Patent ID: 8067479
Filing Date: 2011-11-29
Classification: C08G,C08K,Y10T

Abstract:
1. A microcellular polyurethane foam, obtained by reacting: i) an isocyanate-terminated prepolymer obtained by reacting a polyisocyanate with a first polyester, which is formed from: ii) a second polyester, which is formed from: iii) a chain extender; wherein: i) said first and second polyesters may be the same or different; ii) said foam retains at least 80% of its initial tensile strength after being subjected to hydrolysis for 2 weeks; and iii) the molar ratio of the chain extender to second polyester reacting to form the microcellular polyurethane foam is in the range from 1 to 10:1.