Polyisocyanate-modified dicarboxylic (poly) anhydrides

Details Polyisocyanate-modified dicarboxylic (poly) anhydrides Polyisocyanate-modified dicarboxylic (poly) anhydrides

1995-07-19

1996-07-09

Sellers, Robert E.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525440, 528 68, 528 84, C08G 1834

Patent

active

055346014

ABSTRACT:
Polyisocyanate-modified dicarboxylic (poly)anhydrides which are solid below 40.degree. C., liquid above 120.degree. C. and based on the reaction product of organic polyisocyanates with more than equivalent quantities, based on the NCO/COOH reaction, of dicarboxylic (poly)anhydrides containing free carboxyl groups and optional subsequent modification of the reaction product with less than equivalent quantities, based on the anhydride groups, of anhydride-reactive amino and/or hydroxyl groups; and powder coating compositions containing as binder these polyisocyanate-modified dicarboxylic (poly)anhydrides as curing agents for polyepoxides.

REFERENCES:
patent: 4124568 (1978-11-01), Zecher et al.
patent: 5055524 (1991-10-01), Pettit, Jr. et al.
patent: 5270391 (1993-12-01), Miyazaki et al.
patent: 5371167 (1994-12-01), Rehfuss et al.
Derwent accession No. 73-3180U/22 for Japanese Patent No. 73-17477, Furukawa Electric Co. Ltd., 1973.

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