl radicals, carbarnoyl-radicals, alkyl - and dialkylamino radicals, acyloxy radicals, acylamino radicals, arylamino-radicals, and combinations thereof.

Catalytic components include (but are not limited to) the catalysts of the Ziegler-Natta, metallocene catalysts, the catalysts containing the element of the group 15, and the other one-and bimetallic catalysts. The catalyst or catalyst system may also include AlCl3, cobalt, iron, palladium, chromium/chromium oxide or catalysts "Phillips". Any catalyst can be used separately or in combination.

The catalysts of the Ziegler-Natta

Typical compounds of the catalysts of the Ziegler-Natta described in Ziegler Catalysts 363-386 (G.Fink, R.Mulhaupt and H.H.Brintzinger, eds., Springer-Verlag, 1995) or in EP 103120, EP 102503, EP 0231102, EP 0703246, RE 33683, US 4302565, US 5518973, US 5525678, US 5288933, US 5290745, US 5093415 and US 6562905. Examples of such catalysts include catalysts having oxides, alcoholate and halides of transition metals of group 4, 5 or 6 or compounds of oxides, alcoholate and halides of titanium, zirconium or vanadium optionally in combination with a magnesium compound, internal and/or external electrondonor (alcohols, ethers, siloxanes, etc), aluminum - or Borealis and alkylhalogenide and inorganic oxide carriers.

In one or more options can be used in the catalysts of transition metals of the traditional type. Traditional catalysts of transition metals include traditional catalysts of the Ziegler-Natta shown in U.S. patents№№ 4115639, 4077904, 4482687, 4564605, 4721763, 4879359 and 4960741. The catalysts of transition metals of the traditional type can be represented as fo what moloi MR xin which M represents a metal of groups 3-17, or a metal of groups 4-6, or a metal of group 4, or titanium, R is a halogen or hydrocarbonate group, and x represents the valence of the metal M. Examples of R include alkoxy, phenoxy, bromide, chloride and fluoride. The preferred catalytic compounds of transition metals of the traditional type include compounds of transition metals of groups 3-17, or groups of 4-12, or groups of 4-6. Preferably M represents titanium, and catalysts of transition metals of the traditional type, in which M represents titanium, include TiCl4, TiBr4, Ti(OC2H5)3Cl, Ti(OC2H5)Cl3, Ti(OC4H9)3Cl, Ti(OC3H7)2Cl2, Ti(OC2H5)2Br2, TiCl3•1/3AlCl3and Ti(OC12H25)Cl3.

Catalytic transition metal compounds of the traditional type on the basis of electron-donor complexes of magnesium/titanium considered, for example, in U.S. patent No. 4302565 and 4302566. Also considered are the catalysts derived from the Mg/Ti/Cl/THF, which are well known to specialists in this field of technology. One example of a General method of producing such a catalyst includes the following: dissolution of TiCl4in THF, reconnecting to TiCl3using Mg adding MgCl 2and removing the solvent.

With the above catalytic transition metal compounds of the traditional type can also be used in connection socialization traditional type. Connection socialization traditional type can be represented by the formula M3M4vX2cR3b-cin which M3is a metal of groups 1-3 and 12-13, M4is a metal of group 1, v is a number from 0 to 1, each X2is any halogen, represents a number from 0 to 3, each R3represents a monovalent hydrocarbon radical or hydrogen, b is a number from 1 to 4, and (b-c) is at least 1. Other ORGANOMETALLIC compounds socialization traditional type for the above-mentioned catalytic transition metal compounds of the traditional type have the formula M3R3kwhere M3is a metal of group IA, IIA, IIB or IIIA, such as lithium, sodium, beryllium, barium, boron, aluminum, zinc, cadmium and gallium, k = 1, 2, or 3 depending upon the valency M3whose valency in turn normally depends upon the particular group to which belongs to M3and each R3can be any monovalent radical, which includes the hydrocarbon is passed radicals and hydrocarbon radicals, containing an element of groups 13 to 16, for example fluoride, aluminum, or oxygen, or a combination of both.

Chromium catalysts

Suitable chromium catalysts include disubstituted chromates, such as CrO2(OR)2where R represents triphenylsilane or tertiary paleoliticheskie alkyl. Chromium catalyst system may optionally include CrO3chromatin, silylpropyl, chamillard (CrO2Cl2), chromium-2-ethylhexanoate, chromatiaceae (Cr(AcAc)3and so Typical chromium catalysts are additionally described in U.S. patent No. 3709853, 3709954, 3231550, 3242099 and 4077904.

Metallocene

Metallocene in the General plan are described, for example, in 1 & 2 Metallocene-Based Polyolefins 366-378 (John Scheirs &W. Kaminsky, eds. John Wiley & Sons, Ltd., 2000), G.G.Hlatky, 181 Coordination Chem. Rev. 243-296 (1999), and, in particular, for use in the synthesis of polyethylene in 1 Metallocene-Based Polyolefins 261-377 (2000). Metallocene catalyst compounds can include compounds "half sandwich" and "full sandwich", having one or more CP ligands (cyclopentadienyl and ligands, isolable to the cyclopentadienyl)associated with at least one metal atom of groups 3 to 12, and one or more leaving groups associated with at least one metal atom. Furthermore, these compounds are referred to as "metallocene" or "metallocene catalyst components.

the p-ligands comprise one or more rings or ring system (s), at least part of which includes π-bonded systems, such as cyclopentadienyls ligands and heterocyclic analogues. Ring (ring) or ring system (s) typically include atoms selected from atoms of groups 13-16, or atoms, which receive the ligands may be selected from carbon, nitrogen, oxygen, silicon, sulfur, phosphorus, germanium, boron and aluminum and combinations thereof where the carbon is at least 50% of ring elements. Or SR-a ligand(s) can be selected from substituted and unsubstituted cyclopentadienyls ligands and ligands, isolobal to cyclopentadienyl, non-limiting examples of which include cyclopentadienyl, indenyl, fluorenyl and other structures. Other non-limiting examples of such ligands include cyclopentadienyl, cyclopentanophenanthrene, indenyl, benzinger, fluorenyl, octahydronaphthalene, cyclooctatetraene, Cyclopentasiloxane, phenanthridines, 3,4-benzofuranyl, 9-phenylfluorene, 8-H-cyclopent[a]acenaphthylene, 7H-dibenzofurans, indeno[1,2,9]Andren, titanoides, thiophenolate, their hydrogenated versions (e.g., 4,5,6,7-Tetra-hydroengine, or “H4Ind”), substituted versions and their heterocyclic variants.

Catalysts containing elements of group 15

"Catalysts containing elements of group 15 can include a complex of the metals of groups 3-12, where the metal is 2-8 coordination, coordinating residue or residues include at least two atoms of the element of group 15. In one embodiment, the catalytic component containing elements of group 15 may be a complex of a metal of group 4 and one to four ligands, so that the metal of group 4 is at least 2-coordination and coordinating residue (or residues) consists of at least two atoms of nitrogen. Typical compounds containing elements of group 15, are considered, for example, in WO 99/01460, EP A1 0893454, EP A1 0894005, US 5318935, US 5889128, US 6333389 B2 and US 6271325 B1. In one embodiment, the catalyst containing an element of group 15, may include aminophenols complexes of group 4, bis(amide) complexes of the group 4 and pyridylamine complexes of group 4, which are active for the polymerization of olefins in any degree.

In one or more preferred options is mixed catalyst system, or "mnogokletochnye system. Mixed catalyst system includes at least one metallocene catalyst component and at least one nepetalactone component. Mixed catalyst system can be described as a bimetallic catalyst composition, or mnogokletochnye composition. As used here, the term "bimetallic catalyst the composition is" and "bimetallic catalyst" includes any composition, the mixture or system that includes two or more different catalytic components, each with a different metal band. The terms "multicatalytic composition" and "multicatalytic" includes any composition, mixture or system that includes two or more different catalytic components regardless of the metals. Therefore, the term "bimetallic catalyst composition," "bimetallic catalyst", "the multicatalytic composition and multicatalytic" together are referred to here as "mixed catalyst system, unless specifically noted otherwise. Any one or more different catalytic components may be on the media or no media.

Activators

The term "activator" includes any compound or combination of compounds on the carrier, or without the media, which can activate one catalytic compound (for example, metallocene, catalysts containing elements of group 15), for example, cationic particles of the catalytic component. This usually involves separating the at least one of the leaving group (X-group in the formulas/structures above) from the metal center of the catalyst component. The catalytic components of the described options are activated, thus, for the polymerization of olei the s with the use of such activators. Variants of such activators include Lewis acid, such as cyclic or oligomeric poly(hydro-carbylamines) and the so-called recoordination activators (("NCA")(NCA)) (alternative ionizing activators" or "stoichiometric activators") or any other compound that can convert a neutral metallocene catalyst component to a metallocene cation, which is active with respect to the polymerization of olefins.

The Lewis acid can be used to activate described metallocene. Typical Lewis acid include, but are not limited to) alumoxane (e.g., "MAO"), modified alumoxane (for example, "TIBAO" (TIBAO)) and alkylamines connection. You can also use ionizing activators (neutral or ionic, such as tri(n-butyl)ammoniates(pentafluorophenyl)boron. In addition, can be used metallogeny predecessor tripartition. Any of these activators/precursors can be used alone or in combination with others.

MAO and other aluminium-containing activators known in the art. Ionizing activators known in the art and described, for example, in the work of Eugene You-Xian Chen & Tobin J. Marks.Cocatalysts for Metal-Catalyzed Olefin Plymerization: Activators, Activation Processes, and Structure-Activity Relationships.100 (4) Chemical Reviews, 1391-134 (2000). The activators can be associated or linked to a carrier or in Association with a catalytic component (for example, metallocene or separately from the catalytic component, as described by Gregory G. Hlatky,Heterogeneous Single-Site Catalysts for Olefin Polymerization.100 (4) Chemical Reviews, 1347-1374 (2000).

Industrial applicability

Bimodal composition can be used in a wide range of products and end uses. Bimodal composition may be mixed and/or coextrusion with any other polymer. Non-limiting examples of other polymers include linear low density polyethylene, elastomers, plastomer, low-density polyethylene high-pressure, high density polyethylene, polypropylene etc.

Bimodal composition and the mixture used for forming operations such as extrusion and coextrusion film, sheet, and fiber, as well as blow molding, injection molding and rotary molding. The film may include a film obtained by blown or cast films formed by coextruding or lamination is used as a shrinkable film, cling film, stretch film, sealing films, oriented films, packing snacks, heavy duty bags, grocery bags, packaging baked and frozen food, medical packaging, industrial the military gaskets membranes, etc. in applications with food contact and without contact with food. The fibers may include fibers obtained by spinning operations of the melt-spun from a solution and aerodynamic method, for use in woven and non-woven form to receive filters, diaper fabrics, medical garments, geotextile materials, etc. Extrudable products may include medical tubing, wire and cable coatings, pipes, geomembranes and earthen basins. Molded articles may include single - and multi-layered constructions in the form of bottles, tanks, large hollow articles, rigid food containers and toys, etc.

Examples

To provide a better understanding of the above description provides the following non-limiting examples. Although examples can be assigned to individual options, they should not be construed as limiting this invention in any single respect. All parts, proportions and percentages are given by weight, unless otherwise indicated. Molecular weight, including srednevekovoy molecular weight Mw, srednekamennogo molecular weight Mn of the z average molecular weight Mz and (z+1)-average molecular weight Mz+1, determined by gel chromatography ((GPC)(GPC), also known as high-performance gel permeation chromatography ((VP is)(SEC)).

Examples 1-12

In each of examples 1-12 bimodal composition of high density polyethylene with a physical mixture of different quantities of the first polyethylene component, or high-molecular polyethylene component (("CMC")("HMWC")), with the second polyethylene component, or a low molecular weight polyethylene component (("NMC")("LMWC")). CMC is polymerized using a gas-phase reactor system with a catalytic system, spray dried. The catalytic system comprises (phenylmethyl)[N'-(2,3,4,5,6-pentamethylbenzyl)-N-[2-[(2,3,4,5,6-pentamethylbenzyl)amino-kN}ethyl]-1,2-atendimento(2-)kN,kN']zirconium. The catalyst was activated with MAO, methylalumoxane. Using the "dry method", meaning that the material is introduced into the reactor in the form of a dry powder (granules).

Reaction conditions are as follows:

the partial pressure of ethylene 220 psi

temperature 85°C

H2/S20,0035

With6/S20,005

the mass layer 115 lb

the density of the fluidized bed 13 to 19 lb/ft3

superficial gas velocity 2-2,15 ft/s

dew point 55-60°C

the concentration of isopentane 10-12%

NMC is polymerized using a gas-phase polymerization in the presence of a metallocene catalyst. In particular, the catalytic system is a bis(n-propyl) - Rev. clopidogrel)zirconiated. The catalytic system is also activated with the use of MAO, and used the "dry method".

Reaction conditions are as follows:

the partial pressure of ethylene 220 psi

temperature 85°C

H2/S20,0035

With6/S20,005

the mass layer 115 lb

the density of the fluidized bed 13 to 19 lb/ft3

superficial gas velocity 2-2,15 ft/s

dew point 55-60°C

the concentration of isopentane 10-12%

Comparative examples 13-15

In comparative examples 13-15 NMC is polymerized as in examples 1-12, but CMC is polymerized in a gas phase reactor in the presence of catalytic systems with silicon dioxide as the carrier. Catalyst system includes a catalyst of Ziegler-Natta on the media (dibutylamino/butyl alcohol/TiCl4/SiO2). The catalytic system is also activated with the use of MAO, and used the "dry method".

Reaction conditions are as follows:

the partial pressure of ethylene 220 psi

temperature 85°C

H2/S20,0035

With6/S20,005

the mass layer 115 lb

the density of the fluidized bed 13 to 19 lb/ft3

superficial gas velocity 2-2,15 ft/s

dew point 55-60°C

the concentration of isopentane 10-12%

In each of examples 1-12 and comparative examples 13-15 granules CMC and TMC mix the dry mixture with Irganox 1010 (1000 ppm) and Irgafos 168 (1000 ppm) and compounding using a single screw extruder Prodex with two mixing heads with the formation of bimodal compositions of high density polyethylene. Resin properties and data high-performance gel permeation chromatography ((VEH)(SEC)shown in the table.

Also determine the resistance to cracking under the influence of the environment (SROS)(ESCR)) polyethylene compositions. Test SERVOS carried out in accordance with ASTM D 1693, methodology, F50 watch. Plate for testing has a size of 38 mm × 13 mm Plate has a thickness 1,90 mm Data tests for resistance to cracking under the influence of the environment (SROS) presented in the table.

Bottles made of polyethylene compositions produced by blow molding using a molding machine blown Impco model A12. Composition ekstragiruyut at 190°C through a die plate with hole diameter 1,625 inch blown and molded with the formation of the bottle 1/2 gallon. Time (t) extruding the billet is 2.0 C. Each bottle has a wall thickness of from about 0.01 inch to about 0.03 inch.

Also calculate the percentage swelling of the extrudate ((% DS) (% OM)). Composition ekstragiruyut at 190°C and shear rate 997,2 with-1. The polymer flow with constant velocity through the capillary die plate 20 mm in length and 1 mm in diameter. Determine the time (t) in seconds extruding rod length 15,24 see the Percentage swelling of the extrudate is determined by {D/D0-1}×100, where D0represents the diameter of the nozzle (1 mm), and D represents the FDS is th average diameter of the extruded rod, calculated as follows:

D=20*[t*0,075/(15,24*π*0,7693)]0,5

The percentage swelling of the extrudate (% OM) of polyethylene compositions shown in the table below.

Also determine the amount of short chain branching of the macromolecular components. The CMC samples produced by adding approximately 3 ml of a 50/50 mixture tetrachlorethane-d2/orthodichlorobenzene (0.025 M in chromatiaceae (agent relaxation)to 0.4 g of CMC in 10 mm NMR tube. The sample is dissolved and homogenized by heating the tube and its contents to 150°C. the Data obtained using the NMR spectrometer Varian UNITY Inova 400 MHz in accordance with the 13C resonance frequency to 100.4 MHz. The collected parameters are selected to provide quantitative collection13With data in the presence of the agent relaxation. Data is obtained using a managed1N. separation, 4000 variables on the data file, 7-second pulse repeat delay, spectral width 24200 Hz and the file size is 64K data points with the head of the samples heated to 110°C.

Comparative example 16

Comparative polyethylene composition is polymerized in a gas phase reactor in the presence of a chromium catalyst. The composition has a density 0,9530 g/cm3the flow index (I21) 33 g/10 min, a melt index (I2) 0.39 g/10 min, MFR (I21/I2) 85. Mn is 13699, Mw status is made 125648, and MMD is 9,17. Some of SERVOS composition is 24-48 hours Bottle obtained from this composition, weighs 73 g, and the composition has a percent die swell of about 73%.

As shown in the table, examples 1-12 provide the composition with a surprising and unexpected values SERVOS in combination with excellent percentage swelling of the extrudate. It should be noted that examples 1 and 10 provide compositions having SERVOS more than 1000 h and the percentage of extrudate swell of over 75%. Example 1 also provides a lot of bottles around 83, Also visible are the examples 8 and 11, which provide compositions having values of SERVOS more than 800 hours, the percentage of extrudate swell of above 80% and the weight of the bottle over 80, on the Contrary, none of the comparative examples does not provide a composition having SERVOS more than 212 hours Best interest of extrudate swell of 74,9% (comparative example 15) has a mass of bottles only, 66,7

For convenience, various specific test methods are identified to determine properties such as average molecular mass, molecular mass distribution (MMD), flow index (FI)(it)), the melt index ((MI)(IR)), the ratio of the melt fluidity (MFR) and density. However, when a specialist in the art reading the patent, and the op wants is adelite, any composition or polymer has a specific property defined in the claims, then any published or well-known method or test method can be used to determine this property (although specifically identified technique is preferred, but any method defined in the claims, is mandatory, and not only preferred). Any claim should be construed as encompassing any of these methods, even if different methods can give different results or measurements. Thus, the specialist in the art should wait experimental deviations defined properties, which are reflected in the claims. All numeric values must be considered as corresponding to the "about" or "approximately" the set value due to the nature of the tests at all.

Unless otherwise stated, all digital expressing quantities of ingredients, properties, reaction conditions, etc. used in the description and the claims, should be understood as approximate values in relation to the desired properties obtained by the present invention, and the measurement error, etc. should at least be construed in light of the number of published numerical values on the conventional methods of rounding. Although digital intervals and the values set for the broad scope of the invention, are approximate values set digital values are specified as accurately as possible.

Various terms used here are defined above. If a term used in the claims, is not defined above or hereinafter, specialists in the art should take the broadest definition of this term, as reflected in one or more printed publications or issued patents. In addition, all priority documents are incorporated fully herein by reference for all areas in which the introduction of Pets. All documents referenced herein, including testing procedures are also given here in full as a reference for all of the areas in which this introduction allowed.

Although the above refers to variants of the present invention, other and additional variants of the invention may be devised without departure from its main volume and its volume is determined by the claims which follows.

1. Bimodal polyethylene composition suitable for the production of blown, including:
at least one high molecular weight polyethylene component having a molecular mass distribution (MMD) of about 6 to note the RNO 9, the content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain, and z-average molecular weight (Mz) of about 1100000 or more; and
at least one low molecular weight polyethylene component,
in which the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 20 or less; and the composition has a density of about 0,94 g/cm3or more, resistance to cracking under the influence of the environment (SROS) approximately 600 h, determined in accordance with ASTM D 1693, or more and the percentage of extrudate swell of about 70% or more.

2. The composition according to claim 1, in which the high molecular weight polyethylene component has a (z+1) - average molecular weight (Mz+1) of about 2000000 or more.

3. The composition according to any one of claims 1 and 2, in which high molecular weight polyethylene component has a content of co monomer from approximately 0, 3 mol.% to about 1 mol.%.

4. The composition according to claim 1, in which the composition has a density of about 0.96 g/cm3or more.

5. The composition according to claim 1, in which the high molecular weight polyethylene component is present in an amount of about 60 wt.% or less by weight of the composition.

6. The composition according to claim 1, in which the high is ularly polyethylene component is present in an amount of about 50 wt.% or less by weight of the composition.

7. The composition according to claim 1, in which the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 15 or less.

8. Bimodal polyethylene composition suitable for the production of blown, including:
at least one high molecular weight polyethylene component having a molecular mass distribution (MMD) from about 6 to about 9, a z-average molecular weight (Mz) of about 1100000 or more and (z+1) - average molecular weight (Mz+1) of about 2000000 or more, and
at least one low molecular weight polyethylene component having a molecular weight of 50,000 or less,
in which the composition has a density of about 0,94 g/cm3or more, resistance to cracking under the influence of the environment (SROS) approximately 600 h, determined in accordance with ASTM D 1693, or more and the percentage of extrudate swell of about 70% or more.

9. The composition according to claim 8, in which high molecular weight polyethylene component has a content of short-chain branching of from about 1.0 to about 2.0 branches per 1000 carbon atoms of the main chain.

10. The composition according to claim 8, in which high molecular weight polyethylene component has a content korotkotsepochechnye what's branches is less than approximately 2 branches per 1000 carbon atoms of the main chain.

11. Composition according to any one of p-10, in which high molecular weight polyethylene component has a content of co monomer from approximately 0, 3 mol%. to about 1 mol%.

12. The composition according to claim 8, in which high molecular weight polyethylene component is present in an amount of about 50 wt.% or less by weight of the composition.

13. The composition of claim 8 in which the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 20 or less.

14. The composition of claim 8 in which the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to srednevekovoi molecular weight low molecular weight polyethylene component is about 15 or less.

15. Extruded bottle, made from a composition including:
bimodal polyethylene composition having at least one high molecular weight polyethylene component having a molecular mass distribution (MMD) from about 6 to about 9 and the content of short-chain branching is less than approximately 2 branches per 1000 carbon atoms of the main chain, in which
high molecular weight polyethylene component is present in an amount of about 50 wt.% or less by weight of the compositions is AI; and
the composition has a density of about 0,94 g/cm3or more, resistance to cracking under the influence of the environment (SROS) approximately 600 h, determined in accordance with ASTM D 1693, or more and the percentage of extrudate swell of about 70% or more; and where the
bottle blow molded so that it has a wall thickness of from about 0,254 mm (0.01 inch) to about 0,762 mm (0.03 inches) and weighs at least 70,

16. The bottle indicated in paragraph 15, in which high molecular weight polyethylene component has a (z+1)- average molecular weight (Mz+1) of about 2000000 or more.

17. The bottle according to any one of p and 16, in which the content of short-chain branching is from about 1.0 to about 2.0 branches per 1000 carbon atoms of the main chain.

18. The bottle indicated in paragraph 15, in which high molecular weight polyethylene component has a content of co monomer from about 0.3 mol.% to about 1 mol.%.

19. The bottle indicated in paragraph 15, further containing at least one low molecular weight polyethylene component having a molecular weight of 50,000 or less.

20. The bottle indicated in paragraph 15, in which high molecular weight polyethylene component is present in an amount of about 60 wt.% or less by weight of the composition.

21. The bottle indicated in paragraph 15, in which the ratio srednevekovoi molecular weight of high molecular weight polyethylene component to the media is awesomei molecular weight low molecular weight polyethylene component is about 20 or less.

22. The bottle indicated in paragraph 15, in which the wall thickness is from about 0,432 mm (0,017) inch to about 0.66 mm (0,026 inch), and the weight of the bottle is at least 75,



 

Same patents:

FIELD: chemistry.

SUBSTANCE: resin has melt index MI5 from 0.40 to 0.70 g/10 min and contains from 47 to 52 wt % low-molecular polyethylene fraction and from 48 to 53 wt % high-molecular polyethylene fraction, where the high-molecular polyethylene fraction includes a copolymer of ethylene and 1-hexene and 1-octene.

EFFECT: improved hydrostatic properties.

5 cl, 3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polyethylene mixed compositions, intended for film manufacturing, which include two or more different ethylene polymers, each of which has different degree of complexity of long chain branching. Polyethylene composition is practically linear and has average index of branching constituting 0.85 or less. In addition, composition has density 0.935 g/cm3 or less, dullness - 10% or less and stability to falling load impact - 100g/mm or more, determined according to ASTM D-1709 methodology.

EFFECT: polyethylene compositions possess definite combination of required properties and characteristics, good optic properties and strengthening characteristics.

15 cl, 1 dwg, 5 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention refers to making a moulded product for handling clean-room materials, intermediate products or end products, such as a container, a tray and a tool. The moulded product is made of resin compound prepared by mixing in melt cycloolefine polymer (A) 100 weight fractions chosen from the group including bicyclo[2.2.1]-2-heptene and its derivatives, tricyclo [4,3,0,12,5]-3-decene and its derivatives, and tetracyclo[4,4,0,12,5,17,10]-3-dodecene and its derivatives of vitrification temperature within 60 to 200°C, and amorphous or low-crystalline elastic copolymer (B(b1)) 1 to 150 weight fractions. Copolymer (B(b1)) is polymerised from at least two monomers chosen from the group including ethylene and a-olefin with 3 to 20 carbon atoms and vitrification temperature 0°C or lower. The compound contains radical polymerisation initiator 0.001 to 1 weight fractions containing peroxide, and polyfunctional compound (D) 0 to 1 weight fractions. The compound (D) has at least two radical-polymerised functional groups chosen from the group including vinyl group, allylic group, acrylic group and methacrylic group in a molecule.

EFFECT: clean-room moulded product is characterised with good chemical stability, heat resistance and dimensional accuracy, it prevents volatile component release in the surrounding space, has good abrasion resistance and prevents particle formation.

19 cl, 1 tbl, 2 dwg, 12 ex

Polyethylene films // 2349611

FIELD: packing industry.

SUBSTANCE: invention relates to polyethylene films and first of all to bimodal polyethylene compositions designed for the production of films with low impurities content and increased manufacturability. The film contains polyethylene composition with the density of 0.940-0.970 g/cm3 and melt index value (I21) measured according to ASTM-D-1238-F technique 190°C/21.6 kg, from 4 to 20 dg/min. The polyethylene composition contains a high-molecular component with the average molecular weight more than 50000 and a low-molecular component with the average molecular weight less than 50000.

EFFECT: definite combination of the composition polymer characteristics meets the commercial requirements to the production of polyethylene films suitable for manufacturing the films by moulding, blow formation and other methods, the films are characterised by improved operational parameters along with high film quality that is revealed by low gel fraction content and simultaneous retention of strength, flexibility and impact resistance values.

28 cl, 7 dwg, 6 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: invented here is a copolymer of ethylene with α-olefins, with molecular weight distribution Mw/Mn from 1 to 8, density from 0.85 to 0.94 g/cm3 , molecular weight Mn from 10000 g/mol to 4000000 g/mol, not less than 50% distribution width index of the composition, and at least, bimodal distribution of branching of side chains. Branching of side chains in maximums of separate peaks of distribution of branching of side chains in all cases is larger than 5 CH3/1000 carbon atoms. Ethylene copolymers are obtained in the presence of a catalyst system, comprising at least, one monocyclopentadienyl complex A) or A'), optionally an organic or inorganic substrate B), one ore more activating compounds C) and optionally one or more compounds, containing group 1, 2 or 13 metals of the periodic system D).

EFFECT: invented compounds have bimodal distribution of short-chain branching and narrow molecular weight distribution, as well as high impact property.

11 cl, 1 tbl, 3 ex, 2 dwg

FIELD: chemistry.

SUBSTANCE: present invention pertains to a method of obtaining a resin composition. Description is given of the method of obtaining a resin composition through mixture in a molten mass of 100 weight parts of cyclic olefin polymer (A), whose glass transition temperature ranges from 60 and 200°C, and 1-150 weight parts of elastic polymer (B), with glass transition temperature 0°C or lower. Part of the cyclic olefin polymer (A) is first mixed in a molten mass with elastic polymer (B) and 0.001-1 weight parts of radical polymerisation initiator (C). The remaining cyclic olefin polymer (A) is then added and mixed in the molten mass. The ratio of the quantity of cyclic olefin polymer (A), initially added, to the quantity of the same polymer added later (initially added/added later) ranges from 1:99 to 70:30. Cyclic olefin polymer (A) is divided into two parts and added separately twice, such that, the mixture with a cross-linked structure can be diluted with cyclic olefin polymer (A), without a cross-linked structure. As a result, increase in the viscosity of the molten resin composition can be prevented.

EFFECT: good abrasion resistance and good moulding properties of the molten mass.

15 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: film is made from polymer mixture, which contains (wt %): 50-90% composition of the ethylene polymer and 10-50% polymer component on ethylene basis, having a density in the range from 0.9 to 0.930 g/ml and molten flow-rate till 4 g/10 min. Composition of the ethylene polymer contains a recurring unit, obtained from an ester, selected from (1) ethylene-unsaturated organic monomer in the form of esters unsaturated C3-C20 monobasic carboxylic acids and C1-C24 univalent aliphatic or alicyclic alcohols, (2) vinyl esters saturated C2-C18 carboxylic acids, where the content of esters is in the range from 2.5-8 wt %. Composition of the ethylene polymer has a density in the range from 0.920 to 0.94 g/ml. Stretchable packing film has a relation between the value of tear resistance longitudinally and the vale of tear resistance transversely, which exceeds 0.3 and the value of ultimate tensile strength lengthwise 30% in the range from 6.5 to 15 N.

EFFECT: effective application in the capacity of stretching adhesive covers in various operations in linking packing and wrapping.

6 cl, 3 tbl, 17 ex

FIELD: chemistry.

SUBSTANCE: polymer composition contains low- and high-molecular polyethylene components, the composition basically having a single peak of lamella width percentile curve and PENT greater than 1000 hours at 80°C and 2.4 MPa according to ASTM F1473. The process has several variants allowing production of tubes with enough viscosity to resist shock during laying or afterward; and with extra long working life under gas or water pressure, especially resistant to environmental stress cracking and to creep under internal pressure.

EFFECT: higher impact elasticity and longer working life of tubes.

37 cl, 5 dwg, 3 tbl, 7 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to soft polymer compositions containing large amount of inorganic fillers. Composition according to invention contains 20-60% heterophase polyolefin composition (I) and 40-80% inorganic filler (II) selected from fire-retardant inorganic fillers and inorganic oxides or salts. Moreover, heterophase polyolefin composition I includes 8 to 25% crystalline polymer component (A) selected from propylene homopolymer, propylene copolymers, and mixtures thereof, and 75 to 92% elastomer fraction (B) composed of at least elastomeric propylene 04 ethylene copolymer with 15-45% of at least one α-olefin. Heterophase polyolefin composition I is characterized by solubility in xylene at room temperature above 50%, while intrinsic viscosity of xylene-soluble fraction ranges between 3.0 and 6.5 dL/g. Polyolefin compositions of invention find their use as substitute of plasticized polyvinylchloride.

EFFECT: increased plasticity of materials at the same good thermoplastic properties.

15 cl, 1 dwg, 2 tbl, 10 ex

FIELD: biopolymers.

SUBSTANCE: invention relates to production of plastic masses based on ethylene and vinylacetate copolymer for mould products useful in food processing industry and agriculture. Claimed composition contains 50-68.7 mass % of ethylene and vinylacetate copolymer, biologically degradable filler containing rye flour in amount of 30-48,7 mass % and additives such as surfactant in amount of 0.1 mass %, maize amylacetate in amount of 1 mass %, and 0.2 mass % of methylcellulose.

EFFECT: new biologically degradable composition.

2 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to techniques of producing high-strength thermosetting films. Proposed method comprises mechanical missing of granules of several types of polyethylene and film extrusion with its subsequent pneumatic expansion. Extrusion rate makes over 18 m/min. Mix of granules contains unimodal low-pressure polyethylene and bimodal high-pressure polyethylene.

EFFECT: optimum ratio of components allow optimum physicochemical parametres and increased strength.

2 dwg, 2 tbl

FIELD: metallurgy.

SUBSTANCE: compound mould-complete set for usage on standard machines for blown die casting with drawing consists of halves of compound mould, which are agreeably installed on each plate of die-casting machine. Each half of mould allows system of slots of mould for die casting and system of slots of blown mould for blow melting with drawing of performs into blown products. Corresponding different slots are located so that they are open in the same direction of mould separation. Mould-complete set is provided for usage in method of moulding of plastic products, according to which in slot of mould for die casting it is casted perform under pressure, which is then blown out in form in slot of blown mould. Mould contains system of slots of mould for die casting and system in essence of elongated slots of blown mould, allowing each neck area. Each slot of each system is formed at least by two parts of mould, implemented with ability of separation in corresponding direction of its separation. Separation direction of slots of mould for die casting and slots of blown mould it is formed common direction of separation of mould, so at operation mould can be opened for release as die casted preforms, as and blown products. Longitudinal axis of slots of blown mould pass essentially perpendicularly to common direction of separation of mould, and its neck areas join to its external boundary, so that access to it is possible on the outside transversal to axis of opening and closing travel. Device for blown die casting or with drawing, of plastic products contains mould-complete set by invention. Method of blown moulding of plastic products, in which it is used mould-complete set, is formed by die casting of preform with usage of slots of mould for die casting; drawn and/or blown out in form of previously die casted preforms in slots of blown mould; it is opened mould-complete set for release of die casted preforms and blown products and there are traveled die casted preforms into slots of blown mould.

EFFECT: single-phase process, using low power consumption and ability to work with awkward shapes or products with width neck, not requiring expensive equipment.

26 cl, 65 dwg

FIELD: process engineering.

SUBSTANCE: outer hose is extruded concentric with lengthwise central axis and crimped with the help of partial vacuum fed from outside. Inner hose is extruded concentric with lengthwise central axis of outer hose. Inner hose is welded to recesses of outer hose crimps. Outer hose is expanded by partial vacuum to form pipe coupling. Gas is forced into inner hose at pressure above atmospheric pressure to produce pipe coupling. Note here that inner hose is pressed down for its surface to be extended over the outer hose extended section. Transition section is formed between pipe coupling and adjacent recess of crimp, directed outward relative to central lengthwise axis. Note here that outer pipe transition section is furnished with at least one channel extending towards adjacent crimp ridge.

EFFECT: complete fit of entire surface, possibility to weld inner pipe to outer pipe in transition section.

10 cl, 14 dwg

FIELD: technological processes.

SUBSTANCE: device and method are intended for extraction of plastic briquettes from appropriate holders in process of various moulding. Device is intended for extraction of plastic briquettes, which comprises the first part that defines briquette body having previously specified size in transverse direction, and the second part in the form of ring that is adjacent to the first one and has larger size in transverse direction compared to the first part. Device also comprises support structure, gripping facilities intended for extraction of manufactured briquettes from conditioning cavities arranged on revolver head. It comprises appropriate plate fixed to support structure and including gripping facilities that comprises multiple rectilinear slots installed parallel to one previously specified direction (D). Moreover, in each slot there are the first sections arranged, which have the first previously specified width (L1), and the second sections, in which local narrow spots are arranged, having the second previously set width (L2). The second previously set width (L2) is less than appropriate size of the second part of briquette in transverse direction, but is more than appropriate sizes of the first part of briquette. Besides, the first width (L1) provides for possibility of briquettes insertion in slot with their second part, and the second width (L2) does not make it possible to insert the briquettes with their second part in slot. Moreover, according control and working means are provided that make it possible for the plate to move in direction (D) for the previously specified distance. Briquettes are gripped by plate and are extracted from conditioning cavities by means of reciprocal motion of plate and conditioning cavities in opposite sides from each other. Each slot comprises wider sections and local narrow spots, width of which (L2) is less than diametre of ring available on briquette, which makes it possible to insert the ring into slot, passing it through wider section of slot. Plate is moved in direction "D" by a certain value until local narrow spots are located under the ring, and therefore afterwards briquettes are removed by means of plate displacement in direction, in which it is diverged away from holders.

EFFECT: production of device that is simple and reliable in operation, achievement of high efficiency levels during operation of plant for injection moulding, economic efficiency in manufacturing, control and maintenance.

11 cl, 39 dwg

FIELD: chemistry.

SUBSTANCE: said additive is an acetylated glycerine ester of a fatty acid, which is effective in reducing coefficient of friction of a moulded object. The invention also relates to an object moulded from polyethyleneterephtalate, such as a container and method of improving packing efficiency of perfom for bottles into a container.

EFFECT: reduced polymer yellowing and coefficient of friction to 0,66 in a 25 s cycle.

22 cl, 3 dwg, 1 tbl, 5 ex

FIELD: mechanics.

SUBSTANCE: device for blow moulding of plastic bottles, particularly, from poly(ethylene terephthalate) preforms, comprises a rotary turntable furnished with multiple moulds arranged along the turntable edges to revolve about its axis (X). Every mould comprises, at least, two half-moulds arranged to be opened and closed to form cavities, primarily three cavities with their axes of symmetry located in one plane. The device comprises also the appliance for opening and closing said half-moulds by rotating them about second axis (Y) perpendicular to first axis (X), and the appliance designed to the preforms to the moulds, control system designed to control preforms and fluid medium feed. Aforesaid cavities are controlled separately in blowing so that to inhibit blowing in cavities with no preforms. The control system controls feeding fluid medium into the cavities of each mould, allowing blow moulding only in cavities with preforms fed therein. The applicant describes also the PETP bottle blow moulding method.

EFFECT: reliability, flexibility reduced amount of rejects.

6 cl, 13 dwg

FIELD: chemistry.

SUBSTANCE: polyethylene terephthalate (PETP) resin is resulted from polymerisation of melted intermediate polymerisation product at low pressure or in inert gas medium. The disclosed PETP resin is characterised with intrinsic viscosity [η] 0.4 to 2.5 dl/g, carboxyl terminal group content 30 mekv/kg or lower, acetaldehyde content 10 mass fractions or less, colour displayed by value L=99 or more and value b=0.4 or less, chain-length distribution Mw/Mn 1.8 to 2.3 and cyclic trimer content 5 wt % or less. There is also disclosed polymerisation procedure, a polymerisation reactor, moulding process and moulded material.

EFFECT: polymerisation procedure allows making polyester resin by simplified technology with low crystallinity, small portion of cyclic trimer and improved processing quality.

26 cl, 8 dwg, 12 tbl, 32 ex

FIELD: mechanics, heating.

SUBSTANCE: plant for conditioning molded plastic objects comprises continuous transportation device creating helical trajectory of transportation of, at least, one plastic article. Device first section of thermal conditioning comprises, at least, one channel via which, at least, one plastic article can be transported that serves to perform thermal conditioning by heating and/or cooling the aforesaid article. Conveyor appliance carries, at least, one plastic article from the first heating section for preset time interval so that temperature redistribution occurs inside plastic article, and carries it again back inside the first section of thermal conditioning. The aforesaid one channel comes across, at least two sections of the said conveyor appliance arranged side by side. Note here each of the said section belong in different spirals of conveyor appliance.

EFFECT: compact plant for high-speed continuous thermal conditioning of molded plastic products.

11 cl, 9 dwg, 1 ex

FIELD: mechanics, metallurgy.

SUBSTANCE: proposed machine incorporates multiple polymer material injection mold units, a knee-and-column device to extract workpieces from the molds furnished with guillotine-type gripping elements that travel in between two halves of the open mold to grip the workpiece and the external position. The machine is also provided with a cooling turret with the surfaces accommodating a set of cups intended for conditioning the workpieces, which moves about its horizontal axis and reciprocates upward between the top position above the extraction knee-and-column device receiving the work pieces and the lower position corresponding the extraction table for workpieces. The extraction table features lengthwise cuts with narrowing tooth-like sections intended for gripping the workpieces above the ring and for extracting them from the cups. The method of injection moulding using the proposed machine comprises the following operations, i.e. a) injection of polymer molten material into two-halves mold, b) solidification of products till preset solidification degree that influences the injection cycle, c) opening the mold halves, d) moving the extraction knee-and-column device in the space between the mold halves, e) withdrawing the products from the mold with the help of the aforesaid device, f) moving the extracted products out of the mold halves space, g) releasing the products into the cups of the cooling turret, the cups being arranged on two opposite sides, h) cooling the products till preset temperature, i) turning the turret about horizontal axis and moving it downward, j) extracting the products from the cups with the help of gripping elements arranged on the extraction table.

EFFECT: high efficiency, lower costs because of simplicity and reliability of proposed machine.

11 cl, 39 dwg

FIELD: technological processes.

SUBSTANCE: film includes one or several layers, at least one of which contains 1-10 wt % of anti-skid additive. Additive does not melt or has melting temperature that exceeds , has particle size in the range from 50 to 500 micron and is selected from the group that includes sand, clay, silicon dioxide, cross-linked polyethylenes, other polymers or ultra-high molecular weight polyethylene (UHMWPE). Method for film production includes preparation of resin composition for every layer and its extrusion by blowing with blowing extent in the range from 1.0 to 5.0.

EFFECT: improvement of anti-skid characteristics.

32 cl, 24 dwg, 2 tbl, 2 ex

FIELD: handling or feeding of the material to be shaped.

SUBSTANCE: device has horizontal flat receiving-transmitting member provided with a number of sockets and rotatable head made of a parallelepiped. The sockets can receive pre-moulds from the mould for shaping by casting. The rotatable head has several outer sides provided with a number of sleeves which can receive pre-moulds. The rotatable head is allowed to rotate around the horizontal axis for orientating its outer sides upward and downward. The receiving-transmitting member can move from the position of charging pre-moulds to several positions in the same horizontal plane above some outer sides when they face upward.

EFFECT: enhanced efficiency.

17 cl, 24 dwg

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