Isocyanate-terminated prepolymers with low free monomer contents

Details Isocyanate-terminated prepolymers with low free monomer contents Isocyanate-terminated prepolymers with low free monomer contents

1982-09-29

1983-11-01

Welsh, Maurice J.

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 60, 528 65, 528 75, 528 76, 528 80, 528 83, 528 85, C08G 1810

Patent

active

044131119

ABSTRACT:
The present invention is directed to a process for the preparation of an isocyanate-terminated prepolymer having a content of unreacted diisocyanate of less than about 2% by weight, preferably less than about 1% by weight, based on the weight of the isocyanate-terminated prepolymer, and containing internal urethane groups based on 4,4'-diisocyanato-dicyclohexyl-methane by

REFERENCES:
patent: 4184005 (1980-01-01), Bauriedel et al.
patent: 4195009 (1980-03-01), Zimmermann
patent: 4211804 (1980-07-01), Brizzolara
patent: 4247675 (1981-01-01), Fukuda et al.
patent: 4254168 (1981-03-01), Monson
patent: 4273912 (1981-06-01), Harmer
patent: 4282123 (1981-08-01), Ilaria
patent: 4292350 (1981-09-01), Kubitza et al.

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