Polyol compositions and rigid polyisocyanate based foams containing 2-chloropropane and aliphatic hydrocarbon blowing agents

摘要

There is provided a polyol composition which comprises a a) compound having at least two isocyanate reactive hydrogens, at least one of which is a polyoxyalkylene polyether polyol, b) 2-chloropropane, and, c) a C4-C6 aliphatic hydrocarbon. There is also provided a rigid polyurethane foam made with the polyol composition. The 2-chloropropane acts to solubilize the C4-C6 aliphatic hydrocarbon in the polyols.