Composition based on polypropylene with styrene-based elastomers

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer composition which is used to make sterilisable containers, for example, sterilisable bags or medical packaging for intravenous solutions, for example. The composition contains a heterophase propylene copolymer and styrene-based elastomer(s), wherein the ratio of the flow rate MFR2 (230°C) of the heterophase propylene copolymer to the flow rate MFR2 (230°C) of the styrene-based elastomer (MFR2 (230°C) (A)/MFR2 (230°C)(B))≤1.0. The heterophase copolymer contains a polypropylene matrix and an elastomeric propylene copolymer which contains at least one comonomer selected from a group comprising ethylene and C4-C20 alpha-olefins. The weight content of styrene in each styrene-based elastomer is equal to less than 15%, and the total weight content of styrene-based elastomers (B) from the total amount of polymers in the polymer composition ranges from 16.0 to 46.0%. The polymer composition disclosed herein is particularly suitable for making heat-sealable films.

EFFECT: polymer composition provides high air-tightness of articles made therefrom after sterilisation while maintaining high strength and dullness.

22 cl, 3 tbl

 

The present invention relates to the composition of the polymer used for the preparation of sterilized containers, such as sterilized bags or medical packaging, for example, for intravenous solutions.

In the manufacture of food packaging has been a growth trend of plastic containers, in particular bags containing sterilized products or semi-finished products. Sterilized bags have many advantages over rigid metal packaging, such advantages include, for example, a shorter cooking time/sterilization, as well as the fact that they require less storage space, and easier to remove waste products such bags better taste, etc. Typical bags have a multilayer structure with a polyolefin type polyethylene or polypropylene, with a binder, the barrier and outer layers. It is desirable that the polyolefin passed the final packaging material hardness and high fracture toughness. In addition, the polymers must meet the legal safety requirements, such as the instructions of the U.S. food and drug administration (FDA) in the field soluble in hexane substances.

The same growth trend polyolesters materials observed in health; also the Indus. Similarly, the polymer must pass the final packaging material of sufficient hardness and high fracture toughness. In addition, it should be very transparent and it must have a low content of extractable substances. In the case of application in medicine, a key requirement is that the material must be rather soft, and not hard.

It is known that the impact strength of polypropylene can be improved by dispersion of the elastomer phase in the polymeric matrix with obtaining, thus, heterophase polypropylene composition. This material is also referred to as polypropylene modified with toughness.

As mentioned above, it is known that the heterophase polypropylene modified with toughness, high impact strength, which is why the weight percent of the elastomer dispersed in the matrix, should be large enough, for example, in the sustainable bags usually at least 10%, or even at least 15%.

In the case of food packaging, such as, for example, sterilized bags, or in the case of medical packaging required sterilization processing. Among the most common sterilization procedures include thermal treatment (steam), radiation (beta radiation, electrons or gamma rays) or chemical treatment (usually with ethylene oxide). P the global sterilization is usually performed in the temperature range from approximately 120 to 130°C. Of course, the processing of the polymer in the above sterilization conditions can affect the final properties of the polymer.

For packages, it is very important that after sterilization at a high temperature characteristics of the sealing resin material, in particular in the area of the weld, where together two polymer films, are still at a high level. If sterilization is bad PA strength seam welded connection, fastening, two polymer films of packaging material, the welded connection can easily open under tension. This type of failure is also referred to as "the effect of light opening" (peel effect) and it should be eliminated to the maximum extent possible.

However, it appeared that the characteristics of integrity, in particular for medical bags from the standard heterophase systems, unsatisfactory. In other words, the known with the modified polypropylene impact strength impact strength is governed by the amount of the elastomer. However, the elastomer has a negative impact on the integrity (or resistance to disclosure). Weakness known polypropylene modified with toughness connected with their characteristics tightness after step sterilization, in particular, at higher loadings on the elastomer, which limits their use in the quality of the bags.

In addition, even though compared to pure statistical polypropylene known heterophase systems possess high toughness, they cannot be used in medicine because they have a very matte finish.

In the work of the EP 0765654 A1 describes bags, comprising at least one layer based on the composition of isotactic polypropylene and an elastomeric styrene block copolymer. However, this invention solves the problem of preserving the characteristics of integrity at a high level after sterilization, without losing other good properties required in this area, such as strength and low haze.

Considering the above disadvantages, the present invention features a polymer that provides high tightness after sterilization, while retaining good value Mat, i.e. less than 15% (after sterilization) films with a thickness of 100 μm or less. In addition, the final composition can maintain strength at a high level, in particular the strength of the film in terms of energy damage.

Conclusions the present invention is that the polymer must include heterophase copolymer of propylene and an elastomer based on styrene with a fairly low styrene content. In addition, in accordance with the preferred example of domestic the present invention both of the component in the polymeric composition should have close values of the flow rate of the melt.

Accordingly, the present invention relates to a polymer, which includes

(a) heterophase copolymer of propylene (A), including in accordance with the preferred embodiment of the present invention

(A-1) a polypropylene matrix (a-1) and

(a-2) an elastomeric propylene copolymer (a-2)comprising at least one comonomer selected from the group which includes ethylene and alpha-olefins of the number of C4-C20and

(b) elastomer(s) based on styrene (),

where

(i) the mass content of styrene in each elastomer based on styrene (In) is equal to or less than 15%, and

(ii) the total mass content of the elastomer(s) on the basis of styrene (C) from the total amount of polymers in the polymer composition is in the range of 16.0 to 46,0%.

In accordance with a preferred embodiment of the present invention as an elastomer(s) based on styrene () is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

Accordingly, the present invention mainly relates to a polymer, which includes

(a) heterophase copolymer of propylene (A), including in accordance with the preferred embodiment of the present invention

(a-1) a polypropylene matrix a-1) and

(a-2) an elastomeric propylene copolymer (a-2)comprising at least one comonomer selected from the group which includes ethylene and alpha-olefins range From4-C20and

(b) elastomer(s) based on styrene (), which is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2),

where

(i) the mass content of styrene in each elastomer based on styrene (In) is equal to or less than 15%, and

(ii) the total mass content of the elastomer(s) on the basis of styrene (C) from the total amount of polymers in the polymer composition is in the range of 16.0 to 46,0%.

In accordance with the preferred embodiment of the present invention as an elastomer(s) on the basis of styrene (C) in the composition of the polymer is only a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2). Thus, in particular, it should be understood that as elastomers based on styrene (C) in the composition of the polymer is either a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1), or the hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

You should also understand that the heterophase copolymer of propylene (a) and the elastomer(s) on the basis of styrene (C) show the I only components of the polymer in the polymer composition.

In accordance with a preferred embodiment of the present invention into the polymer of the present invention as the sole polymer component includes

(i) heterophase copolymer of propylene (a) and

(ii) styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

Unexpectedly, it was found that films based on polymer compositions of the present invention demonstrate excellent tightness after sterilization, keeping the Mat at low levels. In addition, the strength of the above-mentioned films, in particular, in terms of energy damage, is increased in comparison with the strength of classical heterophase polypropylene (see Table 3).

Below is a more detailed description of the present invention.

As stated above, the polymer composition of the present invention consists of a mixture of heterophase propylene copolymer (a) and the elastomer(s) on the basis of styrene (i.e., in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl-isoprep (LIGHT) block elastomer (b-2).

The composition of the heterophase copolymer of propylene (A) of the present invention in addition includes propylene chem and alpha-olefin(s), for example, ethylene. In addition, in accordance with the preferred embodiment of the present invention, the structure of such a heterophase propylene copolymer (A) is a multiphase with a polypropylene matrix and inclusions, which include at least the elastomeric phase, i.e. amorphous propylene copolymer ("elastomer"), and possibly crystalline polyethylene. Usually such heterophase copolymer of propylene (A) receive as a result of a multistage process, for example, at least two-stage process, and in accordance with the preferred embodiment of the present invention three-stage process that leads to the formation of such heterophase system.

In accordance with a preferred embodiment of the present invention the polypropylene matrix (a-1) is isotactic. Accordingly, it should be understood that the polypropylene matrix (a-1) has a fairly high concentration pentabasic groups, i.e., greater than 90%, in accordance with the preferred embodiment of the present invention more than 92%, in accordance with still more preferred embodiment of the present invention more than 93%, and in accordance with more preferred example of implementation of the ia of the present invention more than 95%.

It should also be understood that the polypropylene matrix (a-1) not chemically modified, as it is known, for example, polymers with high melt strength. Thus, the propylene copolymer (A) is not structured (cross-linked). Characteristics of the elastic viscosity can also be improved when using the branched polypropylene, as described in EP 0787750, i.e. types of polypropylene with one branching (Y-polypropylene, from the main chain of the macromolecules which goes a long side chain, and architecture which resembles a "Y"). Such polypropylene characterized by a high melt strength. The branching index g' is a parameter of the degree of branching. The branching index g' is correlated with the number of branches of the polymer. The branching index g' is defined as follows

g'=[IV]br/[IV]linwhere g' is the branching index, [IV]brthe characteristic viscosity of the branched polypropylene, a [IV]linthe characteristic viscosity of the linear polypropylene having the same average molecular weight within the range of ±10%), and branched polypropylene. Thus, a low value of g' is an indicator of high branching of the polymer. In other words, if the reduction of g' increases branching of polypropylene. In randomcontent reference should be made to the work of such authors, as Him and Vahtokari in the Journal of chemical physics (..Zimm and W.H.Stockmeyer, J. Chem. Phys. 17,1301 (1949)). This document is in this case a link. Thus, in accordance with the preferred embodiment of the present invention, the branching index g' of the polypropylene matrix (a-1) must be at least 0,85, in accordance with the preferred embodiment of the present invention, at least about 0.90, and in accordance with more preferred embodiment of the present invention, at least 0,95 or, for example, 1,00,

In addition, as the polypropylene matrix (a-1) heterophase propylene copolymer (A) can be used, the propylene copolymer (a-1') or the propylene homopolymer (a-1). However, in accordance with the preferred embodiment of the present invention, the polypropylene matrix (a-1) is a propylene copolymer (a-1').

The expression of the propylene homopolymer used in the present invention refers to a polypropylene with a mass content of propylene molecules, at least 97%, in accordance with the preferred embodiment of the present invention, at least 98%, in accordance with the preferred embodiment of the present invention, but at least 99%, and the fit is shown another preferred embodiment of the present invention, at least 99,8%. In accordance with a preferred embodiment of the present invention in homopolymer propylene are only detected molecules of propylene. The content of the co monomer is determined using infrared spectroscopy with Fourier transform, as described in the examples below.

If the polypropylene matrix (a-1) is a propylene copolymer (a-1'), which, in particular, preferably, it includes at least one comonomer selected from the group which includes ethylene and alpha-olefins of the number of C4-C20and in accordance with the preferred embodiment of the present invention, at least one of comonomer selected from the group which includes ethylene and alpha-olefins range From4-C10for example, 1-butene or 1-hexene. In accordance with still more preferred embodiment of the present invention the propylene copolymer (a-1') is a copolymer of ethylene and propylene. The mass content of the co monomer, such as ethylene, propylene matrix (a-1) in this case, in accordance with the preferred embodiment of the present invention is relatively small and amounts to 5.0%, in accordance with the preferred embodiment of the present invention is from 0.2 to 5.0%, in accordance with still more the preferred embodiment of the present invention from 0.5 to 5.0%, in accordance with still more preferred embodiment of the present invention is from 1.5 to 5.0%.

The polypropylene matrix (A) can be unimodal or multimodal, e.g. bimodal molecular mass distribution and/or distribution of the content of the co monomer. However, in accordance with the preferred embodiment of the present invention the propylene matrix (A) is multimodal, in particular bimodal content of co monomer.

Used herein, the expression "multimodal" or "bimodal"refers to the modality of the polymer that is to form the curve of the molecular mass distribution, which is a graph of the fraction of molecular weight as a function of its molecular weight, or in accordance with the preferred embodiment of the present invention to the shape of the distribution curve of the content of the co monomer, which is a chart of the content of the co monomer as a function of molecular weight fractions of the polymer.

As will be explained below, the components of the polymer polypropylene matrix (A) can be obtained in a sequential stepwise process using successively installed reactors operating at different reaction conditions. As a consequence, each faction made otdelnom reactor, will have their own molecular weight distribution and/or distribution of the content of the co monomer.

When applying the curves of distribution of molecular weight or content of the co monomer) of these fractions with the aim of obtaining the curve of the molecular mass distribution curve or distribution of the content of the co monomer of the final polymer, the resulting curves can be a maximum of two or more, or, at least, these curves can be significantly wider in comparison with the curves for the individual fractions. Such a polymer obtained by two consecutive stages or more of their number, called bimodal or multimodal, depending on the number of clans.

Accordingly the propylene homopolymer (a-1) may be multimodal or bimodal, having a mean molecular weight distribution. In turn, the propylene copolymer (a-1') may be multimodal, e.g. bimodal, having in mind the content distribution co monomer and/or molecular weight distribution, in particular, it should be understood that the propylene copolymer (a-1') multimodal, such as bimodules, referring to the content distribution co monomer.

In addition, if the polypropylene matrix (a-1) multimodal, such as bimodally, referring, in particular, the content distribution co monomer should underst is th in this case, the individual fractions are present in quantities that affect material properties. Accordingly, it should be understood that the mass content of each of these fractions is equal to at least 10% of the propylene matrix (a-1). Accordingly, in the case of a bimodal system, referring, in particular, the content distribution co monomer, the ratio of these two fractions is 50:50. Thus, in accordance with the preferred embodiment of the present invention the polypropylene matrix (a-1) includes two fractions that differ from each other in a mass content of co monomer, for example ethylene, the content of the first fraction is 40 to 60%, and the second from 60 to 40%.

The various contents of the co monomer in these fractions is determined in the following paragraph in accordance with the preferred embodiment of the present invention.

Thus, in accordance with the preferred embodiment of the present invention, the polypropylene matrix (A) is a propylene copolymer (a-1')comprising at least two fractions with different content of co monomer. In accordance with the preferred embodiment of the present invention the propylene copolymer (a-1') comprises at least two fractions, in accordance with more prefer inim example implementation of the present invention consists of two fractions, the mass content of the co monomer in which, for example ethylene, is different, at least 2.0%, in accordance with the preferred embodiment of the present invention differs at least 2.5%. It has been unexpectedly discovered that such a bimodal distribution of the content of the co monomer improves the rate of Mat sterilized products. On the other hand, the difference in the mass content of the co monomer in these two fractions should not be too large, i.e. it should not be more than 6.0 per cent, and in accordance with the preferred embodiment of the present invention should not be greater than 5.0%, which will allow to avoid any tendencies of separation. Thus, it should be understood that the propylene copolymer (a-1') includes, but is at least two fractions, in accordance with the preferred embodiment of the present invention consists of two fractions, the mass content of the co monomer which differs in the range of from 2.0 to 6.0%, in accordance with the preferred embodiment of the present invention in the range from 2.5 to 5.0%. Thus, in accordance with one example implementation of the present invention the propylene copolymer (a-1') consists of a first fraction, which homopolymer propylene, and a second fraction, which is the copolymer p is cut with the contents of the co monomer, which in accordance with the preferred embodiment of the present invention is ethylene, but at least 2.0%, in accordance with the preferred embodiment of the present invention, at least 3.0% or such as at least 3.5%, or, for example, to 4.0%.

You should also understand that the polypropylene matrix (a-1) a relatively low rate of melt flow (MFR), that is quite a large molecular weight. The rate of melt flow mainly depends on the average molecular weight. This is due to the fact that long molecules slow down the flow of material, in contrast to short. The increase in molecular weight leads to a decrease in the value of MFR. The rate of melt flow (MFR) of the polymer extending through the head of the extruder at a certain temperature and under pressure, and when measuring the viscosity of the polymer, which affects mainly the molecular weight and degree of branching of the polymer, measured in g/10 min. Rate of flow of the melt, measured under a load of 2.16 kg at 230°C. (ISO 1133)is denoted as MFR2(230°C). Thus, in accordance with the preferred embodiment of the present invention, the MFR value2(230°C) propylene matrix (A) is less than 10.0 g/10 min, in accordance with more preferred is entrusted with the exemplary embodiment of the present invention is less than 8.0 g/10 min, in accordance with still more preferred embodiment of the present invention is less than 6.0 g/10 minutes

Another requirement of the present invention is that the heterophase copolymer of propylene (A) must include elastomeric propylene copolymer (a-2).

According to the present invention, the amount of elastomeric propylene copolymer (a-2) is determined by the amount soluble in cold xylene fraction of the total number of heterophase copolymer of propylene (A) minus the amount soluble in cold xylene fraction polypropylene matrix (a-1) [Elastomer - XCS (Total) - XCS (Matrix)].

Thus, it should be understood that the mass fraction soluble in cold xylene fraction heterophase propylene copolymer (a) is from 8.0 to 30.0, in accordance with the preferred embodiment of the present invention from 9.0 to 25.0%, and in accordance with more preferred embodiment of the present invention from 10.0 to 20.0%.

In addition, the mass fraction of the elastomeric propylene copolymer (a-2) in heterophase propylene copolymer (A) should be 3.0 to 25.0%, in accordance with the preferred embodiment of the present invention is from 4.0 to 20.0%, and in accordance with more preferred embodiment of the present invention is the t of 5.0 to 15.0%.

In accordance with a preferred embodiment of the present invention in the composition of the elastomeric propylene copolymer (a-2) should include propylene and at least one alpha-olefin of the number of C2-C20in accordance with the preferred embodiment of the present invention propylene and at least one alpha-olefin series With2-C10. In accordance with a preferred embodiment of the present invention in the composition of the elastomeric propylene copolymer (a-2) include propylene, and in accordance with the preferred embodiment of the present invention is composed of propylene and at least one of the co monomer alpha-olefins. selected from the group which includes ethylene, 1-butene, 1-penten, 1-hexene, 1-hepten and 1-est. In accordance with a preferred embodiment of the present invention in the composition of the elastomeric propylene copolymer (a-2) comprises at least propylene and ethylene, and may also include another alpha-olefin, as defined in this paragraph. However, in particular, in accordance with the preferred embodiment of the present invention in the composition of the elastomeric propylene copolymer (a-2) includes propylene and ethylene, and in accordance with the preferred embodiment of this image is placed it consists of propylene and ethylene, which are the only polymerized molecules. Thus, in accordance with the preferred embodiment of the present invention, the elastomeric propylene copolymer (a-2) is ethylene-propylene rubber (EPR).

As the propylene matrix (a-1) elastomeric propylene copolymer (a-2) can be unimodal or multimodal, e.g. bimodal. However, in accordance with the preferred embodiment of the present invention the elastomeric propylene copolymer (a-2) is unimodal. As to the definition of "unimodal" and "multimodal", for example, bimodal, it is given above.

Elastomeric propylene copolymer (a-2), in particular, is characterized by a relatively high number derived from propylene molecules. Estimated large number of molecules of propylene as in the matrix and the elastomeric phase provides sealing properties of the final material. As the elastomeric propylene copolymer (a-2) dominates soluble in cold xylene fraction heterophase copolymer of propylene (A) (mass fraction soluble in cold xylene fraction polypropylene matrix (a-1) is not more than 10%, and in accordance with the preferred embodiment of the present invention is not more than 8,0%), the number is about propylene soluble in cold xylene fraction heterophase propylene copolymer (a) is, at least 52%, in accordance with the preferred embodiment of the present invention, at least 58%, and in accordance with another preferred embodiment of the present invention, at least 63%. Accordingly, the mass content of an (other) alpha-olefin(s) number With2-C20i.e. excluding propylene, soluble in cold xylene fraction heterophase propylene copolymer (A) is less than 48%, in accordance with the preferred embodiment of the present invention less than 42%, and in accordance with another preferred embodiment of the present invention less than 37%. In accordance with a preferred embodiment of the present invention ranges mass content for an (other) alpha-olefin(s) number With2-C20i.e. excluding propylene, soluble in cold xylene fraction heterophase propylene copolymer (A) ranges from 48%to 10%, in accordance with the preferred embodiment of the present invention is from 40 to 15%. The above-mentioned values of the content of the co monomer are used, in particular, if the elastomeric propylene copolymer (a-2), where as co monomer is ethylene. In accordance with a preferred example of what westline of the present invention, the elastomeric propylene copolymer (a-2) is ethylene-propylene rubber (EPR), in particular, with such a content of propylene and/or ethylene, as defined in this paragraph.

Another important characteristic of the elastomeric propylene copolymer (a-2) is its relatively low characteristic viscosity. As stated above, the elastomeric propylene copolymer (a-2) dominates soluble in cold xylene fraction. Accordingly, if the elastomeric propylene copolymer (a-2) charakterizujme relatively low characteristic viscosity, it is reflected in the characteristic viscosity soluble in cold xylene fraction of the total number of heterophase propylene copolymer (A). Thus, in accordance with the preferred embodiment of the present invention are soluble in cold xylene fraction heterophase propylene copolymer (A) is equal to or lower than 4.0 DL/g, and in accordance with another preferred embodiment of the present invention is less than a 3.0 DL/g, in accordance with another preferred embodiment of the present invention is less than 2.5 DL/g, in accordance with another preferred embodiment of the present invention is less than 2.0 DL/g In accordance with a preferred embodiment of the present invention the characteristic viscosity is in the range from 1.0 to 3.0 DL/g, the accordance with another preferred embodiment of the present invention in the range from 1.5 to 2.5 DL/g According to ISO 1628 characteristic viscosity is measured in decaline at 135°C. Such low values of the characteristic viscosity provide inter alia the transparency of the final material.

However, it is only to understand what characteristic viscosity soluble in cold xylene fraction is too small, just has a predetermined relationship of viscosity soluble in cold xylene fraction to insoluble in cold xylene fraction heterophase propylene copolymer (A). This attitude reflects in the first approximation the ratio of the characteristic viscosity of the polypropylene matrix (a-1) and the elastomeric propylene copolymer (a-2) heterophase propylene copolymer (A). Characteristic viscosity soluble in cold xylene fraction and insoluble in cold xylene fractions according to ISO 1628 measured in decaline at 135°C.

Accordingly, it should be understood that the ratio of the characteristic viscosity soluble in cold xylene fraction and insoluble in cold xylene fraction (IV XCSsol/IV XCSinsol) is equal to or less than 1.0, and in accordance with the preferred embodiment of the present invention is equal to or less than 0,8. On the other hand, differences in viscosity should not be too large. Thus, in accordance with the preferred example of the implementation of the ia of the present invention, the ratio of the characteristic viscosity soluble in cold xylene fraction and insoluble in cold xylene fraction (IV XCS sol/IV XCSinsol) is from 0.5 to 1.0, in accordance with the preferred embodiment of the present invention from 0.6 to 0.9.

In addition, as described above, the relatively low rate of flow of the melt must be not only the propylene matrix (a-1), but also in heterophase propylene copolymer (A). Accordingly, it should be understood that MFR2(230°C) heterophase copolymer of propylene (A) less than 10.0 g/10 min, in accordance with the preferred embodiment of the present invention is less than 8.0 g/10 min, in accordance with the preferred embodiment of the present invention is less than 6.0 g/10 min, and in accordance with another preferred embodiment of the present invention is less than 4.0 g/10 min In accordance with a preferred embodiment of the present invention the lower limit value is 0.1 g/10 min, in accordance with the preferred embodiment of the present invention 0.5 g/10 min. So in accordance with a preferred embodiment of the present invention MFR2(230°C) heterophase propylene copolymer (a) is from 0.1 to 6.0 g/10 min, in accordance with the preferred embodiment of the present invention from 0.5 to 4.0 g/10 minutes

Styrene thermoplastic elastomer which is an additional essential component of the present invention. This additional component can be dispersed in heterophase copolymer of propylene (A). It was found that not any styrene thermoplastic elastomer suitable for the present invention, but only a certain class of such elastomers. Accordingly, the present invention should be used elastomer(s) based on styrene () with a fairly low styrene content equal to or less than 15%.

In accordance with a preferred embodiment of the present invention as an elastomer(s) based on styrene () can be used a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

Accordingly, it should be understood that the mass content of styrene elastomer based on styrene(s) (B), in accordance with the preferred embodiment of the present invention in a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), is equal to or less than 15%, in accordance with the preferred embodiment of the present invention is equal to or less than 14%, in accordance with another preferred embodiment of the present the invention is equal to or less than 13%. On the other hand, the mass content of styrene in ELA is the Tomer(s) based on styrene (), in accordance with a preferred embodiment of the present invention in a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), will not fall below 10%. Thus, in accordance with the preferred embodiment of the present invention, the range is from 10%to 15%, in accordance with the preferred embodiment of the present invention from 11 to 14% and in accordance with another preferred embodiment of the present invention from 11%to 13%.

It should also be understood that the flow velocity of the melt MFR2(230°C) of elastomer based on styrene(s) (B), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), intermediate value, i.e. maximum of 20.0 g/10 min, in accordance with the preferred embodiment of the present invention is not more than 10.0 g/10 min, in accordance with the more preferred an example implementation of the present invention is not more than 6.0 g/10 min. on the other hand, the flow velocity of the melt elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment, this is about the invention of a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), must not fall below 1.0 g/10 min Thus, in accordance with the preferred embodiment of the present invention, the range is from 1.0 to 20.0 g/10 min, in accordance with the preferred embodiment of the present invention from 3.0 to 10.0 g/10 min, in accordance with another preferred embodiment of the present invention from 3.0 to 6.0 g/10 minutes

In addition, the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2)can be identified by its density. Thus, it should be understood that the density of the elastomer based on styrene (C), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), less or equal to 0.900 g/cm3in accordance with the preferred embodiment of the present invention, this value is approximately 0,890 g/cm3.

Additional mandatory requirement of the present invention refers to the amount of elastomer(s) based on styrene (). As stated above, mass is e content of the elastomer(s) on the basis of styrene (C) in the polymer composition should be from 16 to 46%, in accordance with the preferred embodiment of the present invention is from 20 to 45%, in accordance with another preferred embodiment of the present invention from 26 to 45% of the total number of polymers in the invention, in accordance with the preferred embodiment of the present invention from the total number of heterophase propylene copolymer (A) and the elastomer(s) based on styrene (). If the styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2) are the only elastomers based on styrene (C) In the composition of the polymer, the ranges presented in this paragraph apply only to a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or the hydrogenated styrene-vinyl isoprene (LIGHT) block-elastomer (B-2).

In addition, it was found that the properties can be further enhanced if both the main component, i.e. heterophase copolymer of propylene (a) and the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), are consistent rate of flow of the melt. Accordingly, when edue to understand the ratio of MFR2(230°C) heterophase propylene copolymer (a) and elastomer based on styrene (C), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2), (MFR(A)/MFR(B)) is equal to or less than 1.0, in accordance with the preferred embodiment of the present invention is equal to or less than 0.9. On the other hand, differences in viscosity should not be too high. Thus, in accordance with the preferred embodiment of the present invention, the ratio of MFR(A)/MFR(B)is from 0.3 to 0.9, in accordance with the preferred embodiment of the present invention to 0.4 to 0.8.

In addition to the polymer components in the compositions of the present invention may include known additives, for example antioxidants. However, the mass content of these additives should not exceed 10.0%, in accordance with the preferred embodiment of the present invention should not exceed 8.0%, in accordance with the preferred embodiment of the present invention should not exceed 5.0 percent, in accordance with another preferred embodiment of the present invention should not exceed the odds of 4.0%, in accordance with another preferred embodiment of the present invention should not exceed 3.0% of the total composition of the polymer composition. In addition, the composition of this polymer compositions may include additional polymer components other than heterophase propylene copolymer (a) and the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention from a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2). However, in particular, in accordance with the preferred embodiment of the present invention in the mass composition of the polymer is less than 1.4%, in accordance with the preferred embodiment of the present invention is less than 1.0%, in accordance with another preferred embodiment of the present invention is less than 0.5% of polyethylene wax. In particular, in accordance with the preferred embodiment of the present invention, the wax is not explicitly present in the composition. As the polyethylene wax of the present invention uses any polyethylene having a melting point equal to or less than 140°C., and/or having srednekamennogo molecular weight Mn equal to or less than 100000. In particular, ka is este polyethylene wax according to the present invention is used (oxidized) polyethylene wax, having an acid number from 5 to 35 mg KOH/g, srednekamennogo molecular weight Mn of 1000 to 100000, and the melting point 92-140°C.

The present invention, in particular, relates to a polymer composition comprising as the sole polymeric component of the polymer composition heterophase copolymer of propylene (A) and the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

Thus it should be understood that the weight of the heterophase copolymer of propylene (a) and the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention is a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2)together is at least 60.0%of in accordance with the preferred embodiment of the present invention, at least 70.0%of, according to another preferred embodiment of the present invention, at least 80,0%, in accordance with another preferred embodiment of the present invention 90,0%, for example, 92,0%, in accordance with another preferable example of the m implementation of the present invention 95,0%, for example, 97,0% by weight of the polymer composition of the present invention.

It was found that the polymer composition of the present invention, as defined here, is suitable, in particular, to obtain thermovalve films. Thus, the present invention also relates to the use of the polymer composition, as defined in this invention, to obtain films, in particular sterilized or sterilized films, and/or containers, such as bags, in particular sterilized or sterilized containers, such as bags.

In addition, the present invention relates to a film, which includes a polymer. In accordance with the preferred embodiment of the present invention the polymer is a single polymer component in the film. In addition, as defined here, the present invention relates to a container including film and/or polymer. Container, in particular, may be a bag. In addition, in accordance with the preferred embodiment of the present invention mentioned container, that is, the bag is subjected to sterilization processing.

In addition, the present invention relates to a process for obtaining a polymer composition according to the present invention includes the following steps:

- p is the production of polypropylene matrix (a-1), in accordance with a preferred embodiment of the present invention of homopolymer propylene (a-1) or the propylene copolymer (a-1'), the components of this matrix,

- preparation of elastomeric propylene copolymer (a-2) and the dispersion of the elastomeric copolymer (a-2) in the propylene matrix (a-1) to obtain the heterophase copolymer of propylene (A), in accordance with the preferred embodiment of the present invention the elastomeric copolymer (a-2) is prepared in the presence of the polypropylene matrix (a-1)constituting the matrix, and dispersed in the matrix "on the spot" (a-1), and

- mixing mentioned heterophase propylene copolymer (A) with the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention with a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

In the present invention it is also proposed process for obtaining the above heterophase propylene copolymer (A). Elastomeric propylene copolymer (a-2) is mixed with the polypropylene matrix (a-1) after polymerization and is then mixed with the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present image is etenia with styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-Viper-isoprene (LIGHT) block elastomer (b-2). However, it is better if heterophase copolymer of propylene (A) get in a multistage process and then mixed with the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention with a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2). In particular, in accordance with the preferred embodiment of the present invention the polypropylene matrix (a-1) is at least one suspesion reactor or in slurry and gas-phase reactor, and then the elastomeric propylene copolymer (a-2) is at least one gas-phase reactor. Accordingly, the heterophase propylene copolymer (A) according to the present invention can generally be carried out in a cascade of up to four reactors, where the first reactor is a reactor for polymerization in bulk liquid polymer, which is in accordance with the preferred embodiment of the present invention is a loop reactor, the second reactor is a reactor for polymerization in bulk liquid polymer, which is in accordance with the preferred embodiment of the present invention is a loop or gas is asnam reactor and all subsequent reactors are gas-phase reactors, which are in accordance with the preferred embodiment of the present invention is a fluidized bed reactor. In the first two reactors are manufactured components such as kristallizuetsya the propylene homopolymers or copolymers with minor mass content of ethylene and/or other alpha-olefins (max 8%) (obtaining the matrix), while in the third reactor is mainly amorphous copolymer with a higher content of co monomer, and the component produced in the fourth reactor, is also, mostly, or an amorphous copolymer or a crystalline Homo - or copolymer of ethylene. According to a particular embodiment of the present invention can be used only three reactor to the second reactor installed in bypasses line, or unused fourth reactor. According to another specific embodiment of the present invention uses only the first and third reactors.

Described in more detail below process according to preferred embodiment of the present invention. This process includes the following steps:

(i) phase polymerization of propylene and possibly another (other) alpha-olefin(s) in the first reactor system is IU, include, in accordance with the preferred embodiment of the present invention a loop reactor for polymerization in bulk and possibly gas-phase reactor to obtain a polypropylene matrix (a-1);

(ii) a stage of transferring the obtained polypropylene matrix (a-1) the second reactor system, including in accordance with the preferred embodiment of the present invention, at least one gas-phase reactor;

(iii) phase polymerization of propylene and at least one alpha-olefin series With2-C20in the above-mentioned second reactor system in the presence of the polypropylene matrix (a-1) to obtain the elastomeric propylene copolymer (a-2), and

(iv) a step of mixing, in particular mixing of the melt of the material obtained with the elastomer(s) on the basis of styrene (C), in accordance with the preferred embodiment of the present invention with a styrene-ethylene-butylene-styrene (SEBS) block copolymer (B-1) and/or hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer (b-2).

Stages (i) and (iii) the sequence can be interchanged, that is, first may be made of elastomeric propylene copolymer (a-2), and then the polypropylene matrix (a-1). However, in accordance with the preferred embodiment of the present invention should cover anti adopted the above sequence of steps (i)-(iii).

The composition of the co monomer supplied in various reactors can be adapted to receive heterophase propylene copolymer (A) with the required properties, the number of co monomer must be determined by the specialist.

When using, as stated above, a loop reactor and at least one gas-phase reactor arranged in series and providing different conditions, it is possible to obtain a multimodal (e.g. bimodal) propylene matrix (a-1), referring, in particular, the content distribution co monomer, that is, referring to the distribution of the ethylene content.

Other details regarding the manufacture of heterophase propylene copolymers (FAILURE) can be obtained from the application WO 97/40080.

The used catalyst may vary from stage to stage, but in accordance with the preferred embodiment of the present invention in General, it remains unchanged. In particular, in accordance with the preferred embodiment of the present invention is used prepositionally heterogeneous catalyst.

As a catalyst for the preparation of heterophase propylene copolymer (A) in accordance with the preferred embodiment of the present invention uses a catalyst of Ziegler-Natta. Such systems can produce the RA Ziegler-Natta known and include such components as the catalyst, together acting as a catalyst and an external donor. The catalyst system catalyst contains, primarily, magnesium, titanium, halogen and an internal donor. Electronic control donors stereospecific properties and/or improve the system performance of the catalyst. There are many electron donors, including ethers, esters, polysilane, polysiloxane and alkoxy-silanes.

In accordance with a preferred embodiment of the present invention the catalyst as pronatalistic contains a compound of a transition metal. The compound of the transition metal is selected from the group which consists of titanium compounds with oxidation state 3 or 4, vanadium compounds, zirconium compounds, compounds cobalt compounds Nickel compounds tungsten and compounds of rare earth metals, trichloride titanium and titanium tetrachloride, which, in particular, is preferred.

In accordance with a preferred embodiment of the present invention are catalysts that can withstand prevailing in the loop reactor high temperature. The upper operating temperature limit of the conventional catalysts of the Ziegler-Natta for isotactic polymerization of propylene is approximately 80°C, above this temperature they are either deactivated, or eraut its stereoselectivity. Such a low temperature polymerization can in practice to impose a limit on the efficiency of the heat sink loop reactor.

In particular, in the application WO 2004/029112 disclosed commonly used solid components of catalyst. Thus, in particular, in accordance with the preferred embodiment of the present invention a solid component of catalyst was prepared in a process comprising: preparing a solution of magnesium complex in the reaction of magnesium-containing compounds, including the alkoxy group, with the electronic donor or its precursor in a liquid aromatic reaction medium With6-C10in the reaction mentioned magnesium complex with the composition, of at least one tetravalent metal 4-th group at temperatures above 10°C and below 60°C. to obtain an emulsion of a denser, not soluble in TiCl4/toluene dispersed in an oil medium phase with a molar ratio (metal 4-th group)/Mg, from 0.1 to 10 dispersed in the oil environment phase, with the molar ratio (metal 4-th group)/Mg of 10 to 100, with stirring, the emulsion may, in the presence of an emulsion stabilizer and/or an agent that minimizes turbulence to save the average droplet size mentioned dispersed phase in the range of 5 to 200 μm. The catalyst particles obtained after about the adoption of the above-mentioned particles dispersed phase upon heating. In the above-mentioned process before removing the solidified particles of alcinoe connection of aluminium by the formula AlR3-nXnwhere R is alkilirovanny group containing from 1 to 20, in accordance with the preferred embodiment of the present invention from 1 to 10 carbon atoms, X is halogen, and n takes the values 0, 1, 2 or 3 add and enter into contact with the drops of the dispersed phase of the mixed emulsion.

A solid component of catalyst used in this invention, receives the same way as in Example 8 application WO 2004/029112, except that aluminum compounds instead of triethylaluminum chloride was used diethylaluminium.

As described above, after the production of the heterophase copolymer of propylene (A) is mixed with the elastomer(s) based on styrene ().

Films made from the polymer composition can be produced in a known manner. For example, the film get on the extruder for the production of cast films. In particular, in accordance with the preferred embodiment of the present invention the pressure of the melt in the extruder is from 40 to 80 bar in accordance with the preferred embodiment of the present invention, the screw speed of the extruder is approximately 50 revolutions per minute, and the temperature is Kladusa rollers is approximately 15°C.

The following examples illustrate the present invention.

EXAMPLES

The measuring methods

1. Mw, Mn, MWD

Mw/Mn/MWD measured by means of gel chromatography (GPC) according to the following method:

The weighted average molecular weight (Mw) and molecular weight distribution (MWD=Mw/Mn, where Mn - srednekislye molecular weight, and Mw is the average molecular mass) was measured by the method according to ISO 16014-1:2003 and 16014-4:2003 ISO. The device Alliance GPCV 2000 company Vatera (Waters), equipped with a refractometric detector and on-line viscometer was used with 3 columns TSK-gel (GMHXL-HT) company TosoHaas, and as a solvent at 145°C and at a constant flow rate of 1 ml/minute was used 1,2,4-trichlorobenzene (TCB, stabilized with 200 mg/l 2,6-ditertbutyl-4-methyl-phenol). One analysis was introduced sample solution volume 216,5 µl. The speaker calibration was performed using standard 19 usadepartment MWD polystyrene (PS) in the range from 0.5 kg/mol to 11 500 kg/mol, and a set of known standard widely dispersed polypropylene. To obtain samples of the solution from 5 to 10 mg of polymer was dissolved in 10 ml (160°C) stabilized TCB (same as mobile phase) and kept for 3 h with continuous shaking before applying the sample to the GPC instrument.

2. The rate of melt flow (MFR)

The tip speed is of the melt was measured under a load of 2.16 kg (MFR 2) at 230°C. the flow Rate of the melt is the amount of polymer in grams which the test apparatus standardized according to ISO 1133, supersedes for 10 minutes at a temperature of 230°C. under load of 2.16 kg

3. The content of the co monomer

The mass content of the co monomer (%) was determined by one of the known methods based on infrared spectroscopy with Fourier transform (FTIR) with calibration13C-NMR.

4. Mass soluble in cold xylene fraction (XCS, %) Soluble in cold xylene fraction (XCS) was determined at 23°C according to ISO 6427.

5. Characteristic viscosity

Characteristic viscosity (IV) was determined according to ISO 1628-1 at 135°C with decaline as a solvent.

6. Energy of destruction, measured at 23°C

The fracture energy determines the strength and ability of a material to stretch. The normalized fracture energy WF/d [j/mm] can be interpreted as the total energy per 1 mm thickness, which film can absorb before it will collapse. The more this value is, the more viscous the material. The normalized fracture energy WF/d [j/mm] measured according to ISO 7765-2.

7. Measure the strength of the seam

The strength of the weld is measured by stretching the seam with a certain speed before breaking. Below is the procedure of measurement.

Two identical PP is Lenka welded together by the application of a certain temperature and a certain pressure for a certain period of time. In this case, the welding was carried out at two different temperatures (180°C and 220°C) with a force of 300 N for 0.5 sec.

Then measured the strength mentioned weld in tensile tests according to ISO 527 at 23°C, while the welded joint was fixed clamps. The clamps begin to move apart, and in this time causing load PA film/welded connection. The clips continue to move apart until you experience one or more of the following events:

(a) the film is torn near the welded joint (expected type of failure in this case) or

(b) welded connection is opened (so-called "effect easy opening" (peel-effect), this type of failure is not desirable for the material described in this invention).

During this measurement continuously recorded the following parameters:

(1) the Force with which the film has a resistance as a function of the actual elongation of the film. This force is recorded continuously, at every moment measurements get the actual elongation and tension, with which the film counteracts this extension.

The parameter "εbreak" (=elongation at break) is the length of the film relative to the initial length at the moment of rupture or welded connection. This length is given in % of the initial length of the specimen before the measured value was equal to 100%.

PA is amitr "Wbreak" (=work at break) is full of energy, which film/weld spent until rupture/welded joint (the area below the curve elongation-tension between elongation=10% (=initial length) and εbreak).

(2) Each measurement was performed on 10 welded joints. After measuring samples with a gap was estimated as belonging to the type of fracture (a) or (b). On our list we also report the values of "the effect of easy open", it means how many of the 10 samples exhibit undesirable type of failure (b). It is desirable that this value was as small as possible, ideally 0.

8. Melting point

The melting temperature Tm was measured using a differential scanning calorimeter (DSC) Mcttler TA820 on samples weighing from 5 to 10 mg, typically 8±0,5 mg of Curves of the melting temperature gain during heating from 30°C to 225°C at a heating rate of 10°C/min, the Sample is heated, cooled and then heated. The melting temperature was taken as the maximum of the second heating cycle.

9. Density

The density was determined according to ISO 1183.

10. The styrene content

The styrene content was measured on the basis of infrared spectroscopy with Fourier transform (FTIR). A thin film with a thickness of 300 μm is prepared from granulated material by hot pressing (190°C, 100 bar, 1 minute). From one sample turned out two films thus Prepared film samples was measured using an IR spectrometer Perkin-Elmer 2000 FTIR. The region of the peak absorption of the phenyl 1602 cm-1integrated and evaluated using established within the calibration curve. The result was taken as the average of two measurements.

The calibration. According to the above method were prepared with various connections polypropylene, consisting of PP and steroidogenesis elastomer (known styrene content), and they were used for measurement.

Preparation of samples for testing

a) Preparation of soluble Mg-complex

A solution of magnesium complex prepared by adding with stirring 78,0 kg of 20% solution of BOMAG (Mg(Bu)1,5(Oct)0,5) in toluene to 27,0 kg of 2-ethylhexanol in a 150-liter steel reactor. During retrieval solution temperature in the reactor is maintained below 40°C. After 30 minutes stirring, during which the reaction occurs, add 7.8 kg 1,2-phthaloyl-dichloride. After supplementation continued stirring for 60 minutes. After cooling to room temperature there was obtained a transparent yellowish solution.

b) Synthesis of catalyst

24,0 kg of titanium tetrachloride were placed in a 90-liter steel reactor. Then stirred the reaction mixture for 2 h was introduced 21,0 kg Mg-complex. During supplementation of Mg-complex temperature in the reactor podderjivaet is below 35°C. Then the reaction mixture at room temperature was injected 4.5 kg of n-heptane and 1.05 l additives Viscoplex 1-254 company RohMax Additives GmbH(polyalkyl methacrylate whose viscosity at 100°C is 90 mm2/s and a density at 15°C is about 0.90 g/ml), after which stirring was continued for another 60 minutes

Then the temperature of the reaction mixture was raised to 90°C for 60 min and maintained at this level for 40 minutes under stirring. After settling and siphonaria solid fraction was washed with a mixture of 30-preceptor chloride solution diethylaluminum in toluene (0,244 l) and toluene (50-kg) for 110 min at 90°C, n-heptane (50 kg) for 50 minutes at 50°C and n-heptane (50 kg) for 50 minutes at 25°C. the Synthesis was performed in an inert atmosphere at a pressure of about 1 bar.

Finally the reactor was injected 4.0 kg white oil (Primol 352; the viscosity of which at 100°C was 8.5 mm2/s; density at 15 °C was 0.87 g/ml). The resulting oil residue was stirred for 5 min at room temperature, and then the product was poured into a container for storage.

Analyzed the solid fraction from oil sludge mass, the content of which amounted to 22.2%. In the bulk composition of the solid catalyst is 0,23% aluminum, 15.4% of magnesium, and 4.5% titanium and 24.5% DOP (this text decryption no, apparently dioctylphthalate - approx. translator).

Hetero is asny the propylene copolymer (A) is carried out on the installation, equipped with a reactor prepolymerisation, a loop reactor and two gas-phase fluidized bed reactor, installed in series. Used as a catalyst, triethylaluminum (TEA) as a co-active catalyst and dicyclopentyl-dimethoxysilane (Donor D) as external donor.

After the first stage of prepolymerisation in a suspension reactor is fed a modified catalyst and the polymerization of homopolymer polypropylene as a matrix phase. The output slurry loop reactor installed the first gas-phase reactor, in which the copolymer is part of the matrix phase. The temperature of polymerization in suspesion loop reactor is 75,0°C, in the first gas-phase reactor 80,0°C. After transition to the second gas-phase reactor by copolymerization of propylene with a monomer (ethylene) is the dispersed phase of elastomer. The working temperature of the second gas-phase reactor is 70°C.

Between the loop reactor, the first gas-phase reactor and the second gas-phase reactor, the flow is as follows: 47%, 42%, 11%.

Heterophase copolymer of propylene (a) contains the unimodal elastomer.

(C) reaction Conditions

The preliminary polymerization:

T[°C]30
Tea/Donor [mol/mol]8
TEA/Ti [mol/mol]60
Thea/C3[g/kg]0,18

Loop reactor:

T [°C]75
Pressure [bar]55
Density [kg/m3]515
H2/S3[mol/KMOL]1,2
XCS [mass fraction, %]2,1

The first gas-phase reactor:

T [°C]85
Pressure [bar]22
H2/S3[mol/KMOL]12
With2/S3[mol/KMOL]23
XCS (loop+1-th gas-phase reactor) [mass fraction, %]7,0
IV (loop the howl+1-th gas-phase reactor) [DL/g] 2,9
C2 (loop+1-th gas-phase reactor) [mass fraction, %]2,0
MFR (2,16/230) (loop+1-th gas-phase reactor) [g/10 min]2,2

The second gas-phase reactor

T [°C]75
Pressure |bar]22
H2/C3[mol/KMOL]450
With2/S3[mol/KMOL]250
XCS (total mass content [mass %]13,3
IV (XCS - total mass content) [DL/g]1,7
C2 (total mass content [mass %]4,3
MFR (2,16/230) (total weight percent) [g/10 min]2,3

Mixing heterophase copolymer of polypropylene and elastomer based on styrene (C) in the molten state is performed in the extruder ZSK-57 dual auger. According E1-E5 and SE-SE of each polymer comp the flies get two cast film thickness of 100 μm on the extruder for the production of film extruder 30 PM) with a melting temperature of 240-280°C, when the pressure of the melt 40-80 bar, when the screw speed of the extruder at 50 rpm and the temperature of the cooling roll 15°C, which was connected by welding, as described above in the section "measuring the strength of the seam." Then measured the impact strength, the strength of the weld and work spent at break seam before and after sterilization. There have also been measuring the energy of destruction. The results are presented below.

Table 1
Properties of styrene-ethylene-butylene-styrene (SEBS) block copolymer, and hydrogenated styrene-vinyl isoprene (LIGHT) block elastomer
SEBS-1LIGHT-1
TypeKraton MD 6945Hybrar-731
styrene[wt.%]1312
MFR2(230°C)[g/10 min]3,5the 5.7
density[g/cm3]0,890/td> 0,890

Kraton MD supplied by the company Kraton, Polymers (Kraton Polymers LLC).

Hybrar 7311 supplied by the company Kuraray (Kuraray Co., LTD.).

Table 2
Properties of heterophase copolymer of propylene (FAILURE)
MatrixMatrixMatrixXCSJust RR
(FR)(FR)(total)(total)
TypePP-homoPP-SoroPP-Soro-FAILURE
Propylen[wt.%]10095,6986495,7
Ethylene [wt.%]04,42364,3
XCS[wt.%]2,1-7,0-13,3
IV[DL/g]--2,9*1,73**-
MFR2(230°C)[g/10 min]2,02,22,3
Tm[°C]----164

Table 3
Properties sample
SESE SEE1E2E4E5
FAILURE[wt.%]100858570557560
SEBS-1[wt.%]-15-3045--
LIGHT-1[wt.%]--15-2540
Matte[%]13,28,9the 10.16,03,37,65,2
Matte after sterilization[%]16,2 13,215,1the 10.16,113,314,5
The seam elongation at break[%]380423477434505505580
The seam elongation at break[%]684295156284163227
Toughness sterile-
series
film
[J/mm]24,932,935,4of 31.835,535,735,1
Tm[°C]163,8164,4163,3162,3
AHm[J/g]109,175,063,851,9
FR - faction
PP - homo - Homo-polymer of propylene
PP - Soro - statistical copolymer of ethylene and propylene
The NON - heterophase copolymer of propylene
XCS (total) - soluble in cold xylene fraction FAILURE
* the characteristic viscosity is not soluble in cold xylene fraction
** - characteristic viscosity soluble in cold xylene fraction

1. Polymer composition intended for the manufacture of medical packaging, which includes
(a) heterophase copolymer of propylene (A), which includes
(a-1) a polypropylene matrix (a-1) and
(a-2) an elastomeric propylene copolymer (a-2)comprising at least one comonomer selected from the group which includes ethylene and the LLF-olefin series With 4-C20and
(b) elastomer(s) based on styrene (),
where
(i) the mass content of styrene in each elastomer based on styrene (In) is equal to or less than 15%, and
(ii) the total mass content of the elastomer(s) on the basis of styrene (C) from the total amount of polymers in the polymer composition is in the range of 16.0 to 46,0%,
the ratio of the flow rate MFR2(230°C) heterophase copolymer of propylene (A) to the flow rate MFR2(230°C) of elastomer based on styrene () (MFR2(230°C) (A)/MFR2(230°C)(V))≤1,0.

2. Polymer composition according to claim 1, characterized in that the elastomer(s) on the basis of styrene (C) use (a) a styrene-ethylene-butylene-styrene (SEBS) block copolymer(s) (B-1) and/or (and) hydrogenated styrene-vinyl isoprene (SIS) block elastomer(s) (b-2).

3. Polymer composition according to claim 1 or 2, characterized in that the elastomer(s) on the basis of styrene (C) in the composition of the polymer part(s) only (a) styrene-ethylene-butylene-styrene (SEBS) block copolymer(s) (B-1) and/or (and) hydrogenated styrene-vinyl isoprene (SIS) block elastomer(s) (b-2).

4. Polymer composition according to claim 1 or 2, characterized in that the composition of the heterophase copolymer of propylene (A) is soluble in cold xylene fraction, mass fraction which is 8 ÷ 30%.

5. Polymer composition according to claim 1 or 2, characterized in that the solution is in my cold xylene fraction heterophase copolymer of propylene (A) the mass content derived from propylene molecules is at least 52%.

6. Polymer composition according to claim 1 or 2, characterized in that the characteristic viscosity soluble in cold xylene fraction heterophase propylene copolymer (A) is equal to or lower than 4.0 DL/g

7. Polymer composition according to claim 1 or 2, characterized in that the ratio of the characteristic viscosity soluble in cold xylene fraction heterophase copolymer of propylene (A) to the characteristic viscosity insoluble in cold xylene fraction heterophase copolymer of propylene (A) (IV XCSsol/IV XCSinsol)≤l,0.

8. Polymer composition according to claim 1 or 2, characterized in that the polypropylene matrix (a-1) is at least bimodal content of co monomer.

9. Polymer composition according to claim 1 or 2, characterized in that the polypropylene matrix (a-1) is a propylene copolymer (a-1'), comprising at least one comonomer selected from the group which includes ethylene and alpha-olefin series With4-C20.

10. Polymer composition according to claim 9, characterized in that the mass content of the co monomer in the copolymer of propylene (a-1') must not exceed 5.0 percent.

11. Polymer composition according to claim 9, characterized in that the propylene matrix (a-1) includes
(i) from 40 to 60% of the first fraction, which is the polymer of propylene, and in accordance with preferred when the leader of the implementation of the present invention homopolymer propylene, and
(ii) from 60 to 40% of the second fraction, which is a statistical copolymer of propylene,
the content of co monomer in the first fraction and the second fraction is different, at least 2.0%.

12. Polymer composition according to claim 1 or 2, characterized in that the polypropylene matrix (A-1) used in the propylene homopolymer (a-1).

13. Polymer composition according to claim 1 or 2, characterized in that the flow velocity of the melt MFR2(230°C) heterophase propylene copolymer (A) is less than 4.0 g/10 minutes

14. Polymer composition according to claim 1 or 2, characterized in that the flow velocity of the melt MFR2(230°C) of elastomer based on styrene (In) less than 6.0 g/10 minutes

15. Polymer composition according to claim 1 or 2, characterized in that the density of the elastomer(s) on the basis of styrene (b) less to 0.900 g/m3.

16. The film, which includes a polymer composition according to any one of the preceding paragraphs.

17. The film according to item 16, wherein the film is subjected to sterilization processing.

18. The container is intended for manufacture of medical packaging, including a film on P16 and/or polymer composition according to any one of claims 1 to 15.

19. The container p, characterized in that the container is subjected to sterilization processing.

20. A method of obtaining a polymer composition according to one of claims 1 to 15, comprising the following steps:
prigotovleniya polypropylene matrix (a-1), part of this matrix,
preparation of elastomeric propylene copolymer (a-2) and the dispersion of the elastomeric copolymer (a-2) in a matrix of polypropylene copolymer (a-1) to obtain the heterophase copolymer of propylene (A), and then
mixing mentioned heterophase propylene copolymer (A) with the elastomer(s) based on styrene ().

21. The method according to claim 20, wherein the elastomeric copolymer (a-2) are obtained in the presence of the polypropylene matrix (a-1)constituting the matrix, and it is dispersed in the matrix "in situ".

22. The use of a polymer composition according to one of claims 1 to 15 for the preparation of sterilized or sterilized films and/or containers.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a rubber composition for use in a mixture with impact-resistant plastic, a method of preparing a mixture of polymer composition and impact-resistant plastic, as well as a composition of impact-resistant plastic. The rubber composition for use in a mixture with impact-resistant plastic contains a polymer obtained by polymerising at least one conjugated diene in the presence of an anionic initiator and a viscosity-reducing additive. Said polymer contains carboxylate terminal groups formed by adding carbon dioxide to break polymerisation chains and has Mooney viscosity ML1+4 greater than approximately 35 and solution viscosity X, where X is greater than approximately 75 cP. The viscosity-reducing additive has polymer solution viscosity from X to 0.4X-0.58X.

EFFECT: obtaining polymers with improved strength properties for use in impact-resistant plastic, as well as use of an additive which reduces polymer solution viscosity while maintaining high bulk viscosity.

28 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer chemistry, particularly to novel block copolymer compositions and methods of preparing said compositions. The novel block copolymer compositions are particularly suitable for making articles by moulding or extrusion. The block copolymer composition contains 100 pts.wt solid block copolymer obtained via anionic polymerisation and 5-250 pts.wt plasticising modifier. The block copolymer contains at least two blocks A and at least one block B. Block A is a monoalkenylarene block, block B is selected from polymer blocks containing at least one conjugated diene and at least one monoalkenylarene and having random or controlled distribution. The plasticising modifier contains a conjugated diene and has a structure similar to the structure of block B of said block copolymer. The plasticising modifier is synthesised and/or treated together with the block copolymer in situ to obtain a homogeneous mixture of modifier and block copolymer.

EFFECT: jointly prepared mixtures of modifying plasticisers and block copolymers are characterised by higher breaking and tearing strength compared to similar mixtures containing oil, as well as higher plasticity without considerable deterioration of processability.

17 cl, 1 dwg, 7 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: composition contains (a) 100 pts.wt solid selectively hydrogenated block-copolymer, having general formula A-B-A, (A-B)nX, where n varies from 2 to 3, and (b) 5-250 pts.wt hydrogenated plastification modifier which contains at least one hydrogenated conjugated diene selected from isoprene, 1,3-butadiene and mixtures thereof. Before hydrogenating the block-copolymer, each block A is a monoalkenylarene polymer block and each block B is a conjugated diene block. Each block A has average molecular weight varying from 3000 to 60000, and each block B has average molecular weight varying from 30000 to 300000. The total amount of monoalkenylarene in the hydrogenated block-copolymer ranges from 20 to 80 wt %. The plastification modifier is characterised by content of vinly groups (V2) before hydrogenation such that the ratio V2/V1 lies between 0.8 and 1.2. The ratio (MW2)/(MW1) of the average molecular weight of said plastification modifier (MW2) to the average molecular weight of block B (MW1) ranges from 0.01 to 0.3, with minimum molecular weight (MW2) 2000 and maximum molecular weight (MW2) 13000. The plastification modifier is further characterised by a polydispersity index (PDI). If PDI of said plastification modifier lies between 1.0 and less than 1.5, then the average molecular weight of said plastification modifier lies between 2000 and 7000. If PDI lies between 1.57 and 1.7, then the average molecular weight lies between 6800 and 13000.

EFFECT: considerably high breaking stress and improved compressions set of block-copolymer compositions, which enables to obtain compositions with low volatility at given hardness, as well as improved organoleptic properties, improved fogging characteristics and low level of extraction.

24 cl, 14 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: moulded article is made from a polymer composition containing 99-30 pts.wt cyclic olefin polymer (A); and 1-70 pts.wt soft copolymer (B) obtained through polymerisation of at least two monomers selected from a group consisting of olefins, dienes and aromatic vinyl hydrocarbons and having glass transition temperature not higher than 0°C. Said polymer composition also contains 100 pts.wt of the total amount of cyclic olefin polymer (A) and soft copolymer (B), 0.001-1 pts.wt radical initiator (C), 0-1 pts.wt polyfunctional compound (D) containing two or more radically polymerisable functional groups in a molecule, and 0.5-10 pts.wt nonionic or anionic antistatic additive (E). The moulded article, particularly a container, is used for work in pure production facilities when producing articles such as cassettes for semiconductor wafers.

EFFECT: moulded articles having high wear and impact resistance can be made from the polymer composition.

16 cl, 3 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: glass-like blocks contain 25-50 mol % alpha-methylstyrene and have glass transition temperature ranging from 120 to 140°C. Polymerisation is carried out at temperature from 35 to 60°C, and relatively high content of solid substance while continuously adding styrene, which leads to high degree of conversion of alpha-methylstyrene. The invention also describes elastomeric compositions with high operating temperature, containing a block-copolymer and an olefin polymer or a copolymer, a selectively hydrogenated elastomeric block-copolymer and an article made therefrom, which is a film, fibre, nonwoven film or multilayer sheet.

EFFECT: improved characteristics.

25 cl, 1 dwg, 9 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to novel compositions containing (a) anionic block-copolymers of monoalkenylarenes and conjugated dienes, where one of the blocks is characterised by controlled distribution of monomer links of the copolymer of conjugated diene and monoalkenylarene and demonstrates specific assembly of monomers in the copolymer block, and (b) special-purpose softening modifiers having a specific structure. The invention also discloses methods of preparing said novel compositions and different versions of final use and field of using said compositions.

EFFECT: improved fluidity, reduced hardness, improved stress relaxation characteristics of the polymer compositions, which makes them especially attractive for use in personal hygiene purposes where nonwoven materials, elastic films and fibres are used.

36 cl, 11 ex, 12 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: composition contains from 30 wt % to less than 50 wt % propylene-alpha-olefin copolymer and from more than 50 wt % to 70 wt % styrene block-copolymer. The propylene-alpha-olefin copolymer has at least 70 wt % links formed from propylene, and from 10 to 25 wt % links formed from C2- or C4-C10-alpha-olefin and has heat of fusion less than 37 J/g and melt flow index from 0.1 to 100 g/10 min. The composition has modulus of elasticity in tension less than 20 MPa, ultimate tensile stress of at least 5 MPa and elongation at failure of at least 900% and low relative instantaneous shrinkage.

EFFECT: composition has good physical properties such as elasticity and flexibility, and can also be easily processed using traditional equipment for processing polyolefins.

21 cl, 8 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a composition of a hot melt pressure-sensitive adhesive (HMSPA), a laminated system and a pressure sensitive label containing said adhesive. The HMSPA composition contains: a) 30-50% mixture of styrene diblock- and triblock-copolymers, total content of the styrene monomer in the said mixture between 14 and 40%; b) 40-55% tackifying resin with melting point between 70 and 150°C, obtained through hydrogenation, polymerisation or copolymerisation of mixtures of aliphatic unsaturated hydrocarbons containing approximately 5, 9 or 10 carbon atoms; c) 4-20% hydrocarbon coil containing less than 15% aromatic compounds; d) 1-6% filler selected from calcium carbonate or a homopolymer or a copolymer polyethylene with low molecular weight. The laminated system includes an adhesive layer consisting of HMPSA and a paper front material. The pressure sensitive label is made from the laminated system.

EFFECT: HMPSA composition provides low susceptibility to decolouration during storage of articles.

15 cl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of shrinkable polymer labels, particularly to preparation of a film composition. The composition contains (a) a high-impact polystyrene component (HIPS) with a block-copolymer grafted to the polystyrene, (b) 10-50 wt % general purpose polystyrene (GPPS) and (c) approximately 2-80 wt % styrene block-copolymer. Component (a) contains a grafted rubber component which is a styrene block-copolymer and a rubber-like diene with conjugated double bonds from 1 to 7 wt % of the weight of the HIPS; less than 10 wt % concentration of gel, defined by extraction of the methylethylketone/methanol mixture. The average particle size of the rubber is less than 1 mcm and 0.01 mcm or more. Approximately 40-90 vol % of the rubber particles have diametre approximately less than 0.4 mcm and approximately 10-60 vol % of the rubber particles have diametre of approximately 0.4-2.5 mcm. Most of the rubber particles have a nucleus-shell morphology and said particles are in concentration of 10-70 wt % of the total weight of the polymer composition, and 1-5 wt % of the rubber-like diene of the total weight of the polymer composition.

EFFECT: film made from said composition has ratio of directed length to non-directed length in the direction of the greatest drawing at least equal to 3:1 and enable increase in size by 20% in the direction of less stretching at 110°C.

10 cl, 3 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: described is a composition of bound high molecular weight block copolymers for making compounds, moulded articles and oil gels, containing: (a) a linear di-block copolymer (I) of general formula (A-B), having maximum apparent molecular weight between 230000 and 275000, (b) a linear double-beam block copolymer (II) of general formula (A-B)2X, (c) a three-beam block copolymer (III) of general formula (A-B)3X, (d) greater than the three-beam block copolymer (IV) of general formula (A-B)n>3X, (e) secondary polymer structures mainly based on monovinylaromatic hydrocarbons having maximum apparent molecular weight less than that of the linear di-block copolymer (I), where A is a block of mainly poly(monovinylaromatic hydrocarbons), and where content of poly(monovinylaromatic hydrocarbons) lies between 20 and 35 wt %; where B is a block of mainly poly(conjugated diene); where X is a residue of a trifunctional and/or tetrafunctional binding agent; where the composition of block copolymers has weight-average molecular weight Mw between 450000 and 800000, and where relative amounts of block copolymers are as follows: I between 5 and 15 wt %; II and III together between 70 and 90 wt %, where III is more than 10 wt %; IV ranges from more than 0 to less than 10 wt % and secondary polymer structures range from more than 0 to less than 10 wt %, respectively, relative the weight of the all the composition of block copolymers, in which the sum of the components is equal to 100%. The invention also describes a method of obtaining the composition of bound block copolymers. Described also are moulded articles and gels, obtained from the composition of bound block copolymers.

EFFECT: obtaining a composition of bound block copolymers with high molecular weight and low viscosity.

12 cl, 13 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing granular foamed compositions based on vinyl aromatic compounds and can be used in making articles from foam plastic. The foamed composition contains a polymer matrix selected from a copolymer containing 90-99.995 wt % of at least one vinyl aromatic monomer and 0.005-10 wt % salt or C1-C4 alkyl ether of styrenesulphonic acid; or a polymer mixture containing 92-99.995 wt % vinyl aromatic (co)polymer and 0.005-8 wt % of a product selected from a salt or C1-C4 alkyl ether of styrenesulphonic acid and a copolymer of styrene and a salt or C1-C4 alkyl ether of styrenesulphonic acid; 1-10 wt % with respect to weight of the polymer matrix of the foamed additive selected from aliphatic or cycloaliphatic hydrocarbons containing 3-6 carbon atoms, or mixtures thereof, halogenated derivatives of aliphatic hydrocarbons containing 1-3 carbon atoms, and carbon dioxide. Foamed beads, foamed articles and methods of producing granular foamed compositions in an aqueous suspension or in a mass are also described.

EFFECT: obtaining foamed granules having low density and low electrostatic charge.

9 cl, 9 ex

FIELD: chemistry.

SUBSTANCE: composition contains from 30 wt % to less than 50 wt % propylene-alpha-olefin copolymer and from more than 50 wt % to 70 wt % styrene block-copolymer. The propylene-alpha-olefin copolymer has at least 70 wt % links formed from propylene, and from 10 to 25 wt % links formed from C2- or C4-C10-alpha-olefin and has heat of fusion less than 37 J/g and melt flow index from 0.1 to 100 g/10 min. The composition has modulus of elasticity in tension less than 20 MPa, ultimate tensile stress of at least 5 MPa and elongation at failure of at least 900% and low relative instantaneous shrinkage.

EFFECT: composition has good physical properties such as elasticity and flexibility, and can also be easily processed using traditional equipment for processing polyolefins.

21 cl, 8 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: described is a dispersion composition which is in form of an oil based suspension containing the following in wt % (per total weight of the dispersion composition): plant oil 50-90, UV-light absorber 0.001-0.1, bactericidal agent 0.001-0.1, ultrahigh molecular α-olefin-styrene polymer which lowers liquid flow resistance 5-40 and lubricant 2-25. To obtain the dispersion composition, the UV-light absorber and bactericidal agent are added to plant oil and a first mixture is obtained. The mixture is stirred to homogeneous state for use as a dispersant. The lubricant is then added to the polymer and a second mixture is obtained. The second mixture is crushed at temperature equal to lower than -90°C. The obtained powder is added to the dispersant and the mixture is stirred to obtain a suspension.

EFFECT: obtaining high content of dry composition substance, improved stability of the composition with the polymer.

14 cl, 7 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: elastomeric polymer moulding composition can be used for making capacitor insulating layers, medical devices and fuel element seals. An elastomeric polymer moulding composition is described, which contains an elastomeric polymer, which can be cured by peroxide, is completely soluble (i.e. does not contain gel), does not contain divinyl benzene and extracting impurities. Material made based on the said composition is safe during production and use. The composition is an alternative to XL-10000 based compositions (butyl rubber, partially cross linked with divinyl benzene).

EFFECT: increased effectiveness of the composition.

7 cl, 1 tbl, 5 ex, 2 dwg

FIELD: chemistry.

SUBSTANCE: described is a foaming polystyrene composition in form of granules, containing: (1) 100 pts. wt polystyrene, preferably with average molecular weight Mw ranging from 150000 to 400000 Da, (2) 3 to 20 pts. wt of foaming agent, which is water or a mixture of water and at least one other foaming agent, for example, hydrocarbon, (3) 0.1 to 12 pts. wt of at least one modified clay, with at least a partial lipophilic property. Also described is a method of producing a foaming polystyrene composition in form of granules, which involves polymerisation of styrene and optionally at least one comonomer, which is brought into an aqueous suspension and mixing by reacting 100 pts. wt styrene and optionally a comonomer or comonomers with at least one radical polymerisation initiator and at least one suspension agent. This method is characterised by that, the reaction process is also carried out in the presence of (a) 4 to 23 pts. wt of foaming agent, which is water or a mixture of water and at least one other foaming agent, for example hydrocarbon foaming agent, and (b) 0.5 to 12 pts. wt of at least one modified clay, with at least a partial lipophilic property. Described also is use of the said foaming polystyrene composition in form of granules in making moulded and foamed objects, preferably with bulk density ranging from 5 to 50 kg/m3, preferably from 5 to 30 kg/m3.

EFFECT: increased effectiveness of the composition.

17 cl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention refers to technology of hull-kernel particles which can be used to modify impact strength of poly(met)akrylate moulding compositions. According to method a) water and emulsifier b) are added with 25.0 to 45.0 mass fractions of the first composition containing A) alkylmetacrylate 50.0 to 99.9 mass fractions, B) alkylakrylate 0.0 to 40 mass fractions, C) cohesive monomers 0.1 to 10.0 mass fractions, and D) styrene monomers 0.0 to 8.0 mass fractions, and polymerised, c) added 35.0 to 55.0 mass fractions of the second composition containing E) (met)akrylates 80.0 to 100.0 mass fractions, F) cohesive monomers 0.05 to 10.0 mass fractions, and G) styrene monomers 0.0 to 20.0 mass fractions, and polymerised, d) added 10.0 to 30.0 mass fractions of the third composition containing H) alkylmetakrylates 50.0 to 100.0 mass fractions I) alkylakrylates 0.0 to 40.0 mass fractions and J) styrene monomers 0.0 to 10.0 mass fractions, and polymerised. Method is distinctive in that e) each polymerisation cycle is performed at temperature within 60 to 90°C and f) fractional content of all substances is selected so that total weight A) to J) per total weight of aqueous dispersion exceeds 50.0 mass %. Presented method is used to produce impact strength modifiers minimum content of which provides sufficient improvement of impact strength when tested on cut moulding composition samples, not degrading at the same time other important properties of moulding composition.

EFFECT: production of impact strength modifiers minimum content of which provides sufficient improvement of impact strength when tested on cut moulding composition samples, not degrading at the same time other important properties of moulding composition.

17 cl, 8 tbl

FIELD: manufacture of rubber articles on base of butadiene styrene rubber; manufacture of ebonite battery monoblocks.

SUBSTANCE: ebonite mix on base of butadiene styrene rubber contains reclaim, sulfur, diphenyl guanidine, magnesium oxide, kaolin, paraffin, phthalic anhydride with synthetic fatty acid, soap-surfactant, petrolatum oil and filler. Used as filler is ion-exchange resin -cationite KY-2 ground preliminarily to fraction of 1-40 mcm and taken in the amount of 180-360 parts by mass.

EFFECT: improved physico-mechanical parameters of vulcanizers; reduction of deficiency of rubber phase in ebonite; utilization of used ion-exchange resins.

2 tbl

FIELD: textile industry.

SUBSTANCE: invention relates to manufacture of nonwoven fabrics possessing sorption ability and can be used in making various-modification filters suitable for cleaning liquid media. Impregnating composition contains blend constituted by latexes based on rigid chain- and flexible chain-nature copolymers taken at ratio between 95:5 and 50:5, respectively, solid filler, and water, wherein ratio of all components is expressed as 1:(2.5-3.0):1. Composition is obtained by mixing and vibration action in resonance mode at frequency 50-150 Hz and action time 5-15 min.

EFFECT: increased aggregative stability of composition and physicomechanical properties of material with no additional components added.

2 cl, 2 tbl, 6 ex

The invention relates to compositions for bonding, sealing and performance of coatings on the basis of a copolymer of styrene, which is suitable as a binder in obtaining adhesives, coatings and masses jointing

The invention relates to thermoplastic molding mass containing 20-90 wt.h

FIELD: chemistry.

SUBSTANCE: invention relates to a copolymer of propylene and 1-hexene, a method of producing said copolymer and use thereof to make pipes. Described is a propylene copolymer (A), which contains at least 1-hexene as a comonomer with weight content in the range of 1.0-3.0 wt % with partial crystallisation in a β-modification. Weight content of the fraction dissolved in xylene is equal to or less than 2.5 wt %. Described also is a propylene copolymer (A) which contains a β-nucleating agent (B).

EFFECT: improved balance between rigidity, impact resistance and slow crack growth characteristics.

17 cl, 5 tbl, 4 ex

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