Curable powder mixtures

US4997907A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Manfred Marten · Mainz, DE
• Claus Godau · Kiedrich, DE
• Gerd Walz · Wiesbaden, DE

Key dates

• Filing date: Mar 9, 1990
• Grant date: Mar 5, 1991
• Expiry date: Mar 9, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D163/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to curable powder mixtures comprising PA0 (A) carboxyl-containing polyesters, PA0 (B) compounds containing at least two 1,2-epoxide groups, which compounds are reaction products of PA1 (B1) compounds containing at least two 1,2-epoxide groups per molecule and having an epoxide equivalent weight of 160 to 600 and PA1 (B2) aromatic dicarboxylic acids or mixtures thereof with compounds selected from the group (cyclo)aliphatic dicarboxylic acids, monocarboxylic acids and/or monohydric phenols, and PA1 (B3) cyclic anhydrides, if required, and PA0 (C) any customary additives, if appropriate. These mixtures are distinguished in particular by an improved resistance to yellowing and/or increased reactivity.