C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/249, 402/271
C07D 413/14 (2006.01) C07D 251/34 (2006.01) C08G 59/04 (2006.01) C08G 59/06 (2006.01) C08G 59/26 (2006.01) C08G 59/32 (2006.01) C08G 59/40 (2006.01)
Patent
CA 1259993
ABSTRACT OF THE DISCLOSURE This invention pertains to a process for preparing hydroxyaromatic oligomers containing triazine groups and oxazoline groups. The process is characterized by (I) reacting (A) a material having an average of more than one aromatic hydroxyl group per molecule with (B) a cyanogen halide such as cyanogen bromide in the presence of a base and recovering a mixture of cyanate- -containing products and unreacted (A) materials, (II) co-oligomerizing the product resulting from (I) with an epoxy resin in the presence of a suitable co-oligomer- ization catalyst. This invention also pertains to a process for preparing epoxy resins containing both triazine groups and oxazoline groups by epoxidizing a hydroxyaromatic material in a conventional manner by reaction with an epihalohydrin with subsequent dehydro- halogenation with a basic-acting material and finally recovering the resultant glycidyl ether product, characterized in that the hydroxyaromatic material is the resultant co-oligomerization product from step (II) of the earlier process.
466385
Smart & Biggar
The Dow Chemical Company
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