Dynamically partially vulcanized with peroxides thermoplastic elastomer composition and its preparation

 

(57) Abstract:

Describes how to dynamically partially vulcanicola elastomer composition comprising a polypropylene material, a rubber-based amorphous copolymer of ethylene and propylene, semi-crystalline, essentially linear copolymer of ethylene and propylene, low density, and vulcanizing a mixture containing 1,2-polybutadiene and an organic peroxide, and how you can get it. 3 C. and 15 C.p. f-crystals. table 4.

The present invention relates to dynamically partially vulcanized with peroxides thermoplastic elastomer composition and the way it was received.

Known thermoplastic elastomer polyolefin and monoolefinic copolymer rubber, which are vulcanized using a single agent, the crosslinking of the organic peroxide or in the presence of coagent. In U.S. patent N 3456038 describes such a composition containing atactic polypropylene and an elastomeric copolymer of ethylene and propylene (EPR), cured with peroxide and coagent. However, the source indicated that EPR is compatible only atactic polypropylene, and not isotactic (stereoregular) - crystalline polypropylene as isotactic polypropy free radicals. Also, the crystalline polypropylene has a high melting point and therefore would not be compatible with the ethylene-propylene rubber at normal temperature curing about 230oF (160oC).

In U.S. patent N 4267080 describes a polyethylene composition comprising a polymer of ethylene and a rubber and/or elastomer with a crosslinking agent such as organic peroxide and at least one adjuvant linkage selected from the set consisting of 1,2-polybutadiene, cialiscanada and triallylisocyanurate. The use of a crystalline polypropylene instead of polyethylene, in combination with ethylene-propylene rubber is not covered, or at least it is assumed in the above-mentioned source.

In the above-mentioned sources, the vulcanization method is static and not dynamic. However, it was found that a thermoplastic elastomer consisting of a polyolefin and monoolefinic copolymer rubber having the desired properties can be obtained by dynamically partial curing of the two polymers. The closest analogue of the present invention is U.S. patent N 3806558, which describes obtaining a thermoplastic elastomer by shifting the MES is or rubber-based ternary polymer of ethylene, propylene and not conjugated diene (ERDM) with polyolefin resins represented by polyethylene or polypropylene, and a conventional curing agent, forming a free radical, separately or compatible with normal Saganami while plasticization of the mixture, leading to the formation of dynamically partially utverzhdenii composition. The curing conditions are such that the composition undergoes crosslinking to the state in which it becomes almost insoluble in the usual solvents for the uncured mixtures. Similarly, in the U.S. patents NN 4732940 and 4785045 describes a dynamically partially cured composition comprising a polyolefin polymer and monoolefinic copolymer rubber obtained by dynamically curing in the presence of organic peroxide crosslinking agent and auxiliary means of stitching.

Although dynamically partially cured thermoplastic elastomer of the above known solutions and has improved properties compared with thermoplastic elastomer, utverzhdennym statically, this connection is still lacking balance of all properties, including ultimate tensile strength, and modulus.

Price is, the resulting receive a dynamically partially cured thermoplastic elastomers having improved ultimate tensile strength and modulus, useful in the manufacture of molded and extruded products, such as industrial hoses, aromatic part and the protective sheath.

Accordingly, the present invention proposes a dynamically partially vulcanized with peroxides thermoplastic composition, comprising: (a) a crystalline polypropylene with a measure of stereoregularity more than 90% of b) an amorphous ethylene-propylene copolymer rubber; (c) ethylene-propylene copolymer, characterized in that the ethylene-propylene copolymer includes polycrystalline linear, low density, insoluble in xylene at room temperature, ethylene-propylene copolymer with ethylene content of more than 90% of the total number of a)+b)+c) is 100 parts, and further comprises a vulcanizing system (d) per 100 parts of (a)+(b)+(c) containing (i) 3-15 parts of 1,2-polybutadiene and (ii) 1,1-1,8 part peroxide agent with a half-life of 3.3-20 min at 160oC in ERDM in the following ratio of components, parts, mass:

a)- 40

b) 40

C) 20

d)

i what about the vulcanized with peroxides thermoplastic elastomer composition by mixing (a) a crystalline polypropylene with a measure of stereoregularity more than 90% (b) amorphous ethylene-propylene copolymer rubber; (c) ethylene-propylene copolymer, and (d) vulcanizing system, characterized in that the ethylene-propylene copolymer includes a semi-crystalline, linear, low density, insoluble in xylene at room temperature, ethylene-propylene copolymer with ethylene content of more than 90% when the total number (a)+(b)+(c) 100 parts, and when mixed use (a) 40 parts of crystalline polypropylene; (b) 40 parts of an amorphous ethylene-propylene copolymer rubber; (c) 20 parts of a semicrystalline linear low density ethylene-propylene copolymer and (d) vulcanizing system per 100 parts of (a)+(b)+(c) containing (i) 3-15 parts of 1,2-polybutadiene and (ii) the 1.8-1.8 parts peroxide agent with a half-life of 3.3-20 min at 160oC in EGM and the process is conducted 160-225oC.

In another embodiment, a method of obtaining a dynamically partially vulcanized with peroxides thermoplastic elastomer of the composition is a mixture of (a) crystalline polypropylene with a measure of stereoregularity more than 90% (b) amorphous ethylene-propylene copolymer rubber; (c) ethylene-propylene copolymer and (d) vulcanizing system, characterized in that the ethylene-propylene copolyme the re ethylene-propylene copolymer with ethylene content of more than 90% when the total number a/+b/+c/ 100 parts, and when mixed use /a/ 40 parts of crystalline polypropylene, /b/ 40 parts of an amorphous ethylene-propylene copolymer rubber, /c/ 20 parts semi-crystalline linear, low density ethylene-propylene copolymer, the resulting homogeneous mixture 3-15 parts /i/ 1,2-polybutadiene per 100 parts of /a/+/b/+/c/ is mixed until a homogeneous mixture, add 1.1 to 1.8 parts /ii/ peroxide agent with a half-life of 3.3-20 minutes at a temperature of 160oC in ERDM per 100 parts a/+b/+c/ and continue mixing at a temperature of 160-225oC, and stirring is carried out continuously during all operations.

In the absence of other instructions, all parts and percentages herein are by weight.

The polypropylene material used in the present invention, as the component (a) includes (i) a crystalline polypropylene having an index of stereoregularity more than 90%, preferably, from 95 and 98%, and from about 90 to about 94% insoluble in xylene at room temperature.

Component (b) of the present invention is an amorphous rubber is TSS a linear copolymer of ethylene and propylene, low density component (c) consists of elementary units of ethylene, more than 90%, preferably more than 95% insoluble in xylene at room temperature. The term "semi-crystalline" as used in this application, is defined as the degree of crystallinity from about 22 to 55%, preferably from about 25 to about 50% if you measure the heat of fusion (c), which determine the methods of differential scanning calorimetry on a sample weighing 5-10 mg (c) heated at a rate of 20oC/min, and the assumption that the heat of fusion of 100% crystalline polyethylene at a temperature of 400oK is 293 j/g, as described in U. Gaur and B. Wunderlich, J. Phys. Chem. Ref. Data, 10/1 119, 1981. The percentage of crystallinity calculated by dividing the heat of fusion (c) a heat of fusion of 100% crystalline polyethylene and multiplying by 100.

The total amount of components (a)+(b)+(c) in the composition provided by the present invention is 100 parts.

In curing the mixture of the present invention 1,2-polybutadiene has a molecular weight of at least 1300 to about 13000, preferably by rapid 70-90% of the Amount of 1,2-polybutadiene, present in the mixture is from 3 to 15 parts, preferably 6-12 parts, relative to 100 parts of (a)+(b)+(c). 1,2-polybutadiene can be used in liquid form or solid carrier and it is commercially acceptable.

Dynamically partially cured thermoplastic elastomer, provided by the present invention, is obtained by adding a curing mixture (d) to the mixture of components (a), (b) and (c) and exposure to a mixture of vulcanization conditions, while masticate mixture to provide the necessary dynamic partial vulcanization.

Components (a), (b) and (c) to form a homogeneous mixture, obtained by the initial polymerization of propylene with the aim of obtaining the component (a) and subsequent polymerization of propylene and ethylene in the presence of component (a) to form component (b) and (c). In the alternative, the components (a), (b) and (c) can each be obtained separately and then mix by plasticization of the melt.

Suitable catalytic composition for the polymerization processes include the reaction product of a solid catalyst containing a compound of titanium and an electron-donor compound deposited on activated magnesium dichloride, soedin-77 and the application of the U.S., reg. N 515936, registered on April 27, 1990.

The term "partially cured" in the form in which it is used here, means that the degree of vulcanization in units of kelestarian is at least 80% and not more than 94% in cyclohexane. Preferably kelestarian ranges from 85 to 92%

The temperature of mixing and/or mastication is between 160oC and 225oC, preferably 180oC and 200oC, during the period of time from approximately 2 to 30 minutes, preferably 3 to 20 minutes, to obtain a dynamically partially cured thermoplastic elastomer provided by the present invention. Under the above conditions of vulcanization at least 97% of the vulcanizing agent is depleted, usually 98-99% (based on theoretical half-life at 160oC in EGM.

The process of mastication or shear deformation can be performed on an open roll, a closed rubber mixer (e.g., Banbury mixers or Haacke), adenocarcinoma or dual extruders.

When obtaining a thermoplastic elastomer provided by the present invention, the order in which you enter the components and mixing them is important what about the above, thin, then add the 1,2-polybutadiene in liquid or solid form, and stirring is continued until, until a homogeneous mixture, approximately 1-2 minutes. With the introduction of 1,2-polybutadiene in the form of liquid, it is introduced in small increments from 25 to 50% over a period of time from 2 to 6 minutes, and when it is introduced in solid form, it is introduced all at once. After that add the peroxide and mix until until there is no change in viscosity, approximately 5-7 min, which indicates that virtually all of the peroxide used. Mastication then continue for an additional 1-2 minutes

Another way to obtain a thermoplastic elastomer provided by the present invention, is in the preliminary mixing of the components. In this way all components are pre-mixed by drum mixing, for example, in mill Hensel or U-shaped mixer. The premix is then loaded into the chamber of the high intensity mixer, mix until dissolution and achieve constant viscosity, for approximately 1-3 minutes, and continue mastication for an additional 1-2 minutes

In addition, vulcanizing/or sulfur donors, such as mercaptobenzothiazoles, benzothiadiazole, tetramethylthiuramdisulphide, tetramethylthiuramdisulphide, departmentdirectory, N,N'-diethyltoluamide and dibutyldithiocarbamate zinc. The number of additionally used coagent is in the range from 0.5 to 3 parts, preferably 1-2,5 parts, and the amount of sulfur donor is in the range from about 0.15 to 3 parts, preferably 0,17-2 parts, relative to 100 parts of (a)+(b)+(c). Used in the present invention donors sulfur and phenylene-bis-imide of maleic acid are commercially available.

When vulcanizing the mixture additionally contains additional coagent and/or a sulfur donor, coagent injected with 1,2-polybutadiene, and the sulfur donor is administered in combination with a peroxide.

In addition to the above-mentioned main components, thermoplastic elastomer is typically antioxidant is present in amount of from 0.1 to 0.9 parts, relative to 100 parts of (a)+(b)+(c). Suitable examples of antioxidants used in this invention are thiophenol 4,4'-thio-bis (6-t-butyl-m-cresol); phosphites, disneylandhotel; complex phenolic ethers, tetrachlorethylene-3-(3,5'-di-t-butyl-4'-hydroxyl-propionate) methane; codependency available.

Also thermoplastic elastomer, provided by the present invention may contain other known additives, such as oil filling (rubbers) such as paraffinic and naphthenic oils, in an amount of from 20 to 50 parts, relative to 100 parts of ethylene-propylene rubber, or zinc oxide, in an amount of from 2 to 6 parts, relative to 100 parts of (a)+(b)+(c).

Before adding peroxide injected antioxidant, as well as any other known additives, such as oil filling (rubbers), zinc oxide or additional antioxidants. When a thermoplastic elastomer produced by the method of pre-mixing, the oil filling is injected after downloading the premix into the mixer and start to liquefy ingredients.

The present invention will be illustrated in more detail with reference to examples of the invention below. Physical properties in the following working examples and comparative examples were measured as follows:

Tensile strength tensile ASTM D-412

Elongation at break ASTM D-412

100% modulus ASTM D-412

200% modulus ASTM D-412

The shore hardness ASTM D-2240

The residual strain in compression ASTM D-395, Method BoC within 48 hours, specimen extraction and drying it to constant weight (approximately 72 hours) in a vacuum oven at 80oC gel was calculated as:

< / BR>
Example 1. This example illustrates the partially vulcanized thermoplastic elastomer, provided by the present invention, the method of its production.

Closed internal mixing head Haacke (Model 600 E) set at a temperature of between 181oC and 183oC and speed of mixing 80 rpm downloaded 40 parts of crystalline polypropylene with a measure of stereoregularity about 92, 40 parts of a rubber-based copolymer of ethylene and propylene with an ethylene content of about 50%, and 20 parts semi-crystalline, essentially linear copolymer of ethylene and propylene, low density, which is insoluble in xylene at room temperature and has an ethylene content of 96% of the Ingredients are stirred until a homogeneous mixture (approximately 3 minutes), then added 0.1 part of 4,4'-thio-bis(6-t-butyl-m-cresol) and 6 parts of zinc oxide, and the content was stirred for about 1 min. Then to the mixture was added 6 parts of 1,2-polybutadiene in solid form and was stirred for 1 min After dobavil for 9 minutes

The mixture was then placed on the bottom plate of the press direct pressing, closed top plates and subjected to the direct extrusion at a temperature of 420oC for 3 min under a pressure of 15 tons. Plates were removed from the hot press and placed in a press at room temperature and cooled under a pressure of 15 tons for approximately 15 min, and then were removed for testing.

Table 1 shows the physical properties of this dynamically partially cured thermoplastic elastomer, provided in this example.

Example 2. Dynamically partially cured thermoplastic elastomer was obtained in accordance with the technology and ingredients of example 1, except that instead of 6 parts of 1,2-polybutadiene was used in 12 parts. Physical properties are shown below in table 1.

Example 3. Dynamically partially cured thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 2, except that instead of 6 parts of zinc oxide was used 3 parts. The physical properties set forth below in table 1.

Comparative example 4. Thermoplastic elastomer b is 1,2-polybutadiene was not used. Physical properties are shown in table 1.

Comparative example 5. A thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that instead of the 1,2-polybutadiene were used, 0.2 parts of sulfur. Physical properties are shown in table 1.

Comparative example 6. A thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that instead of 1,2-polybutadiene and 6 parts of zinc oxide were used, 0.2 parts of sulfur and 3 parts of zinc oxide. Physical properties are shown in table 1.

Examples 1-3 demonstrate the increase in voltage when the elongation of the sample and ultimate tensile strength as compared with comparative example 4 in which no polybutadiene or sulfur, and comparative examples 5 and 6, which is used only sulfur.

Example 7. Dynamically partially cured thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that 0,73 part of benzothiazolylthio was added together with peroxide, and instead of 6 parts of 1,2-polybut the Example 8. Dynamically partially cured thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that 0,17 part of departamentointernacional were added together with peroxide, and instead of 6 parts of 1,2-polybutadiene was added 12 parts of 1,2-polybutadiene. The physical properties set forth below in table 2.

Example 9. A thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that 0,73 part of mercaptobenzothiazoles was added together with peroxide, and instead of 6 parts of 1,2-polybutadiene. Physical properties are shown in table 2.

Example 10. A thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that 0,73 (part) tetramethylthiuramdisulphide was added together with peroxide, and instead of 6 parts of 1,2-polybutadiene was used 12 parts of 1,2-polybutadiene. Physical properties are shown in table 2.

Example 11. Dynamically partially cured thermoplastic elastomer was obtained in accordance with the technology and using the Ingram is local with 12 parts of 1,2-polybutadiene instead of only 6 parts of 1,2-polybutadiene. Physical properties of thermoplastic elastomer are shown in table 2.

Examples 12-14. A dynamically partially cured thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that 2 parts of phenylene-bis-imide maleic acid were added together with 3,6 and 12 parts of 1,2-polybutadiene, and 0.7 part of benzothiazolylthio was added together with the peroxide. Physical properties are shown in table 2.

Comparative example 15. A thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that there was no 1,2-polybutadiene. The physical data are given in table 2.

Comparative example 16. A thermoplastic elastomer was obtained in accordance with the technology and using the ingredients of example 1, except that instead of 6 parts of 1,2-polybutadiene was used 1,4 part phenylene-bis-imide maleic acid. The physical data are given in table 2.

Comparative example 17. A thermoplastic elastomer was obtained in accordance with the technology and using ingredients from Primera 1,2-polybutadiene.

As demonstrated above, dynamically partially cured thermoplastic elastomer, provided by the present invention, having a curing mixture containing peroxide and 1,2-polybutadiene has a better overall balance of properties compared to the comparative compositions in which the polybutadiene in the curing mixture is not used.

Examples 18-20 and comparative example 21.

All the ingredients listed below were pre-mixed by drum mixing of all ingredients in the mill hensely for about 3-4 min. Premix loaded in the internal mixing head /Model E/, which maintained the temperature between 181oC and 183oC and a stirring speed corresponding to 80 rpm, and was stirred for approximately 6-8 minutes and the Mixture was continued to stir for an additional 2 minutes

The mixture is subjected to molding according to the technology described in example 1.

The positive effect of the claimed invention in comparison with the U.S. patent N 3806558 demonstrated by the examples below. Comparison of tensile strength, 100% modulus and elongation of examples 4-8 and 17-20 in table is IDNO, best.

1. Dynamically partially vulcanized with peroxides thermoplastic elastomer composition comprising (a) a crystalline polypropylene with a measure of stereoregularity more than 90% of b) an amorphous ethylene-propylene copolymer rubber, ethylene-propylene copolymer, characterized in that as ethylene-propylene copolymer comprises a semicrystalline linear, low density, insoluble in xylene at room temperature, ethylene-propylene copolymer with ethylene content of more than 90% of the total number (a) + (b) + (C) is 100 hours further comprises a vulcanizing system d per 100 hours (a) + (b) + (C) containing: (i) 3 15 p.m 1,2-polybutadiene and (ii) 1,1 1,8 including peroxide agent with a half-life of 3.3 20 min at 160oWith ERDM in the following ratio, wt.h.

a) 40

b) 40

C) 20

d) 5

i) 3 15

ii) 1,1 1,8

2. The composition according to p. 1, characterized in that the peroxide agent is chosen from the group: 1,1'-bis(tert-butylperoxyisopropyl)-benzene, peroxide Dicumyl, n-butyl-4,4'-(tert-BUTYLPEROXY)-valerate, or 2,5-di(tert-peroxy)-2.5-dimethylhexane.

3. The composition according to p. 1, characterized in that the 1,2-polybutadiene contains 70 to 90% of 1,2-vinyl and has the in an amount of 0.1 to 0.9 PM and zinc oxide at 2 to 6 hours per 100 hours (a) + (b) + (C).

5. The composition according to p. 1, wherein the vulcanizing system d) further comprises the sulfur donor in the amount of 0.15 to 3 hours per 100 hours (a) + b) + c).

6. The composition according to p. 5, characterized in that the sulfur donor is chosen from the group: mercaptobenzothiazoles, benzothiadiazole, mono - or disulfide of tetramethylthiuram, execulive of dipentylester, N,N'-diethyltoluamide or dibutyldithiocarbamate zinc.

7. The composition according to p. 5, wherein the vulcanizing system d) additionally contains 0.5 to 3 hours phenylene-bis-midamaline acid per 100 hours (a) + (b) + (C).

8. The composition according to p. 1, characterized in that it contains a) 40 hours of crystalline polypropylene, in) 40 hours of amorphous ethylene-propylene copolymer rubber, (C) 20 hours a semicrystalline linear low density ethylene-propylene copolymer (d) curing system containing (i) 6 12 o'clock polybutadiene and (ii) 1,1 1,8 including 1,1'-bis(tert-butylperoxyisopropyl)benzene.

9. A method of obtaining a dynamically partially vulcanized with peroxides thermoplastic elastomer composition by mixing (a) a crystalline polypropylene with parasitesapril and d) curing system, characterized in that as ethylene-propylene copolymer used semi-crystalline, linear, low density, insoluble in xylene at room temperature, ethylene-propylene copolymer with ethylene content of more than 90% when the total number (a) + (b) + (C) 100 hours and when mixed use and 40 hours of crystalline polypropylene, (b) 40 hours of amorphous ethylene-propylene copolymer rubber, (C) 20 hours a semicrystalline linear low density ethylene-propylene copolymer and (d) vulcanizing system per 100 hours (a) + (b) + (C) containing: (i) 3 - 15 hours of 1,2-polybutadiene and (ii) 1,1 1,8 including peroxide agent with a half-life of 3.3 20 min at 160oWith EGM and the process is conducted at 160 - 225oC.

10. The method according to p. 9, characterized in that the materials used and their content is reflected in paras. 4 7.

11. A method of obtaining a dynamically partially vulcanized with peroxides thermoplastic elastomer composition by mixing (a) a crystalline polypropylene with a measure of stereoregularity more than 90% of b) an amorphous ethylene-propylene copolymer rubber, ethylene-propylene copolymer and (d) vulcanizing system, characterized in that as ethylene-propylene copolymer re-propylene copolymer with ethylene content of more than 90% when the total number (a) + (b) + (C) 100 hours and when mixed use and 40 hours of crystalline polypropylene, (b) 40 hours of amorphous ethylene-propylene copolymer rubber, (C) 20 hours a semicrystalline linear, low density ethylene-propylene copolymer, the resulting homogeneous mixture add 3 15 o'clock i) 1,2-polybutadiene per 100 hours (a) + (b) + (C) are mixed until a homogeneous mixture, add 1,1 1,8 ch. ii) peroxide agent with a half-life of 3.3 20 min at a temperature of 160oWith ERDM per 100 hours (a) + (b) + (C) and continue stirring at a temperature of 160 225oC, and stirring is carried out continuously during all operations.

12. The method according to p. 11, characterized in that the 1,2-polybutadiene used in liquid form and injected in small doses.

13. The method according to p. 11, characterized in that it further includes the introduction of the antioxidant and zinc oxide before adding 1,2-polybutadiene.

14. The method according to p. 13, characterized in that it further includes adding 0.15 to 3 hours per 100 hours (a) + (b) + (C), sulfur donor selected from the group consisting from the group consisting of mercaptobenzothiazoles, benzothiazolylthio, tetramethylthiuramdisulphide, tetramethylguanidine, departmentdirectory, N, N'-dietro p. 13, characterized in that it further comprises adding 0.5 to 3 hours per 100 hours (a) + (b) + (c) phenylene-bis-midamaline acid in combination with the 1,2-polybutadiene.

16. The method according to p. 11, characterized in that it comprises mixing, by weight: (a) 40 hours of crystalline polypropylene, (b) 40 hours of rubber-based amorphous copolymer of ethylene and propylene and (C) 20 o'clock semi-crystalline, essentially linear copolymer of ethylene and propylene, low density, and (d) curing system containing (i) 6 12 h of 1,2-polybutadiene and (ii) 1,1 1,8 including 1,1'-bis(t - butylperoxyisopropyl)benzene.

17. The method according to p. 16, wherein the curing system further includes adding 0.15 to 3 o'clock sulfur donor in combination with 1,1'-bis(t-butylperoxyisopropyl)benzene.

18. The method according to p. 17, wherein the curing system further comprises 0.5 to 3 hours phenylene-bis-midamaline acid in combination with the 1,2-polybutadiene.

 

Same patents:

Composite material // 2074208
The invention relates to highly filled polymer composite materials with a binder based on polyolefins with wood filler

The rubber mixture // 2028327
The invention relates to the rubber industry, in particular rubber compound for the manufacture of linings for ball mills flow, operating at elevated temperatures under conditions of grinding abrasive materials, and can be used for similar purposes in industrial materials, mining, metallurgy, chemical industries

The invention relates to rubber, automotive industry, construction industry and is used for manufacturing neformaly rubber-technical products

Polymer composition // 2068858
The invention relates to waterproofing materials based unvulcanized rubber and can be used in construction for the device of roofs, as a primer, to seal the joints of the roof, roof repair

The invention relates to compositions of crystalline propylene polymers, designed for the production of thermoerosional film, and to a method for producing these compositions

The invention relates to polymer chemistry, and in particular to compositions based on polymer of propylene, which have improved handling characteristics, the impact resistance at low temperatures and good transparency

The invention relates to elastomeric compositions of the polyolefin elastoplast used for the manufacture of packaging in medical technology, automotive, electrical and other industries

The rubber mixture // 2036941
The invention relates to the rubber industry, in particular to the rubber mixture based on ethylene-propylene rubber, which can be used in exposure temperatures up to 150aboutWith

FIELD: road, industrial and civil building, in particular sealing and hydraulic insulating material.

SUBSTANCE: invention relates to industrial method for production of modified bitumen mastic. Claimed bitumen-polymer material contains (mass %) oil bitumen 60-70; synthetic resin 2-10; oil solvent and/or black oil 18-30; sulfur-containing compounds 0.5-5.0; and additionally oxyethylated alkylphenol as surfactant 0.1-5.0. Sulfated mixture of oil bitumen, synthetic resin, oil solvent and/or black oil treated for sulfitation at 140-2300C is used as sulfur-containing compounds. Method for production of said material also is disclosed.

EFFECT: polymer-modified bitumen mastic and sealing of improved quality; method for production of increased capability; inexpensive raw materials; energy-conversation technology.

6 cl, 3 ex, 4 tbl, 1 dwg

FIELD: polymer materials.

SUBSTANCE: invention relates to polyethylene molding mass with multimodule molecular weight distribution intended to manufacture hollow articles such as gas tanks, canisters, barrels, and bottles using extrusion. Molding mass has density at least 0.940 g/cm3, contains low-molecular polyethylene with viscosity index 40-150 cm3/g in amount 30 to 60%, high-molecular copolymer of ethylene with another C4-C10-olefin with viscosity index 150-800 cm3/g in amount 30 to 65%, and ultrahigh-molecular polyethylene with viscosity index in the region 900-3000 cm3/g in amount 1 to 30%. Molding mass is prepared by cascade-based suspension polymerization.

EFFECT: increased degree of blowing and improved balance between hardness and fissuring resistance.

3 cl, 2 tbl, 5 ex

FIELD: polymers.

SUBSTANCE: ethylenepropylene copolymer-base composition comprises dicumyl peroxide, bis-(tert.-butylperoxyisopropyl)benzene or 1,1-di-tert.-butylperoxy-3,3,5-trimethylcyclohexane as an organic peroxide and vinyltri-(methoxyethoxy)silane or polyphenylethoxysiloxane as an organosilicon additive. Except for, the composition comprises additionally a vulcanization co-agent taken among the group including low-molecular polybutadiene with the content of 1,2-links 20-80%, trimethylolpropane-trimethacrylate, triallyl cyanurate and quinone dioxime-1,4. Also, the composition comprises stearin, paraffin and zinc oxide. The composition shows high physical-mechanical properties, oil-resistance and dielectric properties. Invention can be used, in particular, in cable industry.

EFFECT: valuable properties of composition.

2 cl, 3 tbl, 8 ex

FIELD: composite materials on base of thermoplasts; injection molding of various parts, parts for railway engineering in particular: insulating bushes and locks of contact system, elastic insulating gaskets on wooden and concrete sleepers and busbars for switches.

SUBSTANCE: proposed polymer composition contains polyolefin, crumb rubber, synthetic ethylene propylene rubber and filler for micro-spheres from smoke emissions of thermal power plants; it also contains lubricant as additive. Mineral or vegetable oil at boiling temperature not below 180°C or low-molecular diane resins may be used as lubricant. Besides that, filler may contain talc. Use of smoke emissions of thermal power plant of preset composition and combination of components at definite ratio makes it possible to obtain molding compositions possessing high wear resistance, water resistance and oil resistance, low abradability at retained elasticity; increased service life.

EFFECT: enhanced efficiency.

4 cl, 2 tbl, 7 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to technology of making oriented synthetic films and, specifically, to biaxially oriented polypropylene films, which invention may be utilized in manufacture of food packaging materials. Film is formed from at least polypropylene (co)polymer containing at least 0.8 wt % ethylene and optionally one or several C4-C10-α-olefins or from polypropylene composition containing at least 0.8 wt % one or several comonomers selected from ethylene and C4-C10-α-olefins. (Co)polymer or polymer composition have melting point above or equal to 155°C and less than 3 wt % fraction soluble in xylene at ambient temperature. Weight ratio of polymer fraction collected within temperature range 25 to 95°C to above-mentioned xylene-soluble fraction is superior to 8.

EFFECT: improved physicochemical properties of biaxially oriented polypropylene films.

7 cl, 1 dwg, 6 tbl, 9 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a method for preparing thermoelastomers based on polyolefins and triple ethylenepropylene-diene rubber. The composition is prepared by the complete dynamic vulcanization of mixture of the following components, mas. p. p.: TSEPDR, 100.0; polypropylene, 25-60; low density polyethylene, 1-10; oil, 20-100; sulfur-accelerating vulcanization comprising the following components: sulfur, 0.1-2.0; thiuram, 0.1-1.5; Altax, 0.1-0.5; stearic acid, 0.1-20.0; zinc oxide, 0.5-8.0, or peroxide vulcanization comprising the following components: dicumene peroxide, 0.1-2.0; bis-maleimide, 0.1-2.5; novolacs alkylphenolformaldehyde resin, 0.2-10.0; organic phosphite, 0.02-1.0; pigment, 0.01-2.0; filling agent, 0.1-50.0; antioxidant, 0.1-2.0, and phthalate plasticizers, 0.5-10.0. The content of oil, polyethylene, phthalate plasticizers, novolacs resin and polypropylene is bound by the ratio. Invention provides enhancing thermostability, resistance against multiple temperature effects during the technological processing, resistance against harmful catalytic effect of metal with transient valence and improving the ecology of the process. Invention can be used in making elastic, atmosphere-resistant materials used in building industry, cable, automobile and light industries and in manufacturing different goods for consumption.

EFFECT: improved preparing method, valuable technical properties of composition.

30 cl, 4 tbl, 23 ex

FIELD: rubber industry; production of elastomer compositions on base of ethylene-propylene-diene rubber; production of roofing materials for hydraulic insulation of buildings, bridges, tunnels, roof coats.

SUBSTANCE: proposed rubber mix contains the following components: ethylene-propylene-diene rubber, butyl rubber or regenerate on base of butyl rubber, anti-oxidant, plasticizing agent (paraffin, mineral oil, chloro-paraffin), commercial carbon, chalk and/or kaolin and bitumen, colophony or benzoic acid, if necessary. Rubber mix may also contain Captax (rubber accelerating agent), thiuram or zinc ethyl diethyl dithiocarbomate, antimony trioxide, aluminum hydroxide, stearic acid and zinc oxide at definite ratio. Rubber mix is prepared on standard equipment of rubber industry.

EFFECT: enhanced resistance to burning and frost.

4 cl, 4 tbl

FIELD: polymer materials.

SUBSTANCE: invention relates to crystalline propylene copolymer-based compositions suitable to manufacture heat-weldable films and sheets. Composition according to invention contains 15-60% propylene copolymer having at least one C4-C8-α-olefin in amount 10-14% and 40-85% propylene copolymer having at least one C4-C8-α-olefin containing 14-30% of indicated C4-C8-α-olefin and optionally 0.5-3% ethylene, total proportion of C4-C8-α-olefin in propylene polymer-based composition being more than 10%. Melt flow rate MFR L of composition varies between 1 and 15 g/10 min. Such composition can be obtained by destroying composition-precursor prepared via stepped polymerization and containing the same components as above in the same proportions but having melt flow rate MFR L within a range of 0.1 to 5 g/10 min. Owing to combining two propylene copolymers containing more than 10% of C4-C8-α-olefins, composition possesses an useful balance of heat weldability, low content of fraction soluble in organic solvents, and optical properties (in particular very low turbidity and high brightness, and thereby good surface properties such as low tackiness and printing ability.

EFFECT: improved performance characteristics of material.

6 cl, tbl, 6 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to thermoplastic elastomer composition of propylene polymers and to articles obtained therefrom by means of injection casting technique. Composition is characterized by melt flow rate value (MFR 2) as measured according ISO method 1133 at 230°C under loading 2.16 kg within a range of 3 to 30 g/10 min and contains: (A) 50 to 90 wt % one or several propylene polymers including at least 85 wt % of fraction insoluble in xylene at room temperature and selected from group consisting of random propylene-ethylene copolymers with 1-7 wt % ethylene, propylene/C4-C8-α-olefin copolymer with 2-10 wt % C4-C8-α-olefins, propylene-ethylene/C4-C8-α-olefin copolymers with 0.5-5 wt % ethylene and 2-6 wt % C4-C8-α-olefins; and (B) 10-50% propylene copolymer containing 8-40 wt % ethylene and optionally 1-10 wt % C4-C8-α-olefins. Above-mentioned melt flow rate value MFR 2 for composition is obtained by way of destroying composition precursor containing the same A and B copolymers in above-mentioned proportions but differing in melt flow rate value (MFR 1), which ranges from 0.1 to 5 g/10 min. while MFR 2/MFR 1 ratio varies between 1.5 and 20. Articles made from the composition are characterized by good flexibility, good resistance against impact loads even at low temperatures, good optical properties, in particular opacity, and low level of chemicals emission.

EFFECT: improved consumer's properties of articles obtained from composition.

6 cl, 2 tbl, 8 ex

Up!