Rubber mixture for production of diaphragms of formator-vulcanisers
SUBSTANCE: invention relates to rubber industry and deals with production of rubber products such as tyres, etc. Rubber mixture contains mixture of caoutchoucs, wt.p - butylcaoutchouc - 75-90, chloroprene caoutchouc - 0-10 and chloride-containing ethylene-propylene-diene filled caoutchouc 7-20. Chloride-containing ethylene-propylene-diene caoutchouc is obtained by mixing ethylene-propylene-diene and chloride-containing caoutchouc in presence of silicon colloidal dioxide. Rubber mixture contains also per 100 wt.p of mixture of caoutchoucs: stearic acid -1-3, zinc oxide - 4-10, technical carbon-30-60, mineral oil "stabiloil" -3-8 and phenol-formaldehyde resin "amberol137" -5-10.
EFFECT: obtaining rubber which has reduced creep and pitching, as well as increased dynamic durability.
The invention relates to the formulation of rubber compounds and can be used in the rubber industry in the manufacture of tires and rubber products.
Known rubber mixture based on chloroprene and isoprene rubbers, including as modifier chlorosarin (SU 516718, 1976). However, the rubber obtained from the rubber mixture, have considerable abrasion.
Known other rubber mixture based on chloroprene and butadiene-methylstyrene rubbers, including zinc white, carbon black, N-phenylnaphthylamine - 2, di (2-benzothiazolyl) disulfide, sulfur, stearic acid, paraffin wax and industrial oil. Get rubber have high strength characteristics, but have a high abrasion (Technical terms for parts of automobile and tractor engineering, No. 38-005-204-71).
From SU 1054379, 15.11.1983 known rubber mixture based on chloroprene and butadiene-methylstyrene rubbers, including zinc white, carbon black, N-phenylnaphthylamine-2, di (2-benzothiazolyl) disulfide, sulfur, stearic acid, paraffin wax, industrial oil, Polyoxypropylenediamine or Polyoxypropylenediamine when certain ratios of these components. The resulting rubber compound has a high resistance to abrasion, but do not possess the AET necessary properties, which is an object of the invention.
From RU 2296782, 10.04.2007 known rubber compound, which contains isoprene rubber, filled chloroticus obtained by the interaction with the mixture of butyl rubber and chlorinated hydrocarbon with the General formula CnH(2n+2)-xCLxwhere n=10-30, x=7-24 at a temperature of 80-150°C in the presence of colloidal silicon dioxide is introduced into the mixture during mixing, sulfur, sulfenamide accelerator, stearic acid, zinc oxide, carbon black, polyethylene, alkylenediamine resin. The technical challenge is to improve the protection of rubber against possible premature vulcanization in the processes of its production and processing. However, the known rubber compound does not have the necessary combination of properties and is designed for the sealing layer in the production of tubeless tyres and pneumatic elements.
The technical objective of the claimed invention is to reduce creep, osmolality and increase the dynamic endurance of rubbers for diaphragms of the shaper-vulcanizers.
The goal of the project is achieved in that the rubber mixture for the production of diaphragms of shaper-vulcanizers includes butyl rubber, chloroprene rubber and chlorinated ethylene-propylene-diene-filled rubber, the floor is built by mixing ethylene-propylene-diene rubber and a chlorinated hydrocarbon with the General formula C nH(2n+2)-xCLxwhere n=10-30, x=7-24 at a temperature of 80-150°C in the presence of colloidal silicon dioxide is introduced into the mixture during mixing, as well as the rubber mixture contains per 100 parts of the mixture of rubber stearic acid, zinc oxide, carbon black, mineral oil "Stabilis" and phenol-formaldehyde resin "Amberol-137" in the following ratio of the components of the rubber mixture in parts by weight:
|Butyl rubber||of 75.0 to 90.0|
|The above chlorine|
|ethylene-propylene-diene-filled rubber||of 7.0 to 20.0|
|Mineral oil "Stabilis"||3,0-8,0|
|The phenol-formaldehyde resin "Amberol-137"||5,0-10,0|
In the rubber mixtures according to the invention is used, n is the sample, as a butyl rubber - butyl rubber BK-1675, carbon black - carbon black N 330 (PW-75), mineral oil - oil "Stabilis", phenol-formaldehyde resin - resin "Amberol-137".
As the chlorinated ethylene-propylene-diene rubber in the rubber mixture according to the invention contains a chlorinated ethylene-propylene-diene rubber HEPDB-2, obtained, for example, based on the following technologies:
In the rubber mixer type rvsd frequency (Freccia 1:1.5) loaded ethylene-propylene-diene elastomer (SEPT-60) in an amount of 95 parts by weight is Then loaded chlorinated hydrocarbon of the formula CnH(2n+2)-xClxwhere n=20, x=21 in an amount of 5 parts by weight of the Mixture is processed at a temperature of 80°C and the rotational speed of rotor, rpm: front 30, rear - 45. At the 11th minute in the mixer is loaded with 5 parts by weight of colloidal silicic acid (SiO2). The resulting product contains combined chlorine 2.0 to 2.3 wt.%.
Applying a new chlorinated ethylene-propylene-diene rubber with a chlorine content of 2±0,5% molar chlorine (HEPDB-2) instead of 15 parts by weight of butyl rubber BK-1675 in recipes rubber diaphragm allows to optimize the number of specific characteristics (creep, dynamic endurance, osmolality), which can lead to a substantial increase in service life of the diaphragms of the shaper-vulcanizers. The application of the new rubbers is as HEPDB-2 also allows you to increase the conditional tensile strength, elasticity to rebound and relative residual elongation after break with maintaining other properties of the rubber mixtures and vulcanizates at the required level.
The following example illustrates the invention but does not limit it (see table 1). For comparison with the rubber mixture according to the invention was prepared by famous rubber mixture for the production of diaphragms of shaper-vulcanizers (technological regulations of the Moscow tire plant No. 404 W-89 "Production of passenger radial tires with steel cord breaker").
The rubber mixture is prepared in a rubber mixer rvsd frequency-250-40 in two stages. The first stage is the duration of mixing for 15 minutes, the temperature of the discharge 175°C, the second stage is the duration of mixing 5 min, temperature of discharge 120°C. In the second stage is entered zinc oxide and phenol-formaldehyde resin.
The vulcanization of the mixtures is carried out in a press at a temperature of 175°C. Plastoelastic, physico-mechanical and some specific properties of rubber mixtures and vulcanizates determined in accordance with existing state Standards. Osmolality rubbers is determined in accordance with the methodology described in the dissertation on competition of a scientific degree of candidate of technical Sciences Turgumbaeva HH (Research Sept tire rubbers, Moscow, MITHT, 1968, 136 S.).
|Components||The content of components in parts by weight per 100 parts by weight rubber in the mixture|
|known under the rules||according to the invention|
|Butyl rubber BK-1675||95,0||80,0|
|Carbon black N 330 (PW-75)||50,0||50,0|
|The phenol-formaldehyde resin "Amberol-137"||8,0||8,0|
The properties of the rubber mixtures according to the invention is known and is presented in table 2.
|Properties||The performance properties of rubber mixtures and vulcanizates|
|known under the rules||according to the invention|
|Plasticity, srvc. units||0,41||0.42|
|The Mooney viscosity at 140°C, srvc. units||37||36|
|Conventional tensile strength elongation 300%, MPa||5,0||6,0|
|Conditional tensile strength, MPa||10,2||12,6|
|Elongation at break, %||620||600|
|Relative residual elongation after break, %||34||20|
|Tear resistance, kN/m||60||63|
|The coefficient of thermal aging at 180°C for 24 h (in terms of relative strength)||0,6|
|The coefficient of temperaturesalinity at 100°C (relative strength)||0,7||0,62|
|Hardness TM-2, sm. units||74||78|
|Dynamic endurance before destruction, thousand cycles||42||>50|
|Creep at 160°C for 24 h (at 30 g/mm2mm)||119||53|
|The elastic rebound after thermal aging at 180°C for 24 h, %|
As follows from the above data, the rubber mixture according to the invention has high strength properties, resistance to heat aging, reduced creep and low osmolality.
The rubber mixture for the production of diaphragms of shaper-vulcanizers, comprising Butik ucuk,
chloroprene rubber and chlorinated ethylene-propylene-diene-filled rubber obtained by mixing the ethylene-propylene-diene rubber and a chlorinated hydrocarbon with the General formula Cn·H(2n+2)-xClxwhere n=10-30, x=7-24 at a temperature of 80-150°C in the presence of colloidal silicon dioxide is introduced into the mixture during mixing, as well as the rubber mixture contains per 100 parts by weight of a mixture of rubber stearic acid, zinc oxide, carbon black, mineral oil "stabilis" and phenol-formaldehyde resin "amberol 137" in the following ratio of components, rubber compounds, parts by weight:
|the above chlorine|
|mineral oil "stabilis"||3-8|
|resin phenol-formaldehyde "amberol 137"||5-10|
SUBSTANCE: claimed invention relates to phenol formaldehyde binders and composition materials based thereon, intended for manufacturing of fire-safe parts of interior of passenger airplanes, in ship and automobile building and railway transport. Claimed are phenol formaldehyde binder, including, weight fraction: resole phenol formaldehyde resin, i.e. a highly concentrated product of condesation of phenol and paraformaldehyde 100, phenol-formaldehyde novolac 33-100, organic solvent acetone 33-130; prepreg, including, weight fraction: the said binder 20-80, glass fabric 28-48, and a product obtained by formation of the aforesaid prepreg. When using claimed phenol formaldehyde binder in combination with glass re-enforcing filler, complex of materials can be obtained i.e. prepreg with viability increased to 3 months, glass textolite and three-layer cell panel on their basis with ca. fourfold reduced heat-generation when burning.
EFFECT: invention allows creating prepreg with viability increased to 3 months, glass textolite with ca. fourfold reduced heat-generation when burning, using phenol formaldehyde binder.
3 cl, 4 ex, 4 tbl
SUBSTANCE: invention relates to powder metallurgy, namely to metal-polymeric compositions for obtaining cast iron bars. Metal-polymeric composition is obtained by mechanical mixing of two mixtures - as component of the first high-dispersion powders of iron and, probably, at least, one alloying element is used, as components of the second - thermo-reactive phenol-formaldehyde resin, plastificator and iron oxide powder are used, as plastificator salt of stearine acid is used, with the following ratio of components mass %: - thermoreactive phenolformaldehyde resin -15-20; -salt of stearine acid -0.4-1.5; -iron oxide (III) -0.2-32; -iron powder - the remaining part. As alloying element in the first mixture high-dispersion powder of nickel, chrome, copper, molybdenum, manganese, aliminium, titanium, vanadium, silicon is used.
EFFECT: reduction of technological cycle of manufacturing of cast iron products and expanding their range.
2 cl, 2 tbl, 2 ex
SUBSTANCE: composition is used for making hollow micro-spheres, which are used as a component of boring solutions when finding and producing oil, as low density filler in various composite materials, used in machine building, aviation and ship building, space technology, and when making heat insulation materials. The composition contains the following, in the given mass ratios: resol phenol-formaldehyde resin with relative viscosity of 5000-9000 cP - 100, porofor (5), polyether based on ethylene oxide copolymer and propylene oxide with molecular mass of 4000-6000 (2-3).
EFFECT: higher space factor of the boring solution micro-spheres, improved looseness of the micro-spheres, increased strength during hydrostatic compression.
1 tbl, 3 ex
SUBSTANCE: invention concerns non-inflammable polymeric compositions applied in local strengthening of constructions, including three-layer cell panels, in the zones of fastener fixation, ends sealing and cavity filling in polymeric composite parts used in land, marine or air transport. The composition includes, mass parts: resol phenol-formaldehyde resin 100, hollow microspheres 54-135, aluminium oxide hydrate 120-200. High-concentration product of phenol and paraformaldehyde condensation with at least 10% content of water and 86% content of non-volatiles is used as resol phenol-formaldehyde resin. Hollow microspheres are made of glass or ash or polymers.
EFFECT: production of self-extinguishing less-fuming composition with adjustable viscosity; improved spread life of the composition and lower heat generation while burning.
2 cl, 2 tbl, 4 ex
FIELD: storage of resol phenol-formaldehyde resin.
SUBSTANCE: method includes introduction of stabilising adder - hydrazine hydrate - in phenol-formaldehyde resin. Selection of hydrazine hydrate as stabilising adder is conditioned by its efficiency, availability and relatively low cost.
EFFECT: increase of phenol-formaldehyde resin stability.
3 tbl, 2 ex
FIELD: chemistry of polymers, chemical technology.
SUBSTANCE: composition for preparing foam plastic comprises the following components, mas. p. p.: soluble phenol-formaldehyde resin (novolacs), 20-40; phenol (resol) resin, 60-80; nitrile rubber, 20-40; blowing agent, 3-7; foam regulating agent, 1-20. As a foam regulator, products of processing alkylphenols with ethylene oxide can be used. Composition can comprise sulfur in the amount 0.2-0.5 mas. p. Invention provides preparing heat-stable, impact-strength foam materials not causing corrosion of nonferrous metals (copper, silver and their alloys) in direct contact and showing working capacity up to temperature 150°C. These materials can be used as heat-stable, vibration-proof materials in radiotechnical articles and articles having electric contacts made of nonferrous metals and alloys.
EFFECT: improved and valuable properties of composition.
3 cl, 2 tbl, 3 ex
FIELD: chemistry of polymers.
SUBSTANCE: invention relates to a polymeric binding agent for composition materials used as structural materials in machine engineering, aircraft construction and instrument making. Binding agent comprises the following ratio of components, mas. p. p.: epoxy resin ED-20, 50-60; phenolformaldehyde resin RFN-60, 40-50, and additive, 6-7. Mixture of triethanolamine (6 mas. p.) and salicylal-5-methoxy-8-aminoquinoline (0.5 mas. p.) is used as an additive. Invention provides decreasing hardening time, to enhance bending strength and reduce the friction coefficient of the proposed composition material.
EFFECT: improved and valuable technical properties of material.
2 tbl, 3 ex
FIELD: metal-polymer composition for making steel blanks prepared by mechanically mixing two mixtures.
SUBSTANCE: one of mixtures used for preparing composition contains finely dispersed powders at least of one alloy element, iron and iron oxide, mass %. Second mixture contains thermosetting phenol formaldehyde resin, 8 - 15 mass %; and plasticizing agent being stearic acid salt, at next relation of ingredients, mass %: thermosetting phenol formaldehyde resin, 8 - 15; stearic acid salt, 0.4 - 1.5; iron oxide, 8 - 40; mixture of alloying powders and iron, the balance. First mixture may contain as alloying element finely divided powder of nickel, chrome, copper, molybdenum, manganese, aluminum, titanium, vanadium.
EFFECT: enlarged assortment of metal-polymer compositions used for making steel blanks due to processing compositions by molding and sintering during shortened cycle.
2 cl, 2 tbl, 4 ex
FIELD: polymer production and waste water treatment.
SUBSTANCE: invention relates to processes for treating phenol-formaldehyde resin production waste water, which results in preparation of pressed materials. Process of preparing press composition comprises mixing ammonia-tar liquor from phenol-formaldehyde resin production with preliminarily ground adsorbent, which is mixture of ground vegetable-origin filler and glass plastic crumb based on thermoset polymeric material at weight ratio (3-5):1; performing polycondensation process on heating with ammonium hydroxide added; after which sodium hydroxide solution and formaldehyde solution are added in at least two steps and resulting product is dried. Components are mixed at initial liquid phase-to-adsorbent ratio (2.8-3.5):1 and formaldehyde is introduced in the form of aqueous solution until final phenol-to-formaldehyde molar ratio no less than 1:2.
EFFECT: achieved utilization of ammonia-tar liquor and simultaneously obtained press composition showing high physicochemical characteristics.
6 cl, 1 tbl, 4 ex
FIELD: chemistry of polymers.
SUBSTANCE: invention relates to filled polymeric compositions designated for making large-scaled articles of antifriction profile. Antifriction composition comprises carbon fabric with fiber of average size of crystallites by basic plane 3.0-6.0 nm and package thickness of basic planes 1.0-4.0 nm. Composition comprises the following ratio of components, wt.-%: carbon fabric, 35-50; phenolformaldehyde binding agent, 35-50; oleic acid, 1.5-5; tin or tin babbit alloy powders, 5-10. Invention provides reducing friction coefficient of antifriction composition in water and retaining high strength and wear resistance in working under control by controlling bodies of different hardness.
EFFECT: improved and valuable properties of composition.
3 cl, 1 tbl, 8 ex
SUBSTANCE: invention relates to rubber industry, particularly to production of tyres and other rubber technical products. Rubber mixture contains mixture of caoutchoucs, wt.p - isoprene 40-60, butadiene - 25-40 and chlorine-containing ethylene-propylene-diene filled caoutchouc - 15-25. Chlorine-containing ethylene-propylene-diene caoutchouc is obtained by mixing of ethylene-propylene-diene caoutchouc and chlorine- containing hydrocarbon in presence of colloidal silicon dioxide. Rubber mixture also contains sulfur - 1-2, sulfenamide accelerator - 0.5-1.0, zinc oxide - 5-10, technical carbon - 40-60, colophony - 1-3, mineral oil - 5-10, sterol-indene resin - 2-8 and antiscorching agent - santogard PVJ-0.2-1.0 taken per 100 wt.p of caoutchouc mixture.
EFFECT: obtaining tyres which have increased resistance to ozone and thermal aging, as well as increased strength qualities at tension and elongation.
2 tbl, 1 ex
SUBSTANCE: invention refers to elastic composition for many practices, including manufacturing tyre tracks and tyre casing side plates, tyre pillows, tank liners, hoses, rollers, conveyor belts, rubber tubes, gas masks, etc. Elastic composition contains, at least, one halogenated butyl elastomer and, at least, one mineral additive with a surface modified by, at least, one organic compound, containing, at least, one hydroxyl group and one base group including nitrogen atom and chosen of protein and amino alcohol group. Tyre casing tracks made of this composition are characterised with improved mechanical properties, e.g., tensile strength, abrasion resistance, i.e. wear resistance, as well as low rolling resistance and good force transfer especially while wet.
EFFECT: production of composition for tyre tracks improving mechanical properties of the material, ensuring low rolling resistance and good force transfer especially while wet.
6 cl, 6 tbl, 6 ex, 9 dwg
SUBSTANCE: invention relates to elastomeric composition, which includes, at least, one halogenated butyl elastomer, at least, one filler and, at least, one organic compound, as organic compound it contains compound, containing, at least, one hydroxyl group and one containing nitrogen atom base group, representing aminoalcohol with nitrogen layer from 0.1 to 5 fractions per a hundred elastomer fractions, and in addition to containing, at least, one hydrated metal halogenide, with definite ratio of separate ingredients (in weight faction). Invention also relates to method of obtaining elastomeric product by mixing components of said elastomeric composition with further vulcanisation of formed mixture, as well as to protector or insert of automobile tyre, produced from elastomeric product, manufactured by claimed method. Claimed elastomeric composition can be applied in many fields of practical application, including using it for manufacturing protectors and side walls of tyres, tyre inserts, reservoir coating, hoses, rollers, conveyor belts, rubber tubes, gas masks, etc. Tyre protectors made from such composition possess enhanced resistance to abrasive attriction, that is, are wear-resistant, and thermal stability, as well as low resistance to rolling, and pass force well, especially in wet state.
EFFECT: ensuring resistance to abrasive attriction, thermal stability and low resistance to protector rolling.
12 cl, 2 tbl, 2 ex, 3 dwg
SUBSTANCE: invention pertains to thermoplastic compositions, which have better mechanical properties and permanent strength and to a pneumatic tyre, containing such a composition. The elastomer composition is a dynamic vulcanised mixture (A) of halogenated isobutylene elastomer component, (B) polyamide component, (C) amine component and common additives. Elastomer (A) is dispersed in form of a domain in a continuous phase of polyamide (B). Amine component (C) is chosen from a group consisting of secondary diamines and a mixture of the given secondary diamines and tertiary amines. The amine component is taken in a quantity such that, viscosity of the isobutylene elastomer in conjunction with the amine component is the same as the viscosity of the polyamide component during dynamic vulcanisation.
EFFECT: improved impermeability of the thermoplastic elastomer composition, its mechanical properties at low temperature and permanent strength.
3 cl, 7 tbl, 15 ex
SUBSTANCE: invention pertains to compositions of ternary copolymers on an isobutylene base and can be used in tyres, in particular in motor car components, such as protectors, inner lining of tyres, air bladders and tubes. The vulcanised elastomer composition contains halogenated ternary copolymer links from C4 to C8 derived from iso-olefin, links from C4 to C14 derived from multi-olefin and links derived from p-alkylstyrol. The composition is vulcanised in the presence of a sulphur vulcanising group. The value of adhesion to butadiene-styrene rubber of the vulcanising composition at 100°C is more than 70 N/mm. The composition also optionally contains filler and/or extra rubber. The suitable fillers are modified carbon black, carbon black, silicon dioxide, aluminium oxide, calcium carbonate, clay, mica, talc, titanium dioxide, starch, wood powder and their combination.
EFFECT: improved adhesion to the frame, elasticity with retention of impermeability to air.
52 cl, 1 dwg, 8 tbl
FIELD: transportation; chemistry.
SUBSTANCE: invention relates to to elastomer composition containing at least one halogenated butyl elastomer, at least one mineral filler and at least one compound containing silicon. Note that the composition contains a mix of at least one silazane compound as the silicon-containing compound and at least one agent containing at least one amino alcohols. The invention also relates to the method of making an elastomer product by mixing the components of the given elastomer composition with the subsequent vulcanisation of the mix formed, and to the tread or the car tyre insert from the elastomer product thus produced. This elastomer composition may be used in many industrial branches, including the production of treads and its side walls, tyre inserts, covering of various vessels, hoses, conveyor belts, rubber tubes etc.
EFFECT: improved mechanical properties of tyres, higher anti-abrasion properties and lower rolling friction.
13 cl, 10 tbl, 5 ex, 11 dwg
SUBSTANCE: invention refers to size control method for disperse particles in thermoplastic elastomer composition. Disperse particle size control method includes mixing in melt of the following: (A) halogenated isobutylene elastomer, (B) polyamide, (C) dispersion supplement, and (D) traditional additives. Resulting mixture is subjected to dynamic vulcanization thus forming dynamically vulcanized resin mix; halogenated isobutylene elastomer is dispersed in polyamide matrix at volume-averaged diameter of dispersion particles Dv from 0.01 to 2.5 μm.
EFFECT: thermoplastic elastomer composition with controllable size of disperse elastomer particles and improved durability and impermeability.
8 cl, 2 dwg, 3 tbl, 13 exrsid7429359
FIELD: polymer materials.
SUBSTANCE: thermoplastic elastomer composition contains dynamically vulcanized mixture of partially vulcanized halogenated isobutylene elastomer, polyamide, and conventionally utilized additives, wherein stretching elasticity modulus at 100% elongation for elastomer distributed in polyamide is less than 0.60 MPa and wherein halogenated elastomer is, in particular, brominated or chlorinated one. Preparation of thermoplastic elastomer composition involves dynamic vulcanization of halogenated isobutylene elastomer, polyamide, and conventionally utilized additives at temperature lower than 185°C.
EFFECT: improved durability and flexibility of composition.
11 cl, 2 tbl, 2 ex
FIELD: rubber compositions, chemical technology.
SUBSTANCE: invention relates to rubber mixture compositions and methods for their preparing. Preparing a rubber mixture composition involves mixing from 5 to 90 wt.-% of rubber component chosen from butyl rubber, halogenated butyl rubber, stellate butyl rubber, halogenated stellate butyl rubber, isobutylene homopolymer, chloroprene, butadiene-nitrile rubbers, ethylene-propylene-diene triple copolymers, ethylene-propylene copolymers, butadiene styrene rubbers, polybutadiene, polyisoprene, isoolefin-alkylstyrene copolymer, halogenated isoolefin-alkylstyrene copolymer, natural rubber, polypropylene, polyethylene, polyurethane, polyvinyl chloride, silicon rubber, propylene oxide polymer and their mixtures, from 0.01 to 5 wt.-% of amine compound represented by the formula: (R1R2R3)N wherein R1 means either hydrogen atom or hydrocarbyl group comprising from C4 to C30 carbon atoms; R2 means either hydrogen atom or hydrocarbyl group comprising from C1 to C30 carbon atoms, and R3 means either hydrogen atom or hydrocarbyl group comprising from C1 to C30 carbon atoms under condition that at least one radical among R1, R2 and R3 doesn't mean hydrogen atom, from 5 to 90 wt.-% of isoolefin copolymer comprising a link derivatized from halogenmethylstyrene, isoolefin link comprising from 4 to 7 carbon atoms, and copolymer comprises from 0.5 to 20 wt.-% of halogenmethylstyrene links and usual additives. Invention provides preparing the rubber mixture composition possessing the enhanced strength before treatment and enhanced stability against heat aging after vulcanization.
EFFECT: improved preparing method, improved and valuable properties of composition.
51 cl, 4 tbl, 3 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to thermoplastic elastomer composition for manufacturing products such as films, which composition contains dynamically curable mixture of (A) halogenated isobutylene/p-methylstyrene copolymer, (B) polyamide, and (C) antioxidant having melting point above 70°C and below 200°C, granulated elastomer (A) obtained by granulation in presence of antioxidant (C) as granulator being dispersed as a domain in the continuous phase of polyamide (B) and composition containing (A) and (B) components being dynamically cured. Thus obtained film is characterized by better stretching than film made from composition containing curing agent as granulator and by excellent durability and stability at low temperature as compared to film made from talc-containing composition.
EFFECT: increased durability, heat resistance, elasticity and air impermeability.
7 cl, 3 tbl, 5 ex
FIELD: personal use articles.
SUBSTANCE: invention refers to rubber composition, to forming method of protective items made of this composition, to protective items of complex shape and to protective glove, made of rubber composition by press vulcanisation method. The composition is based on ethylene-propylene-diene caoutchouc mixture skept 40 and butyl rubber bk 1675 taken at equal rate. For fire-resistance qualities the composition contains antimony oxide mixed with chlorinated paraffin 470 and 1100.
EFFECT: produced goods have high mechanical qualities in combination with chemical and fire resistance to it to be used in extreme conditions influenced by aggressive environment, toxic chemical and propellant components.
5 cl, 2 tbl