Patent ID: 8519062

Claim:
An elastomeric material having a density of more than 100 kg/m 3 and comprising: (a) a matrix material comprising a plurality of urethane, urea and/or isocyanurate groups and having a hardblock content of more than 50%; and (b) a polymeric material which 1) has no groups which are able to form a urethane, urea or isocyanurate group with an isocyanate group, 2) is interpenetrating said matrix, and 3) is the reaction product of a polyisocyanate and a polymer having one isocyanate-reactive group at an isocyanate index of 100-250; and wherein the relative amount of all ingredients used to make said matrix and said polymeric material, on a weight basis, ranges from 10:90 to 90:10; and wherein the polymeric material is the reaction product of an aromatic polyisocyanate and a polymer having an average molecular weight of 800-3000 which comprises monoamines and/or monocarboxylic acids having polyester, polyether and/or polyolefin backbones, or mixtures thereof.