Patent · US Expired

Curing agents

US4391965A · kind A · utility

9Cited by

5References

9Claims

0Family size

Assignees

IMPERIAL CHEMICAL INDUSTRIES LIMITED · GB
Hermann Wiederhold G.m.b.H. Corp. · DE

Inventors

Hans R. Falkenburg · Haan, DE
Siegfried Krause · Ostelsheim, DE
Robert C. McGuiness · Erkrath, DE

Key dates

Filing date	Oct 26, 1981
Grant date	Jul 5, 1983
Priority date	—
Expiry date	Oct 26, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31529
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A modified polycarboxylic acid polyanhydride curing agent suitable for curing epoxy resins which is prepared by reacting a polycarboxylic acid anhydride with a monohydroxy compound ROH; and coating compositions, comprising the modified curing agent and a solution of an epoxy resin to be cured, which have improved storage stability.

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