Polymeric olefinic composition for caps for bottles (options), cover made of it, the method of obtaining such cover, bottle, close this cover

 

The invention relates to caps for bottles, made of olefin polymer resins, in particular to screw caps for bottles. Olefin polymer composition comprises from 90 to 100 wt.% crystalline propylene homopolymer or statistical copolymer of propylene and C2-C10-olefins and from 0 to 10 wt.% elastomeric copolymer of ethylene and C3-C10-olefin. Moreover, the crystalline propylene homopolymer or a statistical copolymer of propylene contains at least 94 wt.% the fraction soluble in xylene at room temperature. Elastomeric copolymer contains from about 40 mol. % to 85 mol.%. Olefin polymer composition is characterized by the value of the modulus of elasticity in bending at 23°C at least equal to 1620 MPa, the value of the yield strength at 23°C at least equal to 33 MPa, and the value of impact strength Izod at 0°C for at least 2.5 kJ/m2. The composition of the invention suitable for use in contact with food and drinks and the cover obtained from such compositions can be subjected to thermal treatments, in particular, cycles of pasteurization. 7 C. and 7 C.p. f-crystals, take 2 tablets in the new polymer resins. In particular, it relates to screw caps for bottles.

The use of thermoplastic olefin polymer resins for the manufacture of caps for bottles in itself known. In particular, it is known the use of propylene homopolymer and high density polyethylene.

Caps for bottles made of these polymers, all over the world are widely used, for example, in industry beverage. However, their use is limited due to the fact that the bottles with these covers may not be subjected to thermal treatments at high temperatures, such as pasteurization cycles in harsh conditions at 80-90C. Pasteurized polyolefin cover described in the patent UK 1387556. In accordance with this patent covers for bottles can withstand temperatures up to 75C.

Currently, there is a need for pasteurization of beverages in bottles at higher temperatures. Examples of drinks that could be pasteurized include soft drinks, in particular, cider, fruit juices and some sodas. Currently, it is advisable to hold a series of posterization 88C. Time pasteurization is typically in the range from 10 to 50 minutes, more often 10-30 minutes.

Due to poor mechanical properties, in particular, expressed in heat resistance and creep resistance, olefin polymers used to date, the lid during the cycle pasteurization can not withstand the high pressure of the contents inside the bottle. As a consequence, during the pasteurization cycle, there is a tendency for leakage of gas and liquid, and can even occur disruption of the lids.

Suddenly, in the present invention it was found that the cover for bottles, made of some polypropylene, can be subjected to thermal treatments at high temperatures, in particular, cycles of pasteurization. Thus, caps for bottles of the present invention can withstand thermal processing, in particular, pasteurization, when referred to a high temperature without the occurrence of defects. In particular, overcome the problem of brittleness. Thus, currently it is possible to pasteurized bottles with lids of the propylene polymer of the present invention at temperatures in excess of 75With, and for a relatively long assisa still.

In addition to the above caps for bottles of the present invention do not undergo any deformation at high temperatures.

Moreover, the types of polymers selected for the manufacture of caps for bottles of the present invention, suitable for use in contact with food and beverages.

Thus, the object of the present invention is a cap for bottles, comprising or essentially made of olefin polymer composition (A) containing:

1) 90-100 wt.%, preferably 92-98, more preferably 94-98, crystalline propylene homopolymer or statistical copolymer with co monomer selected from ethylene and C4-C10-olefin; and the said polymers contain at least 94 wt.%, preferably at least 96% of a fraction soluble in xylene at room temperature (polymer (1)); and

2) 0-10 wt.%, preferably 2-8%, more preferably 2-6% of an elastomeric copolymer of ethylene with propylene or With4-C10-olefin or mixtures thereof, and optionally with a diene content of diene in the range from 0.5 to 10 wt.%, moreover, the aforementioned elastomeric copolymer contains from 40 to 85 mol.% E. which of the above random copolymers.

Polymer composition (A) is usually characterized by the value of the modulus of elasticity in bending (FM) at 23With at least equal 1620 MPa, preferably in the range from 1650 to 2500 MPa; the value of the yield strength at 23With at least equal to 33 MPa, preferably up to 45 MPa; and the value of impact strength Izod when 0With at least 2.5 kJ/m2preferably up to 20 kJ/m2.

Mentioned polymer composition (A) is characterized by the value of resistance at the Vic, is approximately equal to at least 150With, preferably 155With up to 160C.

Methods of measuring the above-described properties and content insoluble in xylene fraction in this document are described below.

Preferably the polymer (1) is a propylene homopolymer. If the polymer (1) used are copolymers, the preferred copolymers of propylene with co monomer selected from ethylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene and 1-octene. The most preferred comonomers are ethylene and butene-1. The content of comonomers usually have titsa in the range from 0.3 to 100 g/10 min, preferably 0.7 to 30 g /10 min, more preferably 1-15 g/10 min.

A suitable example of the above-mentioned polymer (1) is a crystalline propylene polymer with a broad molecular weight distribution (hereafter in this document referred to the polymer (1)), as expressed through the ratio of. A propylene homopolymer is preferred.

Typically, the polymer (1) is characterized by the values ofin the range from 5 to 60, preferably from 5 to 30. The values of the characteristic viscosity [] polymer (1) defined in tetrahydronaphtalene at 135With can vary, for example, in the range from 1.2 to 7 DL/g

Suitable examples of the polymer (1) are polymers that contain 10-65 wt.% high molecular weight fraction (fraction (i)) and 35-60 wt.% low molecular weight fraction (fraction (ii)), as described in European patent application 573862.

The polymer (2) is preferably selected from copolymers of ethylene/propylene, copolymers of ethylene/butene-1, copolymers of ethylene/propylene/S4-C10-olefin containing from 5 to 15 mol.%-olefin.

Preferably p is can be added in the pure state or in the form of a mixture with crystalline polyolefins. The above mixture may fully or partially replace the polymer (2). Suitable examples of the said mixtures are thermoplastic elastomeric olefin polymer compositions.

Accordingly, an object of the present invention is also the case for bottles containing a mixture of the above polymer (1) and thermoplastic elastomeric olefin polymer composition containing the following components (wt.%):

a) 70-97%, preferably 78-97% propylene homopolymer, containing more than 90%, preferably more than 94% of a fraction soluble in xylene at room temperature, or a crystalline propylene copolymer with ethylene or With4-C10-olefin or mixtures thereof, containing more than 85 wt.% propylene and the copolymer contains at least 85 wt.% the fraction soluble in xylene at room temperature;

b) 0-10%, preferably 1-10% of a crystalline copolymer containing ethylene, insoluble in xylene at room temperature; and

c) 3-20%, preferably 3-12% of an amorphous copolymer of ethylene with propylene and/or C4-C101-olefin, and optionally with a diene content of diene in the range from 1 to 10%, dissolve the first polymer (2) consists of the sum of components b) and C).

Preferably the said mixture contains 30-80 wt.% polymer (1) and 20-70 wt.% thermoplastic elastomeric olefin polymer composition in the calculation of the mixture, more preferably 40-60 wt.% polymer (1) and 60-40 wt.% thermoplastic elastomeric olefin polymer compositions.

In the preferred case, as the polymer (1) and component (a) thermoplastic elastomeric olefin polymer compositions are propylene homopolymers, and the total ethylene content is 4 wt.% or less.

In this application the room temperature refers to a temperature of approximately 25C.

Typically, thermoplastic elastomeric olefin polymer composition used in the present invention, characterized by the value of the modulus of elasticity in bending at 23With in the range from 1300 to 1600 MPa.

Examples of dienes suitable for obtaining the component (C) are 1,4-hexadiene, 1,5-hexadiene, Dicyclopentadiene, ethylidenenorbornene, 1,6-octadien and vinylnorbornene. The preferred ethylidenenorbornene.

Examples4-C10-olefins, suitable for receiving various components of thermoplastic elastomer olele are amorphous copolymer of ethylene/propylene, the copolymer of ethylene/propylene/diene or a copolymer of ethylene/propylene/butene-1.

When component (C) is terpolymer,the olefin used as termokamera, preferably is present in an amount of from about 3 to about 10 wt.%.

Polymer composition (A) can be obtained separately obtain the polymer (1) and polymer (2) and their subsequent mixing in the molten state, or it can be obtained directly during the synthesis by introducing an additional stage polymerization stage after polymerization to obtain the polymer (1).

The polymer (1) and the above-mentioned thermoplastic elastomeric olefin polymer composition can be obtained by mixing the individual polymers or, preferably, directly in the course of polymerization during the process of sequential polymerization in a sequence of two or more reactors, in the presence of certain catalysts of the Ziegler-Natta.

In the General case, the polymer (1) is formed in the first stage polymerization, whereas at later stages will polimerizuet monomers corresponding to the production of polymer (2) or thermoplastic elastomer is(ii).

The polymerization process can be carried out in an inert atmosphere continuously or periodically in accordance with known techniques and with the flow of the process in the liquid phase in the presence or absence of an inert diluent, or in gas phase or in a mixed gas-liquid phase. Preferably the process in the gas phase.

The preferred method of obtaining mentioned thermoplastic elastomeric olefin polymer composition is a two-stage polymerization process, including the production of component (a) in the liquid monomer and, after that, the receiving components (b) and (C) in the gas phase.

As needed as a transmitter circuit for regulating the molecular weight can be added hydrogen, as well as other known regulators of molecular weight. When dosing the concentration of the molecular weight regulator at various stages, you can get the above values of the characteristic viscosity and MFRL.

The time and temperature of reaction are not critical conditions; however, the temperature preferably is in the range from 20 to 100C.

For example, the normal reaction temperature used in PoE the reaction temperature, used for obtaining the component (a) is in the range from approximately 40 to approximately 90C, preferably from approximately 50 to approximately 80C. Components (b) and (C) are usually obtained at a temperature in the range from approximately 50 to approximately 80C, preferably from about 65 to 80C.

The reaction can be conducted at pressures ranging from about atmospheric to about 7 MPa, preferably from about 1 to 4 MPa in the polymerization in the liquid phase and in the range from 0.1 to 3 MPa, preferably from 0.5 to 3 MPa during polymerization in the gas phase. A typical stay is enclosed within from about 30 minutes to about 8 hours.

Suitable inert hydrocarbon diluents include saturated hydrocarbons such as propane, butane, hexane and heptane.

The catalysts used for obtaining the above-mentioned polymers can be pre-entered in contact with small quantities of olefin (terpolymerization). Terpolymerization improves both the catalyst activity and the morphology of the polymers.

Terpolymerization wire is the process temperature in the range from room temperature up to 60With over a period of time sufficient to obtain a polymer in an amount in the range from 0.5 to 3 times the mass of the solid component, it can also be carried out in liquid propylene in the above-described conditions of temperature and obtaining the polymer in amounts that can reach up to 1000 g per gram of catalytic component.

The catalyst used for obtaining the polymer (1), preferably distinguished by the fact that with its help it is possible to obtain a propylene polymers containing fraction insoluble in xylene at 25With more than 90%, or 90 wt.%, preferably more than 94%, or 94 wt.%. Moreover, he has a sensitivity to the action of molecular weight regulators, high enough so that you can obtain the propylene homopolymers containing high molecular weight fraction and a low molecular weight fraction.

Methods of obtaining propylene polymer (1) with a wide molecular weight distribution is described, for example, in the above-mentioned European patent application 573862.

The catalysts used in the method of producing the polymer (1) and the above-mentioned thermoplastic elastomeric olefin polymer compositions are in financial p is Nisha least one communication titanium-halogen, and electron-donor compound, both put on a magnesium halide in active form;

(b) Al-alkyl-containing compound and possibly

(c) an external electron-donor compound.

The solid components of catalyst (a) having the aforementioned characteristics, and these catalysts are well known in the patent literature. In particular, are suitable catalysts are described in U.S. patent No. 4399054 and in European patents 45977 and 395083.

In the General case, the solid components of catalyst used in the above-mentioned catalyst, contain electron-donating compounds, and compounds selected from ethers, ketones, lactones, compounds containing N atoms, R and/or S, and esters of mono - and dicarboxylic acids. Particularly suitable electron-donor compounds are esters of phthalic acid, such as Diisobutyl, dioctyl-, diphenyl -, and benzylbutylphthalate.

Other suitable electron donors are simple 1,3-diesters of the formula:

(RI)(RII)C(CH2ORIII)(CH2ORIV),

where RIand RIIidentical or different, represent a C1-C18alkyl, C3-C18cycloalkenyl or C7-C18killradio or are simply 1,3-diesters, in which the carbon atom in position 2 belongs to a cyclic or polycyclic structure consisting of 5, 6 or 7 carbon atoms and containing two or three bonds.

Ethers of this type are described in published European patent applications 361493 and 728769.

Examples mentioned simple diesters are 2-methyl-2-isopropyl-1,3-dimethoxypropane, 2,2-Diisobutyl-1,3-dimethoxypropane, 2-isopropyl-2-cyclopentyl-1,3-dimethoxypropane, 2-isopropyl-2-isoamyl-1,3-dimethoxypropane and 9,9-bis (methoxymethyl)fluorene.

The above-mentioned polymers and polymer compositions can be mixed with the usual additives for polymers, such as stabilizers, pigments, etc., the nuclei of crystallization, such as p-tert-butylbenzoate, 1,3 - and 2,4-dibenzylidene, sodium benzoate, talc, and the usual additives for caps for bottles, such as antistatic agents and additives which improve the sliding.

To obtain mixtures can be used, any suitable apparatus known from the prior art, for example, extruders.

As already mentioned, usually MFRL polymer composition (A) range from 0.3 to 100 g/10 min. Mentioned MFR values can be obtained directly in polymerization or vposledstviii polymerization. Light cracking can be carried out using free radical initiators such as organic peroxides. Examples of organic peroxides are 2,5-dimethyl-2,5-di-tert-BUTYLPEROXY)hexane and dicumylperoxide. Easy cracking is carried out by means of suitable amounts of free-radical initiators in an inert atmosphere, such as nitrogen.

The above process can be carried out in accordance with known techniques, methods and technological conditions.

Caps for bottles of the present invention can be produced using a method of direct pressing of the above-olefinic polymer composition, characterized by a preferably value MFRL - in the range of from 0.8 to 6 g/10 minutes But can also be used and the method of injection molding when using compositions with values MFRL at least equal to 2 g/10 min, preferably in the range of from 3 to 20. The above-mentioned forming methods are implemented in accordance with known techniques.

Caps for bottles corresponding to the present invention, may be of standard size and weight caps are commonly used in modern technologies pasteurization. In cha is naznacheniya for pasteurization. In the General case cover for bottles have an internal diameter in the range from 12 to 48 mm and a weight of from 0.5 to 10, Usually cover for soft drinks have an internal diameter of approximately 28 mm, height approximately equal to 20 mm, a wall thickness in the range from 0.8 to 1.8 mm and a weight in the range from 2.5 to 4,

Caps for bottles of the present invention may also include tape, allowing to detect unauthorized opening. Moreover, caps for bottles of the present invention may include a sealing tube that provides impermeability to gas and liquid, or a separate rubber sealing gasket.

Generally speaking, caps for bottles of the present invention due to its good mechanical properties at high temperatures can be used whenever the bottle should be subjected to high temperatures. For example, caps for bottles of the present invention particularly suitable for exposure to conditions pasteurization cycles mentioned above, as well as for capping bottles for storing at high temperatures for a long time.

For the characterization of polymers and compositions obtained and the L.

Characteristic viscosity []: defined in the Tetra-hydrenaline at 135C.

The ethylene content: IR-spectroscopy.

Fractions, soluble and insoluble in xylene at 25From:

2.5 g of polymer was dissolved in 250 ml of xylene at 135With under stirring. After 20 min the solution was left to cool to 25With, still under stirring, and then for 30 min in a solution flowed deposition. The precipitate was filtered using filter paper, the volatile components of the solution drove away in a stream of nitrogen and received the residue dried in vacuum at 80°C to constant weight. Thus calculated mass percentage of polymer soluble and not soluble in xylene at room temperature.

: was measured using gel permeation chromatography.

The rate of polydispersity (PI): the measurement of molecular weight distribution of the polymer. To determine the value of PI at a temperature of 200With defined separation module with a low modulus value, for example, 500 PA, using a rheometer with parallel plates RMS-800 model,about 100 rad/sec. From the magnitude of the separation module can be obtained PI by the following equation:

PI=54,6(separation module)-1,76,

where separation module (MS) is defined as

MS = (frequency at G’=500 PA)/(frequency at G’=500 PA), where G’ is the storage modulus, a G’ is the loss modulus.

The modulus of elasticity in bending (FM): ISO 178.

Elongation at yield strength: ISO/R 527.

Tensile strength at break and yield stress ISO 527.

Test for impact strength Izod notched: ISO 180/1A.

The temperature of the occurrence of thermal deformation (HDT) ISO 75.

The heat Vika: ISO 306.

The following examples are provided to illustrate and not to limit the present invention.

Polymeric compositions used in examples.

Composition (A) is a composition of propylene polymer, characterized by the value MRFL, equal to 1.9 g/10 min, and receive chemical degradation of the preceding compositions by means of suitable quantities of organic peroxides. The composition is subjected to easy cracking, characterized by the value MRFL equal to 1.2 g/10 min, content of soluble in xylene fraction, 6.5 wt.%, the value characteristicsfor:

estimates 95.2 wt.% propylene homopolymer with a content of fraction soluble in xylene, equal to 2.5 wt.%, the value of PI equal to 4.7, and the value ofequal to 7.6; and

- to 4.8 wt.% copolymer of ethylene/propylene with ethylene content equal to 48 wt.%. Soluble in xylene fraction copolymer is 86 wt.% and contains of 28.2 wt.% of ethylene.

Previous composition was prepared continuously in a sequence of three United reactor where propylene homopolymer is a product obtained in the first two reactors, and the copolymer of ethylene/propylene get in the third. The polymerization is carried out in the presence of a catalyst resulting from the interaction of a solid catalyst component containing TiCl4and diisobutylphthalate, both printed on the MgCl2in the active form, triethylaluminum and dicyclopentadienyliron as electron-donor compounds.

The polymer (C) is a propylene homopolymer characterized by the value MRFL equal to 3.5 g/10 min, content of soluble in xylene fraction, equal to 1.8 wt.%, the value of PI equal to 6, and the value ofequal to 9.3; homopolymer as the germ of crystallization is the conclusion of the addition, that third stage polymerization is not carried out.

The results of the runs of polymerization for obtaining the composition (a) and polymer (B) are shown in table 1.

Composition (C) is a composition of propylene polymer, characterized by the value MRFL, equal to 4.6 g/10 min, and receive chemical degradation of the preceding compositions by means of suitable quantities of organic peroxides. The composition is subjected to degradation, characterized by the value MRFL equal to 3.0 g/10 min, content of soluble in xylene fraction (without oils), equal to 8.4 wt.%, the value of the characteristic viscosity [] soluble in xylene fraction (without oils), equal to 2.3 DL/g and the following composition:

- 93 wt.% propylene homopolymer, characterized by the value MRFL, equal to 3.1 g/10 min; soluble in xylene fraction is 2.5 wt.%, the value of PI is equal to 4.2, and the value ofwell 6,9; and

- 7 wt.% amorphous copolymer of ethylene/propylene, containing 48% of ethylene. Soluble in xylene fraction in the copolymer is 86%, and it contains 32 wt.% of ethylene.

Composition (D) is a thermoplastic Elastomertechnik composition by means of suitable quantities of organic peroxides. The composition is subjected to easy cracking, characterized by the value MRFL equal to 4.0 g/10 min, a value of the characteristic viscosity [] soluble in xylene fraction (without oils), equal to 2.3 DL/g and the following composition:

is 91.5% of a crystalline propylene homopolymer containing approximately 2.5% of a fraction soluble in xylene; and

8.5% of a copolymer of ethylene/propylene containing 60 wt.% of ethylene. Soluble in xylene fraction in the copolymer of 72 wt.%, and it contains 40 wt.% of ethylene.

Compositions (C) and (D) receive sequential polymerization in the presence of ensuring high yield and highly stereospecific catalyst of Ziegler-Natta printed on the MgCl2.

Example 1

Pellets of the polymer (A) containing 5500 million days of erucamide, 3000 million days of glycerol monostearate and 1100 million D. sodium benzoate, obtained by the extrusion apparatus Werner ZSK 280 (L/D equal to 16, and the diameter of 280 mm), operating at a temperature in the range of 235-240C.

The samples were obtained by injection molding the pellets of the polymer obtained by extrusion. The samples were received in accordance with method ISO 1873-2.

Example 2

Repeated example 1. The only one who EP 1 except instead of the composition (A) used a mixture of polymer (A) and composition (D). The ratio of the polymer (In)/composition (D) is equal to 1/1.

Comparative example 1C

Repeating example 1 except that instead of the composition (A) used the composition (D).

Table 2 provides the mechanical properties determined using test specimens obtained in examples 1-3 and comparative example 1C.

Example 4

Granules, extruded in example 3, was transformed into a standard screw caps using injection molding. Mentioned screw caps were intended for soft drinks, they had an inner diameter approximately equal to 3 g, and they were supplied rubber sealing gasket and tape, allowing to detect unauthorized opening.

Technological conditions for the installation of injection molding with 32 cavities form were as follows:

the temperature of cylinder: 210-230With,

the temperature of a heated sprue: 221-260With,

the temperature of the cooling water in the form: 15With,

time injection box: 0,33 sec,

the length of wire pressure: 0,90 s,

alarm time: 3,14 sec.

Use the military so screw caps filled with lemonade, with the CO2equal to 5.0 g/L. After this bottle was subjected to pasteurization cycle conducted at 77With and within the time span of 50 minutes Standard torque for capping is 1.15 kgsee

It was noted that the screw caps were not plucked from the bottle, and the liquid leaked from the bottles during and upon completion of the pasteurization cycle. The gas content in the bottles was 4,13 g/l after pasteurization cycle (and the required minimum content of CO2is 3.5 g/l).

Example 5

Repeating example 4, except that used a mixture of 25 wt.% polymer (b) and 75 wt.% composition (D).

It was noted that the screw caps were not plucked from the bottle, and the liquid leaked from the bottles during and upon completion of the pasteurization cycle. The gas content in the bottles was 4,06 g/l after pasteurization cycle.

Comparative example 2C

Repeating example 5 except that instead of the mixture used composition (D).

It was noted that several screw caps with broken bottles, and a few screw-on lids slightly twenties, so that during or at the end of the pasta 2.

Claims

1. Olefin polymer composition for caps for bottles, comprising a crystalline propylene statistical copolymer with co monomer selected from ethylene and C4-C10-olefin (polymer 1), and the said copolymer contains at least 94 wt.% the fraction insoluble in xylene at room temperature, this composition has a value of elastic modulus in bending at 23°C, is at least equal to 1620 MPa, the value of the yield strength at 23°C, is at least equal to 33 MPa, and the value of impact strength Izod at 0°C, is at least equal to 2.5 kJ/m2.

2. Olefin polymer composition for caps for bottles, including 1) 90-100 wt.% crystalline propylene homopolymer or statistical copolymer with co monomer selected from ethylene and C4-C10-olefin, and the above-mentioned polymers contain at least 94 wt.% the fraction insoluble in xylene at room temperature (polymer 1); and 2) 0-10 wt.% elastomeric copolymer of ethylene with propylene or With4-C10-olefin or mixtures thereof, and, possibly, a diene content of the EPDM is Anuta composition is characterized by the value of the modulus of elasticity in bending at 23°C, at least equal to 1620 MPa, the value of the yield strength at 23°C,at least equal to 33 MPa; and the value of impact strength Izod at 0°C, is at least equal to 2.5 kJ/m2.

3. Composition under item 1 or 2, characterized in that the value of the flow velocity of the melt (in accordance with ASTM D 1238, condition L) is in the range of 0.3 to 100 g/10 min.

4. The composition according to p. 3, characterized in that it is subjected to chemical decomposition.

5. Composition according to any one of paragraphs.1-4, characterized in that the polymer (1) is a crystalline propylene polymer, characterized by the ratio ofin the range 5 - 60.

6. Composition according to any one of paragraphs.2-5, characterized in that the polymer (1) is a propylene homopolymer.

7. Olefin polymer composition for caps for bottles containing, wt.%: A) 30-80% of a crystalline propylene polymer having a ratio ofin the range of 5 to 60, with specified polymer selected from crystalline propylene homopolymer or statistical copolymer with co monomer selected from ethylene and C4- C10-olefin, these polymers contain at least 94 wt.% a fraction p of the composition, containing a) 70-97% propylene homopolymer, containing more than 90% of a fraction soluble in xylene at room temperature, or a crystalline propylene copolymer with ethylene or with C4-C10the olefin or mixture containing more than 85 wt.% propylene, the copolymer contains at least 85 wt.% the fraction soluble in xylene at room temperature; C) 0-10% of a crystalline copolymer containing ethylene, insoluble in xylene at room temperature; and (C) 3-20% of an amorphous copolymer of ethylene with propylene and/or C4-C10-olefin and, optionally, 1 to 10% of a diene, soluble in silole at room temperature and containing from 20 to 75% of ethylene;

where the elastomeric copolymer (Polymer 2) represents the sum of the copolymers b) and (C)), provided that, in the composition of the elastomeric copolymer is in an amount up to 10 wt.% and contains 40-85 mol.% ethylene and the above composition has a value of elastic modulus in bending at 23°Cat least 1620 MPa, the value of the yield strength at 23°Cat least 33 MPa, and the value of impact strength Izod at 0°C at least and homopolymers, and the total ethylene content is 4 wt.% in the calculation of the mixture.

9. The composition according to p. 7 or 8, characterized in that thermoplastic elastomeric olefin polymer composition has a value of elastic modulus in bending at 23°C in the range of 1300 - 1600 MPa.

10. Cap the bottle containing the composition according to any one of paragraphs.1-9.

11. Cover under item 10, made in the form of screw caps.

12. Bottles, we cork cap for bottles under item 10 or 11.

13. A method of manufacturing a cover for a bottle under item 10 or 11 direct pressing of olefin polymer composition according to any one of paragraphs.1-9.

14. A method of manufacturing a cover for a bottle under item 10 or 11 injection molding olefin polymer composition according to any one of paragraphs.1-9.

 

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