Polymerizing phenothiazine stabilizer chloroprene in the presence of an initiator comprising sodium dithionate

US4525561A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rudolf Casper · Leverkusen, DE
• Peter Wendling · Leverkusen, DE
• Wolfgang Konter · Neuss, DE
• Gottfried Pampus
• Gerhard Hohmann · Leverkusen, DE

Key dates

• Filing date: Dec 16, 1983
• Grant date: Jun 25, 1985
• Expiry date: Dec 16, 2003

Classification

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

Abstract

An improved process of polymerizing an aqueous emulsion of chloroprene monomer stabilized with phenothiazine wherein polymerization is initiated in the presence of phenothiazine stabilizer and molecular oxygen with a polymerization initiator comprising sodium dithionite.