The rubber mixture

 

(57) Abstract:

The invention relates to the production of rubber mixtures based on diene rubbers and can be used in footwear, rubber and tire industry. The rubber mixture comprises diene rubber, sulfur, zinc oxide, a vulcanization accelerator, a retarder of podocarpaceae - phthalic anhydride, antioxidant, plasticizer and carbon black, and as the diene rubber is a copolymer of butadiene, styrene and methyl ester of methacrylic acid with a mass content of linked monomers in the copolymer 68-85:11-20: 4-12, respectively. Prepare the rubber mixture in the following ratio, wt. hours : the specified copolymer of butadiene, styrene and methyl ester of methacrylic acid, 100, 1-3 sulfur, zinc oxide 3,0-5,5, vulcanization accelerator 1-3, the moderator of podocarpaceae 0,5-1,0, antioxidant 1-5, plasticizer 5-20, carbon 20-70. The technical result of the invention is to improve the dynamic properties, tear resistance, wear resistance and friction coefficient of the vulcanizates. table 2.

The invention relates to the field of production of rubber mixtures based on diene rubbers and can be used in a Shoe, cut the rubber, modified ester groups, which includes 7 and 10 mol.% carbonitepreinstaller.exe, including calcium hydroxide, sulfate dihydrate calcium, Santoku, stearin, zinc oxide, carbon black and sulfur or dimethylglyoxime (Gewirtz E. J., Kaplun Meters, and other Properties on BNR rubbers containing ester groups. Rubber and rubber. - M.: Tsniiteneftehim, 1972, 9, S. 8-10).

Also known rubber mixture based on BNR rubber modified ester groups, containing 4 and 10 wt.% isopropylcarbodiimide, including stearic acid, dihydrate calcium sulfate and calcium hydroxide (Smirnova T. A., Morozov, Y. L. et al. On the mechanism of vulcanization of rubbers with ester groups of high reactivity. The production of tires, rubber and asbestos products. - M.: Tsniiteneftehim, 1974, 12, S. 1-3).

Known rubber mixture based on the best choice of rubber modified ester groups, which contains 30% styrene and ethylcarboxylate 5 and 10%, including stearic acid, zinc oxide, triethanolamine, glycerin, petrolatum technical, soot, chalk, gypsum, gidrologo rubber with ester groups. The production of tires, rubber and asbestos products. - M.: Tsniiteneftehim, 1973, 1, S. 1-3).

All of the above rubber mixtures based on diene rubbers modified with ester groups, have delayed vulcanization and require complex vulcanizing agents (salt and sulfuric agents, vulcanization) and in larger quantities than for conventional vulcanization of rubbers, for example the best choice. In addition, the vulcanizates of the above rubber compositions have high stiffness (modulus at 300% elongation experienced rubbers is several times the modules rubbers on the basis of unmodified on BNR rubbers SKN-26M or the best choice SCS-ARK), low tear resistance and dynamic endurance.

Known rubber mixtures based on the best choice of rubber emulsion polymerization (BSC) or a mixture of it with a rubber solution polymerization - polybutadiene (ACS) and/or polyisoprene (SKI-3), including sulfur, zinc oxide, stearic acid, moderator of podocarpaceae, antioxidant, antiozonant and preciousmetal, wax, plasticizer, rubrics or coumaroneindene tar, soot (A. C. Saltykov. The basis of the ve above-mentioned rubbers have insufficient resistance to repeated tensile and tear propagation, in addition, due to poor technological properties of rubber SKD, the most suitable for the tread rubber can only be used in blends with other rubbers (SKI-3 or SCS-apkm-15), which complicates the manufacturing technology of rubber compounds.

Closest to the technical essence and the achieved result to the present invention is a rubber mixture comprising 70 wt.h. the best choice of rubber BSC, 30 wt.h. butadiene rubber SKD, 1.8 wt.h. sulfur, 1.3 wt.h. of a vulcanization accelerator, a 0.7 wt.h. moderator of podocarpaceae - phthalic anhydride, 3.0 mass.h. antioxidant, 2.0 wt.h. the microcrystalline wax, of 11.0 wt.h. plasticizer, 3.0 mass.h. rubrics or coumaroneindene resin, 60,0 wt.h. active carbon black, 3.0 mass.h. zinc oxide, 2.0 wt.h. stearic acid (A. C. Saltykov. The foundations of modern technologies of automobile tires. - M.: Chemistry, 1974, S. 130).

The disadvantages of the known rubber compounds are low tear resistance and dynamic endurance, not good enough traction with the road.

The technical object of the present invention is to improve the dynamic characteristics of the vulcanizates, increased tear resistance, durability and rubber, sulfur, zinc oxide, a vulcanization accelerator, a retarder of podocarpaceae - phthalic anhydride, antioxidant, plasticizer and carbon black, as the diene rubber contains a copolymer of butadiene, styrene and methyl ester of methacrylic acid with a mass content of linked monomers in the copolymer 68-85:11-20:4-12, respectively, in the following ratio, wt.h.:

The specified copolymer of butadiene, styrene and methyl ester of methacrylic acid - 100,0

Sulfur - 1,0-3,0

Zinc oxide - 3,0-5,5

The accelerator of vulcanization - 1,0-3,0

The moderator of podocarpaceae - phthalic anhydride - 0,5-1,0

Antioxidant - 1,0-5,0

Plasticizer - 5,0-20,0

Carbon - 20,0-70,0

In the implementation of the proposed technical solution use:

- copolymer of butadiene, styrene and methyl methacrylate obtained by the emulsion copolymerization of the corresponding monomers in the presence of as an emulsifier distilled tall oil in THE 38.403122-97 "synthetic Rubber Reselect-2M";

as moderator of podocarpaceae - phthalic anhydride.

As the vulcanization accelerator, an antioxidant, a plasticizer can be used in a variety of prophetic is the amount of a vulcanization accelerator - sulfenamid C, N,N'-diphenyl-guanidine, tetramethylthiuramdisulphide (thiuram E);

- as an antioxidant, given OP, acetonyl R, wax protective 3B-1;

as the plasticizer is stearic acid, oil MO-s, rubrics, October N, rosin.

The rubber mixture is prepared by mixing on a roll mill at a temperature of 705oAnd the gap between the rollers 0.6-0.8 mm for 30 minutes

Before vulcanization of the rubber mixture was kept at room temperature for 20-24 h

The vulcanization is carried out in a hydraulic press at a temperature of plates 155oFor 20, 25, 30, 40, 60 minutes

After determining the optimum vulcanization samples for the determination of physico-mechanical characteristics of pressed and experience in accordance with the following normative-technical documentation:

conditional stress at 300% elongation, conditional tensile strength, elongation at break and the relative residual deformation after the break is determined according to GOST 270-75,

hardness shore a - GOST 263-75,

the elastic rebound - according to GOST 27110-86,

tear resistance - according to GOST 262-79,

resistance to repeated tension - according to GOST 261-79,

the resistance of the bit/BR> For the preparation of rubber mixtures charge 100 wt.h copolymer of butadiene, styrene and methyl ester of methacrylic acid with a mass content of linked monomers in the copolymer 68:20:12, respectively (sample 1), 3.0 mass. including sulfur, 3.0 mass.h. of zinc oxide as a vulcanization accelerator to 1.0 wt.h. sulfenamide C, 0.7 wt.h. phthalic anhydride, as an antioxidant - 0.5.h. diafana OP and 0.5.h. wax protective 3B-1, as a plasticizer - 2.0 wt.h. stearic acid and 3.0 wt.h. rosin, 20.0 wt.h. carbon black N 234.

The rubber mixture is prepared as described above. The finished rubber mixture is subjected to tests to determine physical and mechanical characteristics.

Rubber compound shown in table 1, the results of the tests in table 2.

Example 2

The rubber mixture is prepared as in example 1, but take 100 wt.h. copolymer of butadiene, styrene and methyl ester of methacrylic acid with a mass content of linked monomers in the copolymer 85:11:4, respectively, 2.5 wt. including sulfur, 4.5 wt.h. of zinc oxide as a vulcanization accelerator 1.5 wt. including sulfenamide C and 0.5.h. diphenylguanidine, 0,5 phthalic anhydride, as an antioxidant - 2.0 wt.h. acetonemia R, cacao carbon P 234.

Rubber compound shown in table 1, the results of the tests in table 2.

Example 3

The rubber mixture is prepared as in example 1, but take 100.0 wt.h. copolymer of butadiene, styrene and methyl ester of methacrylic acid with a mass content of linked monomers in the copolymer of 72:18:10, respectively, and 1.0 wt. including sulfur, 5.5 wt.h. of zinc oxide as a vulcanization accelerator and 1.8 wt.h. sulfenamide C and 1.2 wt.h. turama D, 1,0 wt.h. phthalic anhydride as an antioxidant to 1.0 wt.h. diafana OP, 2.0 wt.h. acetonemia P and 2.0 wt.h. wax protected 3V-1, as a plasticizer to 3.0 may. including stearic acid, 12.0 wt.h. oil MO-s, 3.0 mass.h. rubrics and 2.0 wt.h. octorara N, 70,0 wt.h. carbon black.

Rubber compound shown in table 1, the results of the tests in table 2.

Example 4 (prototype)

The rubber mixture is prepared as in example 1, but take 70,0 wt.h. butadiene-stiralnaja rubber SKS-ARKM-15, 30.0 wt.h. butadiene rubber SKD, 1.8 wt.h. sulfur, 3.0 mass.h. of zinc oxide as a vulcanization accelerator to 1.3 wt.h. sulfenamide C, 0.7 wt.h. phthalic anhydride as an antioxidant to 1.0 wt.h. diafana OP, 2.0 wt.h. atsinanana P and 2.0 wt. including wax protect the carbon P 234.

Rubber compound shown in table 1, the results of the tests in table 2.

As can be seen from the data presented in examples 1-4 and tables 1, 2, the inventive rubber mixture exceeds known for resistance to repeated tension, resistance to tear propagation and abrasion resistance.

The rubber mixture, comprising a diene rubber, sulfur, zinc oxide, a vulcanization accelerator, a retarder of podocarpaceae - phthalic anhydride, antioxidant, plasticizer and carbon black, characterized in that the diene rubber mixture contains a copolymer of butadiene, styrene and methyl ester of methacrylic acid with a mass content of linked monomers in the copolymer 68-85:11-20:4-12, respectively, in the following ratio, wt.h.:

The specified copolymer of butadiene, styrene and methyl ester of methacrylic acid - 100,0

Sulfur - 1,0-3,0

Zinc oxide - 3,0-5,5

The accelerator of vulcanization - 1,0-3,0

The moderator of podocarpaceae - phthalic anhydride - 0,5-1,0

Antioxidant - 1,0-5,0

Plasticizer - 5,0-20,0

Carbon - 20,0-70,0 e

 

Same patents:

The invention relates to the rubber industry, in particular to compositions for bottom shoes

The invention relates to the rubber industry

The invention relates to thermoplastic compositions based on mixtures of polymers and copolymers of styrene

The rubber mixture // 2181367
The invention relates to the rubber industry, in particular rubber compound on the basis of butadiene-styrene and ethylene-propylene rubber

The invention relates to the field of production of bitumen-polymer compositions used in road construction in obtaining polymer-bitumen binders in the manufacture of roofing and waterproofing materials, sealants, mastics

The invention relates to a process of manufacturing rubber ebonite products can be used in aviation, engineering, agriculture, medicine and everyday life

The invention relates to compositions of macromolecular compounds, namely, bituminous materials, and can be used, for example, in the manufacture of an expansion joint for road bridges

The invention relates to variants of the rubber with fillers, including slag ferrography camerascamera, and can be used in the manufacture of rubber products

The invention relates to railway industry and can be used to produce compositions for nachalnik gaskets

The invention relates to railway industry and can be used to obtain compositions for nachalnik rubber gaskets

Amylovora liquid // 2198206
The invention relates to compositions omalovanky liquid for wetting the surface of the rubber tires before putting them on the rims of the wheels of motor vehicles, tractors and other machinery

The invention relates to treated silicas suitable for use in semi-conducting compounds, such as used in electric cables

The invention relates to mixtures of organochlorosilanes with a high proportion of disulfiram and to a method for containing these compounds and rubber composites
The invention relates to the production of azomethines used as accelerators for rubber compounds

The invention relates to a chemical compound, namely N,N'-bis(m-phenoxyphenylacetic)-p-benzene, which can be used as a promoter of adhesion of the rubber to textiles and protivostaritel vulcanization of chouchkov
The invention relates to the processing of rubber mixtures, in particular for manufacturing reinforced rubber articles such as bodies of rotation

The invention relates to the chemical, petrochemical, rubber, aircraft, etc

The rubber mixture // 2193583
The invention relates to the rubber industry, in particular to the compounds based on fluorine, and can be used for manufacturing, for example, Salnikov
Up!