Process for the production of a cationic polychloroprene latex and a mixture of this latex with bitumen emulsion

US4340518A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wilfried Nolte · Leverkusen, DE
• Heinz Esser · Burscheid, DE

Key dates

• Filing date: Jun 18, 1981
• Grant date: Jul 20, 1982
• Expiry date: Jun 18, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L95/005
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for producing a cationic polychloroprene latex by homo- or copolymerizing chloroprene in an aqueous emulsion in the presence of ammonium salts of inorganic or organic acids as emulsifiers wherein the polymerization is carried out in presence of an alkaline earth and/or alkali salt of an organic carboxylic acid or in presence of a mixture of Na.sub.2 HPO.sub.4 and KH.sub.2 PO.sub.4. The latex thus obtained may be mixed with a bitumen emulsion and can be used for the protection of building or in road construction.