Patent ID: 8217092
Filing Date: 2012-07-10
Classification: C08G

Abstract:
1. A multicomponent polyurethane/vinyl ester hybrid foam system for forming a gradient foam with soft and rigid foam regions, with a polyol component (A), which contains a polyisocyanate component (B), which contains at least one polyisocyanate with an NCO functionality of at least 2; and a component (C), which contains a thermally activatable free radical-forming agent that is activated thermally at a temperature of 60° C. to 90° C. as a catalyst for the polymerization of the vinyl monomer, the component (C) present separately from the polyol component (A) and/or the polyisocyanate component (B) to inhibit reaction and reacting only when mixed, wherein the proportion by weight of the vinyl ester mixture in the polyol component (A) is greater than the proportion by weight of the at least one polyol in the polyol component (A) as well as the proportion by weight of the at least one polyisocyanate in the polyisocyanate component (B).