COMPOSITIONS FOR THE PRODUCTION OF POLYURETHANE FOAM MATERIALS HAVING IMPROVED FORM STABILITY

摘要

-A- COMPOSITIONS FOR THE PRODUCTION OF POLYURETHANE FOAM MATERIALS HAVING IMPROVED FORM STABILITY The present invention relates to one component polyurethane foam compositions which comprise mixtures of prepolymers of a polyol and an excess of isocyanate; the usual adjuvants for polyurethane foams, an expanding gas under pressure and a polysiloxane compound with antifoam activity stored in a valved pressure vessel.