Polymer dispersions of vinylaromatic compounds and acrylate monomers prepared in the presence of seed latex and carbohydrate compounds

US8637160B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Juergen Schmidt-Thuemmes · Schifferstadt, DE
• Elitsa Evstatieva · Mannheim, DE
• Aurelie Morel · Paris, FR
• Dirk Lawrenz · Ludwigshafen am Rhein, DE
• Hermann Seyffer · Heidelberg, DE

Key dates

• Filing date: Jun 10, 2011
• Grant date: Jan 28, 2014
• Expiry date: Mar 8, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31993
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Described are aqueous polymer dispersions and methods of making them. The polymer dispersions are obtainable by free-radically initiated emulsion polymerization of 19.9 to 80 parts by weight of vinylaromatic compounds, 19.9 to 80 parts by weight of acrylate monomers selected from C1-C10 alkyl acrylates and C1-C10 alkyl methacrylates, 0.1 to 10 parts by weight of ethylenically unsaturated acids, and 0 to 20 parts by weight of other ethylenically unsaturated monomers, wherein the emulsion polymerization is effected in an aqueous medium in the presence of free-radical initiators, seed latex and also at least one carbohydrate compound in the form of a degraded starch. The polymer dispersions are particularly useful in the manufacture of paper coating slips.