Polyurethane elastomer composition

摘要

A polyurethane elastomer product formed by curing a mixture of an NCO terminated urethane prepolymer and a polyhydroxyalkylphosphine oxide. The polyhydroxyalkyl phosphine curative is a compound of the class having the formula: <IMAGE> wherein R is alkylene of 3 to 6 carbon atoms, R1 is alkyl of 2 to 10 carbon atoms, cycloalkyl of 6 to 12 carbon atoms and n is an integer of 2 to 3. Exemplary polyhydroxyalkyl phosphine curatives are (HOCH2CH2CH2)2P(O)-C4H9-sec. and (HOCH2CH2CH2)3P(O).