Method for making brominated syndiotactic styrenic polymers

Details Method for making brominated syndiotactic styrenic polymers Method for making brominated syndiotactic styrenic polymers

1995-04-06

1997-04-01

Lipman, Bernard

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

Synthetic resins

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

5253289, 5253307, 5253314, 5253334, 525356, 525357, C08F 822

Patent

active

056166567

ABSTRACT:
The present invention provides a new method for making an improved flame-retardant additive comprising a brominated syndiotactic styrenic polymer. The method includes the steps of providing a source of syndiotactic styrenic polymer; providing a source of inert reaction medium that is not capable of dissolving to any appreciable degree the syndiotactic styrenic polymer at ambient temperature and pressure; providing a source of brominating agent; providing a source of Lewis acid catalyst; mixing the syndiotactic styrenic polymer with the inert reaction medium and the Lewis acid catalyst; and reacting the syndiotactic styrenic polymer with the brominating agent to produce a brominated syndiotactic styrenic polymer.

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Candia et al., "Noncrystalline Order in Swollen Syndiotactic Polystyrene," Macromolecules, vol. 25, No. 23, 1992, pp. 6361-6364.

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