Epoxy resin hardener of anhydride copolymer and...

Details Epoxy resin hardener of anhydride copolymer and... Epoxy resin hardener of anhydride copolymer and...

2008-01-11

2009-06-16

Sellers, Robert (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S065000

Reexamination Certificate

active

07547745

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.

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