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Phenolic resin-based foamed plastic Invention relates to foamed plastic, based on phenolic resin, which can be used as a heat-insulating and fireproof material for construction and general industrial purposes. The foamed plastic contains hydrocarbon and/or chlorinated aliphatic hydrocarbon, where the average pore diameter is in the range from 5 mcm or more to 200 mcm or less, a part of the area of the surface of voids constitutes 5% or less in its transverse section, the density is in the range from 15 kg/m3 or more to 26 kg/m3 or less, and when pressing with 10% displacement in the direction, perpendicular to the thickness direction, is performed, the level of shape recovery after 1 min after the release of the said pressing pressure is in the range from 96.0% or more to 98.5% or lower, with the degree of the change of levels of shape recovery C being in the range from 0.030%/hour or more to 0.060%/hour or less. |
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Protein-containing foam materials, obtaining and application thereof Invention relates to polyurethane foam material, method of obtaining polyurethane foam material, premix for obtaining polyurethane material and product, containing foam material. Polyurethane foam material represents product of reaction of mixture: (a) isocyanate-based reagent; (b) optional compound, which reacts with isocyanate, and protein-containing composition, capable of reducing density of polyurethane foam material by at least 5% relative to polyurethane material, obtained from the same mixture but without protein-containing composition. |
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Extrusion head, primarily, for extrusion of cellular polycarbonate sheets Extrusion head, a mandrel, integrated with mandrel holder, is made of stainless steel and represents the internal part of split spinneret integrated with cellular plastic production line. Invention ensures the mandrel forming part shape by making the chamfers over the entire length of the mandrel forming part at the points of two top angles of mandrel forming part for construction of hexagonal figure. Said chamber represents an equilateral right triangle in cross-section. |
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Heat-transmitting compositions Invention relates to field of heat-transmitting compositions. Heat-transmitting composition contains in fact from approximately 60 to approximately 85 wt % of trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)) and from approximately 15 to approximately 40 wt % of fluoroethane (R-161). Invention also deals with heat-transmitting composition, which includes R-1234ze(E), R-161 and 1,1,1,2-tetrafluoroethane (R-134a). |
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Polypropylene for foamed plastic and foamed polypropylene Invention relates to a polypropylene composition for foamed plastic, a method of obtaining the polypropylene composition and the foamed plastic and to foamed products, obtained from the polypropylene composition. The composition contains a polypropylene basic polymer in a quantity not less than 96 wt % of the total weight of the polypropylene composition and the content of substances, non-soluble in hot xylene, in a quantity from 0.10 to 0.30 wt % of the total weight of the polypropylene composition. The composition has an index of melt fluidity (ILF2) which constitutes at least from 1.0 to 5.0 g/10 min, melt strength F30 - not less than 30 cN, determined in the Rheotens test at 200°C, and melt tensility v30 - of less than 200 m/s, determined in the Rhoetens test at 200°C. The method of the composition obtaining includes obtaining an intermediate polypropylene, which has MFI2 in a quantity from 0.5 to 2.5 g/10 min, in the presence of an asymmetric catalyst. After that, the intermediate polypropylene is mixed with peroxide and at least one diene at a temperature, which constitutes from 20 to 90°C, for not less than 2 minutes with the formation of a preliminarily mixed material, with the following mixing in a mixing device in a melt at a temperature of an extruder cylinder from 180°C to 300°C. |
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Fast-reacting composition for preparation of low-density solid polyurethane foam Invention relates to fast-reacting composition, applied for obtaining low-density solid polyurethane foam. Described is fast-reacting composition, applied for obtaining low-density solid polyurethane foam, obtained by mixing the following components in proper proportion by weight: highly-active complex material:foamer:isocyanate - 100:(8~28):(105~155);with highly-active complex material being obtained by mixing the following components in proper proportion by weight: mixed polyol:foam stabiliser:water:additional ingredient - 100:(0.5~3.5):(1.0~10):(0.5~3.0):(0~5); with foamer being related to mixture of cyclopentane and HFC-365 mfc, or mixture of cyclopentane and HFC-245 fa, or mixture of cyclopentane, HFC-365 mfc and HFC-245 fa; and mixed polyol consisting of polyesterpolyol with hydroxyl number 100-450 mg KOH/g, Mannih's polyol with hydroxyl number 160-750 KOH/g and polyetherpolyol, where polyesterpolyol constitutes 1.0-30 wt % of the total weight of mixed polyol, and Mannih's polyol constitutes 0-50 wt % of the total weight of mixed polyol, and residue represents polyetherpolyol. |
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Method for production of microcapsules of dry girasol extract in pectin Invention relates to food industry. The method for production of dry girasol extract in pectin envisages usage of a microcapsule shell, represented by low-etherified and high-etherified apple and citrus pectins, and a nucleus, represented by dry girasol extract. The microcapsules are produced by way of the pectin mixture stirring in benzol, with the surfactant represented by preparation E472c, in a magnetic stirrer. Then dry girasol extract is added into the mixture which is deposited with acetonitrile. Then the produced microcapsule suspension is filtered, washed with acetonitrile and dried. |
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Three-component compositions for low-productivity cooling Invention relates to compositions, containing 2,3,3,3-tetrafluoropropene, applied as a heat-conductive liquid. Described is the application of a composition, containing from 10 to 90 wt % of 2,3,3,3-tetrafluoropropene, from 5 to 80 wt % of HFC-134a and from 5 to 10 wt % of HFC-32, as a heat-conductive fluid medium in compressor cooling systems with heat-exchangers, functioning in a counter-flow mode. |
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Method for producing elastic urethane foam and urethane foam produced by this method Invention refers to a method for producing elastic urethane foam and to the urethane foam produced by implementing this method. The method for producing the elastic urethane foam involves dispersing an organogel material in a reaction mixture containing a foaming substance, and foaming the mixture. The elastic urethane foam produced by the above method possesses the following characteristics: density of 25 to 120 kg/m3, elasticity more than 35% measured at 20°C in accordance with ASTM D 3574 H requirements, ILD hardness 60 to 500 H at a 40% impression measured in accordance with ISO 2439 B requirements. |
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Invention relates to foam polyisocyanurate composition, which can be applied in production of heat-insulating materials and building panels. Foam polycyanurate composition includes polyisocyanate compound, first polyetherpolyol based on ester, including residue of orthophthalic acid, second polyetherpolyol based on ester, including residue of terephthalic acid, at least one polyetherpolyol based on ether, which is characterised by functionality, constituting at least 3, and hydroxyl number, which changes in the range from 200 to 850 mg KOH/g. Composition also includes physical foaming agent and water in quantity from 0.2 to 3 wt % counted per the total quantity of components in reaction mixture, where isocyanate index constitutes from 250 to 500. Also described is product, which contains claimed composition, and method of panel obtaining, which has facing and block from foam polyisocyanurate. |
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Invention relates to heat-exchange compositions, used in cooling systems and heat-transmitting devices. Heat-exchange composition includes, at least, approximately 45 wt % of trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), to approximately 10 wt % of carbon dioxide (R-744) and from approximately 2 to approximately 50 wt % of 1,1,1,2-tetrafluoroethane (R-134a). |
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Compositions, containing fluorine-substituted olefins Invention relates to compositions, methods and systems, used in many fields, including in particular heat transmission systems, for instance, cooling systems, foam generators, foam compositions, foams and products, including foam or made of foam, methods of obtaining foams, including single-component ones, aerosols, propellents, cleaning compositions. Compositions, used for said systems, contain, at least, about 5 wt % of 1-chloro-3,3,3-trifluoropropene (HFCO-1233zd) and 1,3,3,3-tetrafluoropropene (HFO-1234ze). |
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Three-component composition for highly powerful cooling Invention relates to compositions, containing 2,3,3,3-tetrafluoropropene, and their application as liquid heat carriers, extension agents, solvents and aerosols. Composition contains from 15 to 50 wt % of 2,3,3,3-tetrafluoropropene, from 5 to 40 wt % of from 5 to 40 wt % of HFC-134a and from 45 to 60 wt %, preferably from 45 to 50 wt %, of HFC-32. |
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Improved porous materials based on aromatic amines Invention deals with porous material. Described is porous material, containing the following components in modified form: (a1) at least one multifunctional isocyanate and (a2) at least one multifunctional substituted aromatic amine (a2-s) in accordance with general formula: , given below, and optionally at least one additional multifunctional amine, which is different from amines (a2-s) in accordance with general formula (I), selected from the group, consisting of multifunctional aliphatic amines (a2-a) and multifunctional aromatic amines (a2-u), and R1 and R2 can be similar or different, and they are independently on each other selected from the group, which is formed by hydrogen and linear or branched alkyl groups with 1-6 carbon atoms, and all substituents Q1-Q5 and Q1'-Q5' are similar or different, and they are independently on each other selected from the group, formed by hydrogen, primary amino group and linear or branched alkyl group with 1012 carbon atoms, and alkyl group can have additional functional groups on condition that compound in accordance with general formula (I) includes at least two primary amino groups, and at least one of Q1, Q3 and Q5 represents primary amino group, and at least one of Q1', Q3' and Q5' represents primary amino group, and Q2, Q4, Q2' and Q4' are selected in such a way that compound in accordance with general formula (I) contains at least one linear or branched alkyl group, which can have additional functional groups with 1-12 carbon atoms in α-position to at least one primary amino group bound with aromatic nucleus. Described is method of manufacturing porous materials, including: (a) preparation of component (a1) and separately from it component (a2), in each case in solvent (C); (b) reaction of components (a1) and (a2) in presence of solvent (C) with formation of gel and (c) drying gel, obtained at the previous stage. Also described is application of porous materials as insulating material or for vacuum insulating panels. |
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Heat-insulating foamed products and compositions for their manufacturing Invention relates to thermally insulating foamed products and compositions for their manufacturing. Thermally insulating foamed products have density from 5 to 50 g/l and thermal conductivity from 25 to 50 mW/mK. Products are obtained from compositions of nanoparticles of expandable vinylaromatic polymers, which include: a. 10-90 wt % of balls/granules of expandable vinylaromatic polymer, coloured with non-heat-conducting filling agent from coke in form of particles with the average particle diameter from 0.5 to 100 mcm, which has surface area in accordance with ASTM D-3037-89 (BET) from 5 to 50 m2/g, containing up to 5 wt % with respect to polymer (a), of graphite and/or soot, and b. 90-10 wt % of balls/granules of in fact white expandable vinylaromatic polymer. |
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Fire-resistant foamed polymer composite material and method of obtaining thereof Invention relates to fire-resistant polymer composite material and can be applied in aviation, space technology and different fields of construction. Fire-resistant foamed polymer composite material contains perforated foamed polymer as base and filler, filling its pores. Filler contains mixture of synthetic rubbers, possessing fire resistance in the range from 200 to 700°C, if necessary - stabiliser, solvent, pigments, flame retardants, solidifying agent - polyamine, aminosilane or their mixtures. Finished perforated foamed polymer material with area of perforated surface in horizontal section 15-60% is used, liquid filler is prepared and used to fill perforation volumes of foamed polymer material at room temperature until density of composite material 0.25-1.0 g/cm3 is achieved, with further solidification of material for 15-28 hours. |
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Inorganic nanoporous particles with water-dispersible polyurethane binding substance Invention relates to product, method of product obtaining and product application. Product contains inorganic nanoporous particles, bound to each other by water-dispersible polyurethane, where product includes 75 vol % or more inorganic nanoporous particles counted per the total volume of product and less than 5 vol % of water-dispersible polyurethane counted per the total volume of dry product, and has density 0.14 g/cm3 or lower and heat conductivity 25 mW/(m·K) or lower and is at least 0.5 cm thick. Inorganic nanoporous particles are functionally free from organic components, which have potential reactivity of covalent bonding, and functional coating on particles, and product is functionally free from hollow non-porous particles, layered silicates and clayey minerals; has pore walls, which are sufficiently hydrophobic to eliminate water absorption in the entire porous structure of particles. Product has thickness and sufficient flexibility for bending plane, perpendicular to thickness by at least 90° around the core, which has diameter, equal to product thickness, without macroscopic rupture or destruction. Water-dispersible polyurethane is cross-linked. Method of product obtaining includes dispersion of inorganic nanoporous particles in water dispersion of water-dispersible polyurethane with formation of filled dispersion, pouring filled dispersion into mould and drying with product formation. Method of product application includes placement of product in structure between two areas, which can differ in temperature. |
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Method of obtaining foam polyurethanes Invention relates to method of obtaining foam polyurethanes, mainly soft polyurethane polyfoams. Foam polyurethanes are obtained from A1 compounds, containing hydrogen atoms, reactionable with respect to isocyanates, with molecular weight 400-15000, A2, if necessary, compounds, containing hydrogen atoms, reactionable with respect to isocyanates, with molecular weight 62-399, A3 water and/or physical foaming substances, A4, if necessary, auxiliary substances and additives, as, for instance a) catalysts, different from component A5, b) surface-active additives, c) pigments or fire-protective substances, A5 of at least one tin (II) salt of general formula (I) Sn(CxH2x+1COO)2, with x standing for integer number from 9 to 15 and alkyl chain CxH2x+1 being branched, and B di- or polyisocyanates. |
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Novel crystalline foam material Invention relates to obtaining crystalline foam material and to crystalline foam material itself. Crystalline foam material is obtained in several stages: creation of first, crystalline arrangement of gas bubbles in composition to be hardened and then, realisation of said composition hardening. Liquid composition, capable of hardening and capable of forming a set of one or several groups, selected from urethane, isocyanurate and oxazolidone groups, is obtained. Crystalline arrangement of gas bubbles in composition to be solidified is obtained due to precipitation of monodisperse gas bubbles into said liquid composition to be solidified. Said composition is solidified. Foam material can be used, for instance, in fields of application of heat insulation, floatability, in construction, in packing, in soles of shoes, furniture, etc. |
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Elastic inorganic-organic hybrid foam material Invention relates to method of obtaining elastic inorganic-organic hybrid foam material and to foam material, obtained in accordance with said method. Method of obtaining foam material by foaming mixture, which contains, wt %: mineral A), selected from reagypsum, kaolin or wollastonite 50-97, dissolved in water polyvinylamine B) 1-45, foaming agent C) 1-50, emulsifier D) 1-5, cross-linking agent E), capable of reacting with polyvinylamine B), 0-5, with weight percent of components A) and B) referring to solid phase and the sum of A)-E) constituting 100 wt %. Foam material is obtained by claimed method. Invention is developed in dependent items of the invention formula. |
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Foam polystyrene pellets with reinforcing shell and method of their production Invention relates to metallurgy, particularly, to production of porous forged pieces and ingots with inferior fusion point and fusible metals and alloys used for production of parts in machine building and other industrial branches. Foam polystyrene with reinforcing shell consists of surface film with internal cells filled with isopentane and air and coated with outer functional shell of one, or two or three plies. Every said ply comprises binders of the following composition, in wt %: liquid glass - 50, water - 49, surfactant - 1 and additive of disperse metal powder selected from aluminium, magnesium, zinc, lead powders or refractory material powder selected from alumina, magnesite, silica with particle size not over 100 mcm. Invention describes also the method of production of said pellets. It consists in forming of the coating as laminar shell including one, or two, or three plies by application on said pellets of liquid glass binder with addition of surfactant by pulverisation and disperse metal powder or refractory material powder by sprinkling with agitation at screen vibrating pan. Then, they are dried in air flow heated to 70°C for 10 minutes and cooled for bonding of powder particles to get reinforcing shell. |
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Invention relates to liquid composition for foaming polyvinylchloride (PVC), used to obtain extruded sheets. Composition for PVC foaming contains liquid carrier, exothermic and endothermic chemical foaming agents and 0.3 wt % and less of water. |
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Invention relates to production of foamed plastic articles. Disclosed is a method of producing foamed plastic articles by introducing a blowing composition into a polymer matrix and by forming pores therein as a result of release of carbon dioxide gas from said blowing composition, said composition comprising at least one carbon dioxide carrier selected from carbonates, hydrogen carbonates and carbamates of alkali metals, alkali-earth metals, aluminium, transition metals and/or ammonium, and at least one acid carrier. Also disclosed are foamed plastic articles, a blowing composition and use of the blowing composition. |
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Porous membrane and method of its production Invention relates to production of porous membrane suitable for use in electrochemical devices such as various storage batteries, capacitors, etc. Porous membrane comprises cellulose fibres including 5 wt % or more of cellulose fibres (per sum of total mass thereof) with diameter of 1 mcm or more and features tensile strength of 50 Nm/g or larger and/or tenacity of 0.40 kN/m or larger. |
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Method of producing fire-resistant polyurethane foam with good lasting operational properties Invention relates to a method of producing fire-resistant polyurethane foam. The method of producing fire-resistant polyurethane foam is carried out using a component A, consisting of A1 100 pts.wt of one or more filler-containing polyether poplyols (A1.1), wherein the filler is a reaction product of di- or polyisocyanate with a compound containing hydrogen atoms that are reactive with respect to isocyanates, or a mixture of A1.1 containing polyether polyol filler, wherein the filler is a reaction product of di- or polyisocyanate with a compound containing hydrogen atoms that are reactive with respect to isocyanates, and A1.1 other compounds containing hydrogen atoms that are reactive with respect to isocyanates, with molecular weight of 400-18000; A2 0-10 pts.wt (with respect to component A1) of compounds containing hydrogen atoms that are reactive with respect to isocyanates, with molecular weight of 62-399; A3 0.5-25 pts.wt (with respect to component A1) of water and/or a physical blowing agent; A4 1-9 pts.wt (with respect to component A1) of red phosphorus; A5 0-15 pts.wt (with respect to component A1) auxiliary substances and additives such as a) catalysts, b) surfactant additives, c) one or more additives selected from a group consisting of a reaction inhibitor, a pore regulator, pigments, dyes, different from component A4 of the fire-resistant agent, anti-ageing and anti-atmospheric stabilisers, a plasticiser, fungistatically and bacteriostatically active substances, filling agents and a lubricant, and a component B consisting of di- or polyisocyanates, wherein ammonium polyphosphate and malamine are not used and production is carried out with a characteristic number of 50-250. Also disclosed is polyurethane foam obtained according to the method disclosed in claim 1. |
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Extruded polystyrene foam with broad comonomer content distribution Invention relates to an article made of extruded polymer foam and a method of producing an article from extruded polymer foam. Obtaining an extruded polymer foam using a thermoplastic polymer composition of styrene-acrylonitrile copolymer having copolymerised acrylonitrile comonomer content of 20 wt % or less, average acrylonitrile comonomer content greater than its median acrylonitrile comonomer content and average copolymerised acrylonitrile comonomer distribution having width at half-height greater than 2.5 wt % as measured at half-peak height of a copolymerised acrylonitrile comonomer distribution curve for the styrene-acrylonitrile copolymer. |
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Laminated sheet of foamed phenol resin and method of thereof production Invention relates to laminated sheet of foamed phenol resin and to method of its production. Sheet contains foamed phenol resin and surface material, covering the surface of phenol resin, where foamed phenol resin contains hydrocarbon, chlorinated aliphatic hydrocarbon or their combination, density of foamed phenol resin equals from 10 kg/m3 to 100 kg/m3, the average diameter of foamed phenol resin cells constitutes 5-200 mcm, content of closed cells of foamed phenol resin constitutes 85-99%, and absolute value of degree of measurement of foamed phenol resin dimensions Δεb, determined by test method, described in standard EN1604, constitutes 0.49% or less. Sheet is manufactured by foaming and hardening of foamed phenol resin composition on face material, with foamed phenol resin composition containing resin, catalyst of hardening, foaming agent and surface-active substance. Content of resin free phenol constitutes 1.0-4.3 wt %, content of resin water constitutes 1.0-9.2 wt %, resin viscosity at 40°C constitutes 5000-100000 mPa·s. |
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Monomodal extruded foampolystyrene Claimed invention relates to product from extrusion foampolystyrene. Described is product from extrusion foampolystyrene, including polystyrene matrix, which determines cells; particles of halluazite clay, dispersed in polystyrene matrix in concentration higher than 0.1 wt.p. and 5 wt.p. or less counted per 100 part by the weight of entire polymer in polymer matrix; where particles of halluazite clay have size 1 micron or larger and 50 microns or smaller; and where fosmpolystyrene has monomodal distribution of cells by sizes and contains 50 wt.p. or less of all cations, different from barium cations, counted per one million of parts of the entire polymer in polystyrene matrix. |
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Heat-transmitting compositions Invention relates to heat-transmitting composition, containing E-1,3,3,3-tetrafluoroprop-1-ene (R1234ze(E)), 3,3,3 trifluoropropene (R-1243zf) and difluoromethane (R32). Described is application of said composition in heat exchanger, in formulation of foamed composition, dispersed composition, for cooling or heating product, in methods of purification or extraction of materials, reduction of impact on the environment produced by product of existing coolant exploitation. |
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Invention relates to nanocomposite compositions based on expandable thermoplastic polymers filled with graphene plates. Disclosed are nanocomposite compositions based on expandable thermoplastic polymers which comprise: a) a polymeric matrix produced by polymerisation of a base comprising one or more polymerisable monomers; b) 1-10 wt %, calculated with respect to the polymer (a), of a foaming agent embedded in the polymer matrix; c) 0.004-15 wt %, calculated with respect to the polymer (a), of an athermanous filler comprising nano-sized graphene plates with a thickness (perpendicular to the graphene sheet) not greater than 150 nm, an average dimension (length, width or diameter) not greater than 10 mcm and a surface area > 50 m2/g. |
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Compositions for heat transmission Invention relates to versions of composition for heat transmission. One of composition versions contains (i) from about 20 to about 90 wt % of R-1234yf; (ii) from about 10 to about 60 wt % of R-134a and (iii) from about 1 to about 20 wt % of R-32. Invention also relates to a number of versions of composition application. |
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Invention relates to a heat-insulating polymer foam which comprises a component which attenuates infrared radiation, and a method of producing the polymer foam. The polymer foam is prepared by extrusion foaming of a foamable thermoplastic polymer mixture using a foaming component. The mixture of foaming components contains 3-5 wt % carbon dioxide gas, less than 5 wt % alcohol containing 2-3 carbon atoms, less than 0.7 wt % water and less than 2.5 wt % isobutane; and where the foaming component contains at least 0.1 wt % water and/or alcohol containing 2-3 carbon atoms. The foam is obtained using 2-5 wt % of a component which attenuates infrared radiation, selected from petcoke and carbon black with particle size of 100-700 nm; 2.5-3.5 wt % bromine-substituted flame-retardant; and at least 0.1 wt % epoxy stabiliser. |
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Inhibitor of foam polyurethane scorching Foam polyurethane composition includes polyol and a composition of a scorching inhibitor, containing derivatives of phenol compounds, aromatic amines, hydroquinone, selected from 2,5-di-tert-amylhydroquinone and di-tert-butylhydroquinone, and phenothiazine. |
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Separator for electrochemical device and method of its manufacturing Separator for electrochemical device includes stages of suspension application to the substrate, at least the suspension contains cellulose fibres and hydrophilous agent of pores formation with boiling point 180°C or higher; drying of the above mentioned suspension with sheets manufacturing on the mentioned substrate, and sheets separation from the mentioned substrate with separator creation, where the mentioned separator has the volume resistivity 1500 Ohm·cm or below, as determined using alternating current with frequency 20 kHz and impregnated by 1 mol solution LiPF6 in propylene carbonate of the separator. |
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Sheet construction element from composite material Invention relates to a sheet construction element from a composite material, used in housing and industrial construction for long-span roofs and facades, as sandwich constructive elements in refrigerated warehouses, in sectional gates, in office constructions of a mobile type or in production of caravans. The sheet construction element contains two metal covering layers, a layer of rigid polyurethane and layer of dense polyurethane, which contains microcapsules with a core from a material with latent heat accumulation. An envelope of microcapsules is formed by polymerisation in situ from one or several monomers (monomers I), selected from the group, including alkyl esters of acrylic and/or metacrylic acids with a number of carbon atoms in alkyl from 1 to 24, acrylic acid, metacrylic acid and maleic acid. In addition polymers of the capsule envelope, preferably, contain embedded into polymer, at least, 10 wt %, but not more than 70 wt % of one or several bi- or polyfunctional monomers, which are non-soluble or badly soluble in water (monomers II), counted per the total weight of the monomers. In addition, the polymers can contain embedded into the polymer up to 40 wt % of other monomers III, different from the monomers I and II. |
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Composite for heat-insulating panel Invention relates to a product, representing a heat-insulating panel, which provides properties of a thermal barrier. The product contains: a. an extruded thermoplastic polymer foam, which has a thermoplastic polymer matrix, determining a multitude of cells, extruded thermoplastic polymer foam determines, at least, one plane; and b. A panel with vacuum insulation, located completely inside of, at least, one plane of the extruded thermoplastic polymer foam. The invention also relates to a method of the product obtaining. |
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Device for vacuum-therapy of wounds Invention relates to a device for vacuum-therapy of wounds, which contains a covering material (2) for airproof closing of a wound and the wound surrounding area (1); a means (7), suitable for the creation of vacuum in the wound zone, in particular to functional connection of the wound zone with the placed outside covering material vacuum source, to make it possible to create vacuum in the zone of the wound and suck out liquid from the wound zone; and an overlay onto the wound (3), and the overlay onto wound contains a foam-material with open pores based on cross-linked polyorganosiloxane, where the foam-material (c) can be obtained by reaction of the hardened mixture, which contains components: (i) polyorganosiloxane, which contains one or several groups with C2-C6-alkenyl group, preferably containing one or several vinyl groups, (ii) polyorganosiloxane, which contains one or several Si-H groups, (iii) pore-former, which contains one or several OH-groups and (iv) metalorganic catalyst. The invention also relates to the use of the foam-material with the open pores based on cross-linked polyorganosiloxane for the application in vacuum-therapy of wounds, in particular, in patients with the body mass index lower than 18. |
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Foam polymer, characterised by low level of bromine content Invention relates to extruded foam polymer, characterised by low level of bromine content, and to method of obtaining said extruded foam material. Foam polymer contains (a) polymer matrix, where more than 50 wt % of all polymers in polymer matrix represent alkenyl aromatic polymers, (b) 0.8-1.4 wt % of bromide calculated per polymer matrix weight, (c) 0.05-0.5 wt % of hydrobromic acid acceptor, dispersed in polymer matrix, calculated per polymer matrix weight, (d) less than 0.1 wt % of C-C and O-O labile organic compounds, dispersed in polymer matrix, calculated per polymer matrix weight, and (e) 0.5-1.5 wt % of graphite, dispersed into polymer matrix, calculated per the total weight of polymer matrix. |
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Method of making components from ultrafine porous polymer material Method includes preparing a thermoplastic solution in an organic solvent, crystallising the solution, moulding workpieces from the crystallised solution at temperature below the melting point of the solvent and removing the crystallised solvent. Before moulding, granules of the crystallised solution are ground and the required fraction of the obtained powder is collected. Moulding is carried out by extrusion. The crystallised solvent is removed by vacuum-sublimation drying at temperature not higher than 42°C. |
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Stabilisers for polymers containing aliphatically-bound bromine Invention relates to stabilised polymer compositions containing a bromated polymer flame retardant particularly intended for producing foam material. The polymer composition contains a block polymer, e.g. a styrene copolymer, an aliphatic bromine-containing polymer and a mixture of at least one alkyl phosphite and at least one epoxy compound. The set of stabilisers which includes alkyl phosphites and epoxy compounds is very effective in preventing cross-linking reactions which occur when an aliphatic bromine-containing polymer is subjected to high temperatures which are found in melt processing processes. |
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Polymer foam, containing bemite aluminium oxide Invention relates to polymer foams, applied for heat insulation, and methods of their obtaining. Claimed is polymer foam, which includes a polymer matrix, in which there is more than 50 wt % of thermoplastic polymers, determining multiple cells, which are dispersed in it, and bemite aluminium oxide dispersed inside the polymer matrix in a quantity of 0.5-5 wt % per weight of the polymer composition. A method of obtaining the said foam is also claimed. |
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Production of articles from granulated polymer materials (versions) Invention relates to production of articles of granulated polymer materials. Die is filled with polymer granules over 1 mm in size. Cold moulding and blank forming are performed at pressure not destructing the granule structure with subsequent sintering and cooling down. Note here that granulated material sintering temperature makes 0.58-0.80 of the polymer flow point. At making of articles from the mix of granules of at least two polymers with different flow points the sintering temperature makes 0.58-0.80 of that of easily melted polymer. |
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Invention relates to composition of foamed vinylaromatic polymers with improved heat-insulating ability, method of its obtaining and to foamed products, obtained from said com foamed vinylaromatic polymers position. Composition of foamed vinylaromatic polymers includes polymer matrix, obtained by polymerisation of base, which includes 50-100 wt % of one or more vinylaromatic monomers and 0-50 wt % of, at least, one copolymerised monomer; 1-10 wt %, basing on polymer weight, of foaming agent, in polymer matrix; 0.05-25 wt %, basing on polymer weight, of non-heat-transparent filling agent, which includes coke in form of particles with the average diameter from 0.5 to 100 mcm and surface area, measured in accordance with ASTM D-3037/89 standard, from 5 to 50 m2/g. Described is method of obtaining composition of foamed vinylaromatic polymers in water suspension, as well as continuous method of obtaining composition in mass. |
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Present invention relates to production of foamed vinyl aromatic polymers. The method of producing granules of fire-resistant foamed vinyl aromatic polymers, which enable to obtain foamed articles by aqueous suspension polymerisation, which includes polymerisation of styrene or a mixture of styrene and up to 25 wt % α-methylstyrene in an aqueous suspension in the presence of a peroxide initiating system which is active at temperature above 80°C, a foaming agent which is added before, during or after polymerisation, and in the presence of an amide of basic formula (I) R1CONHCH2 - CH2NHCOR2 (I), where R1 and R2, identical or different, denote an (iso)alkyl radical CH3(CH2)n for n ranging from 10 to 20, preferably from 16 to 18; and a fire-retardant system which includes a bromated additive with bromine content of more than 30 wt %, wherein said fire-retardant system includes bromated aliphatic, cycloaliphatic, aromatic compounds with bromine content of more than 30 wt %. Described is a foamed composition in form of granules based on vinyl aromatic polymers, which enables to obtain low-density foamed articles with improved insulating capacity, said composition including: a) a matrix obtained by polymerisation of styrene or a mixture of styrene and up to 25 wt % α-methylstyrene; b) 1-10 wt %, calculated with respect to the polymer matrix (a), foamed agent; c) 0.1-3 wt %, calculated with respect to the polymer matrix (a), self-extinguishing bromated additive in form of bromated aliphatic, cycloaliphatic, aromatic compounds with bromine content of more than 30 wt %; d) 0-1 wt %, calculated with respect to the polymer matrix (a), substance having synergetic effect, containing at least one C-C or C-O-O-C heat labile bond; e) 5-5000 mln-1, calculated with respect to the polymer matrix (a), amide of basic formula (I), obtained using the aqueous suspension polymerisation method described above. Also described is a foamed article, having thermal conductivity ranging from 34 to 36 mW/mK at 17 g/l, obtained by foaming and sintering granules based on a vinyl aromatic polymer composition described above. |
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Method of obtaining hard foam polyurethanes Invention relates to method of obtaining hard foam polyurethanes. Method of obtaining hard foam polyurethanes is realised by interaction of: a) organic polyisocyanates b) with compounds, which contain at least two reactionable with respect to isocyantate groups hydrogen atoms, in presence of c) pore-formers, d) catalysts, as well as if necessary e) additional substances and additives, and as component b) applied is mixture, which contains: b1) from 20 to 70 wt.p. of one or several highly functional ethers of polyatomic alcohols with functionality from 3.7 to 5.2 and hydroxyl number from 370 to 500 mg KOH/g, b2) from 5 to 30 wt.p. of one or several ethers of polyatomic alcohols based on aromatic amines with functionality from 3 to 4 and hydroxyl number from 150 to 500 mg KOH/g, b3) from 5 to 20 wt.p. of one or several low molecular agents of chain elongation and/or linking agents with functionality from 2 to 3 and weight average molecular weight Mw less than 400 g/mole, average hydroxyl number of which constitutes from 400 to 500 mg KOH/g. |
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Polyurethane foam with low content of monomers Invention relates to single-component polyurethane foam with low content of monomers, suitable to encapsulation, isolation and/or mounting of junctions, surfaces of roof, windows and doors or for filling cavities. Composition contains a) from 10 to 90 wt % of prepolymers from polyesterdiols, obtained by reaction with excess of diisocyanate with the following removal of excess monomer diisocyanate, b) from 90 to 10 wt % of component based on polyether polyols, which have either, at least, one Si(OR)3-group, where -OR radical is selected from methoxy-, ethoxy-, propoxy, butoxy-radicals, or, at least, one NCO-group, c) from 0.1 to 30 wt % of additives, d) at least, one foaming agent. Both polyesterdiols and polyetherdiols have molecular weight (MN) less than 5000 g/mol, and mixture from a and b has content of monomer diisocyanate less than 2 wt %. Invention also relates to method of claimed composition obtaining and application of composition for obtaining linkable foams in container. |
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Heat-insulating foamed products with increased stability to solar radiation include foamed polymeric matrix, obtained by foaming and agglomeration of globules/granules of vinylaromatic (co)polymer, inside of which filler is evenly allocated. Filler includes one athermanous material, selected from coke, graphite and soot, and, possibly inorganic additive, active within the range of wave lengths from 100 to 20000 cm-1. Polymeric matrix includes copolymer of styrene and one vinylaromatic comonomer, substituted in ring or in vinyl group, and/or mixture of polystyrene and to 10 wt %, relative to mixture, thermoplastic polymer, compatible with polystyrene and having Tg (temperature of vitrifying) > 100°C. |
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Invention relates to an expandable copolymer of tetrafluoroethylene, a porous material, containing such copolymer, a formed product from the porous material and a medical device, containing the said tetrafluoroethylene copolymer. The expanded tetrafluoroethylene copolymer contains 98 wt % or less of monomer tetrafluoroethylene units and at least 2.0 wt % of at least one other comonomer, different from tetrafluoroethylene. The said copolymer after processing at a temperature of about 290°C or lower demonstrates adhesion. At least one other comonomer represents olefin, selected from a group, consisting of ethylene, propylene and isobutylene, a fluorinated monomer, selected from a group, consisting of chlorotrifluoroethylene, hexafluoropropylene, vinylidenfluoride, vinylidendifluoride, hexafluoroisobutylene, trifluoroethylene, fluorodioxol and fluorodioxalane, a perfluoroalkylethylene monomer or a perfluoroalkylvinyl ether. |
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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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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 %. |
Another patent 2550859.