申请人:Teijin Chemicals, Ltd.
公开号:EP0899254A2
公开(公告)日:1999-03-03
A high-purity bromine compound which is useful as flame retardant, can be obtained industrially advantageously by a process comprising reacting bromine with an aliphatically unsaturated compound of formula (1) :
R1-O-Ar1-Y-Ar2-O-R2 (1)
to produce a bromine compound of formula (2):
R3-O-Ar1-Y-Ar2-O-R4 (2)
wherein in each formula Ar1 and Ar2 are independently a C5-16 aromatic hydrocarbon or a C5-12 saturated alicyclic hydrocarbon, and Y is a C1-6 saturated hydrocarbon, a sulfone, sulfide, ketone or C2-6 alkylene oxide or is a single bond;
R1 and R2 are each independently a C2-11 hydrocarbon group which is at least partially unsaturated; and R3 and R4 are groups obtained by saturating with a bromine atom the unsaturated groups of R1 and R2 respectively,
wherein the reaction is carried out in the presence of a solvent which is inactive in the reaction, and a substantial amount (e.g. 80% or more) of reaction heat is removed from the reaction system by the vaporization heat of the solvent or bromine.
一种可用作阻燃剂的高纯度溴化合物,可通过溴与式(1)脂肪族不饱和化合物反应的工艺获得,这在工业上是非常有利的:
R1-O-Ar1-Y-Ar2-O-R2 (1)
生成式 (2) 的溴化合物:
R3-O-Ar1-Y-Ar2-O-R4 (2)
其中,在每个式中,Ar1 和 Ar2 独立地为 C5-16 芳烃或 C5-12 饱和脂环烃,Y 为 C1-6 饱和烃、砜、硫醚、酮或 C2-6 环氧亚烷基或单键;
R1 和 R2 各自独立地为至少部分不饱和的 C2-11 烃基;以及 R3 和 R4 分别为通过用溴原子饱和 R1 和 R2 的不饱和基团而得到的基团、
其中,反应是在溶剂存在下进行的,溶剂在反应中不活泼,大量(例如 80% 或更多)的反应热通过溶剂或溴的汽化热从反应体系中带走。