Paint compositions, a method of finish-painting and painted objects

US8236895B2 · kind B2 · utility

Assignees

• BASF Coatings Japan Ltd. · JP
• BASF COATINGS GMBH · DE

Inventors

• Hitoshi Taniguchi · Yokohama, JP
• Hiroyuki Takagi · Yokohama, JP
• Eishi Tsukamoto · Yokohama, JP
• Andreas Poppe · Clüversborstel, DE
• Björn Feldmann · Hachenburg, DE
• Julia Melzer · Hachenburg, DE
• Sabine Holtschulte · Ascheberg, DE
• Karl-Heinz Joost · Drensteinfurt, DE

Key dates

• Filing date: Aug 22, 2008
• Grant date: Aug 7, 2012
• Expiry date: Aug 22, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L101/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is a finish paint composition having a hydroxyl group containing resin (A) comprising a hydroxyl group value of 80 to 220 mgKOH/g, a glass transition temperature of −50° or above but below 0° C., and 25 to 55 mass% of units of 4-hydroxybutyl (meth)acrylate origin, a hydroxyl group containing resin (B) with a hydroxyl group value of 80 to 220 mgKOH/g, and a glass transition temperature of 0 to 50° C., and a crosslinking agent (C) comprising polyisocyanate compound having isocyanate groups, wherein the proportions of hydroxyl group containing resin (A) and hydroxyl group containing resin (B) are, as a ratio of solid fraction masses, from 95/5 to 50/50, and the proportion of isocyanate groups of the crosslinking agent (C) with respect to the hydroxyl groups in total of the hydroxyl group containing resin (A) and the hydroxyl group containing resin (B), as the NCO/OH mol ratio, is 0.5 to 1.5.