Disclosed are novel bis- or poly-(bromo-4-methylphenoxy)-alkanes and -alkenes having the formula (1)
wherein
n is an integer of from 1 to 6,
m is 2 (n + z) - y,
x is an integer of from 1 to 4,
y is an integer of from 2 to 4 and
z is 0 or 1,
and a process for preparing said compounds by reacting alkali salts of nucleus-brominated p-cresols with bis- or poly-haloalkanes or -alkenes, preferably in a glycol monoalkylether as reaction medium. The materials are employed as UV-stable low-migrating fire-protective agents for thermoplastic synthetic materials, and more specifically for polybutylene terephthalate or acrylonitrile-butadiene-copolymer molding compositions, in combination with antimony trioxide.
本发明涉及一种新型的双-或多-(
溴-4-甲基苯氧基)-烷和-烯,其
化学式为(1),其中n为1至6的整数,m为2(n+z)-y,x为1至4的整数,y为2至4的整数,z为0或1。本发明还涉及一种制备上述化合物的方法,即将核
溴化
对甲酚的碱盐与双-或多卤代烷或烯反应,优选反应介质为单一烷基醚。这些材料可用作热塑性合成材料的UV稳定低迁移防火剂,更具体地用于聚
对苯二甲酸丁二酯或
丙烯腈-
丁二烯共聚物模塑组合物,与
三氧化二锑结合使用。