Aqueous binder compositions

US9382442B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Jens Hartig · Ludwigshafen, DE
• Manfred Dargatz · Worms, DE
• Karl Haeberle · Speyer, DE
• Sebastian Enck · Jakarta, ID

Key dates

• Filing date: May 23, 2013
• Grant date: Jul 5, 2016
• Expiry date: May 23, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D151/003
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to aqueous binder compositions which are based on aqueous multistage polymer dispersions, to the uses of such binder compositions, and to coating compositions comprising them. The aqueous binder composition comprises: a) a polymer P in the form of an aqueous multistage polymer dispersion of dispersed polymer particles, where the polymer particles comprise a first polymer having a glass transition temperature of at least 30° C. and being made of ethylenically unsaturated monomers M-A, and a second polymer having a glass transition temperature of not more than 20° C. and being made of ethylenically unsaturated monomers M-B, where the ethylenically unsaturated monomers M-A and M-B together comprise: i. 85% to 99.45% by weight, preferably 87.5% to 97% by weight and in particular 90% to 95.5% by weight, based in each case on the total amount of monomers M-A+M-B, of at least one neutral, monoethylenically unsaturated monomer M1 having a solubility in water of at most 50 g/l at 25° C. and 1 bar; ii. 0.5% to 10% by weight, preferably 1% to 7.5% by weight and in particular 1.5% to 6.5% by weight, based in each case on the total amount of monomers M-A+M-B, of at…