Process for the preparation of polyisocyanate prepolymers and po

Details Process for the preparation of polyisocyanate prepolymers and po Process for the preparation of polyisocyanate prepolymers and po

1987-04-15

1988-11-22

Kight, John

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 64, 528 66, 528 76, 528 80, 528 83, C08G 1830

Patent

active

047867035

ABSTRACT:
This invention relates to a polyisocyanate prepolymer for polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting toluenediisocyanate with a long chain polyol under conditions such that essentially a 2:1 adduct is formed. Excess toluenediisocyanate is removed prior to forming the elastomer.

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patent: 4507459 (1985-03-01), Schmidt
patent: 4519432 (1985-05-01), Schmidt
patent: 4556703 (1985-12-01), Megna

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