Patent ID: 7795322

Claim:
A cellular polyisocyanate polyadduct prepared by (1) reacting (a) one or more diisocyanates with (b) one or more polyether alcohols to form a prepolymer comprising isocyanate groups and an NCO content of less than 10%, and (2) reacting said prepolymer in a mold with a crosslinking component comprising (e) water and, optionally, (d) one or more sulfated fatty acid esters; wherein said (b) one or more polyether alcohols comprises a mixture of (b1) and (b3) and optionally (b2), wherein: (b1) is a polytetrahydrofuran having a molecular weight of from 1800 to 2100 g/mol; and (b2) is a polyether alcohol having a molecular weight of from 500 to 7000 g/mol, based on ethylene oxide and/or propylene oxide; and (b3) is a polytetrahydrofuran having a molecular weight of from 800 to 1200 g/mol wherein said cellular polyisocyanate polyadduct has a density, according to DIN EN ISO 845, of from 200 to 800 kg/m 3 ; a tensile strength, according to DIN EN ISO 1798, of greater than or equal to 2.0 N/mm 2 ; an elongation at break, according to DIN EN ISO 1798, of greater than or equal to 200%; and a tear propagation resistance, according to DIN ISO 34-1 B (b), of greater than or equal to 8 N/mm.