Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain and compositions of derivatives of such polymers (C08L77)

C   Chemistry; metallurgy(318327)
C08L77                 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides c08l0079060000; of polyamide-imides or polyamide acids c08l0079080000); compositions of derivatives of such polymers(418)
Fluorinated polyamide composition with reduced combustibility // 2641931
FIELD: chemistry.SUBSTANCE: invention relates to low combustibility composite materials including a polyamide base and flame retardant, and can be used to produce moulded articles such as yarns, films and sheets, as well as cast-in-place moulds. The fluorine-containing polyamide composition with reduced flammability includes polyamide PA-6 and flame retardant. The flame retardant is montmorillonite represented by a mixture of two main fractions: 50-100 nm -10 wt %, less than 1 mcm - 80 wt %, less than 10 mcm - 10 wt % with a mixture of polyfluorinated alcohols adsorbed in an ultrasound field thereon. A mixture of polyfluorinated alcohols consists of 1,1,3-trihydroperfluoropropanol-1, 1,1,5-trihydroperfluoropentanol-1 and 1,1,7-trihydroperfluoroheptanol-1.EFFECT: increased duration of thermal protection effectiveness of the polyamide composition.2 ex
Texstolite of multifunctional purpose // 2641125
FIELD: textile, paper.SUBSTANCE: texstolite is made of heat-treated woven semi-finished product containing reinforcing heat-resistant filler in the form of polyoxadiazole yarn or threads and thermoplastic binder in the form of continuous polyamide complex threads. The filler and binder are stranded twist 150-250 tw./m in combined thread linear of density of 58.0-100.0 tex when their ratio is (0.85-1.18) (0.84-1.16) and the ratio of densities of the woven semi-finished product on the basis of equal and duck 1:(0.5-0.8).EFFECT: reduction in porosity and giving noise, vibration, sound and antifriction properties.3 cl, 2 tbl, 2 ex

Composite materials from thermo-reactive resin containing inter-layer particles increasing strength // 2641004
FIELD: chemistry.SUBSTANCE: resin system comprises the following components: (i) a thermosetting resin comprising, at least, one tri-functional epoxy resin and, at least, one four-functional epoxy resin, (ii) thermoplastic polyamide particles having a melting temperature TPA; and (iii) one or more curing agents. The resin system does not contain epoxy resin with a functionality of less than three. The starting components of the resin system are selected so that the thickening of the epoxy matrix during the curing cycle of the resin system occurs at a thickening temperature TGEL at or below TPA. The resin system is cured at a temperature TC in the range of 170 to 190°C, and all thermoplastic particles have a melting temperature TPA not higher than curing temperature TC. The method of producing a composite material is to provide a resin system and combine it with reinforcing fibres. The system is then cured at a temperature in the range of 170 to 190°C at a rate of change of hardening RCR in the range of 0.05 to 3.0°C/min.EFFECT: invention makes it possible to produce a composite material containing thermoplastic particles that increase impact resistance, and having improved compression characteristics under conditions of elevated temperature and humidity, and to reduce or eliminate the formation of microcracks during curing.14 cl, 8 dwg, 7 tbl, 4 ex
Fluorine-containing polyamide composition with reduced combustibility // 2637955
FIELD: chemistry.SUBSTANCE: composition includes PA-6 polyamide and a mixture of flame retardants consisting of antimony tris (1,1,7-trihydroperfluoroheptoxide) and mixtures of 1,1,3-trihydroperfluoropropanol-1, 1,1,5-trihydroperfluoropentanol-1 and 1,1,7-trihydroperfluoroheptanol-1, pre-adsorbed on montmorillonite, at a certain ratio of components.EFFECT: increasing the duration of thermal protection effectiveness of composites.3 ex
Polyamide compounds with improved optical properties // 2637556
FIELD: chemistry.SUBSTANCE: polymer composition comprises, at least, one polyamide and, at least, one compound of the formula , in which x is 1, 2 or 3; R1 and R2are independently selected from hydrogen, linear C1-C7-alkyl, branched C3-C10-alkyl, unsubstituted or substituted C3-C12-cycloalkyl, unsubstituted or substituted C3-C12cycloalkyl-C1-C4-alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C1-C4-alkyl; and Z is trans 1,4-cyclohexanediyl. The use of a compound of formula I in a polymer composition for improving, at least, one optical property selected from increased transparency, increased laser transparency and reduced turbidity, and a moulded article produced from the said composition are also described.EFFECT: providing improved optical properties selected from reduced turbidity, improved transparency and improved laser transparency in polyamide compositions using the compound of formula I.23 cl, 23 tbl, 17 ex

Hybrid component based on metal and plastic // 2636720
FIELD: chemistry.SUBSTANCE: inherent property of the polymer composition is that it contains from 50 to 99.7 wt % of, at least, one polymer selected from polyamides, mixtures thereof, and polyaryl ether ketones, and from 0.3 to 20 wt % of one or more silicone-containing additives enhancing the adhesion. The invention further relates to the hybrid components based on plastic and metal and their preparation.EFFECT: products obtained from the compositions have improved physico-mechanical characteristics.15 cl, 3 dwg, 6 tbl

ethod of obtaining dynamically volcanized alloys // 2635610
FIELD: technological processes.SUBSTANCE: alloy includes at least one elastomer and at least one thermoplastic resin. According to the method, the thermoplastic resin is added to the extruder in two stages with the intermediate addition of a compatibilizing agent. In addition, vulcanizers of elastomers are added to the extruder during the final addition of the thermoplastic resin.EFFECT: invention allows to obtain dynamically vulcanized alloys with unique morphological properties, which are characterized by good impermeability and low-temperature elasticity.19 cl, 3 dwg, 9 tbl
Fire-resistant polyamides with light colour // 2632010
FIELD: chemistry.SUBSTANCE: invention relates to the thermoplastic moulding compositions, its use in the manufacture of fibers, films, moulded products, such as fibers, films, moulding products, as well as to the use of salt or copper (I) or silver (I) oxide, or its mixtures to produce moulding compositions or the indicated moulded products, imparting the certain properties to them, for example, the increased resistance to ultraviolet light, reduced by the phosphine formation, having less intense reddish colour tone, etc. The thermoplastic moulding compositions contains A) from 10 to 99.8 wt % of the thermoplastic polyamide, B) from 0.1 to 60 wt % of red phosphorus, C) from 0.01 to 4 wt % of the salt, the oxide or complex of the copper (I) or silver (I) or mixtures of these substances, D) from 0 to 40 wt % of the impact strength modifier, E) from 0 to 60 wt % of other additives. The weight percentages sum of the components A)-E) is 100%.EFFECT: invention makes it possible to produce moulding compositions, based on thermoplastic polyamide with red phosphorus, as the flame retardant, characterized by the slight reddish own colour, improved colourability in light and gray tones, the increased resistance to the ultraviolet light and low propensity to form the phosphine.15 cl, 3 tbl
Polyamide composition to manufacture moulded products with improved surface quality and method of its production (its versions) // 2632008
FIELD: chemistry.SUBSTANCE: polyamide composition contains the following components (wt %): a) 40-99.55 polyamide, b) from 0.15 to 10 electrically conductive carbon, selected from the group of carbon nanotubes and graphene, c) from 0.3 to 8 the oligofunctional compound, that contains at least one functional group, that is capable to react with the reactive groups on the carbon surface, and also optionally at least one functional group, that can react with the terminal group of the polyamide, d) up to 59.55 of final additives. The functional groups are selected from the oxazinone and oxazoline groups.EFFECT: improved dispersion of carbon nanotubes, graphene and, accordingly, improved electrical conductivity.7 cl, 5 tbl, 5 ex
oulded polyamides, method of their production and their application // 2631324
FIELD: chemistry.SUBSTANCE: method for producing a moulded polyamide consists in that, at least, one lactam melt with an anionic polymerization catalyst and optionally a tertiary amine co-activator and/or dibutyltin dilaurate is mixed with, at least, one lactam melt with a biuret polymerization activator or uretdione, and, if necessary, the aforementioned co-activator. The polymerization is then carried out in a mould at a temperature of, at least, 80°C to 130°C, preferably of 110°C to 130°C. Herewith the co-activator must be contained in, at least, one of the lactam melts. If necessary, a lactam melt with a co-activator can be introduced before polymerization. The moulded polyamide is used to make rollers, preferably for passenger elevators, and preforms, preferably containers, gears, tubes, rods and plates for engineering and the automotive industry.EFFECT: invention makes it possible to produce polyamides with a short holding time produced at low temperatures, as well as to produce moulded parts with improved characteristics.7 cl, 1 tbl, 1 ex
olded articles made of polyamide resin // 2628072
FIELD: chemistry.SUBSTANCE: polyamide resin includes diamine structural link and structural link of dicarboxylic acid. Diamine structural links are formed by m-xylylenediamine, p-xylylenediamine or their mixture. Structural units of dicarboxylic acid are formed by sebacic acid. The molded article has a crystallinity index of 0 to 50%, and a moisture content in the range of 0.1 to 2 wt %. The method of producing the molded article is that the above polyamide resin is molded.EFFECT: invention allows to increase the modulus of elasticity of molded articles, while the molded articles do not lose their mechanical strength during prolonged use.8 cl, 3 tbl, 20 ex
Cold curing epoxide composition // 2623774
FIELD: chemistry.SUBSTANCE: epoxy-dian resin composition comprises a plasticizing agent selected from the group consisting of aliphatic diglycidyl ether diethylene glycol, diglycidyl ether of 1.4-butanediol and dibutyl phthalate, a curing system that includes triethylenetetramine and a mixture of aromatic amines XT-450/2 or polyamide resin.EFFECT: high technological viability of the composition, high physical and mechanical characteristics.2 cl, 3 tbl, 10 ex
Composition based on polyester resin, process for its preparation and moulding product using such compositions // 2623261
FIELD: chemistry.SUBSTANCE: mentioned composition based on the polyester comprises a resin component comprising from 80 to 98 wt % of polyester resin (A) consisting of units of an aromatic dicarboxylic acid and units of a diol, and from 20 to 2 wt % of the polyamide resin (B) consisting of links of diamine and dicarboxylic acid, the diamine units comprise 70 mol % or more of m-xylylenediamine units and a dicarboxylic acid units comprise 70 mol % or more units of α, ω-aliphatic dicarboxylic acid and from 0.005 to 0.05 by weight certain parts epoxy resin (C) containing styrene units represented by formula (c1), and glycidyl (meth) acrylate units represented by formula (c2) based on 100 parts by weight resin component. Shaped articles derived from mentioned composition, used in particular as packaging materials such as films, sheets, hollow containers.EFFECT: obtain products with excellent gas tightness and high transparency.10 cl, 3 tbl, 4 ex

Polyamide threads for clothing textiles and fabrics and items of clothes made of them // 2623219
FIELD: textile, paper.SUBSTANCE: thread is made from polyamide containing nylon and polyether diamine which has an average molecular weight of at least 1500 and an equivalent weight per one atomic hydrogen atom (AHEW), less than 10 percent greater than the idealized AHEW value for simple polyether diamine, wherein the amount of active amine hydrogen atoms per molecule and, thus, the AHEW value is calculated by determining the nitrogen content of the amine groups using the procedure described in the document ISO 9702. Clothing fabrics contains the abovementioned thread. The garment comprises a clothing fabric and represents a integral knitted garment or hosiery. The method of thread manufacturing lies in the fact that the melt of the abovementioned polyamide is extruded through a drain bushing containing capillary holes, and filaments are formed from the filaments coming out of the drain bushing.EFFECT: invention provides a polyamide and thread which have a high residual moisture.44 cl, 8 dwg, 4 tbl
Vulcanized rubber mixture for manufacture of light rubber // 2620060
FIELD: chemistry.SUBSTANCE: vulcanized rubber compound for the manufacture of light rubbers contains, in parts: SKY-3 rubber 100.0; sulfur 1.0; diphenylguanidine 3.0; altaks 0.60; zinc oxide 5.0; stearic acid 1.0; complex antioxidant 1.0-2.0. The complex antioxidant includes, wt %: 2.2-methylenebis(4-methyl-6-t-butylphenol) 44.00-36.00; ε-caprolactam 43.00-35.00; zinc oxide 5.00-4.50; salicylic acid 16.50-15.50.EFFECT: invention makes it possible to obtain bright vulcanizates that have a long-term resistance to thermal and oxidative aging.3 tbl
Vulcanized rubber mixture for manufacture of light rubber // 2620059
FIELD: chemistry.SUBSTANCE: vulcanized rubber composition for making light rubbers comprises the following components by wt h: 100.0 natural rubber; sulfur 2.50; diphenyl 0.37; kaptaks 0.48; zinc oxide 55.0; titanium white 55.0; stearic acid 1.0; ultramarine 0.073; phthalic anhydride 0.50; protective wax YaV 1 1.80-2.10; comprehensive antioxidant 1.0-2.0. The complex antioxidant includes, wt %: 2.2-methylenebis(4-methyl-6-t-butylphenol) 44.00-36.00; ε-caprolactam 43.00-35.00; zinc oxide 5.00-4.50; salicylic acid 16.50-15.50.EFFECT: invention makes it possible to obtain bright vulcanizates that have a long-term resistance to thermal and oxidative aging.3 tbl
ethod for producing glass-filled polyamide composition and glass-filled polyamide composition // 2618255
FIELD: chemistry.SUBSTANCE: method of obtaining glass-filled polyamide composition by extrusive combination of polyamide, stabiliser, chopped glass fiber and process lubricant at a temperature higher than polyamide melting point is described, followed by cooling and granulating the obtained composition, in which chopped glass fiber is introduced into polyamide melt in a zone, providing the length of extrusive combination of composition components from 2 to 16 diameters of extruder screw with the following component ratio wt. %: fiberglass 20.0-55.0; process lubricant 0.05-1.00; stabiliser 0.02-1.00; aliphatic polyamide - the rest is up to 100%. A glass-filled polyamide composition is also described.EFFECT: glass-filled polyamide composition with increased fatigue endurance and strength level was obtained.4 cl, 2 tbl, 10 ex
Process for continuous production of halogen-free thermoplastic elastomer compositions // 2614277
FIELD: chemistry.SUBSTANCE: invention relates to thermoplastic elastomer compositions and methods for continuous production of said compositions. continuous method for production of dynamically cured thermoplastic elastomer comprises mixing at first stage of a mixing device of continuous action a thermoplastic resin, a halogen-free elastomer, with polyolefin content of more than 3.5 mol%, which is modified with unsaturated carboxyl compound, and a curing agent. At second stage a curing system is added, which is suitable for use with halogen-free elastomer for dynamic vulcanisation.EFFECT: invention enables to obtain materials with improved relative elongation at break and ultimate tensile strength.15 cl, 2 tbl
New compositions for molded polyamides producing // 2608725
FIELD: technological processes.SUBSTANCE: invention relates to versions of composition for producing molded polyamides, to cured lactam melt, to injection polyamide and method for production thereof, as well as to use of one or more composition components. Composition for molded polyamides producing contains following components: a) hardened lactam melt, including from 0.1 to 5 wt% of, at least one polymer carbodiimide and/or at least one uretdione as activator, and b) hardened lactam melt, including from 0.2 to 5 wt% of catalyst such as magnesium lactam-halide, alkali metal aluminodilactam, alkali and/or alkali-earth metal lactam, and/or component c) hardened lactam melt, including simultaneously from 0.2 to 5 wt% of said catalyst and from 0.1 to 5 wt% of said activator. Hardened lactam melt is obtained by mixing melt consisting of caprolactam and 0.1–5 wt% of said activator, with melt consisting of caprolactam and 0.2–5 wt% of said catalyst at temperature from 70 to 120 °C during period of time from 1 to 60 seconds. One or more said composition components are used for production of cast polyamides. Method of cast polyamides producing involves, that performing polymerization of one or several hardened lactams in injection mold at temperature from 100 to 160 °C.EFFECT: invention allows to increase compositions storage life and produce polyamide with homogeneous structure.14 cl, 2 tbl, 14 ex

Thermoplastic elastomer compositions // 2600447
FIELD: chemistry.SUBSTANCE: invention relates to dynamically vulcanised alloy for making tyres and other industrial rubber articles. Alloy includes at least one elastomer containing isobutylene and at least one thermoplastic resin. At that, elastomer is contained in form of small-size particles phase, dispersed in continuous phase of thermosetting resin. Elastomer in alloy is cured by vulcanising system, which contains 1.0-10 phr of metal oxide and not more than 0.1 phr of any vulcanisation accelerators. At temperature of vulcanisation, located in range of 200-270 °C, elastomer has stepped profile curing, at first curing decelerated until degree of vulcanisation, equal to 10 %, and degree of vulcanisation, equal to 90 %, for time equal to less than 15 minutes. Present invention relates to thermoplastic elastomer composition with improved characteristics compared to previously existing similar compositions.EFFECT: disclosed alloy is stable and its characteristics do not change during operation or processing of thermoplastic elastomer at temperature above temperature of curing or during time of thermoplastic elastomer vulcanisation.12 cl, 3 dwg, 3 tbl

Flexible composition based on polyaromatic polyamide, technology of producing same and use thereof // 2599754
FIELD: chemistry.SUBSTANCE: invention relates to a composition for making articles containing, wt%: from 33 to 40 at least one cross-linked polyolefin, where polyolefin is obtained from at least one product (A) containing unsaturated epoxide, and at least one product (B), including unsaturated carboxylic acid anhydride, and from 3 to 10 at least one plasticiser, and remaining part consisting of at least one polyaromatic polyamide. Weight content of (A) and (B), designated as [A | and [B] is such that ratio [B]/[A | ranges from 3 to 14. Described also is a method for preparing composition, as well as use thereof.EFFECT: technical result is providing compositions for making articles having heat resistance, ageing resistance, Charpy impact strength at -40 °C higher than or equal to 7 kJ/m, modulus of elasticity in flexure less than 800 MPa, combined with uniform or smooth appearance of surface.39 cl, 2 tbl, 1 ex

Thermoplastic elastomeric composition and preparation method thereof // 2599638
FIELD: technological processes.SUBSTANCE: invention relates to dynamically vulcanised alloys (DVA) and, in particular, to DVA, having improved processing characteristics and stability. Present invention also relates to methods of producing DVA. Disclosed is method of producing thermoplastic elastomer composition, involving: dynamic vulcanisation of isobutylene elastomer component, dispersed in form of domain in continuous phase containing at least one thermoplastic resin, to produce post vulcanised dynamically cured alloy; and mixing of post vulcanised dynamically cured alloy with stabiliser based on low-molecular weight aromatic amine, present in amount larger than or equal to 1.5 wt. parts to obtain thermoplastic elastomer composition. Also invention describes thermoplastic elastomer composition obtained using said method comprising post vulcanised dynamically cured alloy and stabilizer based on low-molecular weight aromatic amine, in amount larger than or equal to 1.5 wt. parts, where post vulcanised dynamically vulcanised alloy contains isobutylene elastomer component, dispersed in form of domain in continuous phase containing at least one thermoplastic resin; and thermoplastic elastomer composition obtained by method including: dynamic vulcanisation of halogenated isobutylene elastomer component, where elastomeric component is mixed with not more than 10 wt. parts of cross-linking agent, dispersed in form of domain in continuous phase containing polyamide, to produce post vulcanised dynamically cured alloy; and mixing post vulcanised dynamically cured alloy with 1.5-10 wt. parts of stabiliser based on low-molecular weight aromatic diamine to produce thermoplastic elastomer composition.EFFECT: obtaining elastomeric compositions having improved UV resistance and process characteristics.18 cl, 8 tbl

Neutralised copolymer crumb and methods of production thereof // 2597365
FIELD: technological processes.SUBSTANCE: invention relates to copolymer crumb, to production of neutralised copolymer chips, to method of making aramid yarn and yarn. Method for production of neutralised copolymer crumb consists in the fact that at first is obtained copolymer crumb copolymerisation of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole and terephthaloyldichloride. Obtained copolymer crumb comprises by-product or admixture in the form of acid. Then copolymer crumb reacts with a base to form a salt of said acid. Reaction is carried out during the period of time sufficient to ensure production of a polymer, having content of titratable acid less than 0.4 mol/kg. Then, at least part of said salt is removed to form particles of neutralised copolymer, having characteristic viscosity not less than 3 dl/g. Method of forming aramid yarn consists in the fact that a copolymer crumb is dissolved in sulphuric acid. Obtained spin solution is spun through a draw plate to obtain one or several elementary threads.EFFECT: invention significantly reduces formation of bubbles and prevents the odor of HCl from occurring in spinning solution, as well as enhances the quality of yarn.19 cl, 1 dwg, 1 tbl, 2 ex

Friction insert of absorbing apparatus of railway and metro car automatic coupler made of composite polymer antifriction material // 2595135
FIELD: machine building.SUBSTANCE: friction insert is H-shaped and is placed between inner friction surface of body of absorbing apparatus and its friction elements in made on cylindrical surface of each mobile friction element slots. Insert friction of absorbing apparatus is made of composite polymer antifriction material based on polyamide, or polypropylene, or polyethylene, or polyvinyl sulphite, or polyimide, or derivatives thereof, containing carbon fibre as fibrous filler or a mixture of carbon fibre and glass fibre, as well as randomly arranged carbon nanotubes in form of single-layer or multi-layer with number of layers from 2 to 70, or inserted one into another rolled into a tube graphite planes with number of layers from 2 to 70, wherein outer diameter of carbon nanotubes is selected from 0.1 to 100 nm, and their length from 1 to 70 mcm, content of glass fibre in its mixture with carbon fibre of fibrous filler of composite polymer antifriction material is selected from 2.58 to 11.5 wt%. Quantitative content of components, wt%: carbon fibre or a mixture of carbon fibre and glass fibre 9.7-42.4, carbon nanotubes - 0.05-0.55, polyamide - balance up to 100 %.EFFECT: reduced time of running-in, higher protection against alternate loads on friction surface of support ring - body of absorbing apparatus, preventing jamming, providing protection against action of longitudinal forces and acceleration of cars at a rate of collision of cars of 10-12 km/h.10 cl, 4 dwg, 2 tbl

Polar soluble compositions absorbing oxygen // 2593453
FIELD: chemistry. SUBSTANCE: invention relates to production of plastic package and is intended for producing bottles and preforms for bottles from a polymer composition. Composition contains a polymer matrix, which is a polyester, selected from a group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers, oxidation catalyst, selected from a group consisting of a transition metal compound, molecules, including N-hydroxy cyclic imide, derivatives and combinations thereof. Composition also contains a copolymer or oligomer, including at least one comonomer containing allyl carbon atoms, and at least one polar fragment. At least one comonomer containing allyl carbon atoms, is butadiene or isoprene. Polar fragment is p-aminobenzamide and is nonreactive capable relative to polyester matrix. Composition can be granulated or a product, such as preform, can be obtained directly therefrom. EFFECT: invention allows to produce transparent (relatively free from turbidity) preforms and bottles with good impermeability for oxygen. 11 cl, 2 dwg, 2 tbl

Structure based on polyethylene // 2592540
FIELD: packaging industry. SUBSTANCE: invention relates to structure based on polyethylene. Structure includes from 60 to 90 wt% polyethylene (A), from 5 to 35 wt% acid-modified polyethylene (B) and from 5 to 35 wt% polyamide (C), containing meta-xylylene groups. Polyamide (C) is dispersed in polyethylene (A) in form of a layer, partially to form a continuous phase, and has relative viscosity of 2.5-4.5. EFFECT: improved barrier properties and strength. 11 cl, 4 dwg, 4 tbl

Highly saturated nitrile rubber composition and cross-linked rubber // 2590552
FIELD: chemistry.SUBSTANCE: invention relates to highly saturated nitrile rubber compositions, as well as cross-linked rubbers obtained from such rubber compositions. Composition comprises highly saturated nitrile rubber (A1) with iodine number equal to or less than 120, containing carboxyl groups, which contains α,β-ethylene unsaturated monomer links, monomer links of monoester α,β-ethylene unsaturated dicarboxylic acid and conjugated diene monomer links, highly saturated nitrile rubber (A2) with iodine number equal to or less than 120, which contains α,β-ethylene unsaturated monomer links, conjugated diene monomer links and optionally monomer links of monoester α,β-ethylene unsaturated dicarboxylic acid, polyamide resin (B) with fusion temperature of 100-300 °C, weight ratio of rubber (A1) and rubber (A2) ranges from 2:98 to 98:2 and ratio of content of polyamide resin (B) relative to total amount of rubber (A1) and rubber (A2) is weight ratio of “total amount of rubber (A1) and rubber (A2) : polyamide resin (B)” and ranges from 95:5 to 50:50. Said composition is cross-linked using a peroxide cross-crosslinking agent.EFFECT: obtained cross-linked rubbers have excellent physical properties, oil resistance, fuel resistance and tensile strength at high temperatures.9 cl, 1 tbl, 5 ex

Compositions, methods and articles produced by compounding polyamides with olefin-maleic anhydride polymers // 2586324
FIELD: chemistry.SUBSTANCE: invention describes compounded polymer comprising (a) polyamide and (b) polymer of an olefin-maleic anhydride obtained by copolymerising maleic anhydride and an olefin selected from group consisting of ethylene, propylene, isobutylene, butene-1, octene, butadiene, styrene, isoprene hexene, dodecene, dodecene-1 and tetradecene; wherein compounded polymer is prepared by compounding polyamide resin and olefin-maleic anhydride, where polymer is an olefin-maleic anhydride has a molar ratio of maleic anhydride to olefin of from 1:10 to 10:1 and wherein polymer is an olefin-maleic anhydride is present in a concentration of from 0.01 to 5.0 %. Also disclosed is a cross-linked polymer compounded, methods of producing a compounded polymer and compounded polyamide article comprising compounded polymer.EFFECT: technical result consists in obtaining a compounded polymer with improved properties and performance characteristics, such as resistance to stretching, impact strength, creep resistance and resistance to degradation due to hydrolysis of antifreeze compound.39 cl, 22 tbl, 5 ex, 1 dwg

Composition consisting of polyaromatic polyamide and cross-linked polyolefin // 2583455
FIELD: chemistry.SUBSTANCE: invention relates to a composition for making articles. Composition contains at least one polyaromatic polyamide and at least one cross-linked polyolefin. Cross-linked polyolefin is obtained from at least one product (A) containing unsaturated epoxide, and at least one product (B) containing unsaturated carboxylic acid anhydride. According to invention, weight content of (A) and (B), designated respectively as [A] and [B], are such that ratio [B]/[A] varies from 3 to 14, preferably from 4 to 9. Invention also describes a method of producing a composition and use thereof for making a single-layer or multilayer structure.EFFECT: technical result is smooth and glossy surface products, in particular, pipes, with very small amount or even complete absence of "adapter saliva".34 cl, 2 tbl, 10 ex
Articles obtained by injection molding, having good barrier properties // 2583264
FIELD: machine building.SUBSTANCE: invention relates to an injection molded multilayer article comprising a layer of a barrier polymer composition comprising (A) 20 to 60 wt.% polyamide polymer, comprising a diamine structural unit, 70 mol.% or more of which is derived from m-xylylenediamine, and a structural unit of dicarboxylic acid, 70 mol.% or more of which is derived from a dicarboxylic acid containing a linear aliphatic α, ω-dicarboxylic C4-C20-acid and an isophthalic acid in a molar ratio of 30:70 to 100: 0; (B) 80 to 40 wt.% of a modified polyolefin. Also disclosed is an obtained by injection molding, comprising (A) 10 to 60 wt.% of said polyamide polymer and (E) 40 to 90 wt.% of a mixed polyolefin, comprising (C) 40 to 90 wt.% polyolefin and ( B) 10 to 60 wt.% of a modified polyolefin, wherein at least part of polyamide polymer (A) is dispersed in a layered state in article, wherein said article is a single-layer container comprising a gas barrier layer.EFFECT: said molded articles have good barrier characteristics.4 cl, 6 tbl, 19 ex

Support ring of absorbing device of railway and metro car automatic coupler made of composite polymer antifriction material based on polyamide // 2581889
FIELD: machine building.SUBSTANCE: support ring of absorbing device for automatic coupling is made of composite polymer antifriction material based on polyamide containing carbon fibre as fibrous filler or its mixture with glass fibre, as well as randomly arranged carbon nanotubes in form of single-layer or multi-layer with number of layers from 2 to 70 or inserted one into another rolled graphite planes with number of layers from 2 to 70. Outer diameter of carbon nanotubes is selected from 0.1 to 100 nm, and their length from 1 to 70 mcm. Content of glass fibre in its mixture with carbon fibre filler of composite polymer antifriction material is selected from 2.58 to 11.5 wt%. Quantitative content of components, wt%: carbon fibre or a mixture of carbon fibre and glass fibre - 9.7-42.4, carbon nanotubes - 0.05-0.55, polyamide - balance up to 100 %.EFFECT: reduced time of running-in, higher protection against alternate loads on friction surface of support ring - housing of absorbing apparatus, preventing jamming, protection against longitudinal forces and acceleration of cars at a rate of collision of cars 10-12 km/h.4 cl, 2 tbl

Polyamide composition // 2579138
FIELD: chemistry.SUBSTANCE: invention relates to polyamide composition, capable of effective absorption of oxygen. Composition contains polyamide compound (A) and transition metal compound (B). Compound (A) contains 25-50 mol % of diamine, which contains diamine, selected from aromatic diamine, represented by formula alicyclic diamine, resented by formula and linear aliphatic diamine, represented by formula in the total quantity not less than 50 mol %; 25-50 mol % of dicarboxylic acid, which contains linear aliphatic dicarboxylic acid, represented by formula and/or aromatic dicarboxylic acid, represented by formula in the total quantity not less than 50 mol %; and 0.1-50 mol % of structural unit, represented by formula wherein m, n is integer number from 2 to 18, Ar is arylene group, R is substituted or non-substituted alkyl or aryl groups.EFFECT: sufficient efficiency of oxygen absorption without deterioration of transparency is provided.11 cl, 8 tbl, 19 ex

asterbatch and method for obtaining polyamide resin composition with masterbatch application // 2573394
FIELD: chemistry.SUBSTANCE: invention relates to masterbatch for polyamide resin composition, used for manufacturing packing material, petrol-impermeable material, fibrous material, materials for hoses, packing bottles, as well as to method for obtaining polyamide resin composition with application of said masterbatch. Masterbatch contains polyamide (X), including diamine unit, consisting by 70 mol % or more of metaxylynediamine unit, and dicarboxylic acid unit, and alkali compound (A). Average diameter of particles of alkali compound (A), contained in masterbatch, equals 50 mcm or less. Number of particles with particle diameter larger than 80 mcm per 5 square millimetres of masterbatch transverse section equals 1.5 particles or less. The sun (m) of values, obtained by multiplication of molar concentration of alkali metal atom and molar concentration of alkali earth metal atom, each contained per 1 g of masterbatch, by valences of said metals, respectively constitutes 60 mcmol/g or higher and 1710 mcmol/g or lower.EFFECT: provision of possibility to obtain polyamide resin composition, which has good outlook, good colour tone and forms fewer gels, when processed by moulding.9 cl, 4 tbl, 18 ex

Polyamide resin composition // 2572983
FIELD: chemistry.SUBSTANCE: invention relates to a polyamide resin composition which contains a polyamide (X), which includes a diamine unit, including 70 mol% or more of a methaxylylene diamine unit, and a dicarboxylic acid unit, including 70 mol% or more of an adipic acid unit or a sebacic acid unit, and an alkaline compound (A), which is at least one compound selected from carbonates, bicarbonates or carboxylates of alkali or alkali-earth metals, where the following equations (1)-(3) are satisfied: 0.03≤P≤0.32 (1), 2.2≤M≤26.1 (2), 9.3<M/P≤186 (3), where P denotes the molar concentration, expressed in mcmol/g, of phosphorus per gram of the polyamide resin composition, M denotes the sum, expressed in mcmol/g, of the values obtained by multiplying the molar concentration of an alkali metal atom and the molar concentration of an alkali-earth metal atom per gram of the polyamide resin composition by the valence thereof, respectively. The invention also describes a method of producing the polyamide resin composition, a polyamide mother batch and a multilayer moulded article.EFFECT: good colour hue of the polyamide resin composition, production of a smaller amount of gel and a burnt residue when making articles from the composition, such as films, sheets, fibres and multilayer articles.11 cl, 10 tbl, 91 ex

Polymer mixture, possessing flowability limit and its application for obtaining metal-polymer composite materials // 2571762
FIELD: chemistry.SUBSTANCE: invention relates to two-phase polymer mixture, containing (a) polyamide, which has melting point not higher than 210°C, (b) polyolefin, modified by grafting carboxyl groups, with rheological properties of mixture in melted condition, being characterised by presence of flowability limit, as well as to method for its obtaining. Invention also relates to application of said polymer mixture for manufacturing composite constructions and envelopes, as well as to composite constructions and enveloped obtained by said method.EFFECT: improvement of connection properties.25 cl, 9 dwg, 2 tbl
Composition, containing polyamide 66 and polyamide, selected from group, consisting of: polyamide 610, polyamide 1010 and polyamide 1012 // 2570461
FIELD: chemistry.SUBSTANCE: invention relates to composition for obtaining products, possessing higher chemical stability and can be applied, in particular, to obtain products, intended for containing or transfer of flowing media. Composition is obtained by mixing 15-60 wt % of polyamide 66, in which content of terminal aminogroups is higher than content of terminal acidic groups with 20-70 wt % of polyamide, selected from the group of polyamide 610, polyamide 1010 and polyamide 1012 and reinforcing or volume fillers. Also described are methods for obtaining composition, method for obtaining plastic products with application of composition and application of composition for obtaining products, possessing higher chemical stability or for increase of chemical stability of products, obtained from composition.EFFECT: better stability to impact of chemical products and good balance of mechanical properties, in particular sufficient impact resistance.9 cl, 2 tbl, 3 ex

Polyamide polymer compositions // 2570453
FIELD: chemistry.SUBSTANCE: composition includes a polyamide polymer (A), containing diamine structural links and dicarboxylic acid structural links, where 70 mol % or more of the diamine structural links are formed from xylylene diamine, and 50 mol % or more of the dicarboxylic acid structural links are formed from sebacic acid, and 1-40 pts.wt of at least one copolyamide (B) per 100 pts.wt of a polyamide polymer (A), where the copolyamide (B) is selected from copolyamide 6/66/12, copolyamide 6/66/11 and a polyether and polyamide copolymer containing a polyamide 12 link or a polyamide 11 link or a polyether link. Polyamide (A) is obtained via polycondensation of a diamine component containing 80 mol % or more of xylylene diamine with a dicarboxylic acid component containing 80 mol % or more of sebacid acid, and has number-average molecular weight of 6000-50000. Also described is a moulded article made from a polyamide composition, which is a film, a sheet or a tube.EFFECT: high modulus of elasticity of the polyamide polymer material, gas impermeability, low water absorption and flexibility.10 cl, 3 tbl, 13 ex

Thermoplastic elastomer composition // 2570045
FIELD: chemistry.SUBSTANCE: invention relates to thermoplastic elastomer composition for sealing layer of pneumatic tyre. Thermoplastic elastomer composition contains (A) 100 wt pt of halogenated copoly(isoolefin-p-alkylstyrene) caoutchouc, (B) from 40 to 120 wt pt of polyamide resin and (C) from 0.5 to 10 wt pt of amine, containing, at least, one hydroxyl group. Amine (C) represents compound, described by formula (1): where R1 represents C1-30alkyl; R2 represents -(C2H4O)n-H, where n represents integer number in the range from 1 to 30; and R3 represents -(C2H4O)m-H, where m represents integer number in the range from 1 to 30, C1-30alkyl or hydrogen.EFFECT: invention makes it possible to improve fatigue life.11 cl, 3 tbl

Composite material for manufacturing substrates and compensators in equipment mounting // 2570027
FIELD: chemistry.SUBSTANCE: polymer composite material is obtained from composition, which contains (wt %) epoxy-diane resin ED-20 - 30, curing agent polyethylenepolyamine PEPA - 5, filler finely disperse dust-like quartz of grade "A" - 52, plasticiser - epoxy aliphatic resin of grade E-181 - 8.EFFECT: invention makes it possible to create polymer composite material for manufacturing substrates and compensators in equipment mounting, exploitation, and provides increase of physical-mechanical characteristics of polymer composite material in its exploitation.1 dwg, 1 tbl

Heat ageing resistant polyamides // 2566148
FIELD: chemistry.SUBSTANCE: invention relates to thermoplastic moulding compositions, containing: A) 10-98 wt % thermoplastic polyamide, B) 0.01-20 wt % highly branched melamine polymer or highly branched melamine-carbamide polymer or mixtures thereof, wherein the degree of branching is 10-99.9%, C) 0-70 wt % additives selected from a group including fibrous or granular filler, lubricants, sterically hindered phenols, nigrosine, iron powder, viscoelastic polymerisates, stabilisers, antioxidants, anti-thermal decomposition agents in UV light, lubricants and lubricants for separation from the mould, dye substances, agents for forming crystallisation centres and plasticisers, C3) 0.05-3 wt % copper-containing stabiliser.EFFECT: invention relates to use of moulding compositions to produce fibres, films and moulded articles; the moulding compositions exhibit improved resistance to heat ageing and a good surface after heat ageing.10 cl, 7 tbl

Heat ageing-resistant polyamides // 2565699
FIELD: chemistry.SUBSTANCE: invention relates to thermoplastic moulding compounds and use thereof to obtain fibres, films and moulded articles. The thermoplastic moulding compounds contain a polyamide, iron powder with maximum particle size of 10 mcm (d50-value), obtained from thermal decomposition of iron pentacarbonyl and having BET specific surface area of 0.1-5 m2/g according to DIN ISO 9277, as well as other additives.EFFECT: invention enables to obtain a moulding compound, having ageing resistance and improved mechanical properties during prolonged storage in heat.13 cl, 12 tbl

Polyamide resin composition // 2565691
FIELD: chemistry.SUBSTANCE: group of inventions relates to a polyamide resin composition, a method for production thereof and a multilayer moulded article used as packaging material. The polyamide resin composition contains a polyamide (X), which includes a diamine link which includes 90 mol % or more of a methaxylylene diamine link, and a dicarboxylic acid link, which includes 70 mol % or more of an adipic acid link or a sebacic acid link, and an alkaline compound (A), which is at least one compound selected from carbonates and carboxylates of alkali metals and alkali-earth metals, where the following equations from (1) to (4) are satisfied: 10≤([COOH]-[NH2])≤80 (1); 0.32≤P<6.46 (2); 0.50≤M<17.00 (3); 2≤M/P≤3 (4). In said equations (1)-(4) [COOH] denotes concentration (mceq/g) of terminal carboxyl groups in the polyamide (X); [NH2] denotes concentration (mceq/g) of terminal amino groups in the polyamide (X); P denotes molar concentration (mcmol/g) of phosphorus atoms contained in one gram of the polyamide resin composition; and M denotes the sum (mcmol/g) of values obtained by multiplying molar concentration of the alkali metal atom and molar concentration of the alkali-earth metal atom (content of each in one gram of the polyamide resin composition) by its valence, respectively. Also described is a method of producing the polyamide resin composition, which includes polycondensation of a diamine and a dicarboxylic acid in the presence of a compound (B), containing a phosphorus atom, to obtain a polyamide (X) and then adding an alkaline compound (A), as well as a multilayer moulded article.EFFECT: providing a polyamide resin composition characterised by good colour hue, which produces less gel-like substance during production and moulding, where a multilayer article made from said polyamide resin contains less burnt residue.10 cl, 7 tbl, 227 ex
Copolymerised polyamide resin, method for production thereof, resin composition and moulded article made from copolymerised polyamide resin or resin composition // 2565069
FIELD: chemistry.SUBSTANCE: invention relates to a copolyamide resin and a method for production thereof, a copolyamide resin composition and to a cast film and a moulded article. The copolyamide resin contains a diamine component which contains two or more diamines, and a dicarboxylic acid component. The diamine component contains 70 mol % or more of xylylenediamine, which contains 20 mol % or more of p-xylylenediamine. The dicarboxylic acid component contains 70 mol % or more of a straight-chain aliphatic dicarboxylic acid with 6-18 carbon atoms. The copolyamide resin contains particles obtained from a polyamide, having an external diameter of 50 mcm or more, in amount of 1000 parts/g or less. The melting point of the polyamide is higher than that of the copolyamide resin by 20°C or more when measured by differential scanning calorimetry. A method of producing the copolyamide resin includes polycondensation of the diamine component and the dicarboxylic acid component in the absence of a solvent in an periodic-action reaction vessel equipped with a partial condenser. The diamine component is added to the molten diacarboxylic acid component continuously or periodically while maintaining manometric pressure inside the reaction vessel at 0.1 MPa or higher. Temperature of the reaction system is kept at a level which enables to maintain the entire reaction system in a fluid state. The vapour phase in the reaction vessel is heated to a temperature equal to or higher than the melting point of a nylon salt containing the diamine component and the dicarboxylic acid component before adding 80% of the full amount of the diamine component. The copolyamide resin composition contains the following components, in pts.wt: 100 said copolyamide resin, 0-30 talc, 10-150 inorganic filler. A cast film is obtained by melting the copolyamide resin. A moulded article is obtained by moulding the copolyamide resin or resin composition.EFFECT: invention enables to obtain a homogeneous copolyamide resin with good mouldability, as well as moulded articles with improved mechanical properties and heat resistance.13 cl, 1 tbl, 11 ex

Polyamide compound // 2561075
FIELD: chemistry.SUBSTANCE: invention relates to a polyamide compound, including polyamide resin and polyamide oligomer, which demonstrates an ability of oxygen absorption. The polyamide compound contains 25-50 mol.% of a diamine unit, which contains an aromatic diamine unit in an amount, equal to 50 mol.% and more; 25-50 mol.% of a dicarboxylic acid unit, which contains a linear aliphatic unit of dicarboxylic acid and/or an aromatic unit of dicarboxylic acid in an amount, totally equal to 50 mol.% and more; and 0.1-50 mol.% of a composite unit, containing tertiary hydrogen. The said polyamide compound has relative viscosity in range from 1.01 to 4.2. The invention also relates to a sheet, a container in the form of a tray or a bowl and a tube, which contain the polyamide compound.EFFECT: polyamide compound demonstrates the sufficient ability of absorbing oxygen in the absence of a contained metal, does not create any unpleasant smell and is characterised by very good transparency.12 cl, 2 dwg, 5 tbl, 416 ex

Composite polymer antifriction polyamide-based material // 2559454
FIELD: chemistry.SUBSTANCE: composite polymer antifriction polyamide-based material contains, wt %: carbon fibre or mixture of carbon fibre with glass fibre - 9.7-42.4, carbon nanotubes in form of monolayered or multilayered with number of layers from 2 to 70 or inserted into each other rolled in tube graphite planes with number of layers from 2 to 70 - 0.05-0.55, polyamide base - the remaining part. Outer diameter of nanotubes is selected from 0.1 to 100 nm, length - from 1 to 70 mcm. Polyamide base contains polyamide or mixture of polyamide with 20-40 wt % of poly-ε-capromide.EFFECT: invention makes it possible to increase service term of products due to considerable reduction of intensity of linear wear during friction, increase stability of friction coefficient, increase destructing tensile stress, preserve Charpy toughness with preservation of specified compression strength.3 cl, 2 tbl

oulding compound based on copolyamide with structural units of terephthalic acid and trimethylhexamethylenediamine // 2559328
FIELD: chemistry.SUBSTANCE: invention relates to copolyamide-based moulding compound, to moulded components, film, elementary fibres, as well as to fibrous composite material. Moulding compound contains at least 30 wt % of copolyamide, obtained from the following monomers: a) from 50 to 95 mol % of combination of diamine, selected from the group, including 1,9-nonandiamine, 1,10-decandiamine, 1,11-undecandiamine and 1,12-dodecandiamine, with terephthalic acid and b) from 5 to 50 mol % of combination of diamine, selected from the group, including 2,2,4-trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine and their mixtures, with terephthalic acid. Quantities given in mole percent relate to the total quantity of a) and b) components. Copolyamide can contain to 5 mol % of structural units, derivatives of other monomers. Said moulding compound is used for obtaining moulded components, film, elementary fibres, and fibrous composite material.EFFECT: invention makes it possible to obtain suitable for processing moulding compounds based on crystalline copolyamide, which is characterised by low water absorption.8 cl, 1 dwg, 3 tbl, 11 ex
Polyamide resin composition and moulded piece // 2557626
FIELD: chemistry.SUBSTANCE: invention refers to a polyamide resin composition containing polyamide consisting of a diamine chain containing 70 mole % or more of a paraxylylene diamine chain, and a dicarboxylic acid chain containing 70 mole % or more of aliphatic dicarboxylic acid chain with 6-18 carbon atoms, as well as (B) an aromatic compound of a seconday amine and (C) a sulphur organic compound. The composition contains from 0.05 to 5 weight portions of the sulphur organic compound and from 0.05 to 5 weight portions of the aromatic compound of the secondary amine per 100 weight fractions of polyamide. What is also described is a moulded piece made of the composition.EFFECT: heat resistance, rigidity, high temperature applicability.9 cl, 1 tbl, 13 ex
Nanocomposite polyamide material possessing higher barrier properties // 2557570
FIELD: chemistry.SUBSTANCE: invention relates to nanocomposite polyamide material, applied in packing film, possessing sufficiently high strength and barrier properties. Nanocomposite polyamide material contains polyamide and filling agent - layered silicate, represented by montmorillonite, preliminarily modified with salt of adipic acid and hexamethylenediamine (AH salt) in amount 10% of montmorillonite weight.EFFECT: elaboration of nanocomposite polyamide material with high strength and barrier properties.1 tbl

Elastomeric compositions and use thereof in articles // 2556992
FIELD: chemistry.SUBSTANCE: invention relates to thermoplastic elastomeric compositions. A dynamically vulcanisable alloy includes: a) at least one elastomer containing isobutylene; b) at least one thermoplastic resin, c) an anhydride-functionalised oligomer, wherein before functionalisation, the oligomer has molecular weight in the range of 750-1250, and d) a plasticiser which is selected from a group which includes tertiary amines, secondary diamines and sulphonamides, wherein the anhydride-functionalised oligomer and plasticiser are present in a ratio of 0.15-3.0, the elastomer is present in a dispersed phase in the form of fine vulcanised or partially vulcanised particles in the continuous phase of the thermoplastic resin.EFFECT: alloy retains high Shore hardness A and acquires improved fluidity necessary for treatment.12 cl, 4 tbl

Friction drive belt // 2551693
FIELD: machine building.SUBSTANCE: invention relates to machine building and can be used in transmission gears. A belt for friction gears (10) comprises a glue part (12) of rubber and a compressive part (14) of rubber which is set lower than the glue rubber part (12). A cord (11) being an element for belt tension, is built-in in the glue rubber part (12). The glue rubber part (12) is fitted by an upper layer (12A) making up the upper side, and by a lower layer (12B) making up the lower side which is located around the cord (11). The upper layer (12A) and the lower layer (12B) are produced at the vulcanization of rubber mix containing high-viscous elastomer, for example, EPM or EPDM, and low-viscous elastomer with the Mooney viscosity of the latter being less than that of the high-viscous elastomer, and containing modified polyamide microfibers in the capacity of short fibres (21A, 21B) respectively. The short fibres (21A, 21B) are oriented in the width direction and longitudinal direction of the belt respectively.EFFECT: better durability of a belt.15 cl, 3 dwg, 3 tbl
 
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