Process for the production of vulcanizable mercaptan-and/or xanthogen disulfide-regulated polychloroprene rubbers with minimal mold fouling

US5298580A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Wendling · Leverkusen, DE
• Werner Obrecht · Moers, DE
• Michael Happ · Scottsdale, US
• Rudiger Musch · Bensberg, DE
• Eberhard Muller · Cologne, DE

Key dates

• Filing date: Sep 18, 1992
• Grant date: Mar 29, 1994
• Expiry date: Sep 18, 2012

Classification

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

Abstract

Vulcanizable, mercaptan- and/or xanthogen-disulfide-regulated polychloroprene rubber are produced by emulsion polymerization of chloroprene and, based on polymerizable monomer used, 0 to 30 parts by weight ethylenically unsaturated, other monomers copolymerizable with chloroprene in an alkaline medium by a process in which PA1 (1) 0.1 to 10 parts by weight of a tricyclic diterpene carboxylic acid containing at least two conjugated C.dbd.C double bonds per molecule, based on the polymerizable monomer used, and optionally PA1 (2) 0.1 to 5 parts by weight, based on polymerizable monomer used, fatty acid esters are used for their production. The polychloroprene produced in accordance with the invention may be used for the production of vulcanized rubber articles. The polychloroprene rubbers produced by the process according to the invention have a minimal tendency to foul metal molds. The pollution of wastewaters by the process according to the invention is minimal. The well-known favorable properties of polychloroprene remain unaffected.