Manufacture of heat-stable brominated oligomers of monovinyl-aromatic compounds

US4074032A · kind A · utility

Assignee

• BASF SE

Inventors

• Herbert Naarmann · Wattenheim, DE
• Klaus Penzien · Bischofswerda, DE
• Hermann Gausepohl · Mutterstadt, DE

Key dates

• Filing date: Jul 14, 1976
• Grant date: Feb 14, 1978
• Expiry date: Jul 14, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/22
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the manufacture of heat-stable, brominated oligostyrenes by brominating selectively hydrogenated oligostyrenes in halogenated solvents in the presence of Lewis acids at from -25.degree. to +20.degree. C. The brominated oligomers are highly heat-stable and can be processed, by themselves or as components of mixtures with other thermoplastics, to give various shaped articles.