Epoxy resins adducted with reactive liquid rubber having...

Details Epoxy resins adducted with reactive liquid rubber having... Epoxy resins adducted with reactive liquid rubber having...

2008-06-20

2010-12-07

Eashoo, Mark (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...

C525S050000, C525S055000, C525S107000, C525S540000

Reexamination Certificate

active

07847026

ABSTRACT:
A blend of epoxy resins includes a) an epoxy resin composition derived from the reaction of a liquid epoxy resin, a carboxyl terminated butadiene (CTB), and a carboxyl terminated polybutadiene-acrylonitrile (CTBN) and/or a random and terminal carboxyl functional polybutadiene-acrylonitrile (CTBNX), and b) unreacted epoxy resin. The carboxyl terminated butadiene is miscible with the unreacted epoxy resin and does not separate therefrom even upon aging. Upon cure as with a latent cure agent, a toughened epoxy resin is produced having unexpected good low temperature properties such as peel strength.

REFERENCES:
patent: 3914334 (1975-10-01), Lubowitz et al.
patent: 5280068 (1994-01-01), Siebert et al.
patent: 59058024 (1984-04-01), None
patent: 07138344 (1995-05-01), None
Noveon, Product Data Sheets: Hycar Reactive Liquid Polymers CTBN 1300X8 & CTBN 1300X8F, 2009, Noveon.
English translation of JP Patent Pub No. 59-058024 A, Azuma et al, Apr. 3, 1984.
English machine translation of JP Patent Pub No. 07-138344, Makise, H., May 30, 1995.

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