Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1988-08-08
1989-04-18
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253289, 525369, 525378, C08F 810
Patent
active
048228621
ABSTRACT:
4-Acetoxystyrene is homopolymerized and copolymerized in aqueous emulsion and, without isolation, the polymer is hydrolyzed to homopolymers and copolymers of p-vinylphenol with a base. Homopolymers and copolymers of p-vinylphenol are used as epoxy resin curing agents and in the preparation of epoxy resins by reaction with epichlorohydrin.
REFERENCES:
patent: 3970534 (1976-07-01), Fujiwara et al.
patent: 4129617 (1978-12-01), Machi et al.
patent: 4678843 (1987-07-01), Elmore et al.
patent: 4689371 (1987-08-01), Elmore et al.
Keene Donna L.
Rupp Raymond W.
Cassady Donald R.
Hanegan Herbert M.
Hoechst Celanese Corporation
Lipman Bernard
Price Herb P.
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