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US 5,602,274 AGranted
Polyanhydride containing non-cyclic anhydride moieties
AssigneeThe Dow Chemical Company
InventorsMichael L. Gould, David A. Grilli, Marvin L. Dettloff, Richard A. Hickner, James A. Rabon
Life of this patent
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Abstract
A polyanhydride having a molecular weight of no more than about 2000 is useful in a coating composition with a coreactant resin such as an epoxy resin and comprises: (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 moleties bonded to the divalent organic moleties.
Claims19
A polyanhydride having a molecular weight of less than about 2000 that comprises:
- (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;
- (d) non-cyclic anhydride moieties bonded to the divalent organic moieties and
- (e) bonded to each non-cyclic anhydride moiety, a hydrogen atom or a lower alkyl group containing from 1 to 6 carbon atoms.
2 more elements
Dependencies are inferred from the claim text.