Polyacrylates and their use as levelling agents for powder coatings

US5397844A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Herbert Fischer · Goldkronach, DE
• Wolfgang Gress · Wuppertal, DE
• Doris Oberkobusch · Goldkronach, DE

Key dates

• Filing date: Feb 7, 1994
• Grant date: Mar 14, 1995
• Expiry date: Feb 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyacrylates and their use for powder coatings are disclosed. In order to prepare the polyacrylates, acrylic acid, methacrylic acid, their esters with C.sub.1 -C.sub.4 alcohols, and/or fumaric acid, maleic acid, and their anhydrides are first polymerized. The polymers are then reacted with long chain alcohols, one alcohol having an aliphatic chain with 6 to 36 carbon atoms and a second alcohol having a cyclic amide structure. This polyacrylate is suitable as a levelling agent for powder coatings, in particular for powder lacquers. It improves the flowing behavior by reducing the orange peel effect and improves flowability.