| 摘要 |
Novel brominated polydiisopropylarylene compounds which can be used for imparting fire retardance properties to polymers such as polystyrene and polypropylene contain bromine as a substituent on the aliphatic radicals and have the following formula: <IMAGE> A is a thienylene group or an arylene group such as a substituted or unsubstituted phenylene, biphenylene, napthylene, or anthracylene group, R1 through R4 a methyl group substituted or not with bromine, R5 and R6 a bromine atom or a hydrogen atom, and n a whole number in the range of 2 to 10, the number of bromine atoms per molecule in the aliphatic groups being at least 2 and the total bromine content being not more than 70 per cent by weight.
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