Copolymers with acrylonitrile (C08L9/02)

Electrically insulating composition // 2642567
FIELD: cable industry.SUBSTANCE: invention relates to the cable industry, namely to polymer electrical insulating compositions intended for use in cable structures, operated in conditions of increased fire hazard and low temperatures when exposed to diesel fuel and lubricating oils. Electrically insulating composition contains, by weight: copolymer of butylene phthalate and polybutylene glycol with butylenphthalate (50–95) wt % and polybutylene glycol (5–50) wt % – 20–90, polyethylene wax 1–5, high molecular weight polydimethylsiloxane 2–20, additionally contains aluminum hydroxide Al(OH)3 or magnesium hydroxide Mg(OH)2 100–200, copolymer of ethylene with octene, or ethylene with vinyl acetate, or copolymer of butadiene with acrylonitrile, or copolymer of styrene with butadiene 8–60, high-density polyethylene modified with maleic anhydride 2–20.EFFECT: technical result – invention makes it possible to provide a high degree of incombustibility, a lower rate of emission of smoke and hydrogen chloride during combustion in combination with increased resistance to diesel fuel and lubricating oils, as well as resistance to low temperatures.1 cl, 8 tbl, 4 ex

Refractory polymer composition // 2640769
FIELD: chemistry.SUBSTANCE: invention relates to the refractory polymer composition suitable for use when applying the coating on the treated articles containing thermoplastic polymer containing vinyl acetate, and an unsaturated elastomer containing double bonds as polymeric components, where the polymer components are present in the form of a homogeneous polymer blend, and where a composite matrix is formed, vulcanized only with the use of sulfur or a crosslinking system containing sulfur, where the sulfur crosslinking system is distributed throughout the matrix and fully penetrates into the matrix, and at least one flame retardant or a combination of flame retardants. The invention further relates to articles obtained from such a composition and to composite elements coated with the composition as well as to the method for their preparation.EFFECT: producing compositions for protecting a dynamically tense component with a coating of this composition, so that the aggregate component is sufficiently refractory, in particular, complies with the standard for fire safety CEN TS 45545-2 without rendering noticeable adverse effects by the specified coating on the dynamic properties of the composite element during its service life.38 cl, 16 dwg, 5 tbl, 5 ex
ethod of elastomer surface modification // 2640768
FIELD: chemistry.SUBSTANCE: method of surface modification of elastomeric material based on butadiene-nitrile rubber in the form of rubber products involves the treatment of a vulcanizate of the elastomeric material with a solution of the modifying composition - 10-15% solution of fluorinated limit hydrocarbon C20H33F9 in 1,1,2-trifluoro-1,2,2-trichloroethane for 10-20 h at 20±0.5°C. The process is carried out in one stage. After processing, the rubber product is dried to a constant weight.EFFECT: invention makes it possible to simplify the technological process by reducing the stages and time, to ensure technological and environmental safety of production The invention also allows to improve the physical-mechanical characteristics of vulkanizate, lower coefficient of friction and abrasion resistance of elastomeric materials based on butadiene-nitrile rubber on various substrates in their process of the friction contact.3 tbl, 4 ex
Composition for manufacturing heat-protective coating and method of its manufacture // 2640523
FIELD: chemistry.SUBSTANCE: composition for manufacturing a heat-protective coating and a method for manufacturing it are described. Composition for manufactureing a heat-protective coating includes components in the following ratio, pts wt: furfural 8.0-12.5, urotropin 0.9 -1.8, phenol-formaldehyde resin of the novolak type 8.0-14.0, butadiene-nitrile rubber SKN-40-KNT in the form of a 20% solution of the dry residue in acetone 28.0-33.0, acetone 4.0-7.0, butyl acetate 4.0-7.0, talc 18.0-23.0, mica 10.0-14.0. The method of obtaining the composition includes pretreatment of furfural, hexamine, phenol-formaldehyde resin of the novolak type into the condensation product by reacting a solution of urotropine in furfural followed by the introduction of phenol-formaldehyde resin and the formation of the binder on their basis. Then a solution of butadiene-nitrile rubber SKN-40-KNT in acetone, solvents and fillers are introduced.EFFECT: increase of mechanical properties, resistance to oxidation of a semi-finished product, increase and stability of physical properties of the composition during its production, storage, and processing.3 cl, 2 tbl
High-density vibro-damping elastomeric materials // 2637689
FIELD: chemistry.SUBSTANCE: invention relates to the production of high-density vibro-damping elastomeric materials used to reduce or eliminate vibrations. A vibro-damping elastomeric material contains, wt %: a mixture of butadiene-nitrile rubber with a content of acrylic acid nitrile of 17-20 % - 10-30 and butadiene-nitrile rubber with the content of acrylic acid nitrile of 36-40 % - 10-30, a curing system - 1.8 to 12.0, filler lithopone or barium sulfate, or chalk - 25-70, resin - 0.5-2.0 and pigments - 2-12.EFFECT: invention makes it possible to improve the physicomechanical, vibro-damping properties and to increase the oil and petrol resistance of the material.5 cl, 2 tbl
Oil-and-petrol resistant rubber mixture // 2633892
FIELD: chemistry.SUBSTANCE: mixture contains butadiene-nitrile rubber SKN 4045, isoprene rubber SKI-3, methylstyrene rubber SKMS-30 ARC, cis-butadiene rubber, sulfur, dibenzthiazolyl disulphide, tetramethylthiuram disulfide, zinc oxide, anti-corrosion ZPR, stearic acid, acetonanil H, resin "Shinplast", bitumen oil, technical carbon H 220, talc, dibutyl sebacate.EFFECT: expanding the temperature range of the operability of rubber parts, increasing the resistance to repeated bending without disturbing the structure of parts, reducing the change in mass of oil, oil and fuel environment while maintaining high tensile strength and elongation at break.2 tbl

Composition of swellable packer with response delay // 2631301
FIELD: chemistry.SUBSTANCE: borehole sealant with a controlled swelling speed is described, which contains a composition comprising: a polymer comprising a nitrile-based polymer or ethylene-propylene-diene copolymer rubber; an absorbent, wherein this absorbent comprises an acrylic copolymer; a primary cross-linked network structure comprising primary bonds between the polymer chains; and a secondary cross-linked network structure including secondary bonds between the absorbent molecules, wherein the secondary bonds are formed by a crosslinking reagent comprising titanate, zirconate, aminocarboxylic acid, metal chelate, borate, ketal or a combination thereof, and wherein the secondary bonds are destroyed by varying the value of pH, temperature, pressure, salinity, or a combination thereof, while the primary bonds remain unaffected under the same conditions; and wherein the sealant swells and seals the bore as a result of destruction of the secondary cross-linked network structure. A method for controlling the swelling speed of a borehole sealant, a composition for forming a borehole sealant, a system for sealing a wellbore, and a borehole sealant with a controlled swelling speed are also described.EFFECT: borehole sealant with an adjustable swelling speed is obtained.39 cl, 9 dwg
ethod of producing electroproductive rubber volcanizate with carbon filler // 2630806
FIELD: chemistry.SUBSTANCE: method involves curing a rubber mixture at the temperature of 150°C, containing, wt %: SKN-18 - 40 rubber, a vulcanization polysulphide accelerator - 12, dibutyl phthalate - 1, diamine - 1, phthalic anhydride - 1, a carbon filler - 40, regenerate - 5. Herewith the carbon filler material used is the carbonaceous material of the fibrous structure obtained by thermocatalytic pyrolysis of gas condensate from the natural gas purification system at the compressor station of the main gas pipeline under conditions of contact with the iron oxide catalyst Fe2O3 at atmospheric pressure and at the temperature of 600-700°C, a bulk feed rate of 25 ml/min, for 5 hours, followed by cooling to 20°C and screening of 50-150 mcm fraction by fractionation of the formed carbon mass on molecular sieves. The finished rubber vulcanizate is subjected to additional heat treatment in a thermostat at the temperature of 250°C for 3 hours.EFFECT: increasing the yield of the target product, the relative stability of the conductive properties over time, and simplifying the technology for producing the product.3 tbl
Rubber mixture // 2626364
FIELD: chemistry.SUBSTANCE: rubber mixture contains hydrogenated butadiene-nitrile rubber, butadiene-nitrile rubber, vulcanizing agent - novoperox "БП-40", vulcanization activators - zinc stearate and magnesia burnt, antioxidant - agidol-2, fillers - carbon black "Н" 220 and carbon black "П" 514, plasticiser - dibutyl phthalate, rubber lubricant - polymethylsiloxane liquid-200, modifier - thiokol "НВБ-2" and co-agent of peroxide cure. The mixture additionally contains an antioxidant - diaphene "ФП", retarder scorch - captax, technological additive lubstab-01 or oxanol "ЦС-100", and as co-agent of peroxide cure contains deltagran 50DL.EFFECT: improvement of the conditional tensile strength, tear strength by improving the dispersion of the components of the mixture in the matrix of rubbers and the high resistance of the rubber to aging in aggressive hydrocarbon media at elevated temperatures.2 tbl, 4 ex
Composite oil-swellable material // 2625108
FIELD: chemistry.SUBSTANCE: composite oil-swellable material includes, pts. wt.: butadiene-nitrile rubber with the content of nitrile acrylic acid 17-20% - 40.0-50.0, isoprene rubber SKI-3 - 50.0-60.0, sulfur - 0.5-0.9, sulfenamide C - 1.5-2.5, N, N'-dithiodimorpholine - 1.5-2.5, tiuram D - 1.5-2.5, anti-seizure "ZPR" - 0.3-0.5, zinc oxide 2.5-3.5, zinc stearate 4.0-5.0, stearic acid 1.0-2.0, naphtham-2 1.5-2.0, technical carbon H 220-25.0-3.0, taurite TS-D - 14.0-16.0, resin "Shinplast" - 4.0-5.5, oxanol CS-100 - 2.0-3.0, dibutyl phthalate - 3.0-4.0, industrial oil I-12A - 24.0-32.0, trans-polynorbornene - 6.0-8.0.EFFECT: invention makes it possible to improve the tensile strength of the material and to achieve a certain degree of its volumetric swelling in petroleum, oil and fuel.2 tbl
Vulcanized compositions based on epoxy-containing group of nitrile rubber // 2622655
FIELD: chemistry.SUBSTANCE: composition comprises at least one epoxy group containing nitrile rubber which contains repeating units of one conjugated diene, at least one α,β-unsaturated nitrile and optionally one or more other copolymerizable monomers, but which lacks repeating units of nonconjugated cyclic polyenes; as crosslinking agent at least one Lewis acid; and at least one cross-linking accelerator selected from the group consisting thiurams, ksatogenaty, thiourea, dithiocarbamates and carbamates.EFFECT: invention produces vulcanizates with favorable performance compression set at room temperature, and at the same time a high tensile stress and elongation at break optimal.6 cl, 14 tbl, 4 ex
ethod of producing oil resistant thermoplastic rubber // 2619947
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing thermoplastic rubber (TPR) with high resistance to hydrocarbon oils, which can be used for making various elastic industrial rubber articles operating under conditions of contact with oil products. In method of producing oil resistant thermoplastic rubber mixing process is carried out in two steps. First step includes mixing polypropylene, butadiene-nitrile rubber and a modifier in form of organic peroxide and oligoester acrylate, containing at least two vinyl groups, or triazine derivative, containing at least two allyl groups. Second step includes mixing product of first step, olefin rubber, mineral oil, curing agent for rubber, which is an alkyl phenol formaldehyde resin and vulcanisation activator in form of tin dichloride or aluminium chloride.EFFECT: invention enables to obtain thermoplastic rubber, having high melt flow index with low oil absorption.1 cl, 3 tbl, 11 ex
Rubber mixture // 2612938
FIELD: chemistry.SUBSTANCE: invention refers to rubber industry, in particular to the production of rubber mixtures used for manufacture of sealing elements applied in the production of packer-anchor equipment for oil and gas industry. Rubber mixture contains butadiene-nitrile rubber of trademark BNKS-40 AMN, percadox BC-FF, irganox 1010, technical carbon N 220, technical carbon P514, oligoester acrylate MGF-9, oligoester acrylate TGM-3, triallyl isocyanurate, maleide F, zinc monomethyl acrylate, captax, novantox 8PFDA and technological additive Lubstab-01 or lubricant MA-L22.EFFECT: improved conventional tensile strength, relative elongation at rupture, tear resistance due to enhanced mixture ingredient dispersion in rubber matrix and high ageing resistance of rubber in aggressive hydrocarbon media at high temperatures.2 tbl, 4 ex

Vulcanized compositions based on epoxy groups containing nitrile rubbers // 2604218
FIELD: chemistry.SUBSTANCE: invention relates to vulcanized compositions based on epoxy groups containing nitrile rubbers. Vulcanized composition in the solid form contains nitrile rubber with epoxy groups, which contains repeating links, conjugated diene derivatives and α,β-unsaturated nitrile. As a cross-linking agent the composition contains Lewis or Brensted acid. Herewith the amount of other cross-linking agents is less than 2.5 wt% per 100 wt% of nitrile rubber with epoxy groups.EFFECT: vulcanizates as per the invention have extremely low residual compression at room temperature, 100 °C and 150 °C and are characterized by high tension stress and high breaking elongation.14 cl, 22 tbl

Rubber composition // 2602144
FIELD: chemistry.SUBSTANCE: invention relates to heat-resistant rubber mixture used for making rubber articles which can be used in oil and gas industry. Rubber mixture contains a combination of hydrogenated butadiene-nitrile rubber and butadiene-nitrile rubber, perkadox BC-FF, maleid F, zinc monomethacrylate, oligoester acrylates MGF-9 and TGM-3, naugard 445, irganox 1010, nickel dibutyl dithiocarbate, zincolet VV-222, colophony, stearic acid, calcined magnesia, taurid TSD, technical carbon N 220, technical carbon P 514, dew-ret 175, fibre filler - basalt, carbon, polyacrylonitrile fibre or mineral wool.EFFECT: improved tear resistance, resistance of rubber to thermal ageing in aggressive hydrocarbon media at high temperatures (up to 150 °C) and stabilisation of hardness of vulcanisate at level of 90 units Shore A.1 cl, 2 tbl

Rubber composition // 2595674
FIELD: rubber industry.SUBSTANCE: invention relates to rubber industry, in particular to production of rubber mixtures used for production of sealing elements used in production of packer-anchor equipment for oil and gas industry. Mixture contains a combination of hydrogenated butadiene-nitrile rubber and butadiene-nitrile rubber, zinc oxide, technical carbon N 220, technical carbon P 514, oligoester acrylates MGF-9 and TGM-3, herewith it additionally contains polymethylsiloxane liquid-200, "Shinplast" resin, rosil 175, deltagran HVA-2 70 GE, urotropine, resin SF-012A, acetonanil-H, irganox 1010, curing agent - novoperox TBK.EFFECT: technical result is improvement of properties of conventional tensile strength, tear resistance and hardness, high resistance of the rubber to ageing in aggressive hydrocarbon media at high temperatures.1 cl, 2 tbl, 3 ex

Highly saturated nitrile rubber composition and cross-linked rubber // 2590552
FIELD: chemistry.SUBSTANCE: invention relates to highly saturated nitrile rubber compositions, as well as cross-linked rubbers obtained from such rubber compositions. Composition comprises highly saturated nitrile rubber (A1) with iodine number equal to or less than 120, containing carboxyl groups, which contains α,β-ethylene unsaturated monomer links, monomer links of monoester α,β-ethylene unsaturated dicarboxylic acid and conjugated diene monomer links, highly saturated nitrile rubber (A2) with iodine number equal to or less than 120, which contains α,β-ethylene unsaturated monomer links, conjugated diene monomer links and optionally monomer links of monoester α,β-ethylene unsaturated dicarboxylic acid, polyamide resin (B) with fusion temperature of 100-300 °C, weight ratio of rubber (A1) and rubber (A2) ranges from 2:98 to 98:2 and ratio of content of polyamide resin (B) relative to total amount of rubber (A1) and rubber (A2) is weight ratio of “total amount of rubber (A1) and rubber (A2) : polyamide resin (B)” and ranges from 95:5 to 50:50. Said composition is cross-linked using a peroxide cross-crosslinking agent.EFFECT: obtained cross-linked rubbers have excellent physical properties, oil resistance, fuel resistance and tensile strength at high temperatures.9 cl, 1 tbl, 5 ex
Rubber mixture // 2583010
FIELD: oil and gas industry.SUBSTANCE: invention relates to heat-resistant rubber mixture for making rubber articles which can be used in oil and gas industry. Rubber mixture contains a combination of hydrogenated butadiene-nitrile rubber and butadiene-nitrile rubber, percadox BC-FF, maleide F, zinc methacrylate, MGF-9 and TGM-3 oligoester acrylates, naugard 445, irganox 1010, nickel dibutyldithiocarbamate, zincolet VV-222, colophony, stearic acid, burnt magnesium, thauri TS-D, technical carbon N 220, technical carbon P 514, rosil 175, fibre filler - aramid fibre or glass fibre.EFFECT: improved properties of rubber such as tear resistance, resistance to thermal ageing in aggressive hydrocarbon media at high temperatures of up to 150 °C, stabilisation and hardness of vulcanisate at level of 90 Shore A units.1 cl, 2 tbl
Glass textolite sfu // 2582706
FIELD: technological processes.SUBSTANCE: invention relates to production of foil-coated glass textolites used for production of printed circuit boards (PCB). Lined with one or two sides with metal foil glass textolite is made by pressing of foil and glass fabric. Glass fabric is impregnated with epoxy composition. Composition contains epoxy Diane resin, 4,4′-diaminodiphenylsulfone, nickel acetylacetonate, organosilicon titanium compound and filler submicron size powder of spherical particles of copolymer of butadiene, acrylonitrile, styrene, methacrylic acid. Invention increases stability of linear dimensions of glass-cloth laminate to 0.01 %.EFFECT: high stability of casting dimensions.1 cl, 1 tbl

Elastic thermoplastic ether-cellulose composition // 2573519
FIELD: chemistry.SUBSTANCE: elastic thermoplastic ether-cellulose composition includes cellulose acetate or cellulose acetobutyrate, a plasticiser, a stabiliser and a polymer modifier. As the polymer modifier butadiene acrylonitrile rubber is used and suspended polyvinyl chloride is further added. Components are in the following ratio, pts.wt: cellulose acetate or cellulose acetobutyrate - 100.0, plasticiser - 10-50, stabiliser - 0.50-2.00, butadiene acrylonitrile rubber - 20-100, suspended polyvinyl chloride - 10-100.0.EFFECT: composition improves the set of operational and consumer properties, thereby widening the field of use owing to increased elasticity.1 tbl, 5 ex
Vibration-damping elastomeric material and composition thereof // 2572409
FIELD: chemistry.SUBSTANCE: vibration-damping elastomeric material contains a copolymer of butadiene-nitrile rubber with acrylonitrile content of 23-30% and polyvinyl chloride, butadiene-nitrile rubber with acrylonitrile content of 32-49%, a curing system, filler, a softener and process additives.EFFECT: material has improved physical-mechanical and operational properties, and improved electrical insulation properties.15 cl, 2 tbl, 6 ex

Elastomer composition // 2570024
FIELD: chemistry.SUBSTANCE: elastomer composition contains, wt.p.: butadiene-nitrile caoutchouc - 100.0, vulcanising system - 10.6, antioxidant - naphtham-2 - 1.0-3.0, filling agent in form of mixture of technical carbons - 55-125, plasticiser - dibutylsebacate - 20.0. Composition additionally contains modifying additive in form of mixture of polyethyleneglycol ethers - 0.5-3.0, subvulcanisation retardant - n-cyclohexylthiophthalinide - 0.5-0.75, technological additive - mixture of diphenylamine and imidazole derivatives - 2.0-6.0 Composition contains dithiodimorpholine, thiuram D, zinc oxide, stearic acid, altax and sulphenamide C as vulcanising system.EFFECT: invention makes it possible to increase resistance to early vulcanisation with preservation of required physical-mechanical characteristics.3 tbl

Butadiene-nitrile rubber based composition // 2569534
FIELD: chemistry.SUBSTANCE: composition includes, pts.wt: butadiene-nitrile rubber - 100, sulphur - 1.5-2.0, zinc oxide - 3.0-5.0, technical carbon - 40.0-50.0, stearic acid - 1.0-1.5, vulcanisation accelerator - 0.7-1.5 and a siloxane of formula 1 with 2-(trifluoromethyltrifluorocyclobutyl)ethyl radical at the silicon atom - 1.0-2.0.EFFECT: invention enables to obtain rubber with an improved set of physical and mechanical properties and processability owing to low viscosity of the initial rubber mixture.2 tbl, 1 ex

Thermostable rubber mixture with increased hardness // 2567291
FIELD: chemistry.SUBSTANCE: thermostable mixture with increased hardness includes the following ingredients, wt. p.: butadiene-nitrile caoutchouc - 10.0-15.0, partially hydrated butadiene-nitrile caoutchouc - 85.0-90.0, vulcanising agent - perkadox BC-FF - 7.0-7.5, coagent of peroxide vulcanisation deltagran HVA-270 GE - 1.5-2.0, zinc monomethacrylate - 4.0-5.0, phenolformaldehyde resin PR-012A - 1.5-2.0, technical urotropine - 1.5-2.0, irganox 1010 - 2.0-3.0, acetonanyl H - 0.5-1.5, technical carbon N 220 - 50.0-55.0, technical carbon P 803 - 20.0-25.0, rosil-175 - 4.0-6.0, oilpolymer resin "Shinplast" - 1.5-2.0, polymethylsiloxane PMS-200 - 0.5-1.5, oligoetheracrylate MGF-9 - 4.0-6.0, oligoetheracrylate TGM-3 - 4.0-6.0, zincolet BB-222 - 1.5-2.5.EFFECT: invention makes it possible to increase elasticity-strength properties and heat-aggressiveness resistance of vulcanisate at 150°C, provide sealing ability of rubber elements increase their efficiency, increase resistance to tear.2 tbl

Ruthenium-based catalysts for metathesis of nitrile rubbers // 2566501
FIELD: chemistry.SUBSTANCE: present invention relates to a method for metathesis of nitrile rubbers in the presence of a special catalyst for metathesis breakdown of nitrile rubber. The method for metathesis of nitrile rubbers is carried out in the presence of at least one catalyst of general formula,where M denotes ruthenium, Y denotes oxygen (O), X1 and X2 denote anionic ligands, R1 denotes a hydrogen atom, C1-C12-alkyl, C2-C12-alkenyl, C2-C12-alkynyl or aryl, R2, R3, R4, R5 are identical or different and each denotes a hydrogen atom, -NO2, C1-C12-alkyl, C1-C12-alkoxy, unsubstituted or substituted with a radical selected from a group consisting of C1-C6-alkyl and C1-C6-alkoxy, phenyl, R6 denotes C1-C12-alkyl, C3-C6-cycloalkyl, C7-C18-arylalkyl or aryl, R7 denotes a hydrogen atom, C1-C12-alkyl, C5-C6-cycloalkyl, aryl or C7-C18-arylalkyl, and L denotes a neutral ligand.EFFECT: disclosed method enables to perform metathesis breakdown of nitrile rubber without gel formation, and also enables to achieve low molecular weight of broken down nitrile rubber with a comparable noble metal load.12 cl, 3 ex
Rubber mixture // 2559883
FIELD: chemistry.SUBSTANCE: invention relates to rubber mixture and can be used as elastic rubber elements, applied in production of packer and anchor equipment in oil and gas industry. Rubber mixture contains butadiene-nitrile rubber and partly hydrated butadiene-nitrile rubber, technical carbon N 220 and technical carbon P 514, magnesia usta, antioxidant - agidol-2, age resistor - acetone anil H, vulcanisation activator - zinc stearate, plasticiser - dibutylphthalate, lubricant for resin polymethylsiloxane liquid - 200, modifier - Thiokol NVB-2, vulcanising agent - novoperox PB-40, vulcanisation coagent - triallyl cyanurate 70 GR in amounts, given in invention formula.EFFECT: increase of physical and mechanical indices, namely tensile strength, relative elongation, thermal stability at temperature 150°C.2 tbl
Aqueous suspensions of carboxyl group-containing, completely or partially hydrogenated nitrile rubbers, methods for production thereof and use thereof // 2559464
FIELD: chemistry.SUBSTANCE: invention relates to nitrile rubbers and to an aqueous suspension of carboxyl group-containing, completely or partially hydrogenated nitrile rubber. The aqueous suspension of carboxyl group-containing, completely or partially hydrogenated nitrile rubber includes at most 1 pts.wt emulsifier per 100 pts.wt nitrile rubber. The carboxyl group-containing, completely or partially hydrogenated nitrile rubber has in the suspension average particle diameter in the range of 0.01 mcm to 0.9 mcm, measured by dynamic light scattering, or particle diameter d50, determined by laser diffraction at weight-average intensity in the range of 0.01 mcm to 0.9 mcm.EFFECT: invention improves stability of the aqueous suspension of nitrile rubber.17 cl, 7 tbl, 37 ex

ethod for synthesis of acrylonitrile and acrylic acid copolymers // 2550873
FIELD: chemistry.SUBSTANCE: invention relates to production of acrylonitrile copolymers which are widely used in production of carbon fibre. The method for synthesis of copolymers containing acrylonitrile and acrylic acid monomer links includes mixing monomers in a solvent medium while adding a radical polymerisation initiator - carbon dioxide - and heating to temperature of 50-100°C, wherein content of acrylic acid and methyl acrylate with respect to acrylonitrile is 0.5-4.0 mol % and 0.5-5.0 mol %, respectively.EFFECT: invention enables to obtain copolymers of acrylonitrile with acrylic acid and methyl methacrylate of a given composition using an environmentally safe, cheap and energy efficient method.1 tbl, 18 ex
Rubber mixture // 2550827
FIELD: chemistry.SUBSTANCE: invention relates to rubber-technical industry, in particular to production of rubber mixtures for production of products of different target purpose, exploited under low temperature conditions. Rubber mixture contains, wt. p.: butadiene-nitrile caoutchouc - 100, dicumyl peroxide - 5-6, sulphur - 0.4-0.6, zinc oxide - 5.0-5.5, tetramethylthiuram disulphide - 0.3-0.4, technical carbon - 120-130, stearine - 1.0-1.5, dibutylsebacate - 18-20, diaphene IPPD - 3.0-3.5, naphthame-2 - 2.0-2.5, technological additive softener PC-1 - 1.0-1.5.EFFECT: invention makes it possible to improve technical characteristics.2 tbl

Oil-resistant rubber composition // 2547477
FIELD: chemistry.SUBSTANCE: invention relates to preparation of a rubber composition based on hydrogenated butadiene-nitrile rubber with high content of acrylonitrile and low unsaturation and can be used in the rubber and industrial rubber industry to produce multilayer rubber-cord articles, used in conditions with dynamic loads, fuels and oils at high temperatures for a long period of time. The technical result is achieved by using, in the formulation of the rubber composition, a polymer base in the form of hydrogenated butadiene-nitrile rubber with high content of acrylonitrile (49-50%) and low unsaturation (5-7%), a vulcanising agent - sulphur donor in the form of N,N'-dithiodimorpholine, coupled with a dual system of high-activity vulcanisation accelerators, with the following ratio of components, pts.wt: hydrogenated butadiene-nitrile rubber with high content of acrylonitrile of 49-50% and low unsaturation (5-7%) - 100.0; ground sulphur - 0.1-0.3; technical carbon - 40.0-50.0; zinc oxide - 5.0-8.0; white soot - 5.0-20.0; plasticiser - 10.0-18.0; stearic acid - 0.5-1.5; diaphene FP-n/b 2.0; acetonanyl N - n/b 1.0; N,N'-dithiodimorpholine - 0.5-2.0; thiuram D - 0.6-1.5; sulphenamide C - 0.8-2.0. The invention increases oil and heat resistance and dynamic endurance of multilayer rubber-cord articles.EFFECT: obtaining a rubber composition with high oil and heat resistance, high dynamic endurance, which enables rubber-cord articles to retain operational properties in aggressive media at high temperatures for a long period of time.2 tbl
Composite polymer material for vibration-absorbing coatings and method of their mounting // 2534242
FIELD: chemistry.SUBSTANCE: invention relates to filled composite polymer materials, intended for floor vibration-absorbing coatings and can be used in ship-building, civil and industrial construction and other fields. The composite polymer material represents a rubber mixture of a various colour range based on a combination of butadiene-nitrile rubber and cis-isoprene rubber, processed by the moulding method. The rubber mixture includes sulpheneamide, thiuram, N,N'-dithiodimorpholine, zinc oxide, stearic acid, styrene-indene resin, 2,5-ditertbutylhydroquinone, a fire-retardant - antimony trioxide, and chloroparaffin CP-1100, a water-absorber - calciumnaphth. The method of mounting includes the application of the polyurethane-based water-resistant glue composition with the provision of exfoliation strength up to 8-10 kN/m. The invention makes it possible to improve dynamic parameters, elasticity, reduce wear, increases the sealing ability and exploitation properties of the material.EFFECT: material provides coatings with toxicological safety, is fire-resistant, has high strength of fixation to the mounting surface.2 cl, 3 tbl
Frost-resistant rubber mixture // 2522610
FIELD: chemistry.SUBSTANCE: invention relates to a frost-resistant rubber mixture and can be applied in the automobile and rubber industry for production of sealing components, exploited under low-temperature conditions. The rubber mixture contains butadiene-nitrile rubber BNKS-18 AN, butadiene nitrile rubber SKN-18PVH 30, thiuram D, naphtha-2, sulphenamide C, factice, technical carbon P 803, technical carbon T 900, technical carbon P245, zinc oxide, sulphur, stearin, wax ZVP, oxanol KD-6, carboxyl KS-20, N,N-dithiodimorpholin, N-nitrosodiphenylamide and plasticisers - dibutyl sebacate or trichloroethylphosphate, or trichloropropylphosphate.EFFECT: invention makes it possible to improve physical-mechanical characteristics, in particular the temperature limit of fragility, relative elongation in rupture.2 tbl
Polymer composition // 2519402
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry, in particular to production of rubber products, intended for application as mechanical rubber products. Polymer composition can be used for manufacturing rubber products for different household purposes, working in contact with aggressive media, at higher temperatures, and for creation of construction products together with rubbers on the base of general purpose rubbers. Polymer composition contains butadiene-nitryl rubber CKH-40, sulphur, altax, diphenylguanodine, zinc white, stearic acid, dibutylphthalate, modifier - mixture of fullerenes of fraction C50 - C92 and anti-ageing agents - acetonanyl R and diaphene FP and filling agent - mixture of technical carbon P-234 and chalk GPC.EFFECT: elaboration of formula of polymer composition with improved technological properties, increased strength and resistance to impact of aggressive media.2 tbl, 3 ex

Vulcanisable rubber mixture // 2507224
FIELD: chemistry.SUBSTANCE: invention relates to production of a vulcanisable rubber mixture based on hydrogenated butadiene-nitrile rubber used to make industrial rubber articles for the oil extraction industry, oil refining industry and mechanical engineering. The rubber mixture contains the following components, pts.wt: hydrogenated butadiene-nitrile rubber - 100, quinol ether EX-1 - 3-7, technical carbon - 40-50, plasticiser - 6-10, stearic acid - 1-2, antioxidant - 1-3, fatty acid salt - sodium stearate, sodium oleate or zinc stearate - 1-3.EFFECT: invention increases the rate of vulcanising the rubber mixture, enables to obtain rubber with an improved system of mechanical properties, high heat-resistance and resistance to liquid aggressive media.6 tbl, 68 ex
Composite polymer material for deck and floor coatings // 2507223
FIELD: chemistry.SUBSTANCE: invention relates to high-strength composite polymer materials for deck and floor coatings. The composite polymer material, which is a rubber mixture processed by a moulding technique, contains a polymer matrix, a vulcanising system consisting of thiuram, altax, zinc oxide and stearic acid, filler and process additives. The polymer matrix used is a petrol-, oil- and ozone-resistant polymer which is modified with polyvinyl chloride and contains 26-34 wt % acrylonitrile, and additionally sulphur, sulphenamide and polymerised 2,2,4-trimethyl 1,2- dihydroquinoline. The filler consists of BS-100 silicon dioxide, pigment titanium dioxide, natural hydrophobic chalk in weight ratio of 35-115:4-20:5-50 pts.wt, respectively. The process additives include TGM-3 oligoester acrylate plasticiser and antipyrenes which contain antimony trioxide and zinc borate in ratio of 3-20:5-25, and N-cyclohexyl thiophthalimide.EFFECT: invention enables to obtain high-strength petrol-, oil- and ozone-resistant floor coating with antistatic, fire-resistance and vibration-absorption properties.2 cl, 2 tbl, 5 ex
Oil-and-petrol resistant rubber mixture // 2507221
FIELD: chemistry.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.2 tbl

Vulcanising polymer composition, method for production thereof, polymer vulcanisate and method for production thereof // 2506286
FIELD: chemistry.SUBSTANCE: invention relates to a vulcanising polymer composition, a polymer vulcanisate obtained from the polymer composition and a method for production thereof. The vulcanising polymer composition contains (i) a hydrogenated polymer having a polymer backbone chain formed from (ia) 25-89.5 wt %, preferably 30-80 wt % and more preferably 45-75 wt % with respect to the polymer of a first monomer, which includes at least one secondary carbon atom and a tertiary carbon atom into the polymer backbone chain, such as at least one diene monomer, and (ib) 10-74.9 wt %, preferably 10-60 wt %, more preferably 15-55 wt %, even more preferably 20-50 wt % with respect to the polymer of a second monomer, such as an α,β-ethylenically unsaturated nitrile monomer; (ic) 0.1-20 wt %, preferably 0.5-20 wt %, more preferably 1-15 wt %, even more preferably 1.5-10 wt % with respect to the polymer of at least one monomer of a monoester of α,β-ethylenically unsaturated dicarboxylic acid, a monomer of α,β-ethylenically unsaturated dicarboxylic acid, a monomer of an anhydride of α,β-ethylenically unsaturated dicarboxylic acid or a diester of α,β-ethylenically unsaturated dicarboxylic acid as a third monomer, where the total content of all monomer links given in (ia), (ib) and (ic), is equal to 100 wt %; (ii) at least one cross-linking agent - polyamine, and (iii) at least one bi- or polycyclic amine-base which is selected from a group comprising 1,5-diazabicyclo[4,3,0]-5-nonene (DBN), 1,4-diazabicyclo[2.2.2]octane (DABCO) 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBC), 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD) and derivatives thereof. The invention also relates to a polymer vulcanisate and a method for production thereof.EFFECT: obtained vulcanisates demonstrate high cross-link density and have improved properties.16 cl, 17 tbl, 15 ex
Polymer composition for making tubes // 2505563
FIELD: chemistry.SUBSTANCE: composition contains low pressure, medium density polyethylene PE80B and chopped carbon fibres in amount of 10 wt %. The chopped carbon fibres used are based on polyacrylonitrile and have length of 5-6 mm and diameter of 5.4-6.0 mcm. Carbon nanofibres are catalytically grown on the surface of said chopped fibres in amount of 22-32 wt %.EFFECT: improved physical and mechanical properties of the tube material, specifically high yield point and tensile modulus, breaking elongation and elongation at yield.1 tbl
Vulcanisable rubber mixture // 2503692
FIELD: chemistry.SUBSTANCE: rubber mixture contains the following components, pts.wt: hydrogenated butadiene-nitrile rubber - 100, quinol ether EX-1 - 3-7, technical carbon - 40-50, plasticiser - 6-10, stearic acid - 1-2, antioxidant - 1-3, amine compound - 0.5-1.5.EFFECT: invention increases the rate of vulcanisation of rubber mixtures and enables to obtain rubber with an improved set or properties, including high heat resistance and resistance to liquid aggressive media.6 tbl, 68 ex

Solid polymer electrolyte for lithium sources of current // 2503098
FIELD: electricity.SUBSTANCE: proposed solid polymer electrolyte comprises a polymer matrix filled with a solution of lithium salt in an ion liquid (15.0-43.8 wt parts). The polymer matrix is a semi-mutually penetrating net comprising a linear elastomer - butadiene-acrylonitrile rubber (BANR) (8.8-14.5 wt parts) and a cross-linked ion copolymer (35.0-58.1 wt parts), produced from monomers selected from groups of (meth)acrylates of polyethylene glycol (MPEG), di(meth)acrylates of polyethylene glycol (DMPEG) and (meth)acrylate ion liquids (MIL), at the ratio of MPEG:DMPEG:MIL 1:2:6 (wt). The most efficiently the solid polymer electrolyte may be used as a separator in thin-film lithium-ion sources of current.EFFECT: improved properties.2 cl, 1 tbl, 6 dwg, 3 ex
Butadiene-nitrile rubber based rubber mixture // 2501820
FIELD: chemistry.SUBSTANCE: invention relates to rubber industry, particularly production of rubber mixtures used to make articles for various purposes, including packer elements (rubber sealers in oil or gas wells), used in production of packer and anchor equipment. The rubber mixture contains the following ingredients, pts.wt (per 100.00 pts.wt rubber): paraffinate butadiene-nitrile rubber BNKS-40 AMN 100.00, with weight content of acrylonitrile of up to 41%, dicumyl peroxide (Perkadox BC-FF) - 3.0-4.0, vulcanisation coagent Deltagran HVA 2 70 GT - 1.0-3.0, zinc oxide - 3.0-5.0, antioxidant Irganox 1010 - 2.0-3.0, oligoester acrylates TGM-3 - 6.0-10.0, active technical carbon H-220 - 50.0-70.0, technical carbon T-900 - 10.0-30.0, dispersant zincolet BB 222 1.0-3.0, anti-scorch Santogard PVI - 0.3-0.5.EFFECT: invention improves physical and mechanical properties of the rubber mixture, processability thereof by high-pressure casting, with improved elastic-strength properties, high aggressive heat resistance and low relative compression set, operating capacity under high loads.1 tbl
Rubber mixture // 2499806
FIELD: chemistry.SUBSTANCE: rubber mixture contains butadiene-nitrile rubber, a vulcanising agent, zinc oxide, technical carbon, an antioxidant - N-phenyl-N'-isopropyl paraphenylenediamine - diaphene FP, stearic acid, and is characterised by that it further contains carboxylated butadiene-nitrile rubber, a plasticiser - α,ω-dimethylacrylate phthalate (bitriethylene glycol) and tri(oxyethylene) - α,ω-dimethacrylate, a vulcanisation accelerator - 2-mercaptobenzthiazole - captax, an antioxidant - 1,2-dihydro-2,2,4-trimethylquinoline - acetonanyl H, the vulcanising agent used being dicumyl peroxide - Perkadox BC-FF.EFFECT: high weather resistance and oil-and-petrol resistance at high temperatures.2 tbl, 5 ex
Heat-resistant rubber mixture // 2495889
FIELD: chemistry.SUBSTANCE: invention relates to heat-resistant rubber mixtures and can be used in car, oil and industrial rubber industry. The heat-resistant rubber mixture contains butadiene-nitrile rubber, sulphur, thiazole 2 MBS, diphenyl guanidine, N-nitrosodiphenylamine, zinc oxide, stearin, dibutyl sebacate, technical carbon and diaphene SP. The mixture further contains an anti-ageing agent - powder form of Novantox 8 PFDA (Novantox 8 PFDA+schungite).EFFECT: improved resistance of rubber to thermal ageing on air, low cost of the mixture owing to reduced amount of the anti-ageing agent while maintaining sufficiently good physical and mechanical properties.2 tbl
Heat-resistant rubber mixture // 2495061
FIELD: chemistry.SUBSTANCE: invention relates to production of rubber mixtures used to make elastic rubber elements used in manufacturing packer and anchor equipment for the oil industry. The heat-resistant rubber mixture based on a combination of butadiene-nitrile rubber and partially hydrogenated butadiene-nitrile rubber, contains a curing agent, a peroxide curing co-agent, zinc oxide, a process additive for rubber mixtures and technical carbon. The mixture contains as a curing agent - novoperox BP-40, as a peroxide curing co-agent - deltagran HVA-2 70 OH, as a process additive for rubber mixtures - softener RS-1 and additionally 2-mercaptobenzothiazole, burnt magnesia, stearic acid, naugard 445, novatox 8PFDA, zincolet VV-222, technical carbon N 220, technical carbon P 514, oligoether acrylates MGF-9 and TGM-3, with the following ratio of components, pts.wt: butadiene-nitrile rubber - 15.0-25.0; partially hydrogenated butadiene-nitrile rubber - 75.0-85.0; novoperox BP-40 - 10.0-11.0; deltagran HVA-2 70 GE - 1.5-2.0; 2- mercaptobenzothiazole - 0.3-0.5; zinc oxide - 3.0-5.0; burnt magnesia - 8.0-10.0; stearic acid - 0.5-1.0; zincolet VV-222 - 1.0-2.0; softener RS-1 -1.0-2.0; naugard 445 -1.0-3.0; novatox 8PFDA - 1.0-3.0; technical carbon N 220 - 15.0-20.0 technical carbon P 514 - 50.0-55.0; oligoether acrylates MGF-9 - 8.0-12.0; oligoether acrylates TGM-3 - 8.0-12.0.EFFECT: improved elastic-strength properties of the vulcanisate at temperature of 150°C, providing sealing capacity of rubber elements of packer and anchor equipment, high tear resistance, high operating capacity of the rubber element at high temperatures.1 cl, 1 tbl
Composite material based on hydrogenated butadiene-nitrile rubber and acrylic rubber // 2492193
FIELD: chemistry.SUBSTANCE: invention relates to production of composition material based on hydrogenated butadiene-nitrile rubber and acrylic rubber and can be used in making heat-resistant rubber plates, rubber-coated shafts and rubber sealing components. The composite material based on hydrogenated butadiene-nitrile rubber and acrylic rubber contains a metal stearate, sulphenamide TS, thiuram, D, a quaternary ammonium base, stearic acid, zinc oxide, a mixture of diaphene FP and acetonanyl R, technical carbon, N,N'-dithiodimorpholine, 2,2-dibenzthiazole disulphide, 1,2-polybutadiene, N-cyclohexyl thiophthalimide and a process additive.EFFECT: invention improves rheologic properties, widens the range of physical-mechanical and low-temperature properties of the composite material while retaining deformation properties, as well as the possibility of processing by a moulding and non-moulding technique.3 cl, 2 tbl

Vulcanisable butadiene-nitrile rubber based adhesive composition // 2492192
FIELD: chemistry.SUBSTANCE: invention relates to production of a vulcanisable butadiene-nitrile rubber based adhesive composition which is processed by pressure casting to make rubber sealing components for hydraulic and pneumatic devices. The vulcanisable rubber mixture contains the following, pts.wt: butadiene-nitrile rubber - 90-99, acrylic rubber - 1-10, sulphur - 0.1-1.0, zinc oxide - 3-10, technical carbon - 60-120, stearic acid - 0.5-2.0, tetramethylthiuram disulphide - 1-4, N-cyclohexyl-2-benzthiazolyl suphenamide - 1-2, quaternary ammonium salt - 0.1-2.0, metal stearate - 0.1-2.0, N-phenyl-N'-isopropyl-n-phenylenediamine - 1.0-1.5, 2,2,4-trimethyl-1,2-dihydroquinoline - 1-2, plasticiser - 5-20, and a process additive - 0.5-4.0.EFFECT: disclosed rubber mixture increases resistance to accumulation of residual compressive deformations during thermal ageing while preserving elastic properties of the mixture, reduces viscosity in order to make sealing components by pressure casting.2 tbl

Nitrile rubbers // 2491296
FIELD: chemistry.SUBSTANCE: invention relates to nitrile rubber, method of its obtaining and products, obtained from it. Claimed nitrile rubber contains structure repeat units of, at least, one α,β- unsaturated nitrile and, at least, one conjugated diene, and has ion indicator in range 0-60 ppm×mole/g. Nitrile rubber is obtained by emulsion polymerisation. Obtained latex, which contains nitrile rubber, is subjected to coagulation, and then coagulated nitrile rubber is washed. Polymerisation is carried out in presence of, at least, one alkylthiolate. Before coagulation value of latex pH is set at level, at least, 6, and then is coagulated in presence of, at least, one magnesium salt. Temperature of latex before adding at least one salt of magnesium is set at value 45°C. Obtained nitrile rubber is applied for obtaining capable of vulcanisation mixtures, which contain claimed rubber, at least, one linking agent and, if necessary, additional target additives to rubbers. Capable of vulcanisation mixtures are vulcanised by casting with obtaining cast products.EFFECT: claimed nitrile rubbers have exclusive speed of vulcanisation, as well as exclusive properties of vulcanisates.24 cl, 13 tbl, 17 ex

Hydrolysis-resistant polyamide-elastomer mixtures, articles moulded therefrom and use thereof // 2485149
FIELD: chemistry.SUBSTANCE: invention relates to polyamide-elastomer mixtures for making moulded articles. The polyamide-elastomer mixture contains components in the following ratios, wt %: a) 30 to 95 of at least one partially crystalline polyamide having a solution viscosity greater than or equal to 1.75 (measured in m-cresol solution, 0.5 wt %, 20°C.), b) 5 to 50 of at least one elastomer produced by emulsion polymerisation of at least one conjugated diene, at least one α,β-unsaturated nitrile and, optionally, one or more additional copolymerisable monomers and subsequent spray drying of the latex obtained during emulsion polymerisation, c) optionally, 0 to 20 of one or more polyamides having a solution viscosity of less than 1.75 (measured in m-cresol solution, 0.5 wt %, 20°C.), relative to the total amount of components (a) to (c), and relative to 100 parts by weight of components (a) to (c), from 0 to 100 parts by weight of one or more additives. The disclosed polyamide-elastomer mixtures can be processed into moulded articles which are used, for example, in the motor car industry, particularly as channel conducting media.EFFECT: good flexibility of polyamide-based materials and improved resistance to hydrolysis and oil swell.33 cl, 4 dwg, 2 tbl, 1 ex
Rubber mixture // 2485147
FIELD: chemistry.SUBSTANCE: invention relates to a frost-resistant rubber mixture and can be used in motor car and industrial rubber industry to make sealing components used in mobile assemblies of mechanisms operating in low temperature conditions. The rubber mixture contains butadiene-nitrile rubber BNKS-18 AMN, butadiene-nitrile rubber SKN-18 PVC30, thiuram D, naphtham-2, factice, oxanol TS-100, technical carbon P 803, technical carbon T 900, technical carbon 324, zinc oxide, sulphur, stearine, wax ZVP, carboxyl, zincolet VV 222, trichloroethylphosphate.EFFECT: invention improves technical characteristics of rubber - brittleness temperature range and ultimate elongation.2 tbl

Nitrile rubber // 2479591
FIELD: chemistry.SUBSTANCE: nitrile rubber contains repeating units of at least one α,β-unsaturated nitrile and at least one conjugated diene and has ionic index in the range of 7-26 ppm×mol/g. The nitrile rubber is obtained by emulsion polymerisation. The obtained latex, which contains nitrile rubber, is coagulated and the coagulated nitrile rubber is washed. Polymerisation is carried out in the presence of at least one alkylthiol. Before coagulation, the pH of the latex is set to at least 6, and coagulation is then carried out in the presence of at least one salt of a monovalent metal. The latex coagulation temperature ranges from 60 to 90°C and the washing temperature ranges from 50 to 90°C. The obtained nitrile rubber is used to obtain curable mixtures which contain said rubber and at least one cross-linking agent. The curable mixtures are cured by moulding to obtain moulded articles.EFFECT: nitrile rubber has excellent curing rate and exceptional properties of cured products.26 cl, 7 tbl, 13 ex
 
2550891.
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