Concrete flow improvers and water reducers

US11447579B2 · kind B2 · utility

Assignee

• Roehm GmbH · DE

Inventors

• Steffen Krill · Mühltal, DE
• Johannes Vorholz · Alzenau, DE
• Andreas Weber · Rabenau, DE
• Marita Kaufmann · Weiterstadt, DE
• Andrea Wittkowski · Groß-Umstadt, DE

Key dates

• Filing date: Aug 1, 2018
• Grant date: Sep 20, 2022
• Expiry date: Apr 14, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2438/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing a poly(meth)acrylic acid, characterized in that a (meth)acrylic acid-containing process stream from (meth)acrolein synthesis is subjected to free-radical polymerization. The invention also relates to the esterification of the polymer obtained to give a homopolymer or copolymer ester, and to the use thereof as additive, flow improver and water reducer.