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AssigneeAkzona Incorporated
InventorsHendrik Harm Jannes Oosterwijk, Ulfert Elle Wiersum, Eduard Pieter Magre, Johannes Hendrinus VAN Dijk
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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: ##STR1## A is a thienylene group or an arylene group such as a substituted or unsubstituted phenylene, biphenylene, napthylene, or anthracylene group, R.sub.1 through R.sub.4 a methyl group substituted or not with bromine, R.sub.5 and R.sub.6 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.
A brominated polydiisopropylarylene compound having a molecular structure of the following formula ##STR5## A is an arylene group, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are methyl groups or methyl groups substituted with bromine, R.sub.5 and R.sub.6 are bromine or hydrogen, and n a whole number 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 percent by weight.
A new product having the formula ##STR6## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are methyl, bromomethyl, dibromomethyl or tribromomethyl and are the same or different from each other, R.sub.5 and R.sub.6 are bromine or hydrogen and are the same or different from each other, n is a whole number of 2 to 10, A is phenylene, biphenylene, naphthylene, or anthracylene, unsubstituted or substituted with an alkyl group having 1 to 4 carbon atoms, bromine or chlorine, the number of bromine atoms per molecule on the aliphatic groups being at least 2 and the total bromine content being not more than 70 percent by weight of the product.
Dependencies are inferred from the claim text.