| 摘要 |
Halogenated aromatic polyesters having the recurring structural formula <IMAGE> wherein X is chlorine or bromine and Y is hydrogen, chlorine or bromine, with the provision that when X is chlorine, Y is hydrogen or chlorine and when X is bromine, Y is hydrogen or bromine, R and R' may be the same or different and represent lower alkyl groups, hydrogen, or together constitute a cyclic hydrocarbon group, and n is an integer which is at least about 10, are prepared by (a) reacting in solution in the presence of an excess amount of a tertiary amine (1) a bisphenol having the structural formula <IMAGE> wherein X, Y, R and R' have the same meanings as given above; with (2) an aromatic acid halide selected from the group consisting of terephthaloyl halide, isophthaloyl halide, and mixtures thereof to form a reaction mixture comprising solvent, tertiary amine hydrochloride, unreacted tertiary amine, and the halogenated aromatic polyester, (b) adding to the reaction mixture an amount of gaseous, substantially anhydrous, hydrogen chloride sufficient to substantially completely neutralize the unreacted tertiary amine, and (c) recovering the halogenated aromatic polyester.
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