Brominated syndiotactic styrenic polymers and method for mak ing and using same

摘要

The present invention provides a new and improved flame-retardant additive comprising a brominated syndiotactic styrenic polymer and a method of making and using the same. The additive has a melting temperature in excess of about 325 DEG C and it displays a noncrystalline order. The method of making the additive 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.