Carboxyl polyol-derived polyester and epoxide resin aqueous coating

US5272187A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Lutz-Werner Gross · Haltern, DE
• Ulrich Poth · Munster, DE
• Dieter Hille · Bensberg, DE
• Klaus Weidemeier · Munster, DE

Key dates

• Filing date: Oct 21, 1992
• Grant date: Dec 21, 1993
• Expiry date: Oct 21, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31529
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A water-dilutable coating comprising a binder obtained from an epoxide resin-modified polyester possessing free carboxyl groups prepared from the reaction of: PA1 A) a polyester polymerized from: PA2 a.sub.1) a polycarboxylic acid containing at least three carboxyl groups and/or PA2 a.sub.2) a polyol containing at least one carboxyl group and PA2 a.sub.3) a polycarboxylic acid containing two carboxyl groups and PA2 a.sub.4) a polyol, wherein the polyester contains (cyclo)aliphatic elements having at least six carbon atoms; PA1 B) from 0.3-1.5 equivalents per polyester molecule of a bisphenol epoxide resin or a reaction product thereof containing at least one epoxide group per molecule with a carboxylic acid; and PA1 C) a crosslinking agent.