Production of copper(II) hydroxide phosphate with a light natural color and an average grain size less than 10 microns

US4567220A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Ralf Schuler · Recklinghausen, DE
• Gunther Maahs · Marl, DE

Key dates

• Filing date: Oct 25, 1984
• Grant date: Jan 28, 1986
• Expiry date: Oct 25, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/32
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing a copper(II) hydroxide phosphate having the Cu.sub.3 (PO.sub.4).sub.2.Cu(OH).sub.2 composition and having a light natural color and an average grain size less than 10 microns. Basic copper carbonate of a bulk density less than 800 grams per liter is treated in an aqueous dispersion with phosphoric acid at temperatures less than 70.degree. C. and the reaction mixture is then mechanically agitated further within the same temperature range. The copper phosphate so obtained is applicable as a smoke-reducing additive in polyvinyl or molding materials containing the same.