Dispersion resins containing itaconic acid for improving wet abrasion resistance

US6790272B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Cheng-Le Zhao · Charlotte, US
• Joachim Roser · Dessel, BE
• Rolf Dersch · Bischofswerda, DE
• Roland Baumstark · Neustadt, DE

Key dates

• Filing date: Sep 15, 2000
• Grant date: Sep 14, 2004
• Expiry date: Sep 15, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D133/064
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to aqueous pigment preparations containing i) at least one copolymer P of ethylenically unsaturated monomers M in the form of an aqueous polymer dispersion which contains between 0.1 and 1.5 weight %, in relation to the total weight of the copolymer P, of polymerized itaconic acid as acid monomer M1, its salts and/or anhydride, where up to 50 weight % of the itaconic acid can be substituted by another monomer having at least one acid group or a neutralized acid group, and whose glass transition temperature TG lies between −10 and +50° C.; ii) at least one inorganic pigment; iii) possibly inorganic fillers; and iv) standard additives. The invention also relates to the use of the copolymers P containing itaconic acid for improving the wet-abrasion resistance of polymer-bound coatings containing pigments.