Process for preparing epoxy resins containing triazine groups

Details Process for preparing epoxy resins containing triazine groups Process for preparing epoxy resins containing triazine groups

C - Chemistry, Metallurgy

07

D

260/249, 402/271

C07D 251/34 (2006.01) C08G 59/06 (2006.01) C08G 59/32 (2006.01)

Patent

CA 1259992

ABSTRACT OF THE DISCLOSURE This invention pertains to a process for preparing hydroxyaromatic oligomers containing triazine groups. The process is characterized by (I) reacting (A) a material having an average of more than 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. This invention also pertains to a process for epoxidizing the product from step II by reaction with an epihalohydrin such as epichlorohydrin, dehydro- halogenation of the resultant product with a basic-acting material such as sodium hydroxide and recovering the resultant epoxy resin containing triazine groups.

466383

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