Process for copolymerization of bicyclic amide acetals and polyi

Details Process for copolymerization of bicyclic amide acetals and polyi Process for copolymerization of bicyclic amide acetals and polyi

1987-01-20

1988-01-26

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 56, 528 57, 528 73, C08G 1830

Patent

active

047217677

ABSTRACT:
An improved process for the copolymerization of a mixture of a bicyclic amide acetal and a polyisocyanate comprising carrying out the copolymerization reaction at a temperature in the range of from about ambient temperature up to about 200.degree. C. in the presence of a catalytic amount of a salt of a metal selected from the group consisting of bismuth, lead, mercury, copper, vanadium, cobalt, nickel, potassium, zinc and antimony is described.

REFERENCES:
patent: 4016113 (1977-04-01), Preston et al.
patent: 4438248 (1984-03-01), Christman et al.
patent: 4562240 (1985-12-01), Goel et al.

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