Polymers containing carboxyl groups and polyalkylene ether side- chains as additives in mineral building materials

US6384111B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Axel Kistenmacher · Ludwigshafen, DE
• Paul Klingelhofer · Mannheim, DE
• Johannes Perner · Neustadt, DE
• Markus Hartmann · Neustadt, DE
• Alfred Ruland · Schriesheim, DE

Key dates

• Filing date: Jun 21, 1999
• Grant date: May 7, 2002
• Expiry date: Jun 21, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/286
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Additives for mineral building materials made of water-soluble or water-dispersible polymers containing a carboxyl group, optionally in latent form, and at least one side chain of formula I:—X—Y—[O—(Alk—O)n—R]k  (I)whereink is 1, 2, 3 or 4;Y is a C1-C4-alkylene unit, or a single bond if X is a carbonyl group, or when k≠1, can also be  X is  wherein R′ is hydrogen, C1-C20-alkyl, C5-C10-cycloalkyl, C6-C20-aryl, C1-C20-alkanoyl, C7-C21-aroyl, (Alk-O)n—R or -Alk′-O(Alk-O)n—R;Alk is C2-C4-alkylene;Alk′ is C1-C4-alkylene optionally having an OH group;n is a number in the range from 15 to 300; andR is hydrogen, C1-C20-alkyl, C5-C8-cycloalkyl, C6-C20-aryl, C1-C20-alkanoyl or C7-C21-aroyl; are obtained by polymerization of ethylenically unsaturated monomers in the presence of phosphorus-containing compounds and, if appropriate, subsequent polymer-analogous conversion.