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US 7,547,745 B2Granted
Epoxy resin hardener of anhydride copolymer and anhydride-elastomer copolymer
AssigneeDow Global Technologies LLC
InventorLudovic Valette
Life of this patent
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Abstract
A hardener composition useful for curing epoxy resins including a blend of (a) a carboxylic anhydride which is a copolymer of an ethylenically unsaturated anhydride and a vinyl compound; (b) a copolymer of an ethylenically unsaturated anhydride and an elastomer; and optionally (c) a stabilizing agent such as a block copolymer to prevent phase separation of components (a) and (b). The hardener composition is particularly useful in electrical laminates applications.
Claims12
A hardener composition useful for curing a polyepoxide resin comprising a blend of
- (a) a carboxylic anhydride which is a copolymer of an ethylenically unsaturated anhydride and a vinyl compound;
- (b) a copolymer of an ethylenically unsaturated anhydride and an elastomer;
- and
- (c) a stabilizing agent to prevent phase separation of components (a) and (b), wherein the amount of component (b) present in the composition is such that the component (a) to component (b) weight ratio is between about 95:5 and about 83:17.
1 more element
A process for preparing a hardener composition comprising mixing
- (a) a carboxylic anhydride which is a copolymer of an ethylenically unsaturated anhydride and a vinyl compound;
- (b) a copolymer of an ethylenically unsaturated anhydride of an elastomer;
- and
- (c) a stabilizing agent to prevent phase separation of components (a) and (b), wherein the amount of component (b) present in the composition is such that the component (a) to component (b) weight ratio is between about 95:5 and about 83:17.
1 more element
Dependencies are inferred from the claim text.