Coating compositions having high weathering resistance, process for preparation thereof and use thereof

US9175185B2 · kind B2 · utility

Assignee

• Celanese Emulsions GmbH · DE

Inventors

• Thomas Fichtner · Oppenheim, DE
• Harald Petri · Katzenelnbogen, DE
• Stephan Krieger · Hofheim, DE
• Ivan Cabrera · Dreieich, DE

Key dates

• Filing date: Jul 15, 2008
• Grant date: Nov 3, 2015
• Expiry date: Feb 24, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/013
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

What are described are coating compositions comprising pigments and/or fillers and multistage polyvinyl ester dispersions as binders. These binders are produced by a selected multistage process in which a polyvinyl ester dispersion is obtained in a first stage, monomers in dissolved or pure form or in the form of an emulsion are added to the reaction mixture in a second stage and then the polymerization is started again. The polyvinyl ester dispersions comprise polymerized silanes and/or epoxides or the polyvinyl ester dispersions have only a small content of protective colloids, if any. The coating compositions formulated with the multistage polyvinyl ester dispersions obtained in this way are notable for a very high weathering resistance.