Process for isolating pulverulent chlorinated aliphatic polymers from their aliphatic chlorohydrocarbon solutions

US4588809A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karl-Heinrich Meyer · Krefeld, DE
• Diez Heine · Leverkusen, DE
• Franz Alfes · Krefeld, DE
• Wolfgang Eisermann · Goldkronach, DE

Key dates

• Filing date: Nov 19, 1984
• Grant date: May 13, 1986
• Expiry date: Nov 19, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to an improved process for isolating pulverulent chlorinated aliphatic polymers from their aliphatic chlorohydrocarbon solutions by introducing a mixture of steam and special solvent into said solutions, removing the aliphatic chlorohydrocarbon by steam distillation, and isolating the chlorinated polymer in the customary manner as a solid. The process produces a product which is practically free (.ltoreq.20 ppm) of toxic aliphatic chlorohydrocarbons and can be safely used in paints, adhesives or printing inks.