ELASTOMERIC MATERIALS HAVING A HIGH HARDBLOCK CONTENT AND PROCESS FOR PREPARING THEM

摘要

Elastomeric material having a density of more than 100 kg/m3 and comprising - a matrix material comprising a plurality of urethane, urea and/or isocyanurate groups and having a hardblock content of more than 50 % (hereinafter called matrix A); and - 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 A, and 3) is the reaction product of a polyisocyanate and a polymer having an average molecular weight of more than 500 and one isocyanate -reactive group at an isocyanate index of 100-250 (hereinafter called polymeric material B); and wherein the relative amount of all ingredients used to make said matrix A and of said polymeric material B, on a weight basis, ranges from 10:90 to 90:10 and process for making such materials.