Polyurethane foaming composition comprising triorganosilylated polypentaerythritol stabilizer

Abstract

A flexible, elastic, uniform polyurethane foam is cold foamed and set from a composition of matter comprising (i) a polyisocyanate, (ii) a polyether-polyol having a molecular weight ranging from 800 to 50,000 and at least 2.1 hydroxyl radicals per mol, of which hydroxyl radicals at least 35% are primary hydroxyl radicals, (iii) a stabilizing amount of an organosilicon stabilizer therefor, and (iv) a blowing agent; said organo silicon stabilizer being a triorganosilylated polypentaerythritol having the structural formula: (R.sub.3 SiOCH.sub.2).sub.4-a C{CH.sub.2 OCH.sub.2 C(CH.sub.2 OSiR.sub.3).sub.3 }.sub.a wherein each R, which may be the same or different, is methyl, ethyl or vinyl, at least one R per each --SiR.sub.3 group being methyl, and further wherein a is 1, 2, 3 or 4.

Dependencies are inferred from the claim text.