Aqueous solution containing copolymers with polyether side chains

US8349983B2 · kind B2 · utility

Assignee

• CONSTRUCTION RESEARCH & TECHNOLOGY GMBH · DE

Inventors

• Klaus Lorenz · Zangberg, DE
• Gerhard Albrecht · Prien am Chiemsee, DE
• Silke Flakus · Ebersberg, DE
• Alexander Kraus · Evenhausen, DE
• Helmut Mack · Ludwigshafen, DE
• Petra Wagner · Trostberg, DE
• Barbara Wimmer · Tacherting, DE
• Christian Scholz · Neustadt an der Weinstraße, DE
• Angelika Hartl · Emertsham, DE
• Martin Winklbauer · Burgkirchen an der Alz, DE

Key dates

• Filing date: Jan 12, 2009
• Grant date: Jan 8, 2013
• Expiry date: Jan 12, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/30
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of an aqueous solution comprising 30 to 95% by weight of water and 5 to 70% by weight of a copolymer dissolved in the water by free radical solution polymerizations of an isoprenol polyether derivative with an acrylic acid derivative, so that the copolymer has 20 to 45 mol % of an isoprenol polyether derivative structural unit and 55 to 80 mol % of an acrylic acid derivative structural unit. The aqueous solution is suitable as a superplasticizer for hydraulic binders.