Organic macromolecular compounds and their preparation or chemical working-up and compositions based thereon (C08)

C   Chemistry; metallurgy(315514)
C08            Organic macromolecular compounds; their preparation or chemical working-up; compositions based thereon(31132)
ethod // 2628516
FIELD: chemistry.SUBSTANCE: invention is a method of supplying liquid feed streams in a polymerization process. Method for supplying fresh feedstock selected from a fresh comonomer and a fresh inert hydrocarbon to a polymerization reactor is described. The polymerization reactor is a part of polymerization process that includes recovery systems at a high 0.5 MPa (5 bar) or higher and a low pressure of less than 0.5 MPa (5 bar). The method comprises feeding of mentioned fresh feedstock and a process stream comprising a first component selected from hydrogen, nitrogen and methane and a second component that is a monomer to a separator at a pressure of 0.4 MPa (4 bar) or less to obtain the first stream comprising most of the first component and a second stream comprising most of the fresh feed stream and most of the second component and feeding the second stream to the polymerization reactor. Method of treating a fresh feed stream is also described.EFFECT: preparation of a polymerization process having a high efficiency for the desired components of the final polymer, for example a monomer, but a low efficiency for other components, for example hydrogen.20 cl, 3 ex
ethod for extracting pectin substances from sugar beet production wastes // 2628435
FIELD: food industry.SUBSTANCE: method for extracting pectin substances includes washing the raw materials with water, grinding, sonication, hydrolysis and extraction, precipitation of pectin substances and their purification from the pectin-containing extract with ethyl alcohol. The sonication is carried out at the fixed frequency of 350 Hz, with the subsequent hydrolysis and extraction at the temperature of 55°C with the 1% solution of ammonium oxalate for 45-50 minutes. The obtained pectin-containing extract is purified and pectin substances are precipitated with ethyl alcohol with the addition of sodium chloride salt in the amount not exceeding 10 g per litre of the alcohol. Wherein the sonication is carried out for 20 minutes at the temperature of 40°C.EFFECT: invention allows to increase the yield of pectin and does not require the use of strong mineral acids as an extractant.3 ex

New plastifiing mixtures and plastisol compounds containing them // 2628395
FIELD: chemistry.SUBSTANCE: mixture contains a plasticiser based on benzoate ester as a primary plasticiser and a compatibilizing plasticizing component. The primary dibenzoate plasticiser is selected from the group: diethylene glycol dibenzoate, dipropylene glycol dibenzoate, 1,2-propylene glycol dibenzoate, and mixtures thereof. The compatibilizing plasticizing component is dioctyl succinate, 3-phenylpropyl benzoate or 1,2-propylene glycol dibenzoate in case, it is not used as a primary plasticiser.EFFECT: invention allows to produce plastisol compositions, phases of the liquid dispersant for the polymer, plasticizing mixtures having a low viscosity and good rheological characteristics.13 cl, 10 dwg, 9 tbl, 7 ex

Dry cellulose fibers and the process of making the same // 2628382
FIELD: chemistry.SUBSTANCE: dry cellulose fibers contain at least 50 wt % of fibers having a length of up to 350 mcm and a diameter in the range of 100-500 nm, where the fibers do not contain additives, are not derivatized and are redispersible in water. A film of dry cellulose fibers containing the described fibers is shown where the film is water dispersible. Also described is a process for producing a dry film of cellulose fibers, comprising preparing a liquid slurry from the above-described cellulosic fibers obtained by multi-step highly refined wood or plant fibers and retaining more than 90% of the fibers on the forming section of the papermaking machine in which the fibers do not contain additives and are not derivatized. The film can be converted into powders or flakes for transport, storage or subsequent use.EFFECT: creation of repeatedly water-dispersible fibers of fibrillated cellulose, obtained without the use of chemical additives and derivatization.23 cl, 3 dwg, 5 tbl, 5 ex
ethod for producing polymethylphenylsilsesquioxanes // 2628128
FIELD: chemistry.SUBSTANCE: method is proposed for producing polymethylphenylsilsesquioxanes by homogeneous hydrolytic copolycondensation of mixtures of methyl- and phenyltrichlorosilanes at 0-80°C in aprotic organic solvents containing urea and acetone, during the interaction of which in the process, water for hydrolysis of chlorosilanes and a nitrogenous base for binding the hydrogen chloride evolved in this process are simultaneously generated. The molar ratio of trichlorosilane: carbamide: acetone is 1.0:(3.0-6.0):(3.0-12.0).EFFECT: proposed method allows to produce highly functional branched, ladder and polycyclic polymethylphenylsilsesquioxanes, simplifies the isolation of the target products by eliminating the multiple washing of polymethylphenylsilsesquioxanes from acidic impurities, prevents the formation of gel-like products of hydrolytic polycondensation, and improves environmental safety and technical and economic parameters of the process.3 cl, 1 tbl, 6 ex

Intermediate materials containing polyisocyanurate // 2628086
FIELD: chemistry.SUBSTANCE: method comprises provisio of a polyisocyanate composition, provision of at least one trimerization catalyst compound, provision of compounds containing a group with -CO-NH2 structure, optionally dissolved in an organic solvent, provision of a trimerization catalyst composition by combining and mixing compounds containing a -CO-NH2 group with at least one trimerization catalyst compound, combining and mixing the resulting trimerization catalyst composition with the polyisocyanate composition, composition reacting and optional cooling. Combination and mixing of the trimerization catalyst composition with the polyisocyanate composition is carried out in such amount that the number of equivalents of compounds containing the -CO-NH2 group, with respect to the number of the trimerization catalyst equivalents is greater than 0.75 and less than or equal to 4. The obtained stable intermediate and additionally curable material containing polyisocyanurate contains free isocyanate groups, has an isocyanate number of 5-30 wt % and has a final concentration of polyisocyanurate compounds that does not vary by more than 10% of its initial value at room temperature and ambient pressure for several hours.EFFECT: advantage of the material obtained is in the possibility to stop the polyisocyanurate formation intentionally to achieve the desired degree of polyisocyanate conversion to polyisocyanurate, with a possibility of additional curing at relatively low temperatures.14 cl, 4 dwg, 3 tbl, 27 ex
Composition of polyisocyanate trimerization catalyst // 2628084
FIELD: chemistry.SUBSTANCE: trimerization catalyst composition is proposed comprising a trimerization catalyst compound selected from one or more organic metal salts, preferably alkali or alkaline earth metal salts, and one or more compounds selected from compounds that contain a carboxamide group of the structure -CO-NH2, and/or from compounds that contain a group of the structure -CO-NH-CO-. A stable composition of polyisocyanates containing a catalyst composition and a process for preparing a polyisocyanate composition are also provided.EFFECT: inventive trimerization catalyst composition is stable, when stored at a temperature of 20 degrees and ambient pressure for several months, and when added to the composition, the polyisocyanates make it possible to prepare a liquid stable composition of polyisocyanates.20 cl, 2 tbl, 20 ex

Ionic silicone hydrogels // 2628073
FIELD: chemistry.SUBSTANCE: silicone hydrogel prepared from a reaction mixture containing 30-70 wt % of mixtures of slow-reacting hydrophilic monomers selected from N-vinylamide, vinylpyrrolidone and N-vinylpiperidone; A silicone-containing component selected from mono (meth) acryloxyalkylpoly (dialkyl) siloxane and styrylpoly (diallyl) siloxane; and a hydroxyl-containing component. The ratio of the half-turn time of each of the slow-reacting hydrophilic components to the half-time of the silicone-containing component is at least 2.EFFECT: proposed hydrogel derived from inexpensive commercial monomers has high wettability without surface modification, low stiffness, high transparency and satisfactory permeability for oxygen.76 cl, 3 dwg, 31 tbl, 34 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

ethod for producing waterproof carbon-containing coating for details from chemically active material // 2627884
FIELD: chemistry.SUBSTANCE: method involves preparing the powdered polymer material to produce a predetermined dispersion fraction, applying the polymeric material to the heated part in a vibro-vortex method. Before applying the polymer coating, the coated part is fixed on a support, then heated, a "fluidized bed" is formed from the particles of the starting polymer material, which is a composition from a mixture of high-pressure polyethylene with a dispersion of not more than 315 mcm, technical carbon and heat stabiliser from among the derivatives of aromatic phenols or secondary aromatic amines, with the following ratio of ingredients, wt %: technical carbon - 1.5-2, thermal stabiliser - not more than 2, high-pressure polyethylene - the rest. The heating of the part is carried out under certain conditions and the thickness of the coating is controlled, varying the multiplicity of immersion of the articles to be coated in the mass of the "fluidized bed" of weighted particles and the time that the products are in the said medium until the specified coating thickness is reached.EFFECT: ensuring the possibility of producing a reliable waterproof coating on chemically active materials, increasing the resistance to embrittlement of the coating at operating temperatures of parts close to the temperature of destruction of the polymer coating, simplifying the method.2 dwg, 3 ex
ethod for producing activated organomineral powder for bitumen-concrete mixtures // 2627881
FIELD: chemistry.SUBSTANCE: in the method for producing epy activated organomineral powder for bitumen-concrete mixtures, the co-milling of silica gel and ash-and-slag wastes is carried out in the ball mill. The selection from the produced milled material of the working fraction with a size of 0.07-0.31 mm is performed, the said working fraction is loaded into the mixer, in which also the slaked lime is loaded, and intermediate mixing is carried out. Then, a hydrophobic surfactant is loaded into the mixer in amount of 0.3-0.5 wt % of the slaked lime and final mixing is carried out until the homogeneous mixture is produced.EFFECT: increasing the ecological and economic efficiency of producing activated organomineral powder.1 tbl, 3 ex

odified technical carbon, which has low quantity of pah containing its elastomers // 2627877
FIELD: chemistry.SUBSTANCE: modified furnace black carbon has an annealed surface attached and/or adsorbed to at least one chemical group and has a statistical surface area (STSA) of 70-250 m2/G and the content of polyaromatic hydrocarbons (PAH) from the PAH22 group in amount of 75 ppm or less. This chemical group may be triazole, pyrazole, imidazole or combinations thereof, for example 1,2,4-triazol-3-yl group, 3-mercapto-1,2,4-triazol-5-yl group. The surface of carbon black can be annealed at 1200-1800°C in the process of its production from the feedstock or to apply the same temperature to the ready-made technical carbon with the indicated PAH content and then to attach and/or adsorb the mentioned chemical group. The modified carbon black is introduced into the elastomeric composition prior to vulcanization.EFFECT: invention makes it possible to increase the abrasive wear resistance of the elastomeric composition and to reduce its hysteresis.102 cl, 2 dwg, 5 tbl, 5 ex
ethod for producing low-molecular chitosan and chitosan oligomers // 2627870
FIELD: chemistry.SUBSTANCE: method for producing low-molecular chitosan and chitosan oligomers by a chemical depolymerization method, including hydrolysis of chitosan in the presence of an acid, followed by filtration, fractionation, purification and drying of products, characterized in the fact that hydrolysis of chitosan is carried out with 2.5-12.5% dilute nitric acid at a temperature of 70°C, followed by separation of the hydrolyzate into two fractions - a precipitate of low-molecular chitosan and a mother liquor, then chitosan oligomers are precipitated from the mother liquor during addition of isopropyl alcohol and cooling. Then, both products are washed with isopropyl alcohol and air-dried, finally, the products of chitosan depolymerization are redissolved in water and dried lyophilically.EFFECT: method is proposed for producing a product of a narrow fractional composition which is highly soluble in water.5 ex
Thermally conductive silicone composition and cured product of same // 2627868
FIELD: chemistry.SUBSTANCE: invention relates to a thermally curable, thermally conductive silicone lubricant composition comprising the following main components: (A) 100 wt. parts of organopolysiloxane having a viscosity of 100 to 100,000 mPa⋅S at 25°C and containing at least one alkenyl group per molecule, (B) from 10 to 900 wt. parts of organopolysiloxane with the general formula , where R1 Is an independently unbranched alkyl group having from 1 to 10 carbon atoms, R2 Is an independently unbranched alkyl group having 1 to 10 carbon atoms, n is an integer from 2 to 100, and is an integer of 1 to 3, (C) an organohydride polysiloxane containing at least two hydrogen atoms bonded to silicon, Per molecule in such an amount that the number of Si-H groups divided by the number of alkenyl groups in components (A) and (B) can be in the range of 0.1 to 10.0, (D) a catalyst selected from the group, consisting of platinum and platinum compounds in an amount such that 0.1 to 500 m of the platinum atom, based on the weight of the component (A), (F) from 100 to 20,000 wt. parts of heat conductive filler with a thermal conductivity of at least 10 W/m °C and (G) from 0.1 to 100 wt. parts of highly dispersed silicon dioxide, which is particles of colloidal silicon dioxide with a treated surface.EFFECT: lubricant has a good form stability, such that the shape can remain unchanged immediately after it is imparted and remains elastic after curing.3 cl, 3 tbl

ultilayer metal sheet and method of its manufacture // 2627863
FIELD: metallurgy.SUBSTANCE: metal sheet contains metal coversheets and, at least, one core layer of polymer interposed between the cover sheets, which is connected to the closure of the material with the coversheets. The core layer of the multilayer sheet has a fibrous reinforcing component and a fiber surrounding the fibers of the reinforcing component, a polyurethane matrix formed from an aqueous solvent-free polyurethane dispersion. Fibers are present in the polyurethane matrix in the form of short lengths of fibers with a maximum length of 50 mm. The fibers of the reinforcing component consist of mineral fibers, in particular ceramic fibers.EFFECT: creating a multilayer metal sheet having increased core stiffness characteristics, without limiting its use, particularly suitable for cold forming.16 cl, 2 dwg

Composite particles including fluoropolymer, methods of production and products including them // 2627857
FIELD: chemistry.SUBSTANCE: composite particles include individual, hollow, ceramic spheroids and a fluoropolymer layer. The fluoropolymer is a homopolymer or copolymer of perfluoroalkyl vinyl ether; perfluoroalkoxy vinyl ether; at least one fluoroolefin, independently represented by the formula C(R)2=CF-Rf, wherein Rf is fluorine or a perthoroalkyl having from 1 to 8 carbon atoms and R is hydrogen, fluorine or chlorine; or a combination thereof. The composite material includes a plurality of composite particles distributed in the matrix material. The matrix material comprises at least one of the following materials: polyethylene, polypropylene, silicone rubber, polystyrene, epoxy or phenolic.EFFECT: obtaining syntactic foams for insulation, for example, deep-water insulation, with increased strength, used, for example, in oil and gas production.21 cl, 4 dwg, 3 tbl, 8 ex

Rubber composition for use in the tire protector // 2627853
FIELD: chemistry.SUBSTANCE: rubber composition contains: per 100 wt parts of diene rubber containing 40 wt % or more of butadiene rubber and styrene-butadiene rubber, from 80 to 150 wt parts of silica having a specific surface area of CTAB from 150 to 250 m2/g, a silane compound containing a long chain alkyl group in an amount of 1 to 10 wt % of the amount of silica. The styrene component in the diene rubber is from 15 to 20 wt %, and the vinyl component in the diene rubber is from 18 to 28 wt %. The average temperature of the vitrification of diene rubber is -55°C or lower.EFFECT: invention makes it possible to improve performance on ice, characteristics on wet surfaces and durability before or above traditional levels.5 cl, 1 dwg, 3 tbl
Composite system with high-impact strength and a high softening point // 2627850
FIELD: chemistry.SUBSTANCE: composite material system comprises a layer (a) of a polymer mixture containing or comprising (A) (co) polymer (meth) acrylate or a mixture of (co) polymers (meth) acrylate to at least 30 wt % based on total weight of A), formed from repeating units of methyl methacrylate. The polymer blend comprises B) a (co) polymer of styrene and maleic anhydride, wherein the proportion of repeating units of maleic anhydride is 10-30 wt % of the (co) polymer (B), and the proportion of repeating units of maleic anhydride in the layer (a) of the polymer mixture is 1-27 wt % of layer (a) of the polymer mixture. The composite system comprises (b) optionally one or more layers of optically transparent adhesive, layers of glass and/or optical films, (c) a layer of glass or polycarbonate. The invention also relates to a display that includes a composite material system.EFFECT: reducing the deformation of the display, the shell of the touch screen display or glazing.15 cl, 3 dwg, 2 tbl, 3 ex
ethod for producing carbon-fluorocarbon nanocomposite material // 2627767
FIELD: chemistry.SUBSTANCE: method for producing a carbon-fluorocarbon nanocomposite material is proposed, which includes the thermal degradation of solid polytetrafluoroethylene, which is carried out in a plasma medium formed as a result of the preliminary destruction of a similar sample of polytetrafluoroethylene in a pulsed high-voltage electric discharge in air at a pulse amplitude of 2-10 kV, followed by the collection of degradation products in the form of an ash-like product containing individual nanoparticles of the elements that make up the electrodes. The product obtained is subjected to heat treatment by heating with an external source before the appearance of electrical conductivity, accompanied by self-heating of the product, when electric current is passed therethrough. As a result of heat treatment, a carbon-fluorocarbon material containing nanografen bands is produced and a powdered product consisting of composite nanoparticles containing carbon and fluorocarbon components.EFFECT: producing high-yield carbon-fluorocarbon nanocomposite materials with a well-defined nanostructure providing their new properties and expanding the field of application.3 cl, 12 dwg, 2 ex
ethod of polymerization in the mass for obtaining polydienes // 2627708
FIELD: chemistry.SUBSTANCE: method for producing the polydiene comprises the steps of: polymerizing a conjugated diene monomer using a metallocene complex containing catalyst system in a polymerization mixture containing less than 20 wt % of the solvent of the total weight of the polymerization mixture to obtain polymer chains that contain reactive ends and introducing a functionalizing agent into a polymerization mixture to react with reactive polymer chains to form a functionalized polymer, wherein the metallocene complex containing catalyst system comprises a combination or reaction product of: (a) a metallocene complex, (b) an alkylating agent, and (c) a noncoordinating anion; where the metallocene complex is defined by the formula I , where M is an element of a lanthanide series, scandium or yttrium, Cp is a cyclopentadienyl group or a cyclopentadienyl group derivative, Y is a hydrocarbyloxy group, a thihydrocarbyloxy group, an amino group, a silyl group, a cyclopentadienyl group or a cyclopentadienyl group derivative, X is a hydrogen atom, a halogen atom, a hydrocarbyloxy group, a thihydrocarbyloxy group, an amino group, a silyl group or a monovalent organic group, each L is independently a neutral Lewis base, n is a number from 0 to 3, or where Cp and Y are combined by a divalent group, and where from 0.0005 to 0.01 mmol of metallocene complex per 100 g of conjugated diene monomer is used.EFFECT: reaction equipment does not contain gel residues after polymerization in bulk, which is ensured by the minimal release of heat during polymerization.16 cl
ethod of obtaining polydienes and polydiene copolymers with reduced purity on cold // 2627705
FIELD: chemistry.SUBSTANCE: method for preparing the bound polymer comprises the steps of: (i) polymerizing a conjugated diene monomer and optionally a copolymerizable monomer thereto to produce a polymer containing a reactive end group; (ii) reacting the reactive end group of the polymer with a polyisocyanate having an amount of functional groups of X to form an intermediate polymeric product; and (iii) reacting mentioned intermediate polymer product with a polyol having a functional group number of Y with a bound polymer product, wherein X+Y≥5. A bound polymer and a tire component are also claimed.EFFECT: obtained polymers exhibit greater resistance to cold flow, have good technological properties of cured mixtures.18 cl, 4 tbl
ethod for producing nanocrystallites of low-molecular chytosan // 2627540
FIELD: chemistry.SUBSTANCE: method involves dispersing in water of high molecular weight chitosan with a molecular weight of 190-250 kDa with vigorous stirring, subsequent treatment in a 9.00-17.00% aqueous solution of sulfuric acid at 100-120°C for 20-55 minutes for homogeneous hydrolysis. The hydrolysis product is then precipitated from the sulfuric acid solution by introducing a 10% sodium hydroxide solution into the hot solution at a volume ratio of sodium hydroxide to sulfuric acid of 1:0.667. The product obtained is washed and dried at room temperature.EFFECT: invention makes it possible to obtain low molecular weight chitosan with a molecular weight of 5-20 kDa with a high degree of crystallinity, thermal stability, antimicrobial activity and biological compatibility.1 tbl, 3 ex
Catalyst and method for producing ultra-high molecular weight polyethylene using this catalyst // 2627501
FIELD: chemistry.SUBSTANCE: invention relates to a method for producing ultra-high molecular weight polyethylene (UHMWPE) using the supported ziegler type catalyst comprising a transition metal compound on a magnesium-containing support. The catalyst for producing ultra-high molecular weight polyethylene-UHMWPE contains a transition metal compound on a magnesium-containing support, which is produced by reacting a solution of an organomagnesium compound of the composition: Mg (C6H5)2n MgCl2 mR2O, where: n = 0.37-0.7, m = 2, R2O is a simple ether with R = i-Am, n-Bu, with the reaction product of alkylchlorosilane of the composition: R'kSiCl4-k, where: R' - alkyl or phenyl, k = 0, 1, 2, and silicon tetraalkoxide Si (OEt)4 taken at the molar ratio R'kSiCl4-k, / Si (OEt)4 = 50-2. As the transition metal compound, a mixture of titanium compounds (TiC4 or Ti (OEt)2Cl2) and vanadium (VCl4, VOCl3). The method for producing ultra-high molecular weight polyethylene UHMWPE in the suspension mode in a hydrocarbon diluent medium is carried out at a polymerization temperature above 70°C in the presence of an organoaluminum cocatalyst using the said catalyst. Herewith an ultra-high molecular weight polyethylene with a molecular weight in the range of 2.5⋅106 up to 8⋅106 g/mol.EFFECT: using high polymerisation temperatures, which allows to increase reactor productivity and the possibility of producing ultra-high molecular weight polyethylene with the required molecular weight.3 cl, 1 tbl, 7 ex
Epoxy adhesive binder and film glue on its basis // 2627419
FIELD: chemistry.SUBSTANCE: epoxy adhesive binder contains components at the following ratio, wt %: liquid epoxyoxazolidone resin (50.0-77.0), polyethersulfone (6.0-20.2), a solid epoxy resin based on bisphenol A (4.95-23.50), a latent curing agent (4.0 -6.0) of dicyandiamide, a cure accelerator - asymmetrically disubstituted urea (0.5-2.0), aerosil modifier (0.3-5.0). The film glue is a paper with anti-adhesive coating and a layer of epoxy adhesive binder applied thereto, the surface density of the layer of the said binder on the release coating is 200-270 g/m2.EFFECT: increasing the strength of adhesive bond with uniform separation of the skin from the honeycomb core, increasing the degree of the temperature preservation of the cured adhesive binder glass transition after exposure in the heat-water chamber at a temperature of 70 degrees and a humidity of 85 percent for 30 days, the ability to cure the adhesive epoxy binder for more energy-efficient mode.9 cl, 3 tbl, 12 ex
ethod of processing polymeric wastes based on polyamide mixture and polyethylene // 2627418
FIELD: chemistry.SUBSTANCE: previously peeled and shredded waste polymer mixtures based on polyamide and polyethylene is processed by melt extrusion at a temperature of 220-250°C. During ultrasonic processing is carried out on the melt with the impact frequency of 20-60 kHz for a time of 0.1-10 seconds, the radiation energy density of from 100 to 5000 Joules per cubic centimeter of extruded melt. The amplitude of the oscillator vibrations is from 1 to 20 microns.EFFECT: provide compositions and articles based on the waste mixture of polyethylene and polyamide with high deformation-strength and processability, delamination exception polymer waste and extrusion phase in the preparation of finished products.9 cl, 14 ex
Dispersions of graphene carbon particles and method for their production // 2627411
FIELD: chemistry.SUBSTANCE: dispersions of graphene carbon particles are obtained using a polymeric dispersant. The polymeric dispersant includes an anchor block containing glycidyl(meth)acrylate, 3,4-epoxycyclohexylmethyl(meth)acrylate, 2-(3,4-epoxycyclohexyl)ethyl(meth)acrylate, allyl glycidyl ether and mixtures thereof reacted with a carboxylic acid comprising 3-hydroxy-2-naphthoic acid, paranitrobenzoic acid, hexanoic acid, 2-ethylhexanoic acid, decanoic acid and/or undecanoic acid. The polymeric dispersant also includes at least one tail block containing at least one (meth)acrylic acid alkyl ester.EFFECT: provision of increased electrical conductivity.20 cl, 3 dwg, 5 tbl
Polymeric composition for high-frequency energy absorbtion // 2627401
FIELD: chemistry.SUBSTANCE: polymer composition for high-frequency energy absorption includes, mass parts: low-molecular synthetic dimethylsiloxane SKTN A grade 15-25, the iron carbonyl radio engineering R-10 105-175, cold curing catalyst No. 1 1.2-1.8, ethyl silicate-40 1.5-2.5, oleinic acid 0.5-0.9.EFFECT: increase of vitality and elasticity, higher microwave signal wave attenuation.2 tbl, 3 ex

Device for modified bituminous binder manufacture // 2627392
FIELD: chemistry.SUBSTANCE: device for modified bituminous binder manufacture includes a tank with oil heating coils, thermal insulation, galvanized metal sheet lining, a manhole, a modifying components supply unit and a mixer with an electric drive in the form of a vane device in a cylindrical outer casing with bitumen and modifier mixture taking from the upper layers and feeding to the tank bottom, input and output circulation pipes with ball valves heated by thermal oil, bitumen filter, electric pump with an inverter and a passive hydrodynamic dispersant, as well as a dispersant washing unit as part of the washing oil tank and oil pump connected by pipes to the dispersant inlet and outlet via three-way valves, allowing the dispersant to be washed with an oil flow directed oppositely to the flow through the dispersant during bitumen modification cycle.EFFECT: production of modified bitumen, including polymer-modified, without the use of plasticisers, and energy-efficient obtaining of uniform distribution of the modifying component or optimal continuous spatial structure of thermoplastic elastomers in the entire volume of modified bitumen.3 cl, 1 dwg, 2 tbl, 2 ex
ixture of vinylidenhloride interpolimer and poly(butylenesuccinate) // 2627388
FIELD: chemistry.SUBSTANCE: invention relates to a mixture for forming cast, blow-moulded extruded, cast, injection moulded or calendered products comprising, based on the weight of the mixture: A) from 80 to 98 wt % of a vinylidenechloride (VDC) interpolymer, wherein VDC interpolymer Includes units derived from one or more monomers of alkylacrylate, alkylmethacrylate or acrylonitrile, and B) from 2 to less than 15 wt % of poly(butylenesuccinate) (PBS), wherein BPS has Mw from 40,000 to 1,000,000 Dalton.EFFECT: barrier films made from a composition containing a vinylidenchloride interpolymer and polybutylenesuccinate exhibit improved tensile strength, both in the longitudinal direction and in the transverse direction, without significantly reducing the rate of oxygen penetration, as compared to barrier films manufactured under similar conditions in all respects, except that the polybutylenesuccinate was replaced with an additional vinylidenchloride interpolymer.10 cl, 2 tbl
Chromium-free magnesium vanadate containing anti corrosive paint composition and paint films obtained by coating the same // 2627385
FIELD: chemistry.SUBSTANCE: describes a chromium-free paint composition that includes a film-forming resin (A), an anticorrosive pigment (B) that contains at least one kind of amorphous MgO-V2O5 based compound, and a crosslinking agent (C) in which the ratio by mass content of the above-mentioned anticorrosive pigment (B) is from 10 to 80 wt % with respect to the sum of the solid fraction of the resin of the above resin film forming resin (A) and the above cross-linking agent (C), the content of the total amount of eluted ions in the 10% aqueous solution of the above-mentioned anticorrosive pigment (B) is from 10 ppm up to 100 ppm also described is a paint film that was obtained by the application of a chromium-free paint composition.EFFECT: chromium-free paint composition is obtained, and it has an increased corrosion resistance.8 cl, 8 tbl, 34 ex

New materials and methods for dispersing nanoparticles in matrices with high quantum outputs and stability // 2627378
FIELD: physics.SUBSTANCE: first, luminescent nanoparticles are mixed, the outer surface of which is covered with two types of protective molecules, with a solid polymer precursor. Protective molecules contain the first and second functional groups. The first functional group is connected to the outer surface of the luminescent nanoparticle, and the second functional group provides a miscibility with the precursor of the solid polymer and/or the ability to react with it. The first functional group of the first type of protective molecules contains a metal ion having coordination functionality, and the first functional group of the second type of protective molecules has the functionality of a Lewis base. A polymeric article, for example a coating, a self-supporting layer or a plate transmitting light with a wavelength of 380-750 nm is produced from the resulting solid polymer with embedded luminescent nanoparticles. The lighting device comprises a light source and a light transducer including mentioned solid polymer. Any luminescent nanoparticles can be used in the invention.EFFECT: stability of nanoparticles and the colour purity are improved, the luminescence efficiency is increased and the lifetime is increased.16 cl, 8 dwg

Optic composite material and method for treatment thereof // 2627371
FIELD: physics.SUBSTANCE: material comprises a suspension of lead sulfide nanoparticles in the aqueous-alcoholic solution, metal nitrate and polyvinylpyrrolidone. Also the method is disclosed for treating a material, which comprises material irradiation by the electromagnetic radiation with the wavelengths of 455-635 nm and subsequent exposure at the room temperature without irradiation during 0.1-24 hours.EFFECT: developing a composite material having high nonlinear optical and spectral fluorescent characteristics in the visible and near infrared spectral range, developing a high-performance method of processing the material, which does not require special manufacturing equipment.2 cl, 9 dwg, 2 tbl, 5 ex
ethod of control of polymer particles distribution on sizes in proceeding of water polymer dispersion, water polymer dispersion and its application // 2627365
FIELD: chemistry.SUBSTANCE: method of controlling the size distribution of polymer particles formed during the preparation of the aqueous polymer dispersion is described; it comprises: preparing an aqueous solution of a polysaccharide which comprises: (a) 10 to 40 wt % of a polysaccharide containing a free hydroxyl group such as starch, polymerization in a solution of the polysaccharide in the presence of a water-soluble oxidation-reduction system for crosslinking by grafting; (B) from 30 to 60 wt % of at least one optionally substituted styrene, (c) from 60 to 30 wt % of at least one C1-C4 alkyl (meth) acrylate, (d) from 0 to 10 wt % of other ethylenically unsaturated copolymerizable monomers, wherein the sum of (a)+(b)+(c)+(d) is 100%. The polysaccharide is an anionic starch derivative, and the size distribution of the polymer particles obtained is controlled by adjusting the viscosity of the polysaccharide solution before polymerization to a level of <10 mPaSec⋅, with a solid content of 15%, as measured at 23°C using a Brookfield LVDV viscometer with a spindle 18 at 60 rpm. An aqueous polymer dispersion for use in the pulp and paper industry is also described.EFFECT: preparation of an aqueous polymer dispersion containing small particles, with a narrow size distribution.15 cl, 1 tbl, 7 ex

Fire-resistant material containing biopolymer // 2627363
FIELD: chemistry.SUBSTANCE: flame retardant material comprises a matrix formed by at least one organic polymer, a flame retardant additive selected from among metal hydroxides, and a binder forming an interface between the matrix and the flame retardant additive. The organic polymer in the matrix contains at least 50 wt % of one biopolymer. The binder is an ethylene-vinyl acetate copolymer containing at least 40 wt % of vinyl acetate grafted with maleic anhydride.EFFECT: resulting material is flexible and shockproof and can be processed by moulding or extrusion, in particular by injection moulding.15 cl, 3 dwg, 7 tbl
Composition of random sopolimer propylene for pipe applications // 2627360
FIELD: chemistry.SUBSTANCE: composition contains a random propylene copolymer (A) with, at least, one comonomer selected from alpha-olefins with 2 or 4 to 8 carbon atoms and a nucleating agent (B). The random propylene copolymer (A) contains, at least, a low molecular weight propylene copolymer (low molecular weight fraction) and a high molecular weight random propylene copolymer (high molecular weight fraction). In addition, the polypropylene composition has a polydispersity coefficient (PI) in the range of 2.0 to 7.0, a melt flow rate of MFR2 (2.16 kg, 230°C) in the range of 0.05 to 1.0 g/10 min and Charpy impact strength for a notched specimen at 0°C, which is, at least, 4.0 kJ/m2.EFFECT: composition has a favorable balance of properties with respect to mechanical properties, including the properties of impact resistance, stiffness/flexibility and workability.16 cl, 3 tbl
Turbulent viscosity reducing additive with anticorrosion properties // 2627355
FIELD: chemistry.SUBSTANCE: turbulent viscosity reducing additive with anticorrosion properties contains the ultrahigh-molecular polymer of alpha-olefins, the condensation product of higher amines with carbon atoms number of 6-30 with the oxyalkylation degree of 2-50, while using as the oxyalkylating agent of the epoxy compound with the carbon atoms number of 2-6 with the dibasic organic acid and the carbon atoms number 3-9, the solvent. The mixture of linear and branched aliphatic monoatomic and polyatomic alcohols and/or ethers with the carbon atoms number of 1-15 is used as the solvent.EFFECT: reduction of the hydraulic resistance in the main pipeline and increase of its throughput capacity with simultaneous protection against the corrosion of the main pipeline inner surface and the equipment associated with it, used for transportation of hydrocarbon liquids.2 cl, 1 tbl, 25 ex
Acrylonitrile copolymer production method // 2627264
FIELD: chemistry.SUBSTANCE: process of preparation of the acrylonitrile copolymer is that a controlled radical polymerization of the monomer mixture comprising the following components, moll. %: 95-97 acrylonitrile, 2-4 methyl acrylate, 1-2 dimethylaconate, for 100-160 hours at a temperature of 50-80°C. The polymerisation is carried out in a solution of dimethylsulfoxide, under an argon atmosphere, using an initiator and a catalytic system. The components of the mixture are taken in the following molar ratio: 900-1900 of mentioned monomer mixture, 0.8-1 of carbon tetrachloride as initiator, 1-5 of copper (I) bromide, 2-15 tris [(2-pyridyl) methyl] ligand, 1-20 glucose as an activating agent.EFFECT: invention makes it possible to obtain a copolymer having a number average molecular weight of more than 60 kD and a narrow molecular weight distribution to 1,32.3 cl, 5 ex

Domestic animal fodder production method // 2627160
FIELD: biotechnology.SUBSTANCE: method of manufacturing animal feed is provided. Treated biomass containing polysaccharides in the form of cellulose, hemicellulose or starch radiation dose of 5 Mrad to 100 Mrad using an electron beam operating at a power of 5 kW to 500 kW. Prepared food material comprising a material having a number average molecular weight of from about 3000 to about 50,000 daltons. Further, food material is compacted to give an animal feed. Wherein mentioned method does not include the use of a microorganism.EFFECT: resulting food material is the availability of nutrients for protein or amino acid exceeding the availability of nutrients for protein or amino biomass, such recycled biomass is easily hydrolyzed in the stomach of the animal.14 cl, 46 dwg, 21 tbl, 45 ex

High-effective method for bacterial polysaccharide production, preparation of conjugate based thereon and immunogenic composition // 2627156
FIELD: biotechnology.SUBSTANCE: method for production of serogroup X Neisseria meningitidis capsular polysaccharide, its conjugate with a carrier protein and an immunogenic composition based on the conjugate for preparation of a vaccine against meningitis. The method is implemented using a fermentation medium comprising casaminoacid, an optimal strategy of nutrient solution addition and an improved process for polysaccharide isolation and purification, exclusive of any chromatographic methods. The polysaccharide and protein ratio in the conjugate is in the range of 0.2 to 0.6. Inventions allow to obtain purified serogroup X Neisseria meningitidis polysaccharide in a yield of 300 to 550 mg/l, average molecular weight of 400 to 550 kDa, yield of 60% to 65% at the purification stage and containing less than 0.5% of protein, less than 0.5% of nucleic acids and less than 5 EU/mg of endotoxins. X polysaccharide is adjusted to a size of 150 to 200 kDa and conjugated to a carrier protein.EFFECT: increased efficiency.9 cl, 4 dwg, 11 tbl
ethod for producing 1,4-cis-polybutadiene // 2626967
FIELD: chemistry.SUBSTANCE: method involves the polymerization of butadiene in a hydrocarbon solvent medium in the presence of a catalytic complex. The catalytic complex consists of a rare earth metal compound with the serial number 57-71 of the periodic system, an organoaluminium compound, a conjugated diene and a halogen-containing compound. Polymerized butadiene interacts with a modifier, a tin-containing compound. The modifier is fed to the polymerisate upon achievement of the monomer conversion of 87 to 95% and subjected to preliminary intensive mixing with the polymerization stream in a static flow mixer providing a degree of homogenization of, at least, 90%. After that, the resulting solution is further stirred in a subsequent reactor for 0.5-2 hours at a temperature of 62-80°C. At the end, the polymer is isolated and dried.EFFECT: obtaining polybutadiene with a narrow polydispersity, high viscosity according to Mooney and the content of 1,4-cis units with improved physical-mechanical performance of rubber.20 cl, 2 tbl, 23 ex
Polymerisation method // 2626962
FIELD: chemistry.SUBSTANCE: method of polymerization of the monomer in the polymerization system is described. It consists of at least one component attached thereto, which is washed with the wash medium, which is supplied to the polymerization system. First, mentioned component is washed with a first washing medium and then with a second washing medium that differs in composition from the first washing medium. First and second flushing mediums are first and second flushing gases. The flushing gas comprising the olefin monomer, is used when the performance of the polymer is higher than 10 T/h.EFFECT: prevention of polymer accumulation in the reactor connection zone with other systems, prevention of polymerization mixture contact with seals and similar parts.15 cl, 1 ex
Simple polyesters of complex polyefirpoliols and their application for obtaining hard polyurethanes // 2626960
FIELD: chemistry.SUBSTANCE: polyester of a polyester polyol is described, it has a reaction product of a1) between 20 and 50 wt % of one or more polyols with an average functionality of 2.5 to 8, a2) 5 to 30 wt % of one or more monoesters of fatty acids, a3) 35 to 50 wt % of one or more alkylene oxides having from 2 to 4 carbon atoms, characterized in that the polyols of component a1) are selected from the group consisting of sugars, pentaerythritol, sorbitol, trimethylolpropane, glycerol, ethylene glycol, propylene glycol and water; fatty acid monoester of component a2) is selected from the group consisting of monoesters of oleic acid, stearic acid, palmitic acid and linolenic acid; and the polyether polyester polyol has an OH number of 200 to 700 mg KOH/g. A process of preparation of rigid polyurethane foams in the presence of the above polyether of polyester polyol is also described. A polyol mixture is described for the preparation of rigid polyurethane foams comprising the above polyester of polyester polyol.EFFECT: preparation of a polyol component for the production of rigid polyurethane foams having high solubility for physical foaming agents and being phase-stable.11 cl, 2 tbl, 11 ex

ethod of prevention of the desactivation of metal catalysts in the processes of catalytic polymerization // 2626897
FIELD: chemistry.SUBSTANCE: invention relates to a method of preventing the deactivation of a metal catalyst during the catalytic polymerization of polymeric binders which are present at the same pyrithione biocides of zinc pyrithione. During the catalytic polymerization, the suitable salt Zn is added, Zn selected from fatty acid salts; wherein the Zn salt is added in an amount of salt in a weight ratio of Zn and pyrithione biocide in the range from 3:1 to 20:1.EFFECT: prevention of catalyst deactivation.15 cl, 2 dwg, 2 tbl, 1 ex
anufacturing method of isolated tubes with improved properties // 2626895
FIELD: technological processes.SUBSTANCE: method includes a polyurethane system introducing into the annular gap formed between the inner and outer tubes, foaming and allowing the polyurethane system to cure. The polyurethane system comprises at least one isocyanate component (a), at least one polyol mixture (b) comprising a crosslinking agent (b3) constituting glycerin and at least one catalyst. The start time of the polyurethane system is less or equal to the filling time. In this case, the noted catalyst is an amine corresponding to the general formula (I) R1R2N(CR3R4)n-X, where R1, R2, R3, R4, n and X have the following values: R1, R2 independently of one another represent an alkyl residual with 1-8 carbon atoms, R3, R4 independently of each other represent hydrogen atoms, alkyl residuals with 1-8 carbon atoms, n is an integer from 1 to 6, and X is OR5 or NR6R7, where R5 is an alkyl radical with 1-8 carbon atoms or a heteroalkyl residual with 1-8 carbon atoms, R6 independently of the other hydrogen atoms, an alkyl residual with 1-8 carbon atoms, R7 an alkyl residual with 1-8 carbon atoms or a heteroalkyl residual with 1-8 carbon atoms.EFFECT: process of the invention makes it possible to obtain tubes having a reduced total bulk density and low thermal conductivity having thicker insulating layers and to simplify the production of longer pipe sections.11 cl, 2 tbl

ethod of continuous diene elastomer synthesis // 2626880
FIELD: chemistry.SUBSTANCE: method of continuous diene elastomer synthesis is characterized in that it comprises the following simultaneous steps: a) continuous introducing into the polymerization reactor equipped with a gas phase and equipped with, at least, one agitating means and a discharge device, at least: i. one or more monomers to be polymerized, of which, at least, one monomer is a conjugated diene, and ii. from 0 to 70 wt % of the organic solvent based on the total weight of the monomers and solvent, b) continuous polymerizing the monomer or monomers, c) stirring the polymerization medium by continuous moving, at least, one agitator around the axis of rotation, d) continuous discharging the elastomeric mass at the exit from the polymerization step, e) continuous supplying the unloaded elastomeric mass to the cutting device and cutting it into particles of elastomeric mass, f) removing solvent from the elastomeric particle mass and g) removing diene elastomer of the particles produced in the previous step. The method is characterized in that: (1) the degree of conversion is, at least, 60% within the first third of the reaction volume of the polymerization reactor, wherein the volume of the polymerization reactor is understood as the volume present in the reactor between the reactant entry point and the reactor outlet, excluding the discharge device, and (2) the standard deviation of the residence time distribution function in the polymerization reactor is greater than the mean residence time divided by 2√3. An installation for implementing the method and its application have also been announced.EFFECT: polymerization method is applicable in a medium with a solvent content of up to 70 percent, has increased productivity, which allows achieving high conversion rates without the phenomenon of expansion, is flexible in implementation.31 cl, 4 dwg, 3 ex
Dryer for self-applicable coating compositions // 2626860
FIELD: chemistry.SUBSTANCE: composition includes a dehumidifier for self-oxidizing resin composition, drying in air, and a polymer comprising unsaturated aliphatic groups. Mentioned dehydrator is prepared by mixing the manganese salt with 1, 4, 7-trisubstituted-1, 4 ,7-triazacyclononane (L). The manganese salt has the general formula Mn2+[X]n, in which the anion X is selected from PF6-, SbF6-, AsF6-, BF4-, B(C6F5)4-, Cl-, Br-, I-, NO3- or R2COO-, in this case n=2, or the anion X is SO42-, where n=1, and where R2=C1-C20 Alkyl. In this case, 1,4,7-trialkyl-1,4,7-triazacyclononane (L) is present in the mixture in such an amount that the molar ratio of Mn:L is at least 1.25:1, preferably at least 1.5:1 and less than 20:1. The coating composition, the method for coating the substrate, the substrate coated with the composition, the use of the composition in paints, glues, varnishes, inks and varnishes and the use of a mixture of 1,4,7-trialkyl-1,4,7-triazacyclononan (L) and manganese salt as a dehumidifier for self-oxidizing resin composition, drying in air.EFFECT: providing non-cobalt catalysts for coating formulations containing them, and which simultaneously provide quick-drying coatings that have significant hardness and gloss properties.14 cl, 9 tbl, 3 ex
Bitumen compositions containing additives with improved thermo-reversible properties // 2626859
FIELD: chemistry.SUBSTANCE: bitumen composition contains bitumen, the first additive containing at least one functional group of a saturated or unsaturated fatty acid ester, linear or branched, having a hydrocarbon chain of 4 to 36 carbon atoms optionally substituted by at least one hydroxyl group, and the second additive containing at least one organic gellant. The invention also relates to application of a combination of the first and second additives in a bitumen composition to reduce the dynamic viscosity of the bitumen composition or bitumen base at a temperature higher than or equal to 80°C, preferably higher than 80°C, without impairing the consistency of the said composition at operating temperatures. Finally, the invention relates to the use of these bitumen compositions in the field of road applications, in particular, in production of road binders, and in the field of industrial applications.EFFECT: improved composition properties.17 cl, 2 tbl
ethod of additive polymerization of norbornen and its derivatives // 2626745
FIELD: chemistry.SUBSTANCE: additive polymerization proceeds with the double bond opening and leads to polymers containing unchanged cyclic structures based on the substituted norbornane skeleton in the backbone. The resulting polymers are used to produce coatings in electronics, telecommunication materials, optical lenses, substrates for plastic displays, photoresistors for the production of chips and displays, dielectrics for semiconductors. The method includes polymerisation of norbornene using a catalyst produced by reacting a cationic palladium complex and boron trifluoride etherate in an organic solvent medium in the presence of norbornene. Distinctive features of the present invention are the use of the initial palladium [(acac) Pd (MeCN)2] BF4, (where acac is acetylacetonate, MeCN = acetonitrile), to which the organophosphorus ligand L is added successively (where L = triphenylphosphine, tricyclohexylphosphine, triisopropylphosphine, bis (diphenyl) phosphinomethane, bis (diphenyl) phosphinopropane, bis (diphenyl) phosphinobutane, bis (diphenyl) phosphinoferrocene) and the cocatalyst-boron trifluoride etherate (BF3⋅OEt2). The process is carried out in an organic solvent medium: mixtures of methylene chloride and toluene, with a molar ratio of ligand to palladium [L]0:[Pd]0=1:1-2:1 and with a molar ratio of boron to palladium [BF3⋅OEt2]0:[Pd]0=10: 1-80:1.EFFECT: simplifying the polymerization of norbornene derivatives.2 tbl, 14 ex
Photochromatic polymerization-approval composition, photochromic network optical material and method of its production // 2626640
FIELD: physics.SUBSTANCE: proposed composition consists of a silicate glass powder doped with copper chloride CuCl nanocrystals, a mixture of radically polymerizable compounds and a polymerization initiator. One component of the polymerizable compounds is a liquid oligomer with two (meth) acrylic groups bound by a divalent radical containing aromatic groups having at least one acid group -COOH, the refractive index of which is lower than the refractive index of said doped silicate glass.EFFECT: composition provides a photochromic mesh optical material in the absence of a solvent in a simplified technology in the form of a free film, which greatly expands the scope of this material.6 cl, 1 tbl, 1 ex
ethod of preparing binding // 2626638
FIELD: chemistry.SUBSTANCE: binder preparation is carried out in two stages: in the first phase, butadiene-styrene termoelastoplast mixed with mineral oil in mixer volumetric type at a temperature of 40-50°C until full absorption, on the second-a mineral oil impregnated polymer granules mix In a two-shaft high-shear mixer at a temperature of 70-90°C to complete the transition in the viscous State. As a mineral oil, vaseline or industrial oil is used.EFFECT: enables the improvement in performance of a quality Binder, increase in security, and the process of preparing the energy compounds.2 cl, 2 tbl
 
2550963.
Up!