Patent ID: 8158692

Claim:
A polyurethane foam for use in a steering wheel of a vehicle, comprising: (a) 100 weight parts of a polyol comprising: 60.0-95.0 wt % of a polyol A having three functional groups and OH value of 20-40 mgKOH/g; 2.0-10.0 wt % of a polyol B having two functional groups and OH value of 50-400 mgKOH/g; 1.0-10.0 wt % of a polyol C having four functional groups and OH value of 500-800 mgKOH/g; and 2.0-20 wt % of a polyol D having three functional groups, OH value of 10-30 mgKOH/g and solid value of 30-50%, wherein polyol A is different than polyol D, wherein the wt % are relative to the total weight of polyol; (b) 30-70 weight parts of an isocyanate comprising 0.1-30 wt % of monomeric methylene diphenyl diisocyanate (MMDI); 5-70 wt % of carbodiimide-containing methylene diphenyl diisocyanate; 0.1-90 wt % of polymeric methylene diphenyl diisocyanate (PMDI); and 0.1-90 wt % of a methylene diphenyl diisocyanate (MMDI) prepolymer, wherein the wt % are relative to the total weight of isocyanate; (c) 1-10 weight parts of glycol having OH value of 1500-2500 mgKOH/g; (d) 0.1-1.0 weight parts of butandiol; (e) 0-5 weight parts of glycerol; and (f) 0.01-4 weight parts of water.