Polymer composition

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

 

The invention relates to the chemical industry, in particular the production of rubber compounds for use in the manufacture of tyres passenger car and truck production.

Known polymeric composition for sidewalls, which contain a combination of natural isoprene rubber with rubber special purpose [Zinchenko, NP, Buiko G.N., Andreeva B.C., Frolova BV formulations of the white sidewalls of passenger tires /tire Production & ATI. - 1968. No. 2. - P.1-4; Application 58-34834. Japan, MKI4C98L 9/00, VS 1/00. Rubber compound for white sidewall tires/ Mizumoto Yasuhiro, Kurozawa Masahiro, kojima Masatoshi, Tatoo Noriaki. Declared 27.08.82. Publ. 01.03.83].

The disadvantage of these materials are low frost resistance, poor resistance to atmospheric aging and insufficient fatigue endurance dynamic immersion.

The closest in technical essence and the achieved effect is a polymer composition with improved characteristics [RF patent №2355719, IPC C08L 9/00, C08L 9/06, C08K 3/04, C08K 3/06, C08K 3/22, C08K 3/24, C08K 3/36, C08K 5/31, C08K 5/40, Polymer composition, Popov, G.V., Igumenova TI, kleimenova, N., publ. 20.05.2009, bull. No. 14, the priority date of 27.11.2007], including isoprene rubber, butadiene rubber, nemalokureznyh the best choice rubber, white is inmovie, the stearic acid, sulfur polymer, fullerenelike carbon (FTU), kremnekislyh, tetramethylsilane in the specified amounts.

The disadvantage of this material is not sufficient frost resistance, low resistance to atmospheric aging and low fatigue endurance under dynamic loading.

The technical problem of the invention is to develop a formulation of a polymeric composition that can provide the required physical and mechanical properties of products, resistance to heat and weather, frost resistance, and fatigue endurance of vulcanizates under dynamic loading.

For the technical solution of the invention proposed polymer composition comprising a polymer base: rubber, isoprene rubber, synthetic rubber butadiene, namakarana the best choice rubber, synthetic rubber ethylene-propylene ternary copolymer, and vulcanizing agents, such as zinc white, stearic acid, tetramethylthiuramdisulphide, diphenylguanidine, sulfur; fillers, such as kremachoclet, carbon black; auxiliary ingredients, such as oil softener, the modifier is a mixture of fullerenes fraction C50-C92when the next selection of the ratio of ingredients, wt.%:

the isoprene rubber41,57-26,98
namakarana the best choice rubber12,41-17,97
rubber ethylenepropylene ternary copolymer4,96-6,00
butadiene rubber3,10-8,98
zinc white1,86-3,00
stearic acid1,24-1,79
softner oil1,24-3,00
kremachoclet15,52 of 5.99
technical carbon N33015,52-23,98
a mixture of fullerenes With50-C920,0009-0,0018
tetramethylthiuramdisulphide0,0991-0,1482
diphenylguanidine0,93-0,49
sulfur1,55-1,67

The technical result of the invention is to improve the resistance to low temperatures, atmospheric and thermal aging by preserving the required level of physical and mechanical properties, increase resistance to fatigue endurance.

Application of the proposed combination of rubbers due to the following conditions: isoprene rubber provides a solid polymeric composition, the rubber ethylene-propylene ternary copolymer provides ozone resistance and weather resistance of the composition, namakarana the best choice rubber attached polymeric composition more resistant to heat and fatigue endurance of vulcanizates under dynamic loading, polybutadiene rubber, provides the necessary level of hardiness.

Use in the formulation of a mixture of fullerenes With50-C92[Akatov Y.S., Igumenova TI, Gudkov, M.A. Analysis of the interaction of the fullerene compound with the dynamic loading of rubber. Proceedings of the XXI Symposium "Problems of tires and rubber-cord composites, LLC STC "NISP", Moscow, 2010, vol. 1, s-159] allows to obtain a high level of physical-mechanical properties of vulcanizates due to its complex functional effects on the polymer matrix, the mixture of fullerenes provides increased heat resistance of the polymer composition as the acceptor of free radicals and ottseplyayuschimsya during aging of hydrogen and due to the effect on the crystallization of rubber at low temperature which provides an additional increase frost resistance of rubber compounds as a modifier.

Developed polymer composition has good technological properties, is easily processed on existing equipment and does not require readjustment, the finished product is non-toxic and environmentally safe.

Polymer compositions made according to the proposed formulation can be applied independently for the manufacture of rubber products for various household purposes, and for creating structural products together with rubbers based on General purpose rubbers, in particular tyres for passenger cars and commercial range.

Method of preparation of colored polymer composition is as follows.

On a technical scale weigh rubber and other ingredients. On the pre-warmed to 65±5°C roll mill mixed together rubber (isoprene rubber, ethylene-propylene rubber ternary copolymer, synthetic rubber butadiene, namakarana rubber is the best choice), then add ingredients include carbon black N 330, zinc white, stearic acid, softner oil, kremachoclet, a mixture of fullerenes With50-C92, tetramethylthiuramdisulphide, diphenylguanidine, sulfur; the mixture is cooked for 20 minutes and removed in the form of a sheet at a temperature not higher than 100°C; the resulting rubber mixture is cooled in air is about 25-30°C and re-make clean gasket.

The polymer composition is prepared with the following choice of the ratio of ingredients, wt.%:

the isoprene rubber41,57-26,98
nemelovannyj the best choice rubber12,41-17,97
rubber ethylene-propylene ternary copolymer4,96-6,00
butadiene rubber3,10-8,98
zinc white1,86-3,00
stearic acid1,24-1,79
softner oil1,24-3,00
kremachoclet15,52 of 5.99
technical carbon N33015,52-23,98
a mixture of fullerenes With50-C920,0009-0,0018
tetramethylrhodamine0,0991-0,1482
diphenylguanidine0,93-0,49
sulfur1,55-1,67

The method is illustrated in the following the mi examples.

Example 1 (prototype).

Samples are prepared on a roll mill at a temperature of rolls 65±5°C for 20 minutes in the following ratio, wt.%: isoprene rubber 39,65; butadiene rubber 15,84; namakarana butadiene rubber 23,77; zinc white 3,96; stearic acid 1,58; sulfur polymer 1,58; fullerenelike carbon 0,79; kremachoclet 11,88; tetramethylthiuramdisulphide 0,16; diphenylguanidine 0,79. First roll all rubbers for 3 min, then add all ingredients except sulphur, tetramethylthiuramdisuphide and diphenylguanidine, rolls 13 min; after that, cut from roll half of the mixture (up to small stock) and in the remaining half of the injected sulfur, tetramethylthiuramdisulphide, diphenylguanidine, rolls 1 min and add the second half cut masterbatches. Mixed in the mill for another 3 minutes Total duration of mixing is 20 minutes. Obtained in the form of sheet rubber mixture is cooled in air to 25-30°C and re-make clean gasket.

Example 2.

To prepare 1 kg (100.000 wt.%) rubber mixture on a technical scale weigh 0.2698 kg (26.98 wt.%) rubber isoprene, 0.1797 kg (17.97 wt.%) namakarana butadiene rubber, 0.060 kg (6 wt.%) rubber ethylene-propylene triple, 0.0898 kg (8.98 wt.%) butadiene rubber, 0.03 kg (3 wt.%) zinc white, 0.0179 kg (1.79 wt.%) to the slots stearic, 0.03 kg (3 wt.%) softener oil, 0.0599 kg (5.99 wt.%) silicic acid, 0.2398 kg (23.98 wt.%) carbon technical N 330, 0.000018 kg (0.0018 wt.%) a mixture of fullerenes With50-C92, 0.0167 kg (1.67 wt.%) sulfur, 0.0015 kg (0.1482 wt.%) the tetramethylthiuramdisuphide, 0.0049 kg (0.49 wt.%) diphenylguanidine. The polymer composition is prepared PA rollers at a temperature of 55°C and the gap between the rollers 2 mm. First roll together all the rubbers for 3 min, then add all ingredients except sulphur, tetramethylthiuramdisuphide and diphenylguanidine, rolls 13 Tits; then cut with roll half of the mixture (up to small stock) and in the remaining half of the injected sulfur, tetramethylthiuramdisulphide, diphenylguanidine, rolls for 1 minute, and add the second half cut masterbatches. Mixed in the mill for another 3 minutes Total duration of mixing is 20 minutes. Obtained in the form of sheet rubber mixture is cooled g in air up to 25-30°C and re-make clean gasket.

The finished rubber mixture analyze and determine: conditional tensile strength, elongation at break (GOST 21751), elasticity (GOST 108), the fatigue strength of rubbers during repeated stretching (GOST 261), thermal aging (GOST 9.024-74). The data analysis presented in the table.

Example 3.

Preparation of a polymeric composition as in example 2 when SL is blowing ratio of ingredients used: to prepare 1 kg (100.000 wt.%) rubber mixture on a technical scale weigh 0.4157 kg (41.57 wt.%) rubber isoprene, 0.1241 kg (12.41 wt.%) namakarana butadiene rubber, 0.0496 kg (4.96 wt.%) rubber ethylene-propylene triple, 0.031 kg (3.1 wt.%) butadiene rubber, 0.0186 kg (1.86 wt.%) zinc white, 0.0124 kg (1.24 wt.%) of stearic acid, 0.0124 kg (1.24 wt.%) softener oil, 0.1552 kg (15.52 wt.%) silicic acid, 0.1552 kg (15.52 wt.%) carbon technical N 330, 0.000009 kg (0.0009 wt.%) a mixture of fullerenes With50-C92, 0.0155 kg (1.55 wt.%) sulfur, 0.000991 kg (0.0991 wt.%) the tetramethylthiuramdisuphide, 0.0093 kg (0.93 wt.%) diphenylguanidine. The polymer composition is prepared on a roll mill at a temperature of 55°C and the gap between the rollers 2 mm. First roll together all the rubbers for 3 min, then add all ingredients except sulphur, tetramethylthiuramdisuphide and diphenylguanidine, rolls 13 min; after that, cut from roll half of the mixture (up to small stock) and in the remaining half of the injected sulfur, tetramethylthiuramdisulphide, diphenylguanidine, rolls 1 min and add the second half cut masterbatches. Mixed in the mill for another 3 minutes Total duration of mixing is 20 minutes. Obtained in the form of sheet rubber mixture is cooled in air to 25-30°C and re-make clean gasket.

The finished rubber mixture analyzed analogously to example 1. The analysis presented in the table.

Table
IndexThe placeholderData analysis examples
12
Conditional tensile strength, MPa18.2-20.118.522.4
Elongation at break, %450-460460540
Shore a hardness, $.70-716972
Elasticity but the rebound, %57-635450
Low temperature brittleness, °C-58-72-69
The coefficient on strength after thermal ageing at 100°C, 72 hours0.54-0.560.780.82
Fatigue endurance during repeated stretching, testicle.2.5-3.0 8.3a 12.7

As can be seen from the table, the proposed polymer composition is not inferior but physico-mechanical properties of the prototype, has a lower temperature brittleness, which indicates improved frost resistance in comparison with the prototype, as well as the elevated levels of factor strength after thermal aging and fatigue endurance during repeated stretching.

If from the formulation of this polymeric composition to exclude a mixture of fullerenes With50-C92it will have a lower physical and mechanical properties, poor frost resistance and lower resistance to dynamic loads that do not meet the requirements of the invention.

The proposed polymer composition allows the manufacture of tires and rubber products with enhanced performance characteristics, as well as to expand the temperature range of their application.

Polymer composition comprising a polymer base: rubber, isoprene rubber, synthetic rubber butadiene, namakarana the best choice rubber, synthetic rubber ethylene-propylene ternary copolymer, and vulcanizing agents, such as zinc white, stearic acid, tetramethylthiuramdisulphide, diphenylguanidine, sulfur; fillers, such as kremachoclet, technical the ski N330 carbon; auxiliary ingredients, such as oil softener, the modifier is a mixture of fullerenes fraction C50-C92in the following ratio of ingredients, wt.%:

the isoprene rubber26,98-41,57
namakarana the best choice rubber12,41-17,97
rubber ethylene-propylene ternary copolymer4,96-6,00
butadiene rubber3,10-8,98
zinc white1,86-3,00
stearic acid1,24-1,79
softner oil1,24-3,00
kremachoclet5,99-15,52
technical carbon N33015,52-23,98
a mixture of fullerenes fraction C50-C920,0009-0,0018
tetramethylthiuramdisulphide0,0991-0,1482
diphenylguanidine0,49-0,93
sulfur1,55-1,67



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to rubber-cord composites and can be used in the tyre and industrial rubber industry. The rubber-cord composite consists of a layer of textile cord which is saturated with a latex-resorcinol-formaldehyde composition based on latex DBA-1 - a copolymer of butadiene, butyl acrylate, methacrylic acid amide or based on latex with vinyl pyridine links, optionally with another latex and optionally containing blocked E-caprolactam polyisocyanate, and a rubber layer. The rubber layer is made from a composition based on unsaturated rubber, with the following ratio of components of the rubber layer, pts.wt: unsaturated rubber - 100; ground technical sulphur - 0.5-0.8; polymeric sulphur - 1.0-1.5; sulphamide TS 0.2-0.4; altax - 0.4-0.7; technical carbon N 550 - 50-55; stearic acid - 1-2; oil-softener - 7-16; resin Pikar - 0.5-2.0; diaphene FP-1-2.5; pine rosin -1-3; zinc oxide - 5-6; modifier RU-D - 1-4 or resin modifier R-17-34 -0.8-1.5; white soot - 5-10; kaolin KR-1- 1-4.

EFFECT: invention increases strength of the textile cord-rubber bond.

2 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: concentrated binding substance contains at least 50 wt % a soft aromatic petroleum base, at least one polymer and optionally an asphalt base. The soft aromatic petroleum base contains one or more aromatic petroleum fractions taken separately or in form of mixtures, where said aromatic petroleum fractions are obtained during dearomatisation of petroleum fractions obtained when refining crude oil. The polymer contains one or more copolymers based on links of conjugated diene and an aromatic monovinyl hydrocarbon and content of its binding substance is greater than or equal to 20 wt %. The invention also relates to a method of producing a concentrated binding substance and use thereof to produce diluted asphalt-polymer binding substance which is used in various areas of road construction, as well as for industrial use.

EFFECT: binding substance has slowed gelling, is stable during storage and has low viscosity, which allows for its pumping using ordinary pumping systems.

15 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing polymer-asphalt binder materials which can be used in road construction. The binder contains asphalt, a block copolymer of alkadiene and styrene, a paraffin-naphthene plasticiser and an aromatic plasticiser. The aromatic plasticiser used is an extract from selective oil purification, and the paraffin-naphthene plasticiser used is a vacuum distillate of the 340-530°C fraction. Components are in the following ratio, in wt % of the weight of the binder: aromatic plasticiser - 3.0-6.0, block copolymer of alkadiene and styrene - 3.0-3.5, vacuum distillate of the 340-530°C fraction - 3.0-9.0, asphalt - up to 100. The method of producing the binder involves successively adding to asphalt at 150-160°C, while stirring, the aromatic plasticiser, the block copolymer of alkadiene and styrene until full dissolution, and then the paraffin-naphthene plasticiser.

EFFECT: method increases the degree of homogenisation of asphalt compositions, thus widening the operating range thereof, which is characterised by softening temperature and brittleness temperature, reduces specific energy consumption when producing polymer-asphalt binder, as well as cost thereof.

2 cl, 1 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a decorative surface coating which can be obtained from a curable composition, wherein said composition contains a first polymer component consisting of a styrene-butadiene styrene block-copolymer (SBS); a second polymer component which is selected from a group consisting of a random or partially random copolymer of butadiene and styrene (SBR) and nitrile butadiene rubber (NBR); a third polymer component consisting of a styrene butadiene copolymer (HSR) having high styrene content, filler, a cured system and additives which are selected from a group consisting of process additives, stabilisers, pigments and substances which stabilise the mixture of immiscible polymers.

EFFECT: improved composition for decorative surface coating which essentially does not contain halogens and is compatible with conventional PVC extrusion equipment.

FIELD: chemistry.

SUBSTANCE: invention relates to polymerisation of isoolefins and polyolefins for producing butyl rubber based polymers filled with silicon dioxide. The method involves dispersion of siliceous nanoclay, containing a quaternary onium ion as a substitute, in an organic solvent which is suitable for use as a polymerisation medium for butyl rubber, particularly methyl chloride. At least one isoolefin monomer and at least one polyolefin monomer are then dissolved in an organic solvent. Further, the isoolefin monomer and polyolefin monomer are polymerised in the presence of nanoclay. Said method enables to obtain a nanocomposite material containing a butyl rubber based polymer intercalated with nanoclay. Addition of nanoclay into the liquid polymerisation medium essentially does not affect the rate of polymerisation.

EFFECT: obtained polymers, which are filled with silicon dioxide, have improved impermeability compared to non-filled polymers.

16 cl, 2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a modified (co)polymer based on a conjugated diene, a modified (co)polymer based on a conjugated diene and a rubber composition. The method involves a step (a) for obtaining primarily modified polymer as a result of a primary modification reaction, where one component selected from a group consisting of an alkoxy silane compound and a silanol compound is introduced into an alkali metal-containing active terminal group of the (co)polymer based on the conjugated diene, and a step (b) for obtaining a secondarily modified (co)polymer based on a conjugated diene as a result of conducting reactions, including step (b1) and step (b2) for the obtained primarily modified polymer. Step (b1) includes a reaction with a condensation accelerator containing a metal element. Step (b2) includes a reaction with one component selected from a group consisting of inorganic acids and metal halides.

EFFECT: invention enables to obtain a (co)polymer based on a conjugated diene, characterised by high Mooney viscosity and excellent stability of shape, and a composition with low heat release and improved wear resistance.

13 cl, 8 tbl, 16 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and particularly to production of ozone-resistant rubber mixtures for making colour or white sidewalls of car and bicycle tyres, as well as for protective and decorative elements of sidewalls of truck and light-truck range of tyres. The colour polymer composition contains the following, wt %: isoprene rubber SKI-3 S or natural rubber-28.07-32.2; ethylene propylene triple rubber SKEPT-40 5.37-16.84; non-oil filled butadiene styrene rubber SKS-30ARK 11.23-16.1; curing agents: rhombic sulphur 1.12-1.62; sulphenamide TS 0.27-0.84; thiuram D 0.06-0.27; filler materials: wollastonite with a needlelike structure 10.73-22.459; titanium white 2.81-5.37; zinc white 2.81-5.37; white soot BS-120 11.23-21.46; auxiliary ingredients: phthalic anhydride 0.16-0.28; stearic acid 1.07-1.68; optional colouring pigment 0-0.56; mixture of fullerenes C50-C92 0.005-0.011.

EFFECT: composition improves physical and mechanical properties and fatigue strength of tyre sidewalls, as well as wear-resistance and heat ageing resistance due to atmospheric factors and operation at high temperatures.

1 tbl, 2 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: composition contains butadiene-styrene rubber SKS-30-ARM, a product of secondary processing rubber and target additives of sulphur, altax, zinc oxide, stearic acid and a plasticiser. The product of secondary processing rubber contained in the composition is modified ground rubber crumbs obtained from grinding rubber in the presence of 0,0'-bis-(1,3,5-tri-tertbutylcyclohexadien-2,5-on-4-yl)-2-methyl-5-iso-propyl-n-benzoquinone-dioxine with the following ratio of components in wt %: butadiene-styrene rubber SKS-30-ARM 100; modified rubber crumbs 20.0-50.0; sulphur 0.5-1.5; altax 0.5-1.0; zinc oxide 0.5-1.0; stearic acid 0.5-1.0; plasticiser 3.0-5.0.

EFFECT: improved physical and mechanical properties of the composition and improved environmental friendliness.

2 cl, 1 tbl, 12 ex

Rubber mixtures // 2435803

FIELD: chemistry.

SUBSTANCE: invention relates to rubber mixtures and can be used in moulded articles. The rubber mixture contains (A) at least one butadiene-styrene rubber, (B) at least one filler and (C) at least one (poly)sulphide organo(alkylpolyether silane) of general formula [(x) (x') (x")Si-RI]2-Sm (I). The rubber mixture is obtained by mixing at least one butadiene-styrene rubber, at least one filler and at least one (poly)sulphide organo(alkylpolyether silane) of formula I.

EFFECT: invention enables to lower release of alcohol when mixing a rubber mixture and increase the elongation ratio at break of rubber while preserving rapture resistance properties.

7 cl, 6 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rubber-cord composites and can be used in the tyre and industrial rubber industry. The rubber-cord composite consists of a layer of textile cord which is saturated with a latex-resorcinol-formaldehyde composition based on latex DBA-1 - a copolymer of butadiene, butyl acrylate, methacrylic acid amide or based on latex with vinyl pyridine links, optionally with another latex and optionally containing blocked E-caprolactam polyisocyanate, and a rubber layer. The rubber layer is made from a composition based on unsaturated rubber, with the following ratio of components of the rubber layer, pts.wt: unsaturated rubber - 100; ground technical sulphur - 0.5-0.8; polymeric sulphur - 1.0-1.5; sulphamide TS 0.2-0.4; altax - 0.4-0.7; technical carbon N 550 - 50-55; stearic acid - 1-2; oil-softener - 7-16; resin Pikar - 0.5-2.0; diaphene FP-1-2.5; pine rosin -1-3; zinc oxide - 5-6; modifier RU-D - 1-4 or resin modifier R-17-34 -0.8-1.5; white soot - 5-10; kaolin KR-1- 1-4.

EFFECT: invention increases strength of the textile cord-rubber bond.

2 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rubber-cord composites and can be used in the tyre and industrial rubber industry. The rubber-cord composite consists of a layer of textile cord which is saturated with a latex-resorcinol-formaldehyde composition based on latex DBA-1 - a copolymer of butadiene, butyl acrylate, methacrylic acid amide or based on latex with vinyl pyridine links, optionally with another latex and optionally containing blocked E-caprolactam polyisocyanate, and a rubber layer. The rubber layer is made from a composition based on unsaturated rubber, with the following ratio of components of the rubber layer, pts.wt: unsaturated rubber - 100; ground technical sulphur - 0.5-0.8; polymeric sulphur - 1.0-1.5; sulphamide TS 0.2-0.4; altax - 0.4-0.7; technical carbon N 550 - 50-55; stearic acid - 1-2; oil-softener - 7-16; resin Pikar - 0.5-2.0; diaphene FP-1-2.5; pine rosin -1-3; zinc oxide - 5-6; modifier RU-D - 1-4 or resin modifier R-17-34 -0.8-1.5; white soot - 5-10; kaolin KR-1- 1-4.

EFFECT: invention increases strength of the textile cord-rubber bond.

2 tbl, 12 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of construction materials, particularly, to fabrication of compacted wood biological composite materials. Proposed method comprises making biological composite material including biological binder and saw dust. Produced material is dried to make a mat by cold compaction and subjected to hot forming. Saw dust is mixed with biological binder based on culture broth obtained in cultivation of Leuconostoc mesenteroides bacterium on nutrient medium. Said medium consists of the mix of molasses, wastes of sugar production, and lactoserum taken in the ratio of 2:2:1 at temperature 24-26°C for 72-96 hours in static conditions with addition of liquid glass in concentration of 2.5 wt %.

EFFECT: moisture-resistant nonpolluting materials without phenol compounds.

1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of construction materials and tar-concrete mixtures which can be used to make and repair roads and pavements. The tar-concrete mixture contains the following, wt %: coal tar 6.0-8.0; thermal power plant ash 84.0-88.0; crushed natural rock 6.0-8.0.

EFFECT: high frost resistance.

1 tbl

FIELD: chemistry.

SUBSTANCE: concentrated binding substance contains at least 50 wt % a soft aromatic petroleum base, at least one polymer and optionally an asphalt base. The soft aromatic petroleum base contains one or more aromatic petroleum fractions taken separately or in form of mixtures, where said aromatic petroleum fractions are obtained during dearomatisation of petroleum fractions obtained when refining crude oil. The polymer contains one or more copolymers based on links of conjugated diene and an aromatic monovinyl hydrocarbon and content of its binding substance is greater than or equal to 20 wt %. The invention also relates to a method of producing a concentrated binding substance and use thereof to produce diluted asphalt-polymer binding substance which is used in various areas of road construction, as well as for industrial use.

EFFECT: binding substance has slowed gelling, is stable during storage and has low viscosity, which allows for its pumping using ordinary pumping systems.

15 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: concentrated binding substance contains at least 50 wt % a soft aromatic petroleum base, at least one polymer and optionally an asphalt base. The soft aromatic petroleum base contains one or more aromatic petroleum fractions taken separately or in form of mixtures, where said aromatic petroleum fractions are obtained during dearomatisation of petroleum fractions obtained when refining crude oil. The polymer contains one or more copolymers based on links of conjugated diene and an aromatic monovinyl hydrocarbon and content of its binding substance is greater than or equal to 20 wt %. The invention also relates to a method of producing a concentrated binding substance and use thereof to produce diluted asphalt-polymer binding substance which is used in various areas of road construction, as well as for industrial use.

EFFECT: binding substance has slowed gelling, is stable during storage and has low viscosity, which allows for its pumping using ordinary pumping systems.

15 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: composition contains at least one bitumen and at least one graft polymer, having a polymer backbone chain and at least one side graft component linked to the polymer backbone chain. Said graft component has a branched or straight saturated hydrocarbon chain having 18-110 carbon atoms. The graft polymer is obtained by reacting at least one double bond of the polymer and a thiol group of the graft component, where the polymer is obtained by copolymerisation of diene monomers. The invention also relates to a method of preparing such thermoreversibly crosslinked bitumen-polymer compositions, as well as use of such compositions in road construction, particularly for producing binding materials for roads, and in different industries.

EFFECT: bitumen-polymer compositions have, at operating temperatures, properties of bitumen-polymer compositions which are irreversibly cross-linked, particularly in terms of elasticity and stickiness, and have low viscosity at treatment temperatures.

17 cl, 1 tbl, 4 ex

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

FIELD: chemistry.

SUBSTANCE: invention relates to production and application of stabilisers of macadam-mastic asphalt-concrete and asphalt-concrete mixtures for road surfaces. The stabilising additive for macadam-mastic asphalt-concrete mixture contains a natural fibrous structure-forming agent and bitumen. The structure-forming agent used is the medium fibrous humus-bitumen fraction from ground dry peat with particle size of not more than 2.5 mm and an adhesion additive is added, with the following ratio of components, wt %: said ground peat 50…100, adhesion additive 0…50. Also described is a version of the stabilising additive and a method of producing a structure-forming agent from peat.

EFFECT: production of a stabilising additive for macadam-mastic asphalt-concrete and asphalt-concrete mixtures, which provide high characteristic values of the road surface at a low cost and easier production thereof using abundant cheap material.

12 cl, 17 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of compositions containing asphalt and sulphur which can be used in road and other construction. The method of producing sulphur-asphalt compositions involves merging, while stirring, an asphalt-concrete mixture heated to temperature of 140-150°C and sulphur granules having geometrical dimensions not greater than 10 mm, obtained by granulation of a mixture containing 86.21-90.50 wt % of powdered sulphur having particle size not greater than 0.5 mm, 9.05-12.93 wt % of an organic component having melting point higher than 70°C (substances containing fatty acids or saturated C18H38…C55H112 hydrocarbons) and 0.45-0.86 wt % of an emission neutraliser (metal oxides or mixtures thereof which form water-insoluble or partially soluble sulphides and/or sulphites with said gases).

EFFECT: improved technology of producing sulphur-asphalt compositions, reducing emission of hydrogen sulphide and sulphur dioxide when producing, transporting and applying a sulphur-asphalt-concrete mixture.

1 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a polymer dispersion for improving viscosity index of engine oil and a method for production thereof. The dispersion contains: A) at least one dispersed polyolefin, B) at least one dispersing component, C) mineral oil and D) at least one glycerol ester obtained from unsaturated carboxylic acids having 8-30 carbon atoms. Component (A) contains one or more olefin copolymers, hydrogenated polyisoprene, a hydrogenated butadiene/isoprene copolymer or a hydrogenated copolymer of butadiene/isoprene and styrene. Component (B) is a copolymer which contains one or more blocks A and one or more blocks X, wherein block A is a series of olefin copolymerisates, a series of hydrogenated polyisoprene, hydrogenated butadiene/isoprene copolymers or hydrogenated copolymers of butadiene/isoprene and styrene, and block X is a polyacrylate-, polymethacrylate-, styrene-, α-methylstyrene- or N-vinyl-heterocyclic series and/or series of mixtures of polyacrylate-, polymethacrylate-, styrene-, α-methylstyrene- or N-vinyl-heterocyclic rings.

EFFECT: preparation of dispersions according to the invention requires relatively less power consumption and the polymer dispersions have good low-temperature properties.

35 cl, 1 ex

Up!