Polyisocyanate-modified polycarboxylic acids and their use as cr

Details Polyisocyanate-modified polycarboxylic acids and their use as cr Polyisocyanate-modified polycarboxylic acids and their use as cr

1998-04-16

1999-09-28

Gorr, Rachel

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...

528407, 528418, 525408, 25218228, C08G 1834

Patent

active

059590602

ABSTRACT:
The present invention relates to polyisocyanate-modified dicarboxylic acid derivatives obtainable by reacting organic polyisocyanates with excess quantities, based on the equivalent ratio of NCO/COOH groups, of dicarboxylic acid (poly)anhydrides containing free carboxyl groups and water. The present invention also relates to coating compositions, in particular powder coating compositions, containing these polyisocyanate-modified dicarboxylic acids as curing agents for resins containing epoxy groups.

REFERENCES:
patent: 5371167 (1994-12-01), Rehfuss et al.
patent: 5492955 (1996-02-01), Wamprecht et al.
patent: 5534601 (1996-07-01), Reuter et al.
patent: 5574112 (1996-11-01), Kranig et al.
Patent Abstract s of Japan, vol. 004, No. 081 (C-014), Jun. 11, 1980 & JP 55 045759 A (Kansai Paint Co., Ltd.) Mar. 31, 1980.
Database WPI, AN 19677, XP002071028 "granule composite resin composition preparation" and JP 60 060 127 A (Hitachi Chemical) Apr. 6, 1985.

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