Highly scratch-resistant multilayer coat, method for producing and use of the same

US6652919B1 · kind B1 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Donald H. Campbell · Wixom, US
• Hubert Baumgart · Hachenburg, DE
• Thomas Farwick · Billerbeck, DE
• Ulrike Rockrath · Senden, DE

Key dates

• Filing date: Aug 2, 2001
• Grant date: Nov 25, 2003
• Expiry date: Aug 2, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A highly scratch-resistant multicoat paint system on a primed or unprimed substrate, comprising above one another in this order(A) a basecoat,(B) a first clearcoat as intermediate coat, and(C) a second clearcoat as the topmost coat, wherein the second clearcoat (C) is producible from a coating coating material(C) comprising(C1) at least one oligomer and/or polymer containing at least one pendant carbamate and/or allophanate group (c11), especially carbamate group (c11), of the formula:—O—(CO)—NH2—O—(CO)—NH—(CO)—NH2 and(C2) at least one crosslinking agent containing at least two functional groups (c21) which undergo crosslinking reactions with the carbamate group and/or allophanate group (c11);and also a process for producing highly scratch-resistant multicoat systems.