Coating powder slurry with microencapsulated particles, and production and use of the same

US6624239B1 · kind B1 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Maximilian Bendix · Hachenburg, DE
• Ulrich Poth · Munster, DE

Key dates

• Filing date: May 7, 2001
• Grant date: Sep 23, 2003
• Expiry date: May 7, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A powder coating slurry, especially a powder clearcoat slurry, comprising at least one hydroxyl-containing binder A, at least one polyisocyanate crosslinking agent B, and water, where1) the hydroxyl-containing binders A and the polyisocyanates B have been homogenized such that not less than 30, preferably not less than 60 and in particular not less than 90% by weight of the polyisocyanate B are present in solution or dispersion in the particles comprising the binders A, and2) the particles of the crosslinking agent B which may still be present in the aqueous phase, and the particles comprising the binders A and the crosslinking agents B, have been stabilized, by way of the isocyanate groups present on their surface, by means of a deactivator added to the aqueous phase.