FOAMED MATERIALS COMPRISING A MATRIX HAVING A HIGH HARDBLOCK CONTENT AND PROCESS FOR PREPARING THEM

摘要

Foamed material having a density of less than 100 kg/m3 and comprising - a matrix material comprising a plurality of urea 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 a polymer having an average molecular weight of more than 500 which polymer comprises at least 50 % by weight of oxyethylene groups based on the weight of this polymer (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 70:30 and process for making such materials.