Associative thickener comprising acid monomer, associative monomer and nonionic monomer

US9023116B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Philipp Zacharias · Leeds, GB
• Hermann Seyffer · Heidelberg, DE
• Ilshat Gubaydullin · Ludwigshafen, DE
• Harutyun Hanciogullari · Schifferstadt, DE
• Marc Bothe · Schifferstadt, DE

Key dates

• Filing date: Feb 1, 2011
• Grant date: May 5, 2015
• Expiry date: Mar 24, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31511
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

As associative thickener obtainable by free radical polymerization, the preparation thereof and the use thereof in paper coating slips are described. The associative thickener is formed from (a) acid monomers selected from ethylenically unsaturated C3- to C8-carboxylic acids, (b) associative monomers of the general formula H2C═CR1—COO-(EO)n—(PO)m—R2, in which R1 is hydrogen or methyl, n is a number of at least two, m is a number from zero to 50, EO is an ethylene oxide group, PO is a propylene oxide group and R2 is a C8-C30-alkyl group or a C8-C30-alkaryl group, and (c) nonionic, copolymerizable monomers differing from a) and b), the reaction product having been reacted, after the polymerization, with initiators forming nonionic radicals.