Coating and molding compositions with spreadability improving and lubricity increasing siloxanes and use of such siloxanes as coating and molding composition additives

US4613641A · kind A · utility

Assignee

• BYK-CHEMIE GMBH · DE

Inventors

• Karlheinz Haubennestel · Wesel, DE
• Alfred Bubat · Xanten, DE

Key dates

• Filing date: Jul 24, 1985
• Grant date: Sep 23, 1986
• Expiry date: Jul 24, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/47
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Coating compositions and molding materials containing a polyester group containing siloxane to enhance spreading and increase lubricity, having the formula ##STR1## wherein R.sub.1 represents alkyl groups with 1 to 30 carbon atoms which may be replaced partially by other groups, PA1 A and B each represent --CH.sub.3 or R.sub.2 --Z--, PA1 R.sub.2 represents an aliphatic and/or cycloaliphatic and/or aromatic polyester group free of Zerewittinoff H atoms, having an average molecular weight of 200 to 3000, and containing at least three ##STR2## groups, Z represents a divalent group connecting the silicon atom with the R.sub.2 group, PA1 x is 3 to 250, PA1 y is 0 to 50, and in which the average molecule contains at least one R.sub.2 --Z-- group and the ratio of the number of R.sub.2 --Z-- groups to x is 1:2 to 1:40.