Stabilized chlorine-containing polymers

US5283273A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Hans Sander · Ludwigshafen, DE
• Olaf Hartmann · Jena, DE
• Hermann O. Wirth · Bensheim, DE

Key dates

• Filing date: Feb 16, 1993
• Grant date: Feb 1, 1994
• Expiry date: Feb 16, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3435
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Chlorine-containing polymers can be stabilized against thermal and actinic degradation by addition of a) a sterically hindered amine, b) a zinc compound, c) a calcium, magnesium and/or barium compound, and d) a 1,3-dicarbonyl compound. Other additives such as phosphites or epoxides can further improve the stabilization.