Process for the production of toluene-soluble, sulphur-modified chloroprene polymers

US4920189A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Werner Obrecht · Moers, DE
• Peter Wendling · Leverkusen, DE
• Wilhelm Gobel · Leverkusen, DE
• Eberhard Muller · Cologne, DE

Key dates

• Filing date: Aug 25, 1987
• Grant date: Apr 24, 1990
• Expiry date: Aug 25, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F36/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Toluene-soluble, sulphur-modified polychloroprene is obtained by emulsion copolymerization of chloroprene, sulphur and optionally further monomers which are copolymerizable with chloroprene and sulphur using a peroxy activator and subsequent working-up by stabilizing, stopping, degassing and isolating without separate peptization, in that polymerization is carried out in the presence of dithiocarbamates and/or xanthogenates and the activator is metered in continuously or batch-wise during the course of polymerization.