WATER BLOWN ENVIRONMENTALLY FRIENDLY HIGH YIELD SPRAY POLYURETHANE FOAM

原文（中国語）

The present invention relates to a process for the production of a polyurethane foam having a density of 5 to 20 g/dm. by mixing the following to give a reaction mixture: (a) polyisocyanates comprising PMDI, (b) compounds having at least two hydrogen atoms reactive toward isocyanate groups, comprising (b1) at least one polyether polyol obtained by alcoxylation of two or three functional starter molecule having a hydroxyl value of 210 to 400 mg KOH/g and (b2) at least one polyether polyol obtained by alcoxylation of an aliphatic diamine, (c) catalyst comprising (c1) at least one incorporable amine catalyst and (c2) at least catalyst comprising an urea structure, (d) blowing agent, comprising water, (c) optionally flame retardant and (f) optionally auxiliaries and additional substances, spraying the reaction mixture onto a substrate and allowing said reaction mixture to harden to give the polyurethane foam and wherein the reaction mixture comprises less than 1 part by weight of a phosphorous flame retardant. The resent invention is further directed to Polyurethane foam obtainable according to a process according to the present invention.