Patent ID: 6423755
Filing Date: 2002-07-23
Classification: C08G,C08J

Abstract:
A process for making a polyurethane foam, comprising(1) mixing under reaction conditions a high viscosity isocyanate-reactive component (a) and a high viscosity polyisocyanate component (b), wherein component (a) includes at least one polyol, a blowing agent and at least one thixotropic agent, component (b) includes at least one polyisocyanate compound and at least one thixotropic agent, wherein one or both of components (a) and (b) contain a plurality of hollow microspheres, and wherein each of said component (a) and component (b) has a Brookfield viscosity (spindle 7, 25Â° C., 10 rpm) of at least about 50,000 cps (50 Pa.s), and (2) allowing the mixture to expand in place and cure.