Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1983-10-31
1984-12-18
Cockeram, Herbert S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528 92, 528 93, 528 99, 528119, 25218831, C08G 5906, C08G 5920
Patent
active
044892020
ABSTRACT:
Epoxy resins containing triazine groups are prepared by (I) reacting (A) a material having at least one aromatic hydroxyl group per molecule such as bisphenol A with (B) a cyanogen halide such as cyanogen bromide in the presence of (C) a base and recovering a mixture of cyanate-containing products and unreacted (A) materials; (II) trimerizing the product recovered in (I) in the presence of a trimerization catalyst such as cobalt naphthenate and (III) epoxidizing the product from step II by reaction with an epihalohydrin such as epichlorohydrin, dehydrohalogenation of the resultant product with a basic acting material such as sodium hydroxide and recovering the resultant epoxy resin containing triazine groups.
REFERENCES:
patent: 2741607 (1956-04-01), Bradley et al.
patent: 2809942 (1957-10-01), Cooke, Jr.
patent: 2810706 (1957-10-01), Frazier et al.
patent: 2864805 (1958-12-01), Cooke, Jr.
patent: 2971942 (1961-02-01), Masters et al.
patent: 3708483 (1973-01-01), Anderson et al.
patent: 4142034 (1979-02-01), Schroll
Carter J. G.
Cockeram Herbert S.
The Dow Chemical Company
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