Patent ID: 7670501
Filing Date: 2010-03-02
Classification: C08G,C08J,Y10T

Abstract:
1. An isocyanate-reactive component for the production of a low density, flexible microcellular polyurethane elastomer comprising: a) a polyol having a hydroxyl group functionality of at least 1.7 and a molecular weight of from about 1,000 to about b) a catalyst, c) a surfactant, d) optionally, a crosslinking agent, e) optionally, water, and f) dissolved carbon dioxide in an amount ranging from 0.2 g/L to 4 g/L in which (1) the dissolved carbon dioxide is present in an amount such that the isocyanate-reactive component has a froth density of from about 0.1 to about 0.8 g/cc and (2) total amount of the dissolved carbon dioxide plus any carbon dioxide generated during reaction of the water with the isocyanate will when combined with a polyisocyanate produce a polyurethane-forming reaction mixture having a free rise density of from about 0.03 to 0.3 g/cc.