Carboxy-functional hydrogenated block copolymer dispersed in epo

Details Carboxy-functional hydrogenated block copolymer dispersed in epo Carboxy-functional hydrogenated block copolymer dispersed in epo

1990-03-30

1992-05-19

Bleutge, John C.

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

Synthetic resins

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

525934, C08G 5914, G08L 6302, G08L 6304

Patent

active

051150190

ABSTRACT:
A method for dispersing and stabilizing a carboxy-functionalized butadiene-styrene block copolymer in an epoxy resin is provided comprising the steps of: (a) dispersing from about 5 to about 30 weight percent of a carboxy-functionalized hydrogenated butadiene-styrene block copolymer in a liquid epoxy resin to produce an elastomer-dispersed epoxy resin composition; (b) contacting the elastomer-dispersed epoxy resin composition and from about 15 to about 30 weight percent, based on the weight of the elastomer-modified epoxy resin composition, of a polyhydric phenolic compound in the presence of an advancement catalyst at a temperature within the range of about 40.degree. C. to about 200.degree. C. for time effective for producing a solid elastomer-modified epoxy resin having an epoxy equivalent weight in the range of about 500 to about 1,500; and (c) recovering said solid elastomer-modified epoxy resin. The method provides for impact resistant stable styrene-butadiene block copolymer-modified epoxy resin composition useful for powder coating formulations.

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patent: 4734468 (1988-03-01), Marx
patent: 4778851 (1988-10-01), Henton et al.
patent: 4804581 (1989-02-01), Geary et al.

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