Polymer dispersions as an additive in building materials

US6809148B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Markus Koppers · Frankenthal (Pfalz), DE
• Joachim Pakusch · Ludwigshafen, DE
• Hermann Anders · Neustadt, DE
• Marco Schmidt · Stuttgart, DE
• Hans-Jurgen Denu · Friedelsheim, DE

Key dates

• Filing date: Mar 10, 2003
• Grant date: Oct 26, 2004
• Expiry date: Mar 10, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/0075
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Polymer dispersions comprise at least one copolymer which contains, as polymerized monomers,a) from 25 to 70% by weight of at least one conjugated aliphatic diene,b) from 25 to 70% by weight of at least one vinylaromatic monomer,c) from 2.5 to 15% by weight of at least one monoester of a C2-C10-alkanediol with acrylic acid or methacrylic acid orc′) from 0.1 to 10% by weight of at least one alkylpolyethylene glycol (meth)acrylate of the formula (I) where R1 is hydrogen or methyl, R2 is C1-C4-alkyl and n is an integer from 1 to 100, orc″) from 2 to 15% by weight of a mixture of the monoester c) and the alkylpolyethylene glycol (meth)acrylate c′),d) from 0 to 1.0% by weight of ethylenically unsaturated monomers which have at least one acid group, or salts thereof,e) from 0 to 5.0% by weight of ethylenically unsaturated nitriles andf) from 0 to 1.0% by weight of amides of &agr;,&bgr;-ethylenically unsaturated mono- and dicarboxylic acids.The polymer dispersions described are suitable, inter alia, as additives in building materials based on hydraulic binders.