Rubber mixture

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


The invention relates to cold-resistant rubber compound and can be used in the automotive and rubber industry, for the manufacture of seals used in the moving parts of mechanisms, operating in conditions of low temperatures.

Known rubber compound containing natural rubber, zinc white, crumb, made from the bark of the cork oak, carbon technical grade P-514, carbon technical grade P-701, sulfur technical, acetonyl R, sulfenamide C, diafana OP, stearin. EN 2386650 IPC C08L 7/00, C08L 79/04, C08K 3/04, C08K 3/06, C08K 3/22, C08K 5/09, C08K 5/18, C08K 5/441, publ. 20.04.2010.

However, the use of oak bark considerably increases the cost of the rubber mixture and the rubber on its base has insufficient resistance to specific environments.

Known rubber compound, which comprises a nitrile butadiene rubber, sulfur, vulcanization accelerator, zinc oxide, carbon black, a plasticizer, an antioxidant and an inorganic filler - slag ferrography camerascamera. Options rubber mixture may include a mixture of butadiene and butadiene-styrene rubber, isoprene rubber, butadiene-styrene and a mixture of isoprene and butadiene rubbers, various plasticizers, additives and reclaim rubber tires. EN 2149165 MPK7 C08L 9/00, C08L 9/02, C08L 9/06, C08K 13/02, C08K 13/02, C08K3:04, C08K 3:06, C08K 3:10, C08K 3:22, C08K 3:36, C08K 5:01, C08K 5:40, C08K 5:44, publ. 20.05.2000.

The disadvantage of this rubber compound is a low temperature limit of fragility.

Known rubber mixture containing profinity butadiene-nitrile rubber in combination with a highly saturated gidrirovanny (degree of hydrogenation of from 93 to 99%) nitrile butadiene rubber containing nitrile of acrylic acid 18% - 0,30 MASC Advanced rubber compound contains sulfur, magnesium oxide, zinc oxide, carbon black P-803, carbon black P-514, dibutylsebacate, Proximo F, deafen OP, acetonyl. EN 2284337 IPC C08L 9/02, C08K 3/22, C08K 3/06, C08K 3/04, publ. 27.09.2006.

The disadvantages of this rubber are low relative elongation and brittle.

Known rubber compound comprising rubber, butadiene-nitrile brand BNX-AM, BNX-ANN, rubber, butadiene-nitrile hydrogenated brand BNCW 4030, grade Turban, sulfur, sulfenamid, altax, stearic acid, rosin, deburocratisation, white carbon, zinc, deafen OP, carbon black P-803, carbon black P-245, modifier RU-D, aramid, or nylon fiber. EN 2309962 IPC C08L 9/02, C08K 13/02, C08K 3/04, C08K 3/06, C08K 3/22, C08K 3/36, C08K 5/0, C08K 5/17, C08K 5/18 C08K 7/02 publ. 10.11.2007.

The disadvantages of this rubber are low relative lengthened the I-brittle transition temperature.

Known zeolite-resistant rubber mixture based on butadiene-nitrile rubber and mineral filler - zeolite, which includes sulfur, zinc oxide, N,N-diphenylguanidine, carbon P. In the rubber mixture is additionally injected polymer composition of ultra-high molecular weight polyethylene with natural zeolite in their mass ratio 10-30:0.5 to 2.0 in the amount of 10.5-of 32.0 parts by weight per 100 parts by weight of rubber. Natural zeolite is subjected to a preliminary mechanical activation. EN 2326903 IPC C08L 9/02, C08L 23/06, C08K 3/36, C08K 3/04, C08K 3/06, C08K 3/22, C08K 5/09, C08K 5/10, C08K 5/18, C08K 5/31 20.06.2008.

However, the mineral filler is injected into the mixture in the form of pre-prepared polymer compositions, which complicates the manufacture of rubber compounds. Also the disadvantage of this rubber compound is low relative elongation.

Closest to the technical essence is a rubber mixture based on butadiene-nitrile rubber containing sulphur, N,N'-diphenylguanidine, di-(2-benzothiazolyl)disulfide, zinc oxide, aldol-α-naphtylamine, N-(4-hydroxyphenyl)naphtylamine-2, N-(1,3-dimethylbutyl)-N'-phenylenediamine-1,4, carbon P with a specific surface area 12-18 m2/g, stearic acid, dibutyl phthalate, molybdenum disulfide, β-Sialon General formula Si6-xAlxOxN8-x. EN 2125068 MPC C08L 9/02, C08K 13/02 C0K 13/02, C08K 3:06, C08K 3:04, C08K 3:22, C08K 3:30, C08K 3:28

However, the known rubber compound has insufficient indicators for temperature limit of fragility and relative elongation at break.

The objective of the invention is to provide a frost-resistant rubber compound with improved technical characteristics, expanding the range of tools for this purpose.

The technical result is an improvement of the technical characteristics, namely temperature limit of fragility and relative elongation at break.

The technical result is achieved by the fact that the rubber mixture containing butadiene-nitrile rubber, sulfur, carbon black, saaristomeri component, zinc oxide and mineral filler according to the invention additionally contains technological additives: thiuram D, naphthas, 2-factis, oxanol CA-100, wax VIZ, Cinquale CENTURIES 222 and plasticizer trichlorethylene, and as nitrile butadiene rubber contains NBR BNKS-18 AMS and NBR SKN-18 PVC 30, as carbon - carbon P-803, technical carbon - T-900, carbon black - T-324; as steeringsteering component - stearin and as a mineral filler - carbosil, with the following ratio of components in mass

The NBR BNKS-18 AMS75,00
The NBR SKN-18 PVC 3025,00
Thiuram D3,00-4,00
Oxanol CA-1004,00-5,00
Carbon P 80370,00-80,00
Carbon T 90030,00-40,00
Carbon 32410,00-20,00
Zinc oxide3,00-4,00
Wax VIZ3,00-4,00
Cinquale CENTURIES 2221.5 to 2.5

The distinction of the proposed solution is a new combination of known components used in various rubber compounds, and their new proportion, which allows to obtain a technical result, expressed in the increase of the temperature limit of fragility and relative elongation at rupture, thereby expanding the range of mixtures for this purpose. The use of different grades of rubber and carbon black cheapen the rubber mixture and make it more sophisticated.

The rubber mixture is produced by mixing the rubber and other components in the mill LB 320/150/150 the modes adopted for the mixture 1352 on THE 38005204-84 based on butadiene-nitrile rubber.

Examples of specific performance (the rubber compositions of the mixtures are given in table 1. Specifications are given in table 2

To obtain a rubber compound used the following materials:

The NBR brand BNKS-18 AMS - TU 38.30313-98; butadiene-nitrile rubber stamps SKN-18 PVC 30 - TU 38.40397-93; thiuram D (tetramethylthiuramdisulphide) - GOST 740-76; naphthas-2 (phenyl-2-naphtylamine) - GOST 39-79; carbon technical - GOST 7885-86; zinc white (zinc oxide) - GOST 202-92; technical sulfur - GOST 127.1-93; stearin - GOST 6484-84; wax VIZ - TU 381011290-90; Oksana CA-100 - TU 6-36-1029-90; factis - TR 81-13-2002; carbosil - TU 57-16-201-10968286-2006; TCHEPH (trichlorethyl the SFAT) - THE 6-06-241-92; Cinquale CENTURIES 222 - firm "Dunlop".

Synthetic nitrile butadiene rubber filled with polyvinyl chloride (PVC) brand SKN-18 PVC-30 (TU 38.103213-2006), obtained by joint coagulation nitrile butadiene latex with a latex of polyvinyl chloride. Briquettes from light yellow to dark brown.

Wax VIZ (TU 381011290-90) - stabilizer of physical activity for rubber General and special purpose. Is a mixture of refined petroleum products - higher hydrocarbons with the addition of paraffin. T melting point of 65°C.

Oxanol CA-100 (TU-6-3 6-1029-90) - surfactant, produced by oksietilirovannye primary alcohols fraction C16-C20received alumoorganic synthesis. CnH2n+2O(CH2CH2O)mH, where n=19÷20, m=100. Appearance: solid white scales. An aqueous solution with a mass fraction of drug 10% is a clear, almost colorless liquid.

Carbosil KS-20. THE 5716-201-10968286-2006, plays songs in a semi-active role filler. Fine black powder. The density of 2.25 to 2.35 g/cm3. The use of filler carbosil increases the ductility of the blends, which allows to reduce the share of plasticizers.

Cinquale CENTURIES 222 is a mixture of high molecular weight aliphatic esters of fatty acids. Application: used in polymer chemistry as those is technological additive, in the processing of polymers. Represents the flakes of white or pale cream color.

Has the following properties, softening temperature of 55+/-5°C; ash - (2 hours at 850°C) - 0,2 Max.%; specific gravity : 0.97 kg/m3.

Table 1
ComponentsThe compositions of the rubber composition (in wt. parts)
123the placeholder
The NBR BNX-75,0075,0075,00-
The NBR, SKN-1825,0025,0025,00-
The NBR--100,00
the content of the acrylic nitrile
acid 17-23 wt.
Zinc oxide3,003,504,007,40-7,60
Carbon black mark P 80370,0075,0080,00128-132
Carbon black Mar and T 900 30,0035,0040,00-
Carbon black brand 32410,0015,0020,00-
Wax VIZ3,003,504,00-
Oxanol CA-1004,004,505,00-
Cinquale CENTURIES 2221,52,02,5-
Aldol - naphthalamine---3,80-4,20
Molybdenum disulfide---0,50-1,00
Fluoroplast-4 MB---15,0-30,0

Table 2
The properties of the rubber compoundRubber mixture according to THE 380005204-84StructuresThe placeholder
The tensile strength, MPan/m*6,07,27,57,412-13,8
Elongation at break, %n/m 30035035035040-235
Hardness, units of Shor50-60555760-
Temperature limit fragilityn/in**-55-57-58-57-46--55
* - n/m - not less than
** - n/a - not above

From table 1 it follows that the combination of components in the inventive rubber mixture leads to improvement relative elongation at break and thermal limit fragility, which expands the range of mixtures of this assignment.

The rubber mixture containing butadiene-nitrile rubber, sulfur, carbon black, saaristomeri component, zinc oxide and mineral filler, characterized in that it further comprises technological additives: thiuram D, naphthas, 2-factis, oxanol CA-100, wax VIZ, Cinquale CENTURIES 222, and plasticizer - trichlorethylene, and as nitrile butadiene rubber contains NBR BNX-ANN and NBR SKN-18 PVC 30, as carbon - carbon P-803, carbon black - T-900, -the first carbon - T-324, as steeringsteering component - stearin and as a mineral filler - carbosil in the following ratio of components, parts by weight:

the NBR BNKS-18 AMS75,0
the NBR SKN-18 PVC 3025,0
thiuram D3,0-4,0
oxanol CA-1004,0-5,0
carbon black P-80370,0-80,0
carbon T-90030,0-40,0
carbon T-32410,0-20,0
zinc oxide3,0-4,0
wax VIZ3,0-4,0
Cinquale CENTURIES 2221.5 to 2.5


Same patents:

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.

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26 cl, 7 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: invention relates to aircraft engineering, mechanical engineering and specifically to light, impact resistant, non-flammable foam materials which can be used as structural and heat-insulation aggregates, as well as in making components of "unsinkable" structures with a low water- and fuel-absorption coefficient, for example, float level gauges of fuel tanks of engine units. Disclosed is a composition for producing foam plastic having the following chemical composition, pts.wt: phenol novolac resin 20-40, phenol resol resin 60-80, nitrile rubber 20-40, urotropin 3-10, foaming agent 15-20, aluminium nitrilotrimethylphosphonate fire retardant 3-10. The technical result is high impact viscosity and low fuel-absorption of the foam plastic.

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2 tbl, 3 ex

Polymer composition // 2477297

FIELD: chemistry.

SUBSTANCE: invention relates to composite polymer materials based on a highly processable butadiene-acrylonitrile elastomer, which can be used to produce vulcanisates with high tensile strength, tear resistance, good dynamic properties and heat-ageing resistance. The polymer composition based on butadiene-acrylonitrile elastomer (SKN-26) and polyvinyl chloride (PVC) is modified with aluminium oxide nanoparticles. The polymer composition based on butadiene-acrylonitrile elastomer (SKN-26) polyvinyl chloride (PVC) contains sulphur, captax, thiuram, stearin and aluminium oxide.

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1 tbl, 17 dwg

Polymer composition // 2477294

FIELD: chemistry.

SUBSTANCE: invention relates to composite polymer materials based on a highly processable butadiene elastomer. The polymer composition based on butadiene rubber and high-pressure polyethylene contains sulphur, santocure, zinc oxide, stearin and aluminium oxide.

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Polymer composition // 2476460

FIELD: chemistry.

SUBSTANCE: invention relates to composite polymer materials based on a butadiene-acrylonitrile elastomer, which are widely used in cable production and footwear industry. The composition contains a butadiene-acrylonitrile elastomer SKN-26, polyvinyl chloride, sulphur, captax, thiuram, stearine and technical carbon. Components are in the following ratio, pts.wt: butadiene-acrylonitrile elastomer SKN-26-80, polyvinyl chloride 20, sulphur 1.8, captax 1, thiuram 0.2, stearine 0.2, technical carbon 0.1-5.37. The polymer composition is modified by technical carbon nanoparticles with average particle size of 20-30 nm, the amount of which is determined using the following formula: c=0.1en, where n=0, 1, 2, 3, 4, e=2.7. The invention can be used in producing vulcanisates with high tensile strength, tear resistance, good dynamic properties and heat-ageing resistance.

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9 dwg, 1 tbl, 6 ex

Rubber mixture // 2476459

FIELD: chemistry.

SUBSTANCE: invention relates to rubber mixtures based on butadiene-acrylonitrile rubber. The rubber mixture contains the following, pts.wt: butadiene-acrylonitrile rubber SKN-26-95 and polyvinyl chloride 5, sulphur 1.9, captax 1.19, thiuram 0.24, stearine 0.95, technical carbon 0.1-5.37. The amount of technical carbon is calculated using the formula c=0.1en, where n= 0,1,2,3,4, e=2.7.

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FIELD: chemistry.

SUBSTANCE: nitrile rubber contains repeating structural units of at least one α,β-unsaturated nitrile, at least one conjugated diene and optionally one or more further copolymerisable monomers and (i) has calcium content of at least 150 ppm with respect to nitrile rubber, and chlorine content of at least 40 ppm with respect to nitrile rubber, and (ii) contains terminal 2,2,4,6,6-pentamethylheptane-4-thio- and 2,4,4,6,6-pentamethylheptane-2-thio- and 2,3,4,6,6-pentamethylheptane-2-thio and 2,3,4,6,6-pentamethylheptane-3-thio- groups. Also disclosed is a method of producing nitrile rubber, use thereof, vulcanisable mixtures and method for production thereof, method of producing moulded articles and a moulded article.

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21 cl, 6 tbl, 36 ex

FIELD: chemistry.

SUBSTANCE: composite layered rubberised fabric protective material based on butadiene-nitrile rubber with barrier layer is made three-layered and consisting of middle reinforcing layer, on both sides of which outer covering layers are located, and middle reinforcing layer is made in form of fabric from highly strong polyester fibre with thread of linear density 9-12 tex, with specific breaking load not lower than 610 mN/tex and number of coils 180-220 twists/m, or highly strong aramid fibre or their mixture, highly strong aramid thread with linear density 6.3-14.3 tex, specific breaking load not lower than 200 cN/tex and number of coils 90-130 twists/m being used in the fabric, and threads are used in form of two-component combined thread, whose first component in form of rod represents aramid and/or polyester complex thread or yarn, and second component of two-component combined thread in form of rod braid with number of coils 600-900 twists/m represents modified fire-proof viscose thread or yarn with linear density 10-30 tex, in aramid thread or yarn also used are polyparaphenylene terephthalamide, polymetaphenylene terephthalamide, copolyparaphenylene terephthalamide or copolyparaphenylene benzimidazole terephthalamide fibres. Outer covering layers are made from rubber composition, containing butadiene-nitrile rubber, accelerator of vulcanisation - zinc oxide and thiuram "D", sulphur, regulator of vulcanization rate - additionally zinc oxide, white soot and technical carbon, stearic acid, fire retardants - antimony trioxide, chloroparaffin and melamine cyanurate, pigment - titanium white, antioxidant - polymerised 1,2-dihydro-2,2,4-trimethyl quinoline. On the surface of material from one or two sides of outer covering layer applied is barrier film material from five successively located with respect to surface of outer covering layers, made with total thickness 18-36 mcm in the following succession: first layer from polyolefin, second layer from oriented polypropylene copolymer, third layer from polyvinyl alcohol, fourth layer from oriented polypropylene copolymer and fifth layer from polyolefin. Ratio of thicknesses of barrier layer layers is selected equal (0.18-0.22):(0.23-0.27):0.1:(0.23-0.27):(0.18-0.22). From both sides of third layer of barrier film material located are adhesive layers, made from copolymer of ethylene with vinyl alcohol and maleic anhydride, or from copolymer of ethylene with vinylacetate and maleic anhydride or from copolymer of ethylene with maleic anhydride.

EFFECT: invention makes it possible to provide reliable protection of human skin against aerosol and drop penetration of liquid chemical and harmful substances, preserving higher incombustibility and low surface density, and preserve high drapeability of material and its high tensile and tear strength.

10 cl, 6 ex

FIELD: chemistry.

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2 tbl, 5 ex

Rubber mixture // 2452744

FIELD: chemistry.

SUBSTANCE: rubber mixture contains the following, pts.wt: epichlorohydrin rubber 50, nitrile rubber 50, vulcanisation accelerator 0.6, cross-linking agents 2, magnesium oxide low-activity filler 5, technical carbon and silicon dioxide filler 63, antiozonant 1, adhesive additive 1.5, softeners 12.6, epoxy resin ED-20 2.2-6.2, rubber crumbs from fluoro-rubber wastes containing calcium hydroxide and bisphenol A 14.4-28.0. The adhesive additive used is a quaternary ammonium salt of 1,8-diazobicyclo[5,4,0]-undecene-7 and novolac resin (R-152). The epoxy resin, combined with the rubber crumbs, is used as an additional adhesive.

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4 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: neutral carbon source used is glucose, which is converted to aniline under the action of Escherichia coli or Streptomyces griseus bacteria. The glucose is obtained from plants. The stabiliser, vulcanisation accelerator or modified natural rubber is prepared from aniline obtained as described above.

EFFECT: invention improves environmental friendliness of methods of preparing a stabiliser, vulcanisation accelerator and modified natural rubber, which saves oil resources.

6 cl, 3 dwg, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing curing agents of epoxy resins involving an operation for reacting amines with monocarboxylic acids. The method is characterised by that the amine component used is a mixture consisting of a primary aromatic amine or a mixture of aromatic amines (A), a secondary aliphatic amino alcohol (B) and a tertiary aliphatic amino alcohol (C) in weight ratio A:B:C from 98:0.2:1.8 to 80:5:15. The monocarboxylic acid (D) is used in form of a 25-80% solution in a monoatomic aliphatic or aromatic alcohol, or ester thereof with a mono- or dicarboxylic acid, in ratio (A+B+C):D from 90:10 to 60:40 per 100% acid. The reaction process is then carried out by mixing in a reactor at temperature ranging from 50 to 130°C for 20 to 120 minutes and speed of the mixer of 100 to 3000 rpm.

EFFECT: curing agents obtained using said method have high stability during storage.

1 cl, 7 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to a stabilised composition containing thermoplastic, thermoplastic elastomer, rubber or lubricant, and a liquid composition of a styrene-containing phenol compound in amount ranging from about 0.01 wt % to about 10 wt % with respect to total weight of the stabilised composition, wherein said composition of a phenol compound contains: (a) at least one 2,6-distyrene-containing p-cresol in amount ranging from about 80% to about 95% per total gas-chromatographic area; (b) at least one monostyrene-containing p-cresol in amount of more than 1% per total gas-chromatographic area; and (c) at least one tristyrene-containing p-cresol in amount of more than 1% per total gas-chromatographic area, wherein the composition contains monostyrene-containing p-cresol and tristyrene-containing p-cresol in a combination in amount ranging from 5 to 20% per total gas-chromatographic area. The present invention also relates to a polymer article and a lubricant containing said composition of a phenol compound.

EFFECT: obtaining stabilisers for polymers and lubricants with high efficiency while maintaining the required fluidity and parameters for storage at normal transportation temperatures.

13 cl, 1 dwg, 19 tbl, 14 ex

Rubber mixture // 2461591

FIELD: chemistry.

SUBSTANCE: rubber mixture contains the following in pts.wt: isoprene rubber 30-70 combined with butadiene rubber 30-70, hydrocarbon resin 0.5-3.0 combined with colophony 0.5-3.0, silane-modified talc 5-20, petroleum oil 4-10. The rubber mixture also contains the following in pts.wt: sulphur 1.2-1.8; zinc oxide 5; stearic acid 1-2; protective wax 2; N-isopropyl-N'-phenyl-n-phenylene diamine 1-2; polymerised 2,2,4-trimethyl-1,2-dihydroquinoline 2; N-cyclohexylthiophthalimide 0.2-0.3; benzoic acid 0.2-0.3; N-cyclohexyl-2-benzthiazolylsulphenamide 0.8-1.2 and technical carbon 40-50.

EFFECT: invention increases dynamic endurance of rubber in conditions where an industrial rubber article operates under pressure.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to acrylic rubber compositions which are used to make industrial rubber products, e.g., rubber hose, sealing articles, rubber vibration insulators etc. The composition contains carboxyl group-containing acrylic rubber, a diazabicycloalkene compound, a polyamine compound and a tertiary amine compound of formula (1), where each of R1, R2 and R3 independently denotes a substitute containing at least one saturated aliphatic hydrocarbon or an unsaturated aliphatic hydrocarbon with a linear structure, a branched structure or a cyclic structure, or a benzyl group. The polyamine compound is an aromatic polyamine of formula (2): H2N-Ph-M-Ph-NH2 (2) where M denotes O, S, SO2, CONH or O-R-O; R in O-R-O is Ph, Ph-Ph, Ph-SO2Ph, (CH2)m, m ranges from 3 to 5, Ph-CH2-C(CX3)2CH2-Pn, where X is H or F, or (CH2)C(CH3)2(CH2); Ph denotes a benzene ring.

EFFECT: good curing parameters and excellent combination of processability, mechanical properties of rubber and compression set of acrylic rubber compositions and curing products thereof.

9 cl, 5 tbl, 18 ex

FIELD: chemistry.

SUBSTANCE: curable rubber mixture contains natural or synthetic rubber, vulcanising substances, vulcanisation accelerators and activators, filler materials and other additives, as well as 0.5-2.0 pts.wt per 100 pts.wt composite antiageing agent rubber consisting of a powdered carrier - colloidal silica and a liquid alloy of antiageing agents obtained at 70-90°C, containing the following in pts.wt: 50-55 N-isopropyl-N-phenyl-n-phenylenediamine, 20-22 ε-caprolactam, 5-6 stearic acid, 20-22 boric acid in form of a melt obtained beforehand in ε-caprolactam at temperature 110-115°C. The alloy and the powdered carrier are in the following ratio in pts.wt: alloy of antiageing agents 55-60, colloidal silica 40-45.

EFFECT: invention increases thermal-oxidative resistance and ageing resistance in high humidity conditions.

6 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: the invention relates to car tires, to tire belt in particular. The tire belt contains a rubber composition based, at least, on a isoprene elastomer, reinforcing material, suturing system and anti-oxidant. The anti-oxidant contains 4,4'- bis(alkylamino)triphenylamine, corresponding to the formula: where R1 and R2 can be identical or different, each of them represents a branched or an unbranched alkyl residue comprising from 1 to 12 carbon atoms, or a cycloalkyl group comprising from 5 to 8 carbon atoms.

EFFECT: increases fatigue resistance and prevents crack formation in the tire belt.

15 cl, 2 dwg, 2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: rubber mixture contains the following in wt %: BNKS-18AN rubber 34.51-38.48, sulphur 0.9-1.0, sulphenamide T 1.04-1.15, N,N-diphenyl guanidine 0.07-0.12, zinc oxide 1.04-1.15, diaphene FP 0.35-0.36, acetonanyl N 0.69-0.77, colophony 0.69-0.77, stearine 0.35-0.38, ultra-high molecular weight polyethylene modified with 7 wt % natural carbon-containing material - carbosil 5.76-15.50, technical carbon P-803 27.61-30.79, technical carbon P-324 6.9-7.76, dioctyl sebacate 10.35-11.54.

EFFECT: invention improves operational, wear-resistant and frost-resistant characteristics of composite material while simultaneously providing physical and mechanical characteristics and strength properties.

2 tbl

FIELD: chemistry.

SUBSTANCE: rubber mixture based on butadiene-nitrile rubber BNKS-18 is prepared. 2-5 pts.wt synthetic magnesium nano-spinel with particle size less than 100 nm is added to 10 pts.wt powdered ultra-high molecular weight polyethylene per 100 pts.wt rubber and then mixed for 2-3 minutes in a blade mixer. The obtained composition is added to the rubber mixture on rollers or rubber mixer. The rubber mixture also contains natural rubber, sulphur, N,N-diphenylguanidine, di-(2-benzothiazolyl)-disulphide, zinc oxide, aldol-α-naphthylamine, N-(4-hydroxyphenyl)-naphthylamine-2, N-(1,3-dimethylbutyl)-N-phenylenediamine-1,4, technical carbon P803, stearic acid, dibutyl phthalate.

EFFECT: invention enables to obtain rubber with given level of operational properties with high and stable complex of operational characteristics.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used in machine-building to make wear-resistant rod packing and cylinders of hydraulic devices instead of rubber fabric chevron seals, as well as for articles for construction purposes in mining, oil and gas extraction and chemical industry. The rubber mixture based on cis-isoprene rubber SKI-3 - 100 pts.wt contains the following, pts.wt: ultra-high molecular weight polyethylene, modified 7 wt % carbonaceous material carbosil - 170, viscose fibre filler, saturated with latex-resorcinol-formaldehyde composition - banavis - 80, active technical carbon P-234 - 30, petroleum oil - softening agent - netoxol 5, zinc oxide - 5, stearic acid - 1, sulphur - 3, sulfonamide C 1.6, diaphene antiageing agent FP-1, antiozonant-acetonanil N - 1.

EFFECT: articles obtained from the rubber-polymer material have extremely high rigidity, frame structure, resistance to frictional forces, weak acid and alkaline solutions, while partially retaining elasticity, high hardness under intense wear conditions.

1 tbl

Polymer composition // 2482142

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry, particularly to production of rubber mixtures for use in making tyres for light and cargo-carrying cars. The polymer composition contains, wt %: isoprene rubber - 26.98-41.57, synthetic butadiene rubber - 3.10-8.98, non-oil filled butadiene styrene rubber - 12.41-17.97, ethylene-propylene ternary copolymer synthetic rubber - 4.96-6.00, curing agents: zinc oxide - 1.86-3.00, stearic acid - 1.24-1.79, tetramethylthiuram disulphide- 0.0991-0.1482, diphenylguanidine - 0.49-0.93, sulphur - 1.55-1.67, filler: silicic acid - 5.99-15.52, technical carbon N330 - 15.52-23.98, auxiliary ingredients: oil extender - 1.24-3.00, modifier - mixture of C50-C92 fullerenes - 0.0009-0.0018.

EFFECT: invention improves physical and mechanical properties of rubber, resistance to heat and atmospheric factors, frost resistance as well as fatigue strength of vulcanisates during dynamic loading.

1 tbl, 3 ex