Patent ID: 6455601
Filing Date: 2002-09-24
Classification: C07C,C08G,C08J

Abstract:
Polyurethane foam comprising the reaction product of:(1) polyphenylene polymethylene polyisocyanate composition including, (a) 15 to 42 percent by weight, based on 100% of the polyisocyanate composition, of diphenylmethane diisocyanate, (b) 3-ring oligomers of polyphenylene polymethylene polyisocyanate in an amount such that the ratio of (a) to (b) is equal to from about 0.2 to about 1.8, and (c) higher homologues of polyphenylene polymethylene polyisocyanate; (2) isocyanate-reactive composition containing a plurality of isocyanate-reactive groups; and (3) hydrocarbon blowing agent.