Patent ID: 8183302

Claim:
A polyether polyol composition for use in preparing visco-elastic polyurethane foams, comprising: (a) a polyether polyol having a hydroxyl functionality of 3, an OH number in the range of from 210 to 255 mg of KOH/g and a PO content in the range of from 90 to 100% by weight; (b) a polyether polyol whose polyol starting molecule is not derived from a renewable raw material, having a hydroxyl functionality of 2, an OH number in the range of from 41 to 71 mg of KOH/g and a PO content in the range of from 90 to 100% by weight; (c) a polyether polyol having a hydroxyl functionality of 2, an OH number in the range of from 92 to 132 mg of KOH/g and a PO content in the range of from 90 to 100% by weight; and (d) at least one renewable raw material wherein each molecule of raw material has at least one free OH group wherein the proportion of (d) in said polyether polyol composition is in the range of from 5 to 50% by weight.