Process for producing brominated acenaphthylene condensates

Details Process for producing brominated acenaphthylene condensates Process for producing brominated acenaphthylene condensates

C - Chemistry, Metallurgy

07

C

260/653.1, 204/9

C07C 25/22 (2006.01) C07C 17/25 (2006.01)

Patent

CA 1240707

ABSTRACT Brominated acenaphthylene condensates having a general formula: Image wherein x represents an integer from 1 to 2, y is an integer from 1 to 6 and n is 1 or more, are produced by brominating the side chain of acenaphthene with 0.2 to 2.0 times as much moles of bromine as acenaphthene under ultraviolet irradiation or in the presence of a radical initiator in a halogenated hydrocarbon solvent, adding a Lewis acid catalyst to the reaction solution, in which the bromination has been effected to condense the brominated acenaphthene, then adding to the reaction solution an equimolar or more amount of bromine to the acenaphthene to further brominate and condense the brominated acenaphthene or brominated acenaphthene condensates, and thereafter dehydrobrominating the brominated acenaphthene condensates. The brominated acenaphthylene condensates produced in accordance with the invention have excellent radiation-resisting and fire-retarding properties.

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