Polymer bromination process in solution

US6420489B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Feb 28, 2001
• Grant date: Jul 16, 2002
• Expiry date: Feb 28, 2021

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 selected halogen-containing hydrocarbons as solvent. There is also provided an improved product of said process wherein the brominated polymer contains not less than 80 percent of the bound bromine atoms in a form suitable to participate in the vulcanization of the polymer and wherein not less than 70 percent of the bound conjugated diolefin units are similarly so brominated.