Process for the production of water-dilutable binders and their use in coating compositions

US5516853A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Volker Schneider · Sinsheim, DE
• Eberhard Arning · Kaarst, DE
• Harald Blum · Wachtendonk, DE
• Christian Wamprecht · Neuss, DE

Key dates

• Filing date: Apr 19, 1995
• Grant date: May 14, 1996
• Expiry date: Apr 19, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2800/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of oxidatively crosslinkable, water-dilutable binders by PA1 a) forming a copolymer having intramolecular carboxylic anhydride groups by copolymerizing anhydride-functional compounds, other olefinically unsaturated monomers and 5 to 50% by weight, based on the weight of the olefinically unsaturated monomers used for the production of the copolymers a), of monomers which cannot be homopolymerized under the reaction conditions, PA1 b) subsequently reacting by ring-opening esterification at least 50% of the anhydride groups present in the copolymer with one or more unsaturated monohydric alcohols, PA1 c) reacting by ring-opening esterification up to 50% of the anhydride groups with monohydric saturated alcohols having a molecular weight of 32 to 200 either before, during or after step b), PA1 d) optionally reacting 1 to 70% of the carboxyl groups formed in steps b) and c) with organic epoxide compounds and PA1 e) neutralizing at least a portion of the carboxyl groups formed in steps b) and c). The present invention also relates to the binders obtained by this process and to their use in water-dilutable lacquers and coating …