Modified polymer compositions
SUBSTANCE: invention relates to modified polymer compositions, used for manufacturing vulcanised compositions and products from them. Claimed composition, containing modified polymer, includes at least one branched modified polymer macromolecule, which contains at least one of structures ib; and at least one linear modified polymer macromolecule, which contains at least one of structures iib; where at least one branched modified polymer macromolecule and at least one linear modified polymer macromolecule each, independently, includes at least one amino group, selected from group, consisting of formulae (1A-1F)
and their combinations.
EFFECT: invention provides low hysteresis loss of cross-linked elastomeric compositions, tyre treads with low rolling resistance, good adhesion to wet, as well as icy road surface.
17 cl, 19 tbl
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: invention relates to functionalised diene caoutchoucs, their obtaining, to rubber mixtures, containing the functionalised diene caoutchoucs, to the application for manufacturing highly-filled rubber moulded products, especially tyres. The functionalised diene caoutchouc is obtained by the polymerisation of dienes and vinylaromatic monomers and conversion with hydroxymercaptanes in a solvent in an amount of 0.1-5.0 g of hydroxymercaptane per 100 g of the diene caoutchouc. Conversion is carried out in the process of polymerisation.
EFFECT: tyres from the rubber mixture by the invention possess especially low rolling resistance, as well as especially high stability when moving on a wet road and wear resistance.
10 cl, 2 tbl, 13 ex
SUBSTANCE: invention relates to a method of producing a modified interpolymer of a conjugated diene-α-olefin or a modified conjugated diene polymer. The process produces silanols which have to be removed. The method includes polymerising monomers in the presence of a solvent, optionally linking part of the polymer chains with a coupling agent, modifying the polymer with a modifier dissolved in dry cyclohexane in a reactor in the presence of a solvent, contacting the solution of the modified polymer with water, removing the solvent from the reactor, contacting the removed solvent with a material containing aluminium oxide, silicon oxide and/or aluminosilicates. The material reacts with and/or adsorbs the formed silanol to obtain a purified solvent. The silanol is removed from the solvent. The purified solvent is recycled into the reactor or a storage container.
EFFECT: invention improves the quality of the obtained modified polymer by improving efficiency and lowering the cost of removing silanol.
15 cl, 8 tbl
SUBSTANCE: composition contains a cross-linked interpolymer containing one or more monomer links based on diene and cross-linked with a tetraalkoxysilane cross-linking agent. The cross-linked interpolymer (A) contains less than 30 ppm halide from the total weight of the cross-linked interpolymer and (B) molecular-weight distribution ranges from 2.0 to 2.4.
EFFECT: invention reduces corrosion and contamination of equipment.
15 cl, 2 dwg, 2 tbl, 4 ex
SUBSTANCE: modified elastomeric polymer is obtained from at least the following components: i) a living anionic elastomeric polymer; ii) a modified linking agent of formula 1: (R1O)3Si-R4-S-SiR3 3; iii) a polymer chain end modifying agent of formula 3: (R1O)x(R2)ySi-R4-S-SiR3 3.
EFFECT: invention reduces hysteresis losses, which reduces rolling resistance in the elastomeric product and saves fuel.
19 cl, 15 tbl, 33 ex
SUBSTANCE: invention relates to a method for synthesis of functionalised poly(1,3-alkadienes) and use thereof in producing impact-resistant vinyl aromatic polymers. Described is a method for synthesis of functionalised poly(1,3-alkadienes), which involves anionic polymerisation of at least one 1,3-alkadiene monomer with 4-8 carbon atoms in the presence of an organolithium compound and a non-polar solvent with a low boiling point and carrying out a step for chain termination of the 1,3-alkadiene-based polymer at the end of polymerisation by adding a bromoalkane to the polymerisation mixture, where the alkane contains 1-12 carbon atoms, after which a product containing a stable nitroxyl radical, characterised by presence of a -NO• group, soluble in said non-polar solvent, is added. The invention also describes functionalised poly(1,3-alkadienes), obtained using said method. Described is a method of producing vinyl aromatic (co)polymers that are grafted on unsaturated poly(1,3-alkadiene) in a controlled manner, involving: a) dissolving said functionalised poly(1,3-alkadiene) in a liquid phase consisting of a mixture of vinyl aromatic monomers and a polymerisation solvent in a weight ratio ranging from 60/40 to 100/0, preferably from 60/40 to 90/10; b) adding at least one radical initiator to the mixture containing the functionalised poly(1,3-alkadiene) in a solution, and polymerising the obtained mixture at a temperature equal to higher than 120°C; c) extracting the vinyl aromatic (co) polymer obtained at the end of polymerisation, and removing volatile components therefrom in a vacuum in order to extract the solvent and unreacted monomers, and d) recycling the mixture of solvent and monomers obtained when removing volatile components to step (a). Described also is an impact-resistant vinyl aromatic (co)polymer, which contains a continuous phase essentially consisting of a matrix containing at least 50 wt % vinyl aromatic monomer, and a dispersion phase essentially consisting of said functionalised elastomer in amount of 1-25 wt % relative total weight, wherein elastomer particles have a "core/cladding" morphology, and average diameter thereof ranges from 0.1 mcm to 1 mcm.
EFFECT: obtaining a functionalised compound which can then be used to produce an impact-resistant vinyl aromatic copolymer with the morphology of an elastomer phase of the core-cladding type.
9 cl, 2 tbl, 4 ex
SUBSTANCE: invention relates to production of synthetic rubbers, in particular diene (co)polymers, such as polybutadiene, polyisoprene and styrene-butadiene rubber (SBR), used in production of tyres and industrial rubber articles, in modifying bitumens, in electrical engineering and in other fields. Described is a method of producing (co)polymers which is carried out in two parallel reactors, in each of which dienes are polymerised or copolymerised with each other and/or with arylvinyl compounds. An organolithium initiator, an electron donor additive and a branching agent are fed into the first reactor, and an organolithium initiator, an electron donor additive and a functionalising agent are fed into the second reactor. The polymerised mixtures obtained in the first reactor and the second reactor are mixed with each other and a chain termination reaction is then carried out.
EFFECT: obtaining said branched compounds that are characterised by a statistical distribution of monomer units, high content of vinyl units, a narrow molecular mass distribution and a controlled content of branched and functionalised parts in the copolymer.
15 cl, 20 ex
SUBSTANCE: invention relates to functionalised polymers and methods for production thereof. The method of production includes steps of producing a reactive polymer and reacting the reactive polymer with a halosilane compound containing an amino group.
EFFECT: invention reduces hysteresis when used in caps.
9 cl, 5 tbl,13 ex
SUBSTANCE: modified polymer is obtained via polymerisation of a conjugated diene compound in the presence of a catalyst which contains a compound of a lanthanide rare-earth element in an organic solvent, followed by modification of the obtained polymer which contains an active organometallic centre with a modifier which contains a functional group capable of a substitution or addition reaction, wherein the degree of modification is not less than 15% and content of cis-1,4-links in the conjugated diene part, measured via Fourier-transform infrared spectroscopy satisfies the relationship (I): content of cis-1,4-links ≥98.00 (%)…(1), or the degree of modification is not less than 75% and content of cis-1,4-links in the conjugated diene part, measured via Fourier-transform infrared spectroscopy, satisfies the relationship (II): 94.00 (%) ≤content of cis-1,4-links <98.00 (%)…(II).
EFFECT: modified polymer has high rate of modification, provides a rubber composition which contains a modified polymer of a conjugated diene, from which a tyre with low heat generation, satisfactory damage chacteristics and high wear-resistance is obtained.
32 cl, 1 dwg, 13 tbl, 29 ex
SUBSTANCE: polymer, whose chain ends are modified, contains a product of reacting a living anionic elastomeric polymer and a silane sulphide modifier of formula: (RO)x(R)ySi-R'-S-SiR3. The invention also relates to a vulcanised composition based on the elastomeric polymer and a method of preparing said composition. The method involves combining filler, vulcanising agent, elastomeric polymer modified on chain ends and vulcanisation of the elastomeric polymer composition. The composition is used to make articles such as pneumatic tyres, tyre protectors, belts and suchlike.
EFFECT: preserving good technological properties and good balance of physical and mechanical properties, including wear resistance, breaking strength, apparent tensile stress and breaking elongation.
23 cl, 9 tbl, 19 ex
SUBSTANCE: claimed is a method of obtaining borated 1,2-polybutadienes, consisting in the interaction of a polymer with a borating agent, characterised by the fact that before the stage of borating aluminisation and hydroxylation of 1,2-polybutadiene are carried out, where as an aluminising agent used is a mixture of diisobutylaluminium chloride in the presence of (i-OPr)4Ti with a molar ratio of 1,2-polybutadiene:diisobutylaluminium chloride=1:0.2-4, 1,2-polybutadiene:(i-OPr)4Ti=1:0.01-0.02 at a temperature of 10-55°C for 12-26 h, hydroxylation of the aluminium derivative of 1,2-polybutadiene is carried out by the action of a hydroxylating agent, which is represented by air oxygen, by hydroxylation of the reaction mass at room temperature for 7-20 h, after which borating is carried out by means of the borating agent, consisting of boric acid and a sodium hydroxide solution, with a molar ratio hydroxylated 1,2-polybutadiene:boric acid 1:0.2-1.3, boric acid:sodium hydroxide 1:0.5-4.2 at room temperature for 0.5-4 h.
EFFECT: reduction of energy consumption and elimination of toxic reagents from the process of synthesis.
2 cl, 1 tbl, 17 ex