PROCESS FOR THE PRODUCTION OF A RIGID POLYURETHANE FOAM AND A COMPOSITION FOR THE PRODUCTION OF A RIGID POLYURETHANE FOAM

摘要

Process for the production of a rigid polyurethane foam and a composition for the production of a rigid Polyurethane foam The present invention relates to a method of producing a rigid polyurethane foamin which a polyisocyanate containing a benzene ring is used as an organic isocyanate and a polyether polyol and/or polyester polyol is used as a polyol, characterized in that a hydrocarbon is used as the blowing agent and a compound having a hydrophobic group and a hydroxyl group in the molecule is used as an emulsifying agent. The blowing agent is preferably a hydrocarbon selected from the group consisting of cyclopentane, n-pentane and iso-pentane.