Clear paint compositions comprising hyperbranched, dendritic, hydroxyl-functional polyesters

US9334355B2 · kind B2 · utility

Assignees

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

Inventors

• Hitoshi Taniguchi · Yokohama, JP
• Eishi Tsukamoto · Yokohama, JP
• Hiroyuki Takagi · Yokohama, JP
• Andreas Poppe · Clüversborstel, DE
• Günter Klein
• Veronika Lackstadter · Hamm, DE
• Bianca Giesen · Hamm, DE
• Petra Wagner · Trostberg, DE
• Björn Feldmann · Hachenburg, DE
• Sabine Holtschulte · Ascheberg, DE
• Julia Melzer · Hachenburg, DE
• Tanja Bricke · Kohlenbissen, DE
• Oliver Hilge · Drensteinfurt, DE
• Benedikt Schnier · Warendorf, DE
• Silke Hottenbacher · Hachenburg, DE
• Ulrike Clausen-Meiring · Senden, DE

Key dates

• Filing date: Jun 5, 2008
• Grant date: May 10, 2016
• Expiry date: Jul 14, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L61/28
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is a hyperbranched, dendritic, hydroxyl-functional polyester comprising an OH number greater than or equal to 180 mg KOH/g as measured via DIN 53240 and to clearcoat compositions comprising said polyesters. Also disclosed are processes for preparing the disclosed polyester, methods of making coated automotive substrates by applying the disclosed clearcoat compositions to automotive substrates, and to coated substrates made therefrom.