PROCESS FOR THE MANUFACTURE OF FOAMS COMPOSED OF POLYURETHANE OR OF MODIFIED POLYURETHANE

摘要

Foams composed of polyurethane, in particular of polyisocyanurates, having class B2 flame resistance are obtained via reaction of polyols and of isocyanates in the presence of a catalyst, of a polyepoxide and of a blowing agent other than a chlorofluorocarbon, particularly an HFC and/or a flammable blowing agent, such as n-pentane.