Rubber mixture, preparation method thereof and cured rubber produced therefrom
FIELD: rubber industry.
SUBSTANCE: invention relates to rubber mixture, method of its production and cured rubber from it. Rubber mixture contains non-crosslinked rubber and rubber particles, having radiation cross-linked structure, dispersed in it. Particles of rubber, are particles of synthetic rubber and/or natural rubber particles with average particles size from 20 to 500 nm and content of gel of 60 wt%. or more. Non-crosslinked rubber is butadiene-styrene rubber. Weight ratio of rubber particles, having radiation cross-linked structure, and non- cross-linked rubber ranges from 1:99 to 20:80. Rubber mixture is produced by mixing of components, containing non- cross-linked rubber latex and rubber particles latex, having radiation cross-linked structure, and their subsequent coagulation. Rubber particles latex, having radiation cross-linked structure, is rubber latex after radiation cross-linking.
EFFECT: invention allows to improve rolling resistance, resistance to slipping on wet road and wear resistance of cured rubber from rubber mixture.
10 cl, 9 tbl, 5 ex
SUBSTANCE: invention relates to polymeric latexes that can be used in adhesive compositions, which provide improved bonding of rubber articles to rubber reinforcing articles. The adhesive composition includes a single or a blend of polymeric latexes comprising a conjugated aliphatic monomer, a vinylaromatic monomer, a vinylpyridine monomer, and a nitrogen-containing monomer comprising a reactive N-methylol or N-alkoxy-functionality. The composition may contain a polymer component. A method for preparing reinforced rubberised articles using the said adhesive composition.
EFFECT: claimed composition allows for reduced amounts of the vinylpyridine monomer in the latex, and enhances the bonding properties of the adhesive composition. Use of the adhesive composition provides economic and chemical advantages for the preparation of reinforced rubberised articles.
16 cl, 3 ex
FIELD: personal use articles.
SUBSTANCE: invention relates to dipped articles based on natural latex, in particular, to protective gloves used as personal protection equipment as part of kits for protection of personnel at chemically hazardous facilities. The natural caoutchouc cased composition for gloves manufacture includes butadiene-styrene latex, oleic acid, thiourea, black carbon, polymethylsiloxane liquid (PSM-200), dibutilphthalate, potassium hydroxide, naphtam-2, casein, ammonia water solution, NF disperser, zinc diethyl-dithiocarbamate, zinc oxide, sulphur.
EFFECT: invention enables improvement of the gloves resistance to hazardous chemicals.
SUBSTANCE: invention relates to production of polished fabric-based instruments and particularly to compositions for making polished instruments, and can be used in polishing surfaces of different articles made from steel and different alloys, e.g. for polishing cutlery, art objects, jewellery, as well as processing threads and fabric, giving them good physical and chemical properties. The composition contains the following in pts. wt: 35-60 aqueous dispersion of butadiene styrene or styrene acrylate, 2.0-5.0 aqueous emulsion of silicon fluid, 1.0-3.0 benzylidene aniline oligomer with molecular weight of 3000-5000 and containing primary amine groups 0.3-0.5 wt %, secondary amine groups 5-7 wt % and 33.5-61.5 water.
EFFECT: making a polished fabric-based instrument with high wear resistance owing to higher water resistance, high heat resistance and good physical and mechanical properties at high temperatures, low water absorption.
5 tbl, 8 ex
SUBSTANCE: aqueous dispersion contains: a) from 51 to 90 wt % polymer particles of basic latex and b) from 10 to 49 wt % polymer particles of reinforcing latex, containing structural links of aromatic vinyl monomers and conjugated diene monomers. Amount of latex is given in terms of total mass of polymer particles in the rubber dispersion. Polymer particles of the reinforcing latex have a single glass transition temperature (Tg) from -25°C to 28°C, measured through differential scanning calorimetry (DSC). The polymer particles of the basic latex have Tg, measured through differential scanning calorimetry, lower than Tg of particles of the reinforcing latex.
EFFECT: obtaining required hardness of the obtained foamed latex with relatively high hysteresis, which can be easily regulated, while retaining constant hardness.
19 cl, 1 tbl, 18 ex
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
FIELD: tire industry.
SUBSTANCE: pneumatic tire tread includes cross-linking rubber mix containing at least one elastomer copolymer of styrene and butadiene in emulsion and reinforcing material including prevailing gas soot in mix in amount equal to or higher than 55 pce. Copolymer includes emulsifier in amount changing from 1 to 3.5 pce (mass parts per 100 parts of elastomer).
EFFECT: improved wear resistance of tire tread.
10 cl, 4 tbl
FIELD: tire industry.
SUBSTANCE: pneumatic tire tread includes cross-linking rubber mix containing at least one elastomer copolymer of styrene and butadiene in emulsion and reinforcing material including prevailing white filler present in rubber mix in amount equal to or higher than 40 pce. Copolymer includes emulsifier in amount changing from 1 to 3.5 pce (mass parts per 100 parts of elastomer).
EFFECT: increased wear resistance of tire tread.
11 cl, 4 dwg
SUBSTANCE: invention relates to a modifier, a method of obtaining a modified polymer and the modified polymer of a conjugated diene. The modifier for the polymer of the conjugated diene is obtained as a result of the complete condensation for a silicon-containing compound, which has a protected primary amino group and hydrolysable groups. The method of obtaining the modified polymer based on the conjugated diene includes a stage of modification and stage of the protection withdrawal. The tage of the protection is carried out after the completion of modification, and the used polymer based on the conjugated diene is preferably such that 10% of its polymer chains possess live and pseudolive properties.
EFFECT: modified polymer based on the conjugated diene is characterised by an excellent ability of small heat release and resistance to abrasion, which is used in a caoutchouc composition for the pneumatic tread.
13 cl, 4 tbl, 23 ex
SUBSTANCE: bitumen composition includes petroleum road bitumen BND 90/130, SKS-30ARKM-15 or SKS-30ARK rubber and polyethylene polyamine production wastes as an adhesive additive, with the following ratio of components, wt %: BND 90/130 bitumen - 83-93, SKS-30ARKM-15 rubber - 5-10 and polyethylene polyamine production wastes - 2-7 or BND 90/130 bitumen - 86-95, SKS-30ARK rubber - 3-7 and polyethylene polyamine production wastes - 2-7. The method of producing the bitumen composition is carried out by mixing bitumen while heating with a rubber-containing component and an adhesive additive, wherein the rubber is added in the form of 8-12% solution in an organic solvent, wherein the solvent used is hydrocarbons with final boiling point of no higher than 130°C. Preparation of the rubber solution in the solvent is carried out at 40-50°C while mixing for 5-6 hours. The obtained rubber solution and adhesive additive are then added to the bitumen. The mixture is homogenised for 3-4 hours while gradually raising temperature to 160-170°C. Further mixing is carried out until achieving 97% removal of the solvent. The remaining amount of solvent is removed by blowing with nitrogen.
EFFECT: obtaining a homogenous bitumen binder, having improved physical and mechanical properties.
4 cl, 2 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to production of moulded articles containing polybutadiene and can be used in tire production as moulded strips for tire sidewalls or treads. Polybutadiene with content of cis-isomer over 95% and polydispersity lower than 2.5 is mixed with highly dispersed silicic acid and/or carbon black and with cross-linking agents, sulphur or sulphur donors, extra process additive and subjected to extrusion at 40-75°C.
EFFECT: higher quality of processing the mixes and quality of formed articles with lower rolling resistance and abrasion.
5 cl, 1 dwg, 2 tbl
SUBSTANCE: invention relates to silane-containing caoutchouc mixtures with functionalised diene caoutchoucs and microgels, to method of their obtaining and application in automobile tyres. Caoutchouc mixture, containing caoutchouc, functionalised with hydroxyl, and/or carboxyl groups, and/or their salts, contains caoutchouc from repeating units based on 1,3-butadiene and styrene and silane of the given formula. Caoutchouc mixture can contain styrene-butadiene gel with index of swelling in toluene 1-25 and size particle from 5 to 1000 nm.
EFFECT: invention makes it possible to obtain resistant to wet sliding and possessing low rolling resistance - resistance in the process of steering of automobile tyre-treads with high wear-resistance.
9 cl, 4 tbl
SUBSTANCE: method of producing conjugated diene rubber includes: (a) a step of reacting a first alkoxysilane compound whose molecule contains a group which can be converted to an onium ion by an onium ion generator, and an alkoxysilyl group which contains two alkoxy groups with a conjugated diene polymer which contains an active terminal atom of an alkali metal or an alkali-earth metal. The polymer is obtained by polymerising a conjugated diene compound and an aromatic vinyl compound to obtain a modified conjugated diene polymer which contains a group which can be converted to an onium ion, and an alkoxysilyl group, and (b) a step of mixing the obtained modified conjugated diene polymer with an onium ion generator and a second alkoxysilane compound whose molecule contains one alkoxysilyl group and one group which can be converted to an onium ion by an onium ion generator. The groups, which can be converted to an onium ion, in the first alkoxysilane and second alkoxysilane compounds are selected from a group of compounds.
EFFECT: reduced hysteresis loss and fuel efficiency in motor tyres.
7 cl, 4 tbl, 25 ex
SUBSTANCE: anticorrosive coating composition contains DST-30-01 thermoplastic butadiene-styrene, an oligomer and a solvent, wherein the oligomer used is triethylene glycol dimethacrylate, the solvent used is toluene, and the composition further includes a photoinitiator - 2,2-dimethoxy-1,2-(diphenyl)ethanone.
EFFECT: faster preparation of the coating composition and direct formation of an anticorrosive coating.
2 cl, 1 tbl
SUBSTANCE: rubber mixture based on butadiene-methyl styrene caoutchouc includes sulphur, diphenylguanidine, sulfene amide C, technical carbon, zinc oxide, stearic acid, as preservative and modifier of 2-(dimethylaminomethyl)-4-methyl-6-(1,7,7-trimethylbicyclo[2.2.1]hept-exo-2-yl)phenol 2-4 wt.p. per 100 wt.p. of caoutchouc.
EFFECT: invention makes it possible to increase confection adhesiveness with preservation of high stability to ageing of rubber mixture vulcanisate.
3 tbl, 1 ex
SUBSTANCE: invention relates to petrochemical industry, particularly production of butadiene-styrene rubber obtained by emulsion copolymerisation, and methods for filling thereof at a latex step, and can be used in producing industrial rubber articles. The method of producing filled butadiene-styrene rubber involves emulsion copolymerisation of butadiene with styrene in the presence of radical initiators, stoppering the process, degassing, adding an antioxidant and fibre filler - cotton, viscose, capron fibre or a mixture thereof, separating rubber from latex by coagulation in the presence of a coagulation agent and 2% sulphuric acid solution, washing and drying rubber crumbs. The fibre filler is used at the coagulation step in the composition of a compound coagulation agent consisting of 5-30% aluminium chloride solution, added in amount of 2.0-3.0 kg/t rubber, and fibre filler added in amount of 1.0-10.0 kg/t rubber.
EFFECT: method increases process efficiency, intensifies the rubber drying process, reduces consumption of the coagulation agent, stabilises the process of separating rubber from latex and reduces environmental pollution with products of producing rubber by emulsion copolymerisation.
1 tbl, 10 ex
SUBSTANCE: invention relates to the rubber industry and can be used in making industrial rubber articles. The butadiene-methylstyrene rubber based rubber mixture contains sulphur, diphenyl guanidine, a vulcanisation accelerator, technical carbon, zinc oxide, stearic acid, an anti-ageing agent and a modifier. The vulcanisation accelerator used is sulphenamide Ts, the anti-ageing agent and modifier are 2-(dibutylaminomethyl)-4-methyl-6-(1,7,7-trimethylbicyclo[2.2.1]hept-exo-2-yl)phenol.
EFFECT: high building tack while maintaining high ageing resistance of the butadiene-methylstyrene rubber based rubber mixture.
3 tbl, 4 ex
SUBSTANCE: invention relates to rubber industry and can be used in making wear-resistant rubber articles for construction purposes, operating in conditions of intense wear, low temperatures and aggressive media. The oil-and-petrol resistant rubber mixture contains butadiene-nitrile rubber BNKS-40AMN, isoprene rubber SKI-3, methyl styrene rubber SKMS-30 ARKM-15, sulphur, sulphenamide Ts, stearine, technical carbon P324, zinc oxide, regenerate RShT, thiuram D, kaolin, petroleum bitumen, naphtham-2, oil I-8A, N-nitrosodiphenylamine, and process additives - dispractol KS and a mixture of diphenyl carbonate and dimethyl carbonate resin DFK-1.
EFFECT: invention reduces the cost of the rubber mixture owing to use of cheaper process additives, and increases nominal tensile strength and breaking elongation, and reduces the abrasion index.
SUBSTANCE: present invention relates to a pneumatic object. Pneumatic object is described which is provided with an elastomeric layer which is impermeable for inflating gas, wherein said impermeable elastomeric layer contains at least one thermoplastic styrene elastomer with block polyisobutylene, characterised by that said impermeable elastomeric layer additionally contains plasticising oil in amount of more than 5 to less than 150 phr (weight parts per 100 parts elastomer) and polyphenylene ether (PPE), where the polyphenylene ether is selected from a group consisting of poly(2,6-dimethyl-1,4-phenyl ether), poly(2,6-dimethyl-co-2,3,6-trimethyl-1,4-phenyl ether), poly-(2,3,6-trimethyl-1,4-phenyl ether), poly(2,6-diethyl-1,4-phenyl ether), poly(2-methyl-6-ethyl-1,4-phenyl ether), poly(2-methyl-6-propyl-1,4-phenyl ether), poly(2,6-dipropyl-1,4-phenyl ether), poly(2-ethyl-6-propyl-1,4-phenyl ether), poly(2,6-dilauryl-1,4-phenyl ether), poly(2,6-diphenyl-1,4-phenyl ether), poly(2,6-dimethoxy-1,4-phenyl ether), poly(1,6-diethoxy-1,4-phenyl ether), poly(2-methoxy-6-ethoxy-1,4-phenyl ether), poly(2-ethyl-6-stearyloxy-1,4-phenyl ether), poly(2,6-dichloro-1,4-phenyl ether), poly(2-methyl-6-phenyl-1,4-phenyl ether), poly(2-ethoxy-1,4-phenyl ether), poly(2-chloro-1,4-phenyl ether), poly(2,6-dibromo-1,4-phenyl ether), poly(3-bromo-2,6-dimethyl-1,4-phenyl ether), corresponding copolymers thereof and mixtures of said homopolymers or copolymers, and that the weight fraction of the polyphenyl ether ranges from more than 0.05 to less 5 times the weight fraction of styrene present in the thermoplastic styrene elastomer itself.
EFFECT: improved heat resistance and gas-impermeability of the gas-impermeable layer of the pneumatic object.
16 cl, 1 dwg, 3 tbl, 3 ex