Manufacture of polyisocyanate prepolymers using ethylene glycol

Details Manufacture of polyisocyanate prepolymers using ethylene glycol Manufacture of polyisocyanate prepolymers using ethylene glycol

1991-11-25

1992-11-17

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521173, 521174, 521182, 521902, C08G 1800

Patent

active

051644223

ABSTRACT:
An isocyanate-terminated quasi-prepolymer is prepared by reacting an organic polyisocyanate and a polyester polyol which comprises the reaction product of a polycarboxylic acid component and ethylene glycol or a mixture of ethylene glycol and at least one other glycol. The use of the quasi-prepolymer in the preparation of rigid cellular polymers, especially polyisocyanurate foams, enhances the thermal insulating properties of the foams, and helps to reduce their cost and blowing agent usage.

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