Patent ID: 6211257
Filing Date: 2001-04-03
Classification: C08G

Abstract:
A method for preparing a pour-in-place polymeric foam comprising urethane units and having an open-cell content sufficient to resist shrinkage comprising reactingan aromatic polymeric isocyanate withan emulsified polyol mixture at an NCO/OH index of from about 75-125, the polyol mixture comprising(a) a polyol formulation comprising from about 10% to about 100% by weight of a polyester polyol or mixtures of polyester polyols having an OH value of from about 150 to 350 and a molecular weight of from about 350 to 700;(b) a blowing agent;(c) a cell opening agent which is a divalent metal salt of a fatty acid; and(d) up to about 5% by weight of an acid based on the weight of the polyol mixture.