A method of obtaining a semi-rigid polyurethane foam

The invention relates to methods for molding urethane elastomers with high strength properties and may find application in engineering, for example, for the manufacture of coating rolls of paper machines, rollers assemblies of sheet metal and other bulky items

The invention relates to the field of technology for elastic monopolarity in the presence of a catalyst, and may find application in the manufacture of gaskets furniture and upholstered car seats

The invention relates to the chemistry of polyurethanes and concerns a method for obtaining the closed form elastic polyurethane foam products used in the furniture industry, vehicles and so on

The invention relates to the production of polyurethane foams and concerns a method for obtaining polyurethane foam plastics, in which the foaming is produced using pure nitrogen as a pore-forming means

The invention relates to the production of foams with reduced Flammability based on isocyanates and can be used in the manufacture of thermal insulation in industrial and civil construction at the place of use

The invention relates to the field of production of rigid moulded polyurethane foam and can be used in various industries for manufacturing of large-sized products of variable thickness and complex configuration

The invention relates to polyurethane chemistry and relates to a method of obtaining a hydroxyl-containing component for the manufacture of flexible molded polyurethane foam (PUF), which can be used in the furniture and automotive industries

The invention relates to methods for producing a rigid polyurethane foam used in the manufacture of refrigeration equipment, construction, etc

Invention pertains to the mixture for obtaining flexible polyurethane foam and can be used as mastic for hydro and thermal insulation of foundations, buildings, pipelines, as well as for filling cavities in building structures. The mixture contains defined ratios of the following components: a hydroxyl containing oligomer-copolymer of butadiene and piperylene with molecular mass of 2100 and containing 0.92% hydroxyl groups; isocyanate component - polymethylene polyphenyl isocyanate with 29-31% content of isocyanate groups; catalysts: dibutyl tin dilaurate and N,N,N- triethylamine; water; glycerine; polydimethyl siloxane and polydimethyl siloxane modified by a polyester in the form of foam stabilisers and extra bitumen. Use of bitumen considerably lowers moisture absorption of the material and increases viscosity of the foam systems. This also enables the material to retain the density attained during foaming. Use of defined foam stabilisers in the mixture enables formation of more fine cells, with high stability and attainment of low density of the polyurethane foam.

Invention refers to method for making bulk, high resilience slabstock or moulded foam, used for upholstery, automobile seats and panel cushions, for packing, other applications to softening and energy management, for sealing and other applications. The presented method involves as follows. Organic polyisocyanate contacts with polyol compound containing high mass equivalent polyol or mixed polyols with foaming agent, gelling catalyst and surface-active substance added. At least 10 wt % of high mass equivalent polyol (polyols) represent one or more equivalent mass hydoxymethyl-containing polyesterpolyols at least 400 up to 15000 produced by interaction of hydoxymethyl group containing fatty acid with 12-26 carbon or this acid ester atoms and compound initiator polyol or polyamine, thereby polyesterpolyol contains as follows: [H-X]_(n-p)-R-[X-Z]_p, where R is residual compound initiator, X is independent, -O-, -NH- or -NR'-, while Z- represents linear or branched chain containing one or more groups A, independently chosen of groups A1, A2, A3, A4 and A5, expressed by formulas (II), (III), (IV), (V) and (VI), respectively. Besides there is disclosed polyurethane foam made by the declared method. Declared method ensures making polyurethane foams with using polyol from renewable source.

Invention concerns method of obtaining compounded foam polyurethanes for operation as shock, heat and sound absorbing layers. Compounded foam polyurethanes are obtained by interaction of 100 weight parts of polyol component and 20 weight parts of polyisocyanate component, where polyol component is mixed preliminarily with 70-100 weight parts of rubber chips, and reaction mix is foamed and solidified at 160°C or higher to component destruction temperature. Butadiene and piperylene copolymer with 1200-3200 molecular weight and 0.8-1.1% content of hydroxylic groups is used as polyol component, and polymethylenepolyphenylisocyanate with 29-31% content of isocyanate groups is used as polyisocyanate component.

Invention is related to method for production of polyurethane foam with application of secondary waste of polyethylene terephtalate, and may be used for production of hard polyurethane foams. Polyurethane foam is produced by interaction of polyisocyanate with polyol component containing secondary waste of polyethylene terephtalate dissolved in triethanolamine or in mixture of mono-, di-, trichloracetic acids, in amount of not more than 67 wt % from total weight of polyol component. At that interaction is carried out at the ratio of polyol component : polyisocyanate as 1:1 - 1:2. Prepared polyurethane foams have good consumer properties, such as compression strength, oil-, heat resistance and reduced inflammability.

Polyurethane foam is obtained by mixing a pre-polymer with foaming ingredients, containing at least one multifunctional isocyanate and water, which react releasing carbon dioxide. The pre-polymer, which has terminal hydroxyl groups, is obtained by reacting at least one polyol with less than a theoretical amount of at least one multifunctional isocyanate. The pre-polymer which is stable during storage can be obtained with low or high viscosity by choosing the corresponding amount isocyanate, which reacts with polyol. Use of more viscous pre-polymer enables regulation and setting the size of cells of the obtained foam.

Method involves reacting a composition based on organic polyisocyanates with a composition which reacts with isocyanates in the presence of a hydrocarbon as a foaming agent. The said composition which reacts with isocyanates contains a maximum of 20 wt % polyester-polyols obtained from secondary streams, wastes or residue from production of DMT and/or PET, between 30 wt % and 50 wt % polyether-polyol obtained by reacting propylene oxide with an aromatic amine as an initiator, and between 30 wt % and 50 wt % polyether-polyol which is not initiated by an aromatic amine, where amount is based on total amount of the compound which reacts with isocyanates. Rigid polyurethane foam or polyisocyanurate foam modified with urethane corresponding to this proposed invention has low lambda value especially at 10°C.

Present invention relates to compositions for foaming foam plastic used in insulation materials at low temperatures. The said composition ontains 1,1,1,3,3-pentafluorobutane (HFC - 365mfc) and 1,1,1,3,3-pentafluoropropane (HFC-245fa) with mass ratio HFC-365mfc/HFC-245fa between 65:35 and 73:27.The invention also relates to a premix for producing foamed polyurethane or modified foamed polyurethane which contains such a foaming composition, at least one polyol and a catalyst for reaction of isocyanates and polyols. The invention also describes a method of producing foamed polyurethane or modified foamed polyurethane using the disclosed foaming composition, as well as heat insulation material which contains foamed polyurethane or modified foamed polyurethane made using the said method. When prepared systems are used completely, the foaming composition does not have an ignition point, which provides safe production of (modified) foamed polyurethane.

Present invention relates to a liquid polyurethane reactive system for producing shoe articles with a solid coating, e.g. sole inserts, soles etc. This reactive system includes at least one polyol meant for reaction with at least one isocyanate prepolymer, an expansion agent, an additive which contains a catalyst and expanded microspheres. The polyol is selected from polyester polyols with molecular weight from 1500 to 3000. Amount of expanded microspheres ranges from 1.0 to 30 % of the weight of polyol and the additive. Amount of the expansion agent ranges from 0.5 to 3.5% of the weight of polyol and additive. The invention also relates to a method of producing foamed shoe articles with a solid coating using the said liquid polyurethane system, resulting in a foamed structure with spontaneous foam density between 0.05 and 0.22 g/ml, as well as to foamed polyurethane shoe components made using the said method, and to use of expanded microspheres in the said liquid reactive polyurethane system.

Invention relates to polyurethane used, for example, as seat cushions, decorative elements for the inside of cars etc, and to methods of producing said polyurethane via radical-initiated cross-linking in the presence of at least one agent which produces radicals and under the effect of ionising radiation, respectively. According to the given method, at least one polyfunctional isocyanate, at least one polyol which is completely or mainly polyether polyol with molecular weight higher than 1500, and foaming ingredients are subjected to addition polymerisation and a foaming reaction in the presence of at least one component with a reactive double bond to obtain a foamed mass with a polyurethane matrix. The polyfunctional isocyanate is not 4,4'-diisocyanate diphenylmethane or does not contain 4,4'-diisocyanate diphenylmethane, and the foamed mass undergoes radical-initiated cross-linking with the component with the reactive double bond which is an acrylate or methacrylate polymer containing at least two hydroxyl groups which also react with the said isocyanate so as to be embedded into the polyurethane matrix.

Invention relates to polymeric polyols obtained from hydroxyl-containing materials, as well as dispersions of polymer particles in the said material. The polyol has a continuous polyol phase and dispersion ethylene-unsaturated polymer particles grafted on at least one stabiliser. The polyol phase contains at least one hydroxymethyl-containing polyester polyol derived from a fatty acid or a fatty acid ester. The polyol is a product of reaction between 9(10)-hydroxymethyl stearate or its alkyl ester and polyether polyol, containing ethylene oxide or propylene oxide links. The dispersion particles are a vinylaromatic polymer, nitirle with ethylene unsaturation or a mixture of two or more of them. The stabiliser is an addition compound of polyether polyol and vinylmethoxy silane or isocyanate with ethylene unsaturation.