Processes for preparing hydroxyaromatic oligomers containing triazine groups and for preparing epoxy resins from the oligomers
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0143988A2
公开(公告)日:1985-06-12
This invention pertains to a process for preparing hydroxyaromatic oligomers containing triazine groups. The process is characterized by (1) 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 (1) 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, dehydrohalogenation of the resultant product with a basic-acting material such as sodium hydroxide and recovering the resultant epoxy resin containing triazine groups.
本发明涉及一种制备含有三嗪基团的羟基芳香族低聚物的工艺。该工艺的特点是:(1)在(C)碱存在下,使(A)每分子平均具有一个以上芳香羟基(如双酚 A)的材料与(B)卤化氰(如溴化氰)反应,并回收含氰酸酯的产物和未反应的(A)材料的混合物;(2)在三聚催化剂(如环烷酸钴)存在下,对(1)中回收的产物进行三聚。本发明还涉及一种工艺,通过与环氧氯丙烷等表卤代醇反应,将步骤 II 中的产物环氧化,用氢氧化钠等碱性作用物质对所得产物进行脱氢卤化,并回收所得含三嗪基团的环氧树脂。
A process for preparing vinyl ester resins containing triazine or both triazine and oxazoline groups
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0156959A1
公开(公告)日:1985-10-09
This invention pertains to a process for preparing vinyl ester resins containing triazine groups or both triazine and oxazoline groups prepared by reacting a polyepoxide with 0.75 to 1, preferably from 0.9 to 1, moles of a monounsaturated monocarboxylic acid or mixture of monounsaturated monocarboxylic acids per epoxide group in the presence of a suitable quantity of a suitable catalyst. The process is characterized in that the polyepoxide is (a) a polyepoxide containing triazine groups, or (b) a polyepoxide containing both triazine and oxazoline groups, or (c) a mixture of (a) and (b).
Process for preparing hydroxyaromatic oligomers containing both triazine and oxazoline groups and for preparing epoxy resins from the oligomers
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0150278A2
公开(公告)日:1985-08-07
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.
A process for preparing advanced epoxy resins containing triazine or both triazine and oxazoline groups
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0153449A2
公开(公告)日:1985-09-04
This invention pertains to a process for preparing advanced epoxy resins which contain triazine groups or both triazine and oxazoline groups. When cured, these resins have higher heat distortion temperatures and'or higher elongation values than advanced epoxy resins which do not contain triazine groups or triazine and oxazoline groups.