Polymerization of chloroprene with xanthates and dithiocarbamates

US4814401A · 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: Feb 29, 1988
• Grant date: Mar 21, 1989
• Expiry date: Feb 29, 2008

Classification

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

Abstract

An improved process for the preparation of polychloroprene by the emulsion (co)polymerization of chloroprene and optionally other monomers capable of copolymerization with chloroprene, using a peroxo activator, and subsequent working up of the product by stopping the reaction, stabilizing, degassing and isolating the product, characterized in that polymerization is carried out in the presence of dithiocarbamates and/or xanthates and 0 to 0.5% by weight of sodium .beta.-anthraquinone sulphonate.