Multilayer coating with a primer-surfacer of a nonaqueous coating material comprising at least two different polyesters

US10421879B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Heinrich Wonnemann · Telgte, DE
• Markus Oberhoff · Speyer, DE
• Martin Rieping · Drensteinfurt, DE
• Beate Podlaski-Pyzik · Munster, DE
• Carole Morcillo Ruiz · Persan, FR
• Michael H. Hartung · Tucson, US

Key dates

• Filing date: Feb 20, 2013
• Grant date: Sep 24, 2019
• Expiry date: Feb 20, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method for producing a multicoat coating comprises: applying a primer-surfacer coat (I) to an optionally pretreated substrate, curing coat (I), applying a basecoat (II) to coat (I), optionally curing the basecoat (II), applying a clearcoat (III) to basecoat (II), and curing basecoat (II) and/or clearcoat (III), wherein coat (I) is obtained by applying a nonaqueous, solventborne coating material comprising by weight: at least 20% of at least one organic solvent, at least 8% of at least one first polyester (A1), having a glass transition temperature of at least 20° C. and an acid number of 0 to 40 mg KOH/g; at least 8% by weight of at least one second polyester (A2), different from (A1) and having a glass transition temperature of not more than 10° C.; at least one crosslinker (B); and at least 8% of one or more fillers and/or pigments (C).