Clearcoat coating composition, method for production and use

US9617448B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Christian Weiher · Munster, DE
• Günter Klein
• Andreas Poppe · Clüversborstel, DE
• Ulrike Clausen-Meiring · Senden, DE
• Helmut Kleine Beckmann · Ostbevern, DE
• Corinna Au;mann · Hamm, DE
• Thomas Leitner · Dortmund, DE

Key dates

• Filing date: Feb 1, 2013
• Grant date: Apr 11, 2017
• Expiry date: Jul 29, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/035
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Described is a clearcoat coating composition, its use, and a process for preparing the clearcoat coating composition. The clearcoat coating composition comprises (A) at least one polyester having an OH number of 80-250 mg KOH/g; (B) at least one butanol-etherified melamine-formaldehyde resin having a crosslinking onset temperature between 65° C.-100° C. lower than the crosslinking onset temperature of hexamethoxy-methylmelamine; (C) at least one butanol-etherified melamine-formaldehyde resin having a crosslinking onset temperature between 30° C.-60° C. lower than the crosslinking onset temperature of hexamethoxymethylmelamine; (D) at least one organic urea compound as rheological assistant; and (E) at least one acid catalyst.