TERMINATING BROMINATION OF STYRENIC POLYMER IN A BROMINATION REACTION MIXTURE

摘要

A brominated styrenic polymer reaction mixture containing at least (i) brominated styrenic polymer, (ii) bromination reaction solvent, (iii) hydrogen bromide, and (iv) Lewis acid bromination catalyst, and an aqueous medium in an amount sufficient to deactivate the Lewis acid catalyst but insufficient to form a separate continuous liquid phase in the resultant mixture are mixed together to terminate bromination. The advantages of using such small amounts of aqueous medium, as well as various follow on procedures are described.