| 摘要 |
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.
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