Process for the manufacture of heat-stable, nuclear-brominated p

Details Process for the manufacture of heat-stable, nuclear-brominated p Process for the manufacture of heat-stable, nuclear-brominated p

1979-01-02

1980-04-29

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525358, C08F 820, C08F 822

Patent

active

042007038

ABSTRACT:
In a process for the manufacture of a heat-stable, nuclear-brominated polystyrene by brominating, at -20.degree. C. to +40.degree. C., a polystyrene dissolved in a chlorinated hydrocarbon in the presence of a Lewis acid catalyst, an improvement is provided wherein the catalyst further comprises 0.02 to 2 moles, per mole of Lewis acid, of a nucleophilic substance which acts as a Lewis base for the Lewis acid.

REFERENCES:
patent: 3039977 (1962-06-01), Ingram
patent: 3050476 (1962-08-01), Tress et al.
patent: 4074032 (1978-02-01), Naarmann et al.
patent: 4143221 (1979-03-01), Naarmann
Rubber Age-Molecular Weight Jump Reaction; Dec. 1964; pp. 410-415.
Friedel-Crafts and Related Reactions; 1963; Olah; Interscience; pp. 206, 242, 243, 259.

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