Alpha,Omega-hydroxy-functionalized oligoester as adhesion promoter in solventborne fillers

US9777169B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Audree Andersen · Havixbeck, DE
• Cathrin Corten · Unna, DE
• Markus Saedler · Hachenburg, DE
• Fatmir Raka · Hachenburg, DE
• Frederik Fölling · Hachenburg, DE
• Nicole Freitag · Hachenburg, DE
• Stefanie BOSHE-PLOIS · Ochtrup, DE
• Alexandra Steffens · Munster, DE

Key dates

• Filing date: Feb 7, 2014
• Grant date: Oct 3, 2017
• Expiry date: May 20, 2034

Classification

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

Abstract

Solventborne filler comprises at least one alpha,omega-hydroxy-functionalized oligoester which possesses an OH number of 30 to 160 mg KOH/g, a theoretical carbon-carbon double bond content of 1 to 3 mmol/g, a number-average molecular weight of 1000 to 3000 g/mol and a weight-average molecular weight of 2800 to 10 000 g/mol, moreover, the sum of the weight percentage fractions of all the alpha,omega-hydroxy-functionalized oligoesters being 0.5 to 10 wt. %, based on the total amount of the solventborne filler. Also provided are a multicoat paint system, a process for producing a multicoat paint system, and use of the above-designated alpha,omega-hydroxy-functionalized oligoester in solventborne fillers for improving adhesion.