FOAMED POLYURETHANE Russian patent published in 2011 - IPC C08G18/10 C08G18/28 C08G18/48 C08G18/68 C08G18/76 C08G101/00 

FIELD: chemistry.

SUBSTANCE: 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.

EFFECT: obtaining elastic, semi-rigid and rigid open-pore and closed-pore foam with virtually no change in colour and precuring effect, which are stable, can withstand high loads and have sufficient rigidity for retaining the shape during use.

30 cl, 2 ex, 11 tbl