Method for producing acrylic acid polymers

US10875944B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Johannes Barth · Shanghai, CN
• Gledison Fonseca · Ludwigshafen, DE
• Dieter Faul · Niederkirchen, DE
• Martin Ernst · Ludwigshafen am Rhein, DE
• Juergen Detering · Schifferstadt, DE
• Ferdinand Leifeld · Kempen, DE
• Gazi Tuerkoglu · Ludwigshafen, DE

Key dates

• Filing date: Feb 2, 2017
• Grant date: Dec 29, 2020
• Expiry date: Dec 4, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3757
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing aqueous solutions of acrylic acid polymers by polymerization of acrylic acid in feed operation with a free-radical starter in the presence of hypophosphite in water as solvent, which comprises