PRODUCTION OF POLYURETHANE FOAM

摘要

PURPOSE:To produce a flexible polyurethane foam good in physical properties such as, repulsive resistance compression set, etc. CONSTITUTION:A flexible polyurethane foam is produced by reacting a polyisocyanate component, a polyol component, a blowing agent, a catalyst, and a foam stabilizer. The polyisocyanate component comprises 50wt.% or higher diphenylmethane diisocyanate and/or polymethylene polyphenylene polyisocyanate or its modification and 50wt.% or lower other polyisocyanate. The polyol component is a polymer polyol obtd. by polymerizing a vinyl monomer in a specific polyol (a1) and/or another specific polyol (a2) or is a mixture of the polymer polyol with the polyol (a1) and or/the polyol (a2). The blowing agent is water.