Coating compositions and polymeric moulding compounds having anti-adhesion and dirt repellency properties

US7122599B2 · kind B2 · utility

Assignee

• BYK-CHEMIE GMBH · DE

Inventors

• Karlheinz Haubennestel · Wesel, DE
• Alfred Bubat · Xanten, DE
• Albert Frank · Xanten, DE
• Axel Woocker · Rees, DE
• Udo Krappe · Nideggen, DE

Key dates

• Filing date: Sep 28, 2001
• Grant date: Oct 17, 2006
• Expiry date: Sep 28, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/458
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to coating compositions having anti-adhesion and dirt repellency properties, these compositions being admixed as additive with from 0.1 to 10% by weight, based on the solids content of the coating composition, of a branched polymer which possesses a weight-average molecular weight of from 2000 to 200,000 and comprises a polymeric base molecule and also polydiorganosiloxane side chains which are bonded covalently to the base molecule via Si—C bonds, have a weight-average molecular weight of between 1000 and 30,000, and whose fraction of the total weight of the branched polymer is from 5 to 25% by weight. The present invention further relates to polymeric moulding compounds having anti-adhesion and dirt repellency properties, to which this branched polymer is added as additive in an amount of from 0.1 to 10% by weight, based on the total weight of the polymeric moulding compounds. The invention additionally relates to the use of the branched polymers as additives for coating compositions and polymeric moulding compounds.