Patent ID: 6906111

Claim:
A polyurethane foam having a density of at least 0.1 g/cm 3 , a single glass transition temperature within the temperature range of −20° to 60° C., a storage modulus (E′) of 0.5 to 2 MPa and tan δ of 0.16 to 0.5 as obtained from dynamic viscoelasticity at a frequency of 10 Hz and a temperature of 25° C., and wherein said polyurethane foam does not have a glass transition temperature below −20° C., said polyurethane foam being obtained by reacting a polyol component comprising a polyether-polyol having two functional groups and a number-average molecular weight of 3000 to 5000 and a polyether-polyol having three functional groups and a number-average molecular weight of 4000 to 5500 with an isocyanate compound, wherein the weight ratio of polyether-polyol having two functional groups/the polyether-polyol having three functional groups is 35/65 to 65/35.