Aqueous dispersions containing multistage produced polymers and coating agent compositions containing the same

US10577505B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Cathrin Corten · Unna, DE
• Dirk Eierhoff · Munster, DE
• Britta Schnieders · Meppen, DE
• Nicole Freitag · Hachenburg, DE
• Heinz-Ulrich Grumpe · Sende, DE
• Elisabeth Wessling · Emsdetten, DE
• Joerg Schwarz · Munster, DE
• Mechthild Vienenkoetter · Ascheberg, DE
• Patrick Wilm · Ahlen, DE

Key dates

• Filing date: Jan 8, 2016
• Grant date: Mar 3, 2020
• Expiry date: Jun 20, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2203/16
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to aqueous dispersions comprising multistage-prepared polymers, and also to coating material compositions comprising them, preparable by multistage polymerization of olefinically unsaturated monomers, using an emulsifier and a water-soluble initiator, under conditions of starved feed polymerization, and using particular monomer mixtures in the individual stages.The invention also relates to a pigmented aqueous basecoat material comprising the aqueous dispersion of the invention, to the use of the aqueous dispersion of the invention in aqueous basecoat materials for improving adhesion, to a process for producing a multicoat paint system on a substrate, and to a multicoat paint system produced in accordance with the stated process.