PROCESSES FOR PREPARING HYDROXYAROMATIC OLIGOMERS CONTAINING BOTH TRIAZINE AND OXAZOLINE GROUPS AND FOR PREPARING EPOXY RESINS FROM THE OLIGOMERS

摘要

ABSTRACT OF THE DISCLOSUREThis invention pertains to a process forpreparing hydroxyaromatic oligomers containing triazinegroups and oxazoline groups. The process is characterizedby (I) reacting (A) a material having an average ofmore than one aromatic hydroxyl group per molecule with(B) a cyanogen halide such as cyanogen bromide in thepresence of a base and recovering a mixture of cyanate--containing products and unreacted (A) materials, (II)co-oligomerizing the product resulting from (I) with anepoxy resin in the presence of a suitable co-oligomer-ization catalyst. This invention also pertains to aprocess for preparing epoxy resins containing bothtriazine groups and oxazoline groups by epoxidizing ahydroxyaromatic material in a conventional manner byreaction with an epihalohydrin with subsequent dehydro-halogenation with a basic-acting material and finallyrecovering the resultant glycidyl ether product,characterized in that the hydroxyaromatic material isthe resultant co-oligomerization product from step (II)of the earlier process.