In a flame-retarded foamable styrene-based resin composition comprising a bromine-containing flame retardant, the flame retardant is a mixture of (a) an organic bromine-containing compound having a 2,3-dibromopropyl group or an organic bromine-containing compound having a bromine content of greater than 60 wt% in which all bromine atoms are attached to a benzene ring, and (b) an organic bromine compound having a 2,3-dibromo-2-alkylpropyl group. The composition comprises this mixture in amount from 0.5 to 10 parts by weight per 100 parts by weight of the styrene-based resin. The composition exhibits high flame retardant and heat stabilizing effects yet allowing recycling.
在一种含有含
溴阻燃剂的阻燃发泡
苯乙烯基
树脂组合物中,该阻燃剂是以下两种物质的混合物:(a)具有 2,3-二
溴丙基的含
溴有机化合物或
溴含量大于 60 wt%的含
溴有机化合物,其中所有
溴原子均连接到苯环上;(b)具有 2,3-二
溴-2-烷基丙基的有机
溴化合物。这种混合物的含量为每 100 重量份
苯乙烯基
树脂含 0.5 至 10 重量份。该组合物具有很高的阻燃和热稳定效果,同时还可回收再利用。