Process for the production of polyacrylic acids

US5297740A · kind A · utility

Inventors

• Alfons Landscheidt · Krefeld, DE
• Andreas Gebauer · Schweinfurt, DE

Key dates

• Filing date: Jun 17, 1993
• Grant date: Mar 29, 1994
• Expiry date: Jun 17, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing polyacrylic acids and copolymers of acrylic acid with up to 50 mol-% of comonomers. These compounds have a molecular weight of less than 100,000, measured at a pH-value of 8, and 10 to 60 mol-% are neutralized with calcium hydroxide. The invention also relates to the use of these products as grinding and dispersing aids for calcium carbonate.