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-oligomerization 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 dehydrohalogenation 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.
本发明涉及一种制备含有三嗪基团和
噁唑啉基团的羟基芳香族低聚物的工艺。该工艺的特点是:(I) 在碱存在下,使(A)平均每个分子具有一个以上芳香羟基的材料与(B)卤化
氰,如
溴化氰反应,并回收含
氰酸酯产物和未反应的(A)材料的混合物;(II) 在适当的共聚合催化剂存在下,使(I)产生的产物与环氧
树脂共聚合。本发明还涉及一种制备同时含有三嗪基团和
噁唑啉基团的环氧
树脂的工艺,其方法是以传统方式将羟基芳香族材料环氧化,与表卤代醇反应,随后与碱性作用材料进行脱氢卤化,最后回收所得
缩水甘油醚产品,其特征在于羟基芳香族材料是前述工艺步骤(II)的共聚合产物。