Polymer bromination process

US5883198A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gabor Kaszas · London, CA
• Wolfgang Baade · Wildeshausen, DE
• Heinrich Konigshofen · Bensberg, DE

Key dates

• Filing date: Feb 24, 1997
• Grant date: Mar 16, 1999
• Expiry date: Feb 24, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/22
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An improved process is provided for the bromination of isoolefin conjugated diolefin polymers by brominating said polymer in solution in a solvent comprising a mixture of an inert saturated paraffinic hydrocarbon and an inert halogen-containing hydrocarbon. There is also provided an improved product of said process wherein the brominated polymer contains not less than 70 percent of the bound conjugated diolefin units which are brominated and also not less than 80 percent of the bound bromine atoms are in a form suitable to participate in the vulcanization of said polymer.