Use of aqueous polymer dispersions for improving resistance to chemical influences

US9169380B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sebastian Roller · Mannheim, DE
• Rolf Dersch · Bischofswerda, DE
• Uwe Dittrich · Schifferstadt, DE
• Roelof Balk · Böhl-Iggelheim, DE
• Bas Lohmeijer · Mannheim, DE
• Ulrich Tromsdorf · Plankstadt, DE

Key dates

• Filing date: Dec 11, 2012
• Grant date: Oct 27, 2015
• Expiry date: Dec 11, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D133/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Coating compositions containing an aqueous polymer dispersion having improved resistance toward chemicals. The aqueous polymer dispersion is prepared by polymerizing a first composition containing at least one ethylenically unsaturated group (monomers) by radical aqueous emulsion polymerization and then, in the presence of a product mixture from the previous polymerization, polymerizing a second composition containing at least one ethylenically unsaturated group (monomers) by radical aqueous emulsion polymerization. The coating compositions are such that the difference between a glass transition temperature of a polymer prepared from the first polymerization and a glass transition temperature of a polymer prepared from the second polymerization is at least 50° C.