Patent ID: 9556305
Date: 2017-01-31
CPC Classifications: C08G,C08K

Claim:
1. A non-cytotoxic crosslinked soft polyurethane elastomer composition comprising the reaction product of: (a) at least one hydroxyl terminated polyether, wherein said polyether has a functionality of greater than 2, and wherein said polyether is a triol having a number average molecular weight of from 500 to 700 Daltons, said polyether triol being present at a level of from 5 to 12 weight percent, based on the total weight of said composition; (b) at least one hydroxyl terminated polyether diol, wherein said diol has a number average molecular weight of from 4,000 to 12,000 Daltons; (c) at least one polyether prepolymer terminated with a diisocyanate; and (d) at least one zinc based catalyst suitable to react (a), (b) and (c) above to form a crosslinked soft polyurethane elastomer, wherein the zinc based catalyst is present at a level of from 0.25 to 0.6 weight percent of said composition; wherein said crosslinked soft polyurethane elastomer composition has a hardness from 15 Shore 00 to 50 Shore A, as determined according to ASTM D2240.