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US 5,633,020 AGranted
Coating composition of non-cyclic polyanhydride and co-reactant resin
AssigneeThe Dow Chemical Company
InventorsMichael L. Gould, David A. Grilli, Marvin L. Dettloff, Richard A. Hickner, James A. Rabon
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Abstract
A coating composition with a solids content of at least about 65% by weight comprises a polyanhydride having more than one non-cyclic anhydride moiety, a co-reactant resin such as a glycidyl (meth)acrylate-containing polymer and a latent catalyst wherein the equivalent ratio of epoxy to anhydride is from about 0.8:1 to 1.3:1.
Claims9
A curable coating composition comprising organic solvent and:
- (a) a polyanhydride having a molecular weight of no more than about 1,500 that contains:
- (a ) a polyvalent organic moiety,
- (b) a plurality of ester linkages bonded to the polyvalent organic moiety,
- (c) divalent organic moieties bonded to the ester linkages and
- (d) non-cyclic anhydride moieties bonded to the divalent organic moieties
- (b) a co-reactant resin having a weight average molecular weight of about from 2,000 to 20,000 and comprising about 30 to about 70 weight percent glycidyl acrylate or glycidyl methacrylate;
- and
- (c) a functional amount of at least one latent catalyst,
- wherein the composition has a solids content of at least about 65 weight percent and wherein the equivalent ratio of epoxy to anhydride is about from 0.8:1 to 1.3:1.
6 more elements
Dependencies are inferred from the claim text.