Patent ID: 6355721
Filing Date: 2002-03-12
Classification: C08G,C08L

Abstract:
A high molecular weight, liquid, non-migrating, non-functional polyether polyurethane plasticizer having a viscosity of less than about 50,000 mPaÂ·s at 25Â° C., and comprising the reaction product of(1) an isocyanate prepolymer having an NCO group content of less than 13% which comprises the reaction product of: (a) a diisocyanate having an NCO group content of about 32.0 to about 60.0%, and a functionality of about 2.0; and (b) at least one polyether polyol having a molecular weight of about 1,000 to less than about 5,000, an OH number of about 23 to about 168 and a functionality of from about 2 to about 3; wherein component (1)(a) and (1)(b) are present in amounts such that the NCO:OH equivalent ratio is from about 2:1 to about 7:1; and (2) a monofunctional alcohol having a molecular weight of about 32 to about 1,000, and an OH number of about 56 to about 1750.