Patent ID: 7378454

Claim:
A polyurethane composition, comprising: 3 to 25% by weight based on the total composition of solid and not hollow beads of a particle size of from about 0.1 to 100 μm comprising a hygroscopic organic polymeric material that is selected from the group consisting of one or more of polyphenol having methylol groups, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol, polyacrylic acid and partially hydrolyzed polyacrylate and is swellable or soluble in an aqueous medium, the beads being dispersed in a microcellular polyurethane foam having microcells and containing a silicon surfactant as a foam regulator, wherein the composition has a storage modulus of elasticity at 40° C. of 270 MPa or more as measured by a dynamic viscoelasticity measuring device, and the density of the polyurethane composition is 0.67 to 0.90 g/cm 3 .