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US 4,391,965 AGranted
Curing agents
AssigneesImperial Chemical Industries PLC, Hermann Wiederhold GmbH Corp.
InventorsHans R. Falkenburg, Siegfried Krause, Robert C. McGuiness
Life of this patent
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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.
Claims9
A coating composition which comprises in admixture
- (a) a curing agent which is the reaction product of a polycarboxylic acid polyanhydride with a monohydroxy compound ROH, wherein R is alkyl, substituted alkyl, or aralkyl and
- (b) a solution of an epoxy resin which is to be cured.
Dependencies are inferred from the claim text.