RussianPatents.com
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Machine direction oriented film for labels Invention relates to a machine direction oriented polymer film for labels, use of such a film to label articles, a label liner and a label made from such a film. The polymer film has a multi-layer structure comprising core layer containing at least one polypropylene homopolymer, a polypropylene random copolymer or a polypropylene block copolymer or a mixture of two or more thereof and at least one modifier. The modifier contains 1-20 wt % hydrocarbon resin and a styrene block copolymer or an olefin block-copolymer different from the polypropylene block copolymer. |
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Method of producing polyalkylene glycol di(meth)acrylates Present invention relates to a method of producing polyalkylene glycol di(meth)acrylates. Described is a method of producing polyalkylene glycol di(meth)acrylates by reacting polyalkylene glycol with (meth)acrylic anhydride, wherein the polyalkylene glycol has weight-average molecular weight ranging from 1000 to 10000 g/mol, the reaction mixture is free of metal compounds and/or amines and solvents, the reaction is carried out in the presence of polymerisation inhibitors and the reaction temperature ranges from 70°C to 120°C and the obtained reaction mixture is treated by adding water, wherein the ratio of the weight of the treated reaction mixture to water ranges from 5:1 to 1:5. |
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Microperforated polymer film and methods of its fabrication and application Invention relates to production of microperforated polymer film. Proposed method comprises forming of polymer film consisting of opposed first and second surfaces and multiple cavities there between. Said multiple cavities open to first surface and include the cavity surface. Cavity surface crosses the first surface. Then, fluid is fed between thrust surface and first surface. Thrust surface supports said polymer film. Second surface is subjected to heat treatment to perforate said polymer film at areas that cover said multiple cavities. Article thus made represents a solid particle filter for fluids or gases. |
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Multi-step ethylene polymerisation method Invention relates to a suspension method of producing an ethylene polymer having a melt flow ratio F/P greater than 25. The method is carried out in two or more polymerisation steps at temperature of 60-120°C. At least two of the two or more polymerisation steps are carried out at different concentration of a chain-terminating agent. The method is carried out in the presence of a catalyst system containing a product obtained by contacting a solid catalyst component and an organoaluminium compound. The solid component contains Ti, Mg and halogen and has porosity (PF) measured by a mercury method, and owing to the presence of pores with a radius equal to or less than 1 mcm, of at least 0.3 cm3/g, and surface area of less than 100 m2/g. Particles of the solid component have a spherical morphology and average diameter of 8-35 mcm. |
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Improved procatalyst composition and method for production thereof Invention relates to olefin polymerisation catalysts. Disclosed is a method of halogenating an olefin polymerisation procatalyst precursor which involves halogenating a procatalyst precursor in the presence of a substituted aromatic phenylene diether at temperature ranging from about 90°C to less than or equal to about 100°C. The aromatic phenylene diether has the structure , |
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Fire-retardant phosphorus-sulphur additives and polymer systems containing same Present invention relates to phosphorus-sulphur compounds with fire-retardant properties, of formula: , where X denotes oxygen, T denotes sulphur, each X' independently denotes oxygen or sulphur, n is the valence of A and equals at least 2, A denotes an organic binding group, as well as a method of producing a foamed polymer, which involves formation of a molten mixture of a combustible thermoplastic or thermosetting polymer, at least one foaming agent and said phosphorus-sulphur compound under pressure, and then extruding the molten mixture through a nozzle in a region of low pressure such that the molten mixture expands and cools to form a foamed polymer. |
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Catalyst for hydrogenation of unsaturated compounds Invention relates to a homogeneous catalyst for hydrogenation of unsaturated compounds. The catalyst has the general formula: (R1Cp)(R2Cp)Ti(PhOR3)2, where Cp relates to cyclopentadienyl; R1 and R2 are identical or different alkyl groups (C3-C10); Ph relates to a phenyl group, OR3 is an alkoxyl group (C1-C4). The invention also discloses use of the catalyst for hydrogenating a polymer containing unsaturated bonds, and a method of hydrogenating polymers containing unsaturated bonds. |
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Invention relates to formulations of liquid "hybrid" hydroxylamine curing agents for urethane prepolymers with terminal isocyanate groups, used in producing sprayed thick-layer polyurea-urethane coatings designed for corrosion protection of metal pipes, moulded coupling components, stop valves of compressor and pump stations, mounting assemblies main and field oil and gas pipelines, reservoirs for underground storage of liquefied gas and oil storages in factory or route coating conditions during construction, reconstruction and overhaul repairs. The composition of the curing agent includes the following components: 3,3'-dichloro-4,4'-diaminodiphenylmethane as an aromatic diamine, polyoxypropylenetriol with molecular weight of 5000 units as oligoether polyol, polydiethylene glycol adipate with molecular weight of 800 units as oligoester polyol, N,N'-tetraoxypropylene ethylenediamine with hydroxyl number of 640-800 mgKOH/g as oxypropylated ethylenediamine, black dye Nigrosin as a fat-soluble pigment. |
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Filling compound for fireproof glazing Filling compound for fireproof glazing contains epoxy resin Epoxy-520, a plasticiser - tricresyl phosphate, a fire-retardant - triphenyl phosphate and a curing agent - triethylene tetramine. |
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Polyamide-based composite polymer antifriction material Invention relates to mechanical engineering and particularly to a polyamide-based composite polymer antifriction material used to make articles for different tribological purposes, e.g. friction bearings, and for making articles for the braking system of rail passenger or cargo transport. The polyamide-based composite polymer antifriction material contains fibre filler in the form of carbon fibre or a mixture of carbon fibre and glass fibre. The composite polymer antifriction material further contains randomly arranged carbon nanotubes in form of single-layer or multilayer, with 2-70 layers, or interleaved, rolled graphite planes with 2-70 layers. The external diameter of the carbon nanotubes ranges from 0.1 to 100 nm and their length ranges from 1 to 70 mcm. The polyamide of the base of the composite polymer antifriction material used is polyamide 6 or Caprolon V or Ertalon. Content of glass fibre in the mixture thereof with carbon fibre of the fibre filler of the composite polymer antifriction material ranges from 3.48 to 10.5 wt %, with the following quantitative content of components, wt %: carbon fibre or mixture of carbon fibre and glass fibre 9.7-42.4, carbon nanotubes 0.05-0.55, polyamide - the balance. The carbon fibre in the composite material is carbon fibre made from high-molecular weight hydrated cellulose fibre or from polyacrylonitrile fibre. The carbon fibre of the composite polymer antifriction material is used in form of bundles or chopped bundles or chopped tape, and the glass fibre is used in form of chopped threads. The length of the chopped bundles or tape of the carbon fibre and chopped threads of the glass fibre ranges from 1 mm to 48 mm. The technical result is longer service life of articles made from the disclosed polyamide-based composite polymer antifriction material, low intensity of linear wearing in case of friction on a polished steel pair made of steel 40X. |
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Invention relates to use of a stabilised composition based on an ethylene homo- or copolymer containing a combination of at least two sterically hindered amine compounds for making plastic articles for transportation and storage of esters of vegetable oil, preferably plastic fuel tanks for motor vehicles, including single-layer or multi-layer articles. At least one of the sterically hindered amine compounds is selected from compounds having the chemical formula: |
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Bitumen-concrete mixture on nano-modified binder Bitumen-concrete mixture contains crushed rock, sand and oil bitumen BND 90/130, nano-modified with a mechanically activated mixture of rubber crumbs with an additive, where the bitumen is modified using rubber crumbs with size of 0.25 mm and the additive is natural zeolite, with the following ratio of ingredients, wt %: said bitumen 93.0 of the weight of the rubber-bitumen mixture, said crumbs 7.0 of the weight of the rubber-bitumen mixture, natural zeolite 2.0 of the weight of the rubber crumbs. |
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Method of producing sulphated arabinogalactan derivatives Method involves reacting arabinogalactan with a sulphating complex while continuously stirring and heating. The sulphating complex used is a sulphamic acid-urea complex. Said complex is obtained by mixing equimolar amounts of sulphamic acid and urea in dioxane. Sulphation of arabinogalactan is carried out at temperature of 80-95°C and hydromodulus of 1:10 for 2.5-3.5 hours. The ratio of arabinogalactan to the sulphating complex is 1:13-25 (g:mmol). The product is separated by neutralisation and precipitation in ethyl alcohol. |
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Waterproof polymer-bitumen emulsion compound Compound contains oil bitumen BND 60/90, butadiene-styrene polymer DST 30-01, Tamin T4 emulsifier, finely ground mineral filler in form of wet magnetic separation wastes which are ground in advance and water. Components are in the following ratio, wt %: oil bitumen BND 60/90 - 49-51; polymer DST 30-01 - 6; Tamin T4 emulsifier - 2.5; mineral filler - 10-13; water - the balance. |
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Claimed invention relates to a method of obtaining heterogeneous mixture used in the paper industry. Described is the method of manufacturing heterogeneous mixture of polymers, including: (a) introduction into a solution of the first portion of a polymerisation initiator and one or several anionic or cationic monomers, with monomers carrying the same charge; (b) introduction into the solution of the second portion of the polymerisation initiator and one or several non-ionic monomers; (c) introduction of the third portion of the polymerisation initiator and one or several ionic monomers, whose charge is opposite to the charge of monomers from (a); (d) gradual introduction of the fourth portion of polymerisation initiator for a reaction of any remaining monomer with formation of a heterogeneous mixture of polymers; and (e) in case of necessity neutralisation of the obtained heterogeneous mixture of polymers, with anionic monomers being selected from the group, consisting of: (1) acrylic acid, (2) methacrylic acid, (3) styrene sulfonic acid, (4) vinyl sulfonic acid, (5) acrylamido methylpropane sulfonic acid and (6) their mixtures; cationic monomers are selected from the group, which includes: (1) diallyldimethylammonium chloride, (2) acryloylethyl trimethylammonium chloride, (3) methacryloylethyltrimethylammonium chloride, (4) acryloylethyltrimethylammonium sulfate, (5) methacryloyl ethyltrimethylammonium sulfate, (6) acrylamidopropyltrimethylammonium chloride, (7) methacrylamidopropyl trimethylammonium chloride, (8) non-quaternised forms (2)-(7), (9) vinylformamide (further hydrolised into vinylamine) and (10) their mixtures, and non-ionic monomers are selected from the group, consisting of: (1) acrylamide, (2) methacrylamide, (3) N-alkylacrylamide, (4) vinylformamide and (5) their mixtures. Also described is the heterogeneous mixture of polymers, intended for increasing the content of a filling agent in paper or carton, obtained by the method described above. Methods of increasing the content of the filling agent in a paper or carton sheet with application of the said heterogeneous mixture of polymers are described. |
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Invention relates to compounds based on thermoreactive resins and can be used for soaking and sealing of condensers, windings of transistors, transformers in different branches of industry. An epoxy compound includes, wt. p.: an epoxy diane resin ED-20 - 100, a polyamide hardener PH-300 - 40, a modifier trichloroethylphosphate - 30, a structuring additive - potassium polytitanate K2O·nTiO2 at n=4, 5, 6 - 0.1-0.5. |
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Invention relates to latex compositions, which are applied in coatings for paper. A latex binding agent for coating of pigmented paper contains particles of emulsion copolymer, which contains (i) from 15 to 35 wt % of repeated links, obtained by acrylonitrile polymerisation; (ii) from 25 to 65 wt % of repeated links obtained by polymerisation of conjugated diene monomer, and (iii) from 5 to 55 wt % of repeated links, obtained by polymerisation of alkenyl aromatic monomer, counted per the total weight of the repeated links in a particle. |
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Corn-steep extract purification and concentrating method Corn-steep extract purification and concentrating method envisages stages of fine purification, sterilisation, preliminary concentrating and additional concentrating. The extract purification is performed through membranes with 0.2 and 0.45 mcm pore diameter or coarse-pored ultrafiltration membranes with rating in terms of molecular weight equal to 150-170 kDa. Deep concentrating till dry substances concentration equal to 25-30% is performed through highly selective reverse osmosis membranes with selectiveness equal to 99.5-99.8% under a pressure up to 100 MPa. The final concentrating till dry substance content equal to 55-65% is performed in a vacuum-evaporator installation. |
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Invention relates to homo- and cooligophenolformaldehyde phthalimidine-containing novolacs based on 2-(β-hydroxyethyl) 3,3-bis(4'-hydroxyphenyl)phthalimidine, stable in the process of production, storage and processing, as well as to a method of their obtaining. In the process of solidification of novolacs with urotropin, as well as compounds, which contain hydroxymethyl groups (hydroxymethyl compounds of phenols, phenolformaldehyde resoles) obtained are cross-linked phthalimidine-containing copolymers with high strength parameters (transverse rupture stress and specific impact strength reaches values of 69.0 mPa and 3.4 kJ respectively) and thermal characteristics (temperatures, at which 10 and 20% loss is observed, reach values of 430 and 490°C respectively). |
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Elastomeric body with elastic flame-retardant coating Invention relates to elastomeric body suitable to be used in anti-vibration appliances and suspensions. Elastomeric body (1) has at least one layer of elastic and flexible flame-retardant coating covering part of the body (1). At least one layer of flame-retardant coating is non-halogenated and contains flame-retardant substance and elastic binding substance. Flame-retardant substance of one layer contains expandable graphite. Elasticity of at least one layer of coating exceeds 20%. |
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Invention relates to a polyolefin composition with improved dielectric strength of insulation, to a wire or cable, in particular to a cable of middle, high or superhigh voltage, which includes such composition, as well as to application of such composition for production of wire or cable, in particular a cable of medium, high and superhigh voltage. Polyolefin composition contains polyolefin (A) and benzyl derivative (B) of a certain structure. Benzyl derivative (B) is used in the polyolefin composition as an additive for stabilisation of dielectric strength. |
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Composite material for manufacturing protective clothes Invention relates to the field of production of composite protective rubberised materials used for manufacturing protective clothes, and respiratory protection equipment for people, including self-rescuers, breathing bags of isolating gas masks. A composite material contains chlorosulphonated polyethylene, polychloropren, kaolin, titanium dioxide, a nanodisperse filling agent montmorillonite, modified with quaternary ammonium salts, chloroparaffin-470, antimony trioxide, decabromodiphenyl oxide, magnesium oxide, zinc oxide, thiuram D, captax, rosin, benzene and ethylacetate mixture and polyether or cotton-polyether, or viscose-polyamide. |
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Composition of thermally solidified powder coating Invention relates to a thermally solidified powder coating, a method of its obtaining, application of the powder coating composition for its application on a substrate, the substrate, covered with the powder coating composition, and a method of applying coating on the substrate with application of the powder coating composition. The powder coating composition contains resin with reactive unsaturation, in which all the said unsaturation represents double bonds carbon-carbon, directly bound with an electron-acceptor group, a system of thermal initiation, which contains a transition metal-based catalyst and peroxide, and a common cross-linking agent. Peroxide is selected from peroxyethers, monoperoxycarbonates and their mixtures, and the common cross-linking agent is selected from vinyl ethers, vinyl esters, vinylamides, itaconates, enamines and their mixtures. The amount of the thermal initiation system is selected in such a way that when the powder coating composition is applied on the substrate and solidified at a temperature of 130°C for 20 minutes the coating with resistance to acetone, equal to at least 50 double steps in wear, is obtained. |
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Method of obtaining poly-para-dioxanon Described is a method of obtaining poly-para-dioxanon in a monomer mass under the action of tin (II) octanoate in the presence of a co-initiator, which are introduced in the form of a solution in an organic solvent; the solvent is removed by vacuumisation, polymerisation is carried out with heating in nitrogen atmosphere; the obtained polymer is cooled, crushed and purified from the residual monomer; characterised by the fact that as the co-initiator used are glycidyl ethers and esters, benzene is used as the solvent, removal of the solvent is carried out at room temperature and pressure not more than 0.5 mm Hg, polymerisation is performed in a thin layer at 80°C, the polymer is cooled to room temperature and purified from the residual monomer by the monomer distillation under pressure of 0.1-0.5 mm Hg at 80°C for 12 hours or re-precipitation. |
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Claimed invention relates to block-copolyether formals. Described are the block-copolyether formals of formula |
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Claimed invention relates to aromatic block-copolyethers. Described are the aromatic block-copolyethers of formula: , where n=1-20; m=2-50; z=2-30. |
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Polymer composition and method of plastic bottle production by two-stage injection-blowing Invention relates to polymer composition and method of plastic bottle production by two-stage injection-blowing. Plastic bottle is produced by drawing at second stage, separated in time and space, after heating to 115°C-135°C, from the blank with 2.1-2.9 mm thick walls at forming with blowing and drawing axially and radially. Blank is produced at first stage by injection moulding or by injection moulding with additional injection of polymer composition. Note here that said polymer composition contains at least 60 wt % of HDPE that features density of 0.941-0.965 g/cm3 and first melt index at 190°C/2.16 kg of 0.1-0.9 g/10 min, to 40% of calcium carbonate as a filler and to 4% of dye based on titanium oxide and/or zinc sulphide. Note here that said HDPE represents mono- or multimodal HGPE with second melt index at 190°C/21.6 kg making 5 g/10 min to 50 g/10 min. |
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Polyether products formed in melt phase and method of producing thereof Invention relates to polyether polymers. Described is a polyether polymer, which includes at least one polyethylene terephthalate polyether, at least one compound, containing an alkali metal and aluminium; and from 5 to 350 parts per mln of at least one phenolic stabiliser in a combination with a phosphoric acid, where the compound, containing the alkali metal and aluminium, represents at least one of the compounds, containing lithium and aluminium, and where the phenolic stabiliser represents pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]. Also described are versions of the polyether polymer, including (a) at least one polyethylene terephthalate polyether, which includes (i) a residue of at least one carboxylic acid, where at least 90 mol% of the said residue are the residue of a terephthalic acid, relative to 100 mol% of the residue of at least one acid component, (ii) a residue of at least one hydroxyl component, where at least 90 mol% of the said residue are the residue of ethylene glycol, relative to 100 mol% of the residue of at least one hydroxyl component, and (iii) up to 10 ml% of the residue, selected from the residue of an isophthalic acid, residue of a naphthalenedicarboxylic acid, diethylene glycol residue, residue of 1,4-cyclohexanediole and residue of their derivatives, (b) at least one compound, containing lithium and aluminium; and (c) from 200 to 300 parts per mln of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] in the combination with the phosphoric acid. A product, including at least one polyether polymer, described above, is described. Described is a method, realised in a melt phase in order to obtain the polyether polymer product in the melt phase, which includes obtaining a suspension, which contains at least one glycol, selected from ethylene glycol and ethylene glycol derivatives, as well as minimum one acid, selected from the terephthalic acid and terephthalic acid derivatives, an addition from 5 to 350 parts per mln of at least one phenolic stabiliser, selected from pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and the phosphoric acid; and realisation of interaction of the said at least one glycol and the said at least one acid in the presence of at least one catalyst, selected from the catalyst, containing the alkali metal and aluminium, where the catalyst is selected from lithium-aluminium-containing catalysts. |
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Epoxy binding agent, based on it prepreg and product made of it Invention relates to the field of creating epoxy binding agents for polymer composite materials (PCM) for construction purposes on the basis of carbon filling agents, which can be used in aviation, aerospace industry, radioelectronics and other fields of technology. An epoxy binding agent includes, wt %: an epoxy resin with three and more functional groups 39.70-45.00, based on an aromatic amine-4,4'-diaminodiphenylsulfone hardener 13.21-19.20, a catalyst of hardening - a complex compound of boron trifluoride with benzylamine 0.20-0.24, an organic solvent - 39.78-45.00. Claimed is prepreg, which includes the said epoxy binding agent and a fibrous filling agent - carbon braids, tapes, tissues with the following component ratio, wt p.: the said epoxy binding agent 25-50, the said fibrous filling agent 50-75. Claimed is a product, produced by moulding of the said prepreg. The invention makes it possible to create the epoxy binding agent and prepreg of higher viability and heat resistance, with reduced modes of hardening and thermal processing. |
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Method of obtaining water-insoluble sulphur-containing chitosan-based biomaterial Invention relates to the field of organic synthesis. A method of obtaining a water-insoluble sulphur-containing chitosan-based biopolymer includes interaction of chitosan with a thiomethylating agent, preliminarily obtained by saturation of a formaldehyde solution with gaseous H2S, with molar ratio chitosan: formaldehyde: hydrogen sulphide 1:6:4, at a temperature of 60°C for 20-25 hours. |
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Method of producing amino plastic aqueous dispersion Method of producing an amino plastic aqueous dispersion involves obtaining a dispersion by preparing a concentrated 50-70% urea solution or a mixture of urea and melamine with formaldehyde in molar ratio 1:2.0-2.2; holding the reaction solution while stirring for 50-60 minutes at 50-70°C and pH 7.0-8.0; adding a new portion of urea to final ratio of 1:0.8-1.3; holding for 10-20 minutes; adding 0.01-0.5 wt % stabiliser in form of aqueous solutions of methyl cellulose or derivatives thereof; acidifying to pH 5.0-6.0; mixing at 50-70°C for 10-30 minutes until loss of solubility, cooling and neutralising the system. To obtain dispersions in form of solid particles of a cured polymer, the dispersion system is continuously stirred at 40-50°C and pH 3.0-4.0 for 1-2 hours until a loose powder is obtained. |
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Rubber mixture for sidewall reinforcing layer or for sidewall and tire Invention relates to rubber mixture for sidewall reinforcing layer or for sidewall of self-supported tire. Rubber mixture for sidewall reinforcing layer or for sidewall includes diene rubber, containing 10 to 80 mass% of butadiene rubber, and coal tar pitch carbon fibre. |
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Composition for producing hydrophobic fire- and water-resistant films contains aqueous solution of polyvinyl alcohol, formaldehyde and an acid curing catalyst - phosphoric acid, a dispersion of solid amino plastic particles based on products of condensation of formaldehyde with urea in form of fine particles of a urea-formaldehyde resin, with overall molar ratio of the mixture of amines to formaldehyde of 1:0.8-1.3, diethanolamine, a water repellent in form of a 50% aqueous dispersion. In a second version, the composition contains a mixture of carbamide with 10-30% melamine besides formaldehyde. |
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Polymer composition based on organic filling agent for manufacturing products Invention relates to production of organofilled polymer compositions and can be used in production of construction materials, motor industry and furniture industry. A polymer composition based on an organic filling agent for manufacturing products contains the organic filling agent with particle size from 1 to 20000 mcm and humidity from 0 to 50 wt %, a highly-molecular compound with melting temperature from 4 to 400°C, target additives, a modifying additive in the form of nanosized particles, with nanotubes, nanofibres, nanodiamonds being applied as the latter. |
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Application of mediators in production of wood-fibre boards Invention relates to wood and/or composite wood materials, in particular to wood-fibre boards, widely used as an initial material in many processing industries. Described is application of a material, selected from the group of phenol derivatives of formula IV, V, VI and their mixture as a mediator in production of lignocellulose-containing moulded articles, in particular the wood-fibre and/or composite materials. Especially preferable materials in the group of phenol derivatives of formula IV are: acetosyringone with R1, R2, R3 = methyl, and syringaldehyde with R1, R2 = methyl, R3 = H; in group of formula V - acetovanilone with R1, R2 = methyl, R3 = H, vanillin with R1 = methyl, R2, R3 = H and ethyl vanillin with R1 = ethyl, R2, R3 = H; in group of formula VI - methylsyringate with R1, R2=methoxy, R3=methyl and vanillic acid with R1, R3=H, R2=methoxy. The said material is applied together with, at least, one phenol-oxidising enzyme with ratio, equal ≥ 0.5 unit/ml of enzyme per 1 mmol of the mediator to ≤ 40 unit/ml of enzyme per 1 mmol of the mediator. Also described is a method of manufacturing the lignocellulose-containing moulded articles with application of the said material and the moulded article obtained thereby. |
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Invention relates to chemistry of polymers and deals with solidified under environmental conditions water-based coatings for surfaces allowing writing and erasing. A composition contains an isocyanate resin component and an acrylic polyol resin component. The composition is solidified with formation of a material, which has a surface allowing writing and erasing. The marking material can be erased from the surface allowing writing and erasing without any trace after performing more than 100 cycles of writing and erasing on the same place. |
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Invention can be used in production of paper, paints and plastics. A method of obtaining calcium carbonate with a surface subjected to reaction processing in water medium includes a) supply of at least one type of ground natural calcium carbonate (GNCC); b) supply of at least one water-soluble acid; c) supply of gaseous CO2; d) contact of the said GNCC with the said acid and CO2. The said acid of stage b) has pKa higher than 2.5 and lower or equal to 7, measured at 20°C, connected with ionisation of the first available hydrogen, and respective anion, formed with a loss of the said first available hydrogen, capable of forming water-soluble calcium salts. After the contact of the said acid with GNCC supplied is at least one water-soluble salt, which has pKa higher than 7, measured at 20°C, connected with ionisation of the first available hydrogen. The salt anion is capable of forming water-insoluble calcium salts, with cation of the said water-soluble salt being selected from the group, consisting of potassium, sodium, lithium and their mixtures. The anion of the said water-soluble salt is selected from the group, consisting of phosphate, dihydrophosphate, monohydrophosphate, oxalate, silicate, their mixtures and hydrates. |
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Composition for manufacturing an automobile material with a melt flow rate MFR2 (230°C) in the range from 10 to 50 g/10 min, which contains two heterophase polypropylenes, including a propylene homopolymer-based matrix and elastomer copolymer, plastomer and a mineral filling agent. Heterophase polypropylenes possess different rates of melt flow: the first heterophase polypropylene with a melt flow rate MFR2 (230°C) in the range from 3.0 to 30.0 g/10 min and the second heterophase polypropylene with weight content of substances soluble in cold xylol (XCS) in the range from 7.0 to 20.0%. |
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Processing aid for thermoplastic polyurethanes Invention relates to a processing aid, which is used in processing of thermoplastic polyurethanes, as well as to its obtaining and application in processing of thermoplastic polyurethanes into self-supporting films. The processing aid contains, wt %: hydrophobised, at least, partly aggregated metal oxide particles of pyrogenic origin, selected from the group, including aluminium oxide, silicon dioxide and mixtures of the said metal oxides 10-50, one or several thermoplastic polyurethanes 20-75, one or several isocyanates 0.5-25, one or several compounds, possessing an action of anti-adhesive or dispersing auxiliary substances 0.5-15. Also described are: a method of obtaining the processing aid and a method of manufacturing the self-supporting film, which includes dosing into an extruder a mixture of thermoplastic polyurethane and the processing aid, used in an amount from 0.5 to 35 wt % counted per the total amount of thermoplastic polyurethane, mixture melting and extrusion through a head for film extrusion with obtaining the film. |
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Method of colouring poly(meth)acrylates by water-based liquid dyes and water-based liquid dyes Invention relates to a water composition with a colouring substance for colouring thermoplastic moulding masses. The composition contains, wt %: from 1 wt % to 49 wt % of modified polyacrylate, including links of alpha-methylstyrene, 2-ethylhexylacrylate and methacrylate of methoxypolyethylene glycol in the form of water solution with concentration from 48 wt % to 52 of polyacrylate, from 0.5 wt % to 50 wt % of the colouring substance or a mixture of colouring substances and completely desalinated water. |
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Method of obtaining precipitated calcium carbonate Invention can be used in the chemical industry. A method of obtaining a precipitated calcium carbonate product includes the following stages: (a) formation of a water suspension of precipitated calcium carbonate grains by carbonisation of Ca(OH)2 suspension in the presence of 0.005-0.03 mol Sr in the form of Sr(OH)2 per mol of Ca(OH)2 and (b) formation of the water suspension of the precipitated calcium carbonate product by carbonisation of Ca(OH)2 slurry in the presence of 0.5-5% of dry weight of the precipitated calcium carbonate grains. The precipitated calcium carbonate grains have D50, which is lower than D50 of the precipitated calcium carbonate product. The precipitated calcium carbonate grains also have a content of aragonite polymorph higher or equal to its content in the precipitated product - calcium carbonate. |
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Polymer nanocomposite with controlled anisotropy of carbon nanotubes and method of obtaining thereof Invention relates to the field of polymer materials science and can be used in aviation, aerospace, motor transport and electronic industries. Nanotubes are obtained by a method of pyrolytic gas-phase precipitation in a magnetic field from carbon-containing gases with application of metals-catalysts in the form of a nanodisperse ferromagnetic powder, with the nanotubes being attached with their butt ends to ferromagnetic nanoparticles of metals-catalysts. Magnetic separation of the powder particles with grown on them nanotubes, used in obtaining a polymer-based composite material, is carried out. After filling with a polymer, a constant magnetic field is applied until solidification of the polymer takes place. The material contains carbon nanofibres and/or a gas-absorbing sorbent, for instance, silica gel, and/or siliporite, and/or polysorb as a filling agent. |
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Method of purifying non-modified montmorillonite-based bentonite Method of purifying non-modified montmorillonite-based bentonite includes primary preparation of raw material, which includes sieving bentonite powder obtained from a open pit, primarily consisting of montmorillonite, from coarse mechanical inclusions, dispersing the bentonite powder in an aqueous medium using a high-speed colloidal mill, further chemical treatment in containers with overhead mixers, treatment in a system of hydrocyclone apparatus and vibratory sieves, treatment in a high-speed drum-type centrifuge, treatment in drying modules and grinding the finished product - non-modified pure montmorillonite-based bentonite or treatment in drying modules and grinding the finished product with preliminary further chemical treatment of pure bentonite in a Z-shaped mixer equipped with an evacuation module. Treatment of the bentonite powder is carried via cation-exchange reactions using phosphates, e.g. sodium phosphate and sodium polyphosphates such as sodium tripolyphosphate, which is a trimer of an orthophosphoric acid salt Na5P3O10. |
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Catalyst on silica-clad alumina support Invention relates to catalysis. Described is an olefin polymerisation catalyst comprising: (I) a clad catalyst support comprising (a) a core which comprises alumina particles and (b) about 1-40 wt % silica, based on the weight of said cladding of the clad catalyst support on the surface of said core; said clad catalyst support having a BET surface area of not less than 20 m2/g; porosity of at least about 0.2 cm3/g; and a normalised sulphur uptake (NSU) value of up to 25 mcg/m2; and (II) 0.1-10 wt % , based on the weight of said catalyst, of catalytically active, with respect to olefin polymerisation, elemental transition metal, compound thereof, or complex thereof, wherein said transition metal is selected form Fe, Cr, Ti, Zr, Hf, Ni or mixture thereof, on the surface of said clad catalyst support. Methods of producing said catalyst and use thereof are described. |
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Films based on cross-linked polymers and articles made therefrom Invention relates to heat sealable films, laminated materials, membranes or other polymer articles based on cross-linked polymers, having rubber-like heat resistance (heat deformation) and dimensional stability at temperature higher than the melting point of the polymer, while maintaining properties of the compound obtained by heat sealing (heat-adhesive compound). The heat sealable film contains at least one layer formed from a composition containing A) at least one polymer selected from a group comprising i) an ethylene-based polymer, ii) an ethylene/α-olefin/diene interpolymer and iii) a polymer based on a C4-C10 olefin, and B) at least one polymer selected from a group consisting of a propylene/ethylene interpolymer and a propylene/α-olefin interpolymer. Said film is cross-linked using radiation and/or chemical reagents. |
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Polymer composition for cable plastic Polymer composition for cable plastic includes polyvinyl chloride, dioctyl phthalate, diphenylol propane, aerosil, tribasic lead sulphate and a stabiliser. The composition is characterised by use of a complex stabiliser - plasticiser, which is a product containing calcium stearate, magnesium stearate and zinc stearate in molar ratio 2:2:1, with acid number of not greater than 5 mg KOH/g in a medium of chlorinated paraffin wax KHP-30 in weight ratio of 1:6, respectively, and additionally agidol and chalk, with the following ratio of components, pts.wt: polyvinyl chloride 100; dioctyl phthalate 37-47; diphenylol propane 0.1; tribasic lead sulphate 3-5.7; agidol 0.08; chlorinated paraffin wax KHP-30 2-14; chalk 11; aerosil 0.7; said stabiliser-plasticiser 0.33-2.33. |
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Method of producing polyester polyols with low content of secondary dioxane Invention relates to a method of producing polyester polyols, use thereof and use of, as well as use of polyurethane (PUR) and polyisocyanurate (PIR) foam which contains polyester polyol, and a metal composite element which contains PUR and PIR foam. The method of producing polyester polyols involves mixing (A) at least one carboxylic anhydride, (B) diethylene glycol, (C) at least one glycol with 2-4 carbon atoms and (D) at least one an aliphatic dicarboxylic acid with 5-12 carbons. The molar ratio of components (B) and (A) is in the range from 1.5:1 to 1.1:1. The weight ratio of components (A) and (B), with respect to the weight of all components in the mixture, is in the range from 66 wt % to 95 wt %. |
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Fire-retardant mixture of halogenated phenyl esters Invention can be used as an ignition inhibitor for various systems of polymer resins. The fire-retardant mixture includes at least a first and a second halogenated non-polymer phenyl ether of general formula (I), where X independently represents Br, each m independently represents an integer from 1 to 5, each p independently represents an integer from 1 to 4, n is an integer from 1 to 5, and where values of n are different for the first and second ethers. The polymer fire-retardant composition includes a combustible macromolecular material and a fire-retardant mixture. |
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Method of producing oligo- and polyethylene terephthalates Described is a method of producing oligo- and polyethylene terephthalates, which involves polycondensation of terephthalic acid and ethylene glycol in the presence of a diantimony trioxide catalyst while heating, the method being characterised by that a polyfluorinated alcohol is further added when mixing the ingredients, said alcohol being selected from 1,1,3-trihydroperfluoropropanol-1, 1,1,5-trihydroperfluoropentanol-1, 1,1,7-trihydroperfluoroheptanol-1 and 1,1,9-trihydroperfluorononanol-1, in situ reaction with diantimony trioxide of which produces a cocatalyst of formula: Sb(OCH2(CF2CF2)nH)3 n=1-4. |
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Films made from heterogeneous ethylene/alpha-olefin copolymer Invention relates to a multilayer film for making a finished article and a finished article having said film. The multilayer film includes at least two layers. The first layer includes a first a copolymer of ethylene and at least one alpha-olefin. The first copolymer has density of less than 0.925 g/cm3, and average viscosity molecular weight Mv and a valley temperature between the copolymer and high crystalline fraction, Thc, such that the Mv for a fraction above Thc from ATREF divided by Mv of the whole polymer from ATREF (Mhc/Mhp) is less than 1.95. The copolymer has composition distribution breadth index (CDBI) of less than 60%. One other second layer includes a second a copolymer of ethylene and at least one alpha-olefin. The second copolymer has density of 0.925-0.965 g/cm3. |
Another patent 2513646.
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