Preparation of bromine-containing polymers and their application as flame retardants

US10227531B2 · kind B2 · utility

Assignee

• BROMINE COMPOUNDS LTD. · IL

Inventors

• Mark Gelmont · Haifa, IL
• Michael Yuzefovich · Haifa, IL
• David Yoffe · Haifa, IL
• Renata Yelizarov · Kiryat Yam, IL
• Ron Frim · Haifa, IL
• Lior Melamed · Beer Sheva, IL

Key dates

• Filing date: Jul 7, 2015
• Grant date: Mar 12, 2019
• Expiry date: Jul 11, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2201/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for preparing bromine-containing polymers, comprising a Friedel-Crafts alkylation reaction of pentabromobenzyl halide with a polymer reactant which contains one or more six-membered aromatic ring(s) in its repeat unit, in the presence of at least one Friedel-Crafts catalyst. The so-formed bromine-containing polymers, having pendent —CH2C6Br5 groups attached to at least a portion of the six-membered aromatic rings of the polymer, with a carbon ring atom of said six-membered aromatic ring being bonded to the aliphatic carbon of said —CH2C6Br5 pendent group, are also provided. These bromine-containing polymers are useful as flame retarding agents.