Acid containing isocyanate-terminated prepolymers, salt prepolym

Details Acid containing isocyanate-terminated prepolymers, salt prepolym Acid containing isocyanate-terminated prepolymers, salt prepolym

1989-06-23

1990-10-16

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...

560157, 560158, C08G 1806

Patent

active

049636375

ABSTRACT:
The present invention is directed to novel isocyanate-terminated prepolymers of carboxylic acid grafted polyethers, salts of these prepolymers and fully reacted polymers formed therefrom. More specifically, the present invention relates to reacting an ethylenically unsaturated mono-carboxylic acid with a polyether in the presence of a free radical initiator to form a graft copolymer. Acid-containing isocyanate-terminated prepolymers can then be formed by reacting the graft copolymer with an isocyanate. Salt-containing isocyanate-terminated prepolymers are prepared through the reaction between the acid-containing prepolymer and a base. Finally, polymers are formed by curing either of these isocyanate-terminated prepolymers with an isocyanate reactive material.

REFERENCES:
patent: 4207227 (1989-06-01), von Bonin
patent: 4250077 (1981-02-01), von Bonin et al.
patent: 4460738 (1984-07-01), Frentzel et al.
patent: 4521615 (1985-06-01), Frentzel
patent: 4528334 (1985-07-01), Knopf et al.
patent: 4701474 (1987-10-01), Bailey, Jr. et al.

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