Solvent-free pigmented formulation

US6794436B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Bernhard Schlarb · Ludwigshafen, DE
• Rolf Dersch · Bischofswerda, DE
• David Christie · Mannheim, DE
• Franz Weingart · Leimen, DE

Key dates

• Filing date: May 6, 2002
• Grant date: Sep 21, 2004
• Expiry date: May 15, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L33/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a solvent-free pigmented formulation comprisingI) a binder based on at least one copolymer P in an aqueous polymer dispersion obtainable by free-radical aqueous emulsion polymerization of a monomer mixture containinga) from 45 to 69.95% by weight of at least one monomer a) whose homopolymer has a glass transition temperature Tg of less than 20° C.,b) from 30 to 54.95% by weight of at least one monomer b) whose homopolymer has a glass transition temperature Tg of more than 50° C.,c) from 0.05 to 1.5% by weight of itaconic acid and/or its anhydride and/or its salts, as acidic monomer c), andd) from 0 to 2% by weight of at least one further monomer d),the sum of the % by weight of a) to d) being 100% by weight,II) at least one pigment,III) at least one pigment dispersant having an acid number to DIN 53402 of less than 600,IV) if desired, an inorganic filler, andV) customary auxiliaries.