Patent ID: 7511082

Claim:
A polyurethane foam, manufactured by simultaneously mixing and foaming a polymer polyol composition and polyisocyanate, wherein the polyisocyanate comprises 2,4-toluene diisocyanate and 2,6-toluene diisocyanate; wherein the polymer polyol composition comprises: at least one polycarbonate polyol comprising three hydroxyl groups which is a polymer produced from at least diol monomer, wherein the at least diol monomer from which the polycarbonate polyol comprising three hydroxyl groups is produced comprises 3-methyl-1,5-pentanediol and 1,6-hexanediol, and a polycarbonate diol having two hydroxyl it groups which is a polymer produced from at least diol monomer, wherein said at least diol monomer from which the polycarbonate diol is produced comprise at least one member selected from the group consisting of 3-methyl-1,5-pentanediol and 2-methyl-1,8-octanediol and optionally further comprise a member of the group consisting of 1,6-hexanediol and 1,9-nonanediol; with the weight ratio of the polycarbonate diol having two hydroxyl groups to the polycarbonate polyol having three hydroxyl groups being from 40:60 to 95:5, wherein the average molecular weight of the polycarbonate polyol is 3000 and the average molecular weight of the polycarbonate diol is 2000.