(57) Abstract:The invention relates to the chemistry and technology of macromolecular compounds, in particular to composite polymeric materials that can be used in various sectors of the economy where these materials have high requirements for such properties that allow you to composite materials to withstand prolonged exposure to harsh factors of the cold climate and deep solar UV radiation with minimal loss of physical and mechanical properties. The inventive polymer composition comprises, by weight. % : polyamideimides 4-phenyl - 2,2, 5,5-tetramethyl-3-imidazoline-3-oxide-1-oxime 1.0 to 1.5; soot 0.9 to 1.0. table 1. The invention relates to the chemistry and technology of macromolecular compounds, in particular to composite polymeric materials that can be used in various sectors of the economy where these materials are subject to high requirements, in particular, to such properties, which allow composite materials to withstand prolonged exposure to harsh factors of the cold climate and deep solar UV radiation with minimal loss of physico-chemical, MTSA ensuring long-term performance of products based on them in extreme climatic conditions of the Far North with a sharp seasonal temperature extremes from -70 to 40aboutC.Known polyamides by solid state polycondensation in a stream of inert gas on the basis of diamines and dicarboxylic acids, in particular obtained by the polymerization of-caprolactam, or on the basis of the diamine and sabatinovka acid. But all the manufactured polyamides are not stable to the influence of factors of the cold climate and deep UV radiation.Known also polyamideimides obtained by polycondensation in the melt based on bis-o-phenylendiamine, diphenyl ether dicarboxylic acid and diamine, based on the specified polymers having high molecular weight (CR=3,0-6,00 DL/g HCOOH), are characterized by high physical and mechanical strength properties, flexibility and elasticity. Compression-based materials have ap= 30-55 MPa, Ep= 3-6%.The closest in technical essence to the achieved positive effect is material, comprising heterocyclic polymer - polybenzimidazole and 4-phenyl-2,2',5,5'-tetramethyl-3-imidazoline-3-oxide-1-oxime.The disadvantages of the known synthetic polymeric materials on the basis of the above polyamides and polybenzimidazoles closely in cold climates and deep UV radiation is observed whitening samples after 9-12 months of exposure on the surface of the material cracks, which leads to the destruction of material;
if polyamideimides compression material equivalents during the year 2 times reduced, after 12-18 months. exposure on the sample surface gets scratched and cracked, which also leads to the destruction of the material;
compression-based materials polybenzimidazole containing 4-phenyl-2,2', 5,5'-tetramethyl-3-imidazoline-3-oxide-1-oxime in the same conditions almost retain their strength properties for 2 years, but further exposure they become brittle.The aim of the invention is to stabilize the physical-mechanical properties of polybenzimidazole in cold climates and harsh UV radiation and expansion of assortment of composite materials.This objective is achieved in that polyamideimides (PABI), obtained by polycondensation of aromatic tetraamines, diphenyl esters of dicarboxylic acids and diamines or-caprolactam in the melt when heated in a current of inert gas dissolved in concentrated formic acid or dimethylformamide with stirring, add as a hundred the AC.%.Stirring is continued until a homogeneous suspension and subjecting it to heat treatment for 1.0 to 1.5 hours at a temperature of 20-50aboutC. Later in suspension add ammonia solution for planting fine powder polyamideimide, separate stable powder on a filter, washed with water and dried.Polyamideimide press the pressed powders by direct extrusion at temperatures 180-260aboutWith and specific pressure of 800-1000 kg/cm2and get the compression materials having sourcep= 65-85 MPa, Ep= 3.5 to 4.5% . "After the impact of cold climate and deep UV radiation during the exposure in a period of 36 months in the conditions, Yakutsk compression materials have high physical and mechanical strength parameters:p49-63 MPa, Ep= 2,5-3,2%.For the synthesis of polyamideimides can be used bis-o-phenylendiamine different structure, preferably, as 3,3'-diaminobenzidine, 3,3', 4,4'-tetraaminodiphenyl, 3,3',4,4'-tetraaminodiphenyl, 3,3', 4,4'-tetraaminodiphenyl and diphenyl esters of adipic, sabatinovka acids, various diamines, preferably hexamethylenediamine were>/BR>H - O
Melting point 103-105aboutC.Decomposition temperature 170-190aboutC.The proposed method is confirmed by the following examples.P R I m e R 1. A mixture of 34,545 g (0.15 mol) of 3,3',4,4'-tetraaminodiphenyl (TDFA), 44,73 g (0.15 mol) diphenylacetate (DFA) and to 11.31 g (0.10 mol) of caprolactam (CL) is loaded into the condensation tube, repeatedly pulling her inert gas: the test tube is placed in a bath heated to 200aboutC. the Reaction mixture is melted, then the temperature within 1.0 to 1.5 h up to 270aboutC and maintained at this temperature for 4 h, then the reaction system create a vacuum of 1.0-2.0 mm RT.article and the reaction continues even 1,0 h at the same temperature. The yield of copolymer is almost quantitative.CR= 4,76 DL/g in concentrated HCOOH, C = 0.5 g/DL, 20aboutC). The copolymer is soluble in cold sulfuric and formic acids, amide solvents, tricresol.The polymer is dissolved in the condensed formic acid, adding with stirring to 1.0% stabilizer - 4-phenyl-2,2',5,5'-tetramethyl-3-imidazoline-3-oxide-1-oxime and 1.0% carbon black by weight of the polymer, subjecting the heat-treated for 1.0 hour at a temperature of 20-50aboutWith until a homogeneous suspensiononly press the powder on the filter, washed with water and alcohol, dried in a Cabinet at 100-120aboutC.The resulting powder was pressed into the mold by the method of direct compression at 240-260aboutWith and specific pressure of 800-1000 kg/cm2and get the compression material having the original ultimate tensile stress tensile p= 75-85 MPa and elongation at break Ep= =4,0%. "After the impact of cold climate for 3 years p60-63 MPa, Ep= 3,2%.The method of obtaining polyamideimides and preparation of polymer compositions in examples 2-4 is similar to example 1.P R I m m e R 2. Weighed the same as in example 1, the stabilizer 1.5 wt. % + carbon black and 1.0 wt.%pand Epin table.1.P R I m e R 3. Weighed the same as in example 1, the stabilizer of 1.0 wt.% + soot 0.9 wt.%pand Epin table.1.P R I m e R 4. Weighed the same as in example 1, the stabilizer 1.6 wt.% + carbon black and 1.0 wt.%pand Epin table.1.P R I m e R 5. A mixture of to 23.03 g (0.10 mol) of TADPO, are 11.62 g (0.10 mol) of the diamine (GMI) and to $ 70.88 (0.20 mol) of diphenylcarbonate (DFS) is loaded into the condensation tube and then the process is carried out analogously to example 1. Given the viscosity of 0.5% polymer solution in HCOOH equal
4-Phenyl-2,21,5,51-tetramethyl-3-imidazoline-3-oxide-1-oxime 1,0 - 1,5
Soot 0,9 - 1,0
FIELD: composite materials.
SUBSTANCE: invention discloses a method for manufacturing composite material for shielding-mediated protection against electromagnetic emission and can be used in electronics, in radio engineering, and also in a series of special-destination articles. In addition, material may be used for anechoic boxes and in various assemblies of technical devices and radio apparatuses. Method comprises mixing modified graphite-containing conducting filler and polymeric binder at weight ratio (50-80):(20-50). Once ingredients combined, mixture is additionally subjected to thermal expansion in thermal shock mode at 250-310оС and then molded. Polymeric binder is selected from polyolefins, polystyrene, fluoroplastic, polyvinylchloride paste and modified graphite is product obtained by modifying graphite with concentrated sulfuric and nitric acids. Material is characterized by that, in wavelength band from 2 to 5 cm at thickness of material up to 0.1 mm, transmission coefficient is decreased from -40 to -85 dB.
EFFECT: improved performance characteristics.
6 cl, 1 tbl, 2 ex
SUBSTANCE: invention relates to polymeric composition self-lubricating materials designated for making friction unit articles working in absence of lubricant or its limiting under conditions of dust content and effect of transient loadings. Antifriction composition comprises polytetrafluoroethylene, graphite and crushed quartz with dispersity 40-60 mcm as a silicate-containing additive and, additionally, bronze powder and chalk and components are taken in the following ratio, wt.-%: crushed quartz, 0.4-0.8; graphite, 3-8; chalk, 5-12; bronze powder, 15-25, and polytetrafluoroethylene, the balance. Invention provides enhancing wear resistance and heat stability of antifriction composition and simplifying its preparing.
EFFECT: improved and valuable properties of composition.
2 tbl, 7 ex
FIELD: polymer materials.
SUBSTANCE: cable plastic composition contains polyvinylchloride, dioctyl phthalate, lead(III) sulfate, calcium stearate, antimony trioxide, chalk, diphenylolpropane, and secondary plasticizer, in particular chloro-C14-C32-hydrocarbons with chlorination degree 24-55%, obtained through chlorination of ethylene oligomerization production waste.
EFFECT: improved workability of plasticized material due to diminished sticking of grain, improved physico-mechanical characteristics, and reduced cost price of product.
FIELD: polymer materials.
SUBSTANCE: invention relates to creation plasticized compositions based on suspension polyvinylchloride, which are used in manufacturing film materials, in particular polyvinylchloride insulation tape. Composition contains suspension polyvinylchloride, dioctyl phthalate plasticizer, lead(III) sulfate, calcium stearate lubricant, carbon black, mixture of chlorinated C10-C30-hydrocarbons with 40-50% Cl content as secondary plasticizer, and residue of vacuum distillation of cobalt-freed still residue obtained in rectification of propylene hydroformylation product with boiling range 300-310°C.
EFFECT: improved quality of insulation tape, reduced production expenses, and enabled partial utilization of waste.
FIELD: chemical technology, in particular plasticized composition based on polyvinylchloride for cable plasticate.
SUBSTANCE: claimed composition contains polyvinylchloride, dioctylphtalate, chloroparaffin, tribasic lead sulfate, calcium stearate, antimony trioxide, chalk, diphenylolpropane, carbon black and additionally contains metal-containing lubricant with acidic number at most 30 mg KOH/g. Lubricant is obtained by interaction of alpha-branched saturated monocarboxylic C10-C28-acids with polyhydric alcohol at 180-220°C in molar ratio of 1:(1-2) in presence of bivalent metal oxides: CaO, PbO, ZnO, MgO, BaO or two-component mixture thereof in ratio of 0.25-1:0.5-1, in amount of 0.5-2.0 mass % calculated as total reaction mass. As polyhydric alcohol ethylene glycol, glycerol, polyglycerol, which represents slop from glycerol distillation, are used.
EFFECT: articles with increased extension strength, elongation, heat resistance, improved appearance, decreased brittle point; resin composition assortment expansion.
2 cl, 16 ex, 1 tbl
FIELD: polymer materials.
SUBSTANCE: expandable polystyrene granules are manufactured by polymerization of styrene (if needed, jointly with comonomers) in water suspension, whereto foaming agent is added before, during, or after polymerization. Method is characterized by that polymerization proceeds in presence of swollen graphite having average particle size 20 to 100 μm in amount 2 to 20 wt % as calculated for monomers and granulated expandable polystyrene.
EFFECT: achieved formation of halogen-free fire-protecting components.
6 cl, 3 ex
FIELD: rubber and tire industry.
SUBSTANCE: invention relates to rubber mixtures based on unsaturated rubbers and can be used in manufacturing protective rubbers. The rubber mixtures comprises oleic acid additionally in the mass ratio of stearic and oleic acids = 1:1.5, respectively, in the following ratio of components, mass. p. p.: unsaturated rubber, 100; sulfur, 1.7-2.2; rubber accelerator, 1.4-1.8; softening agent, 8.0-15.0; protective wax, 1.0-2.0; N-isopropyl-N'-phenyl-n-phenylenediamine, 1.0; polymerized 2,2,4-trimethyl-1,2-dihydroquinoline, 2.0; N-cyclohexylphthalimide, 0.2-0.3; technical carbon, 55.0-60.0; zinc oxide, 3.0-5.0; stearic acid, 0.8; oleic acid, 1.2. Invention provides expansion assortment of rubber mixtures eliciting the improved complex of technological and physical-mechanical properties: improved technological and some physical-mechanical properties of rubbers - increased wear resistance of rubbers, fatigue endurance and reduced cost of articles due to change of 60% of stearic acid for more cheap oleic acid.
EFFECT: improved properties of rubber mixtures and rubbers.
FIELD: rubber industry.
SUBSTANCE: invention relates to the development of fluorine-containing rubber-base rubber mixture used in preparing rubber-technical articles with capacity to work at temperature up to 200°C in oils and fuels medium. Method involves preparing rubber mixture of the following composite, mas. p.p.: fluorine-containing rubber, 90-97; acrylate rubber, 3-10; blocked diamine of the formula: [H2N-R1-R-R2-NH2] MCl as a vulcanizing agent wherein R1 and R2 mean cyclic or aromatic hydrocarbon radicals; R means aliphatic hydrocarbon radical; M means alkaline metals, 2-10; technical carbon, 10-30; vulcanization activating agent, 3-5; acceptor of halogen-hydrocarbons, 3-6, and stearic acid, 1-2. Invention provides enhancing heat stability, resistance against corrosion, to reduce viscosity and to improve technological properties in processing.
EFFECT: improved and valuable properties of rubber mixture.
FIELD: polymers, chemical technology.
SUBSTANCE: invention relates to oil-filled 1,2-polybutadiene that can be used as different molded articles, to a method for its preparing, its composition and molded article, shoes footing material. Oil-filled 1,2-polybutadiene is prepared by addition of the definite amount of oily filling agent to 1,2-polybutadiene solution wherein polymerization process is terminated followed by stirring in the polymerization solution containing organic solvent and removing the solvent at the second stage of the method. The composition of oil-filled 1,2-polybutadiene for making molded article comprises abovementioned oil-filled 1,2-polybutadiene and one component taken among the group involving a foaming agent, functional compound for rubber or plastics and at least one component taken among the group consisting of thermoplastic resin, thermoplastic elastomer, natural rubber and synthetic rubber. The molded article is prepared by molding the oil-filled 1,2-polybutadiene. Material for shoes footing is prepared by foaming the composition of oil-filled 1,2-polybutadiene or by cross-linking and molding. Oil-filled 1,2-polybutadiene or composition based on thereof show excellent functions by abrasion resistance, fluidity, technological effectiveness, capacity for coloring, high image precision, flexibility and attachment capacity. Also, oil-filled 1,2-polybutadiene and compositions based on thereof can be used for different types of foodstuffs, material for shoes footing with high exploitation indices.
EFFECT: improved preparing method, improved and valuable properties of composition and article.
13 cl, 17 tbl, 43 ex
FIELD: rubber composition for production of cup-type seals.
SUBSTANCE: claimed butadiene-nitrile rubber composition contains (mass pts): powdered fluoroplastic as antiwear additive 10-18; sulfur 2.5; altax 2.7; zinc white 7.5; diphenylguanidine 0.25; aldol-α-naphthylamine 4.0; neozone D 1.0; furnace carbon black 120; dibutilsibacinate 20; santoflex IP 1.0; stearic acid 1.0.
EFFECT: cup-type seals with increased abrasive resistance, durability and reduced friction coefficient.
SUBSTANCE: modifying composition contains carbon-chain rubber, sulphur and quinol ether in the following ratio, pts. wt: rubber 100, sulphur 8-12, quinol ether 6-10. The modifying composition enables utilisation of rubber wastes of different composition. The product obtained using the modifying composition is used independently as a commercial-grade rubber mixture and as an additive to other rubber mixtures.
EFFECT: improved environmental friendliness due to utilisation of rubber wastes of different composition, wide range of modifiers for utilising rubber wastes.
6 tbl, 57 ex