Preparation of bromine-containing polymers and their application as flame retardants
申请人:Bromine Compounds Ltd.
公开号:US10227531B2
公开(公告)日:2019-03-12
The invention provides a process for preparing bromine-containing polymers, comprising a Friedel-Crafts alkylation reaction of pentabromobenzyl halide with a polymer reactant which contains one or more six-membered aromatic ring(s) in its repeat unit, in the presence of at least one Friedel-Crafts catalyst. The so-formed bromine-containing polymers, having pendent —CH2C6Br5 groups attached to at least a portion of the six-membered aromatic rings of the polymer, with a carbon ring atom of said six-membered aromatic ring being bonded to the aliphatic carbon of said —CH2C6Br5 pendent group, are also provided. These bromine-containing polymers are useful as flame retarding agents.
本发明提供了一种制备含溴聚合物的工艺,包括在至少一种 Friedel-Crafts 催化剂存在下,五溴卤化苄与在其重复单元中含有一个或多个六元芳香环的聚合物反应物进行 Friedel-Crafts 烷基化反应。这样形成的含溴聚合物,其-CH2C6Br5 垂足基团至少连接到聚合物六元芳香环的一部分,所述六元芳香环的碳环原子与所述-CH2C6Br5 垂足基团的脂肪族碳键合。这些含溴聚合物可用作阻燃剂。