Patent ID: 7737192

Claim:
A process for producing a flexible polyurethane foam comprising blending (i) a polyurethane raw material containing a polyol, a polyisocyanate, 7 to 13 parts by weight of water as a blowing agent based on 100 parts by weight of the polyol, and a catalyst with (ii) an inorganic compound hydrate having a specific gravity of 1.5 to 4.0; and reacting the polyurethane raw material to effect foaming, followed by curing by passing through a heating furnace, wherein an increase in exothermic temperature owing to the foaming and curing is diminished by evaporation of water formed through decomposition of the inorganic compound hydrate, and wherein said inorganic compound hydrate has a decomposition temperature of from 100 to 170° C., and said exothermic temperature of the foam during foaming and curing is suppressed to 170° C. or lower.