Patent · US Expired

Polyisocyanate-modified dicarboxylic (poly) anhydrides

US5534601A · kind A · utility

3Cited by

4References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Knud Reuter · Krefeld, DE
Walter Schafer · Leichlingen, DE
Hanns P. Muller · Leverkusen, DE
Hans-Ulrich Meier-Westhues · Leverkusen, DE
Lothar Kahl · Bensberg, DE
Manfred Bock · Leverkusen, DE

Key dates

Filing date	Jul 19, 1995
Grant date	Jul 9, 1996
Priority date	—
Expiry date	Jul 19, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2150/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.