申请人:Ethyl Corporation
公开号:US04686311A1
公开(公告)日:1987-08-11
A process for the preparation of bromostyrenes which comprises aqueous alcoholic alkali dehydrohalogenation of a 1-haloethyl bromobenzene, a 2-haloethyl bromobenzene, or a 1-methyl-2-haloethyl brominated benzene in the presence of a phase transfer catalyst at a temperature of between about 0.degree. C. and about 150.degree. C. The bromostyrenes have the particular utility as a comonomer for the preparation of a co-polymer exhibiting a flame retardancy. Both bromostyrenes and brominated alpha-methyl styrenes are formed.
制备溴苯乙烯的方法包括在相转移催化剂存在下,在温度在约0℃到约150℃之间的条件下,对1-卤乙基溴苯、2-卤乙基溴苯或1-甲基-2-卤乙基溴代苯进行水醇性碱脱卤化反应。溴苯乙烯可用作共聚物的共聚单体,以实现阻燃性。同时,产生溴代α-甲基苯乙烯和溴苯乙烯。