Unsaturated polyesters (C08G18/68)

Method of obtaining polymer foam composition (versions)

Invention relates to foamed polymers. A freshly prepared foam-polyurethane composition is mixed with a freshly prepared polyether or epoxy composition in the concentration of 0.1-99.9% or a monomer of a foam-polyurethane composition is mixed with a monomer of the polyether or epoxy composition in the concentration of 0.1-99.9%, and solidifying agents of the said compositions are mixed in exactly the same concentration, after which mixing of both monomers with both the solidifying agents is carried out.

Polyurethane coatings characterised by improved interlayer adhesion

Composition contains: (a) an isocyanate component containing an aliphatic isocyanate and an aromatic isocyanate, and (b) a polyol component containing an acrylic polyol and a polyester-polyol, wherein the acrylic polyol contains a mixture of a hard acrylic polyol with glass transition temperature (Tg) higher than 20°C and a soft acrylic polyol with Tg lower than 20°C. Also described is a method of teating an aged polyurethane surface using said composition, as well as a substrate having an aged polyurethane surface and a polyurethane coating from the disclosed composition.

Method of producing epoxy polyurethanes

Realisation of the present method involves reaction of polyol with expoxy resin at temperature 160-180°C for 50-60 minutes. The obtained mixture is then vacuum-treated for 5 minutes at pressure 3-5 mm Hg and cooled to room temperature. A calculated amount of isocyanate is added, stirred for 3-5 minutes and hardened.

Polyesterpolyols having secondary alcohol groups and use thereof in synthesis of polyurethanes, such as flexible foamed polyurethanes

Invention relates to polyesters which are used in synthesis of flexible foamed polyurethanes. Copolyester - a liquid at 50°C - has (a) an initiator segment which is a polyether with molecular weight between 300 and 1500 and at least two hydroxyl groups, and (b) at least three ester links per molecule of copolyester on average, where the said links are from a hydroxyl-containing fatty acid which contains 7 or more carbon atoms, or a mixture of two or more of the said fatty acids. The fatty acids contain a secondary hydroxyl which lies at least five carbon atoms from the carbonyl carbon atom of the acid group of the fatty acid and a primary hydroxyl with one or more hydroxymethyl groups. The copolyester contains 3.5-10 ester links per total number of hydroxyl, primary amine and secondary amine groups of the initiator compound.

Foamed polyurethane

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.

Moisture-hardened meltable glues, method of their manufacturing and their application

Sewing in moist medium meltable glue for immediate processing of glued bases contains products of interaction of multi-functional (poly)isocyanates with complex hydroxypolyethers based on polyols and dicarboxylic acids or their derivatives, suitable for carrying out condensation reactions, as dicarboxylic acid at least one linear aliphatic dicarboxylic acid from group including octadecandicarboxylic acid and hexadecandicarboxylic acid, is used.