Aqueous dispersions of acrylate modified alkyd resins and use thereof

US6627700B1 · kind B1 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Vijay Kadambande · Münster, DE
• Heinz-Peter Rink · Hachenburg, DE

Key dates

• Filing date: Aug 21, 2002
• Grant date: Sep 30, 2003
• Expiry date: Aug 21, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J167/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aqueous dispersion of an acrylate-modified alkyd resin, preparable in the presence of at least one water-miscible diol by (1) dispersing in water at least one alkyd resin containing pendant and/or terminal allyloxy groups, (2) graft copolymerizing a mixture of methacrylic acid and at least one further, carboxyl-free olefinically unsaturated monomer in dispersion 1, and (3) once or n times graft copolymerising (3.1) at least one olefinically unsaturated monomer which is free from acid groups and/or (3.2) at least one mixture of at least one olefinically unsaturated monomer which contains acid groups and at least one olefinically unsaturated monomer which is free from acid groups, in dispersion 2 or 2 to n−1, with the proviso that in step (3) or (n) of the process, acid groups are incorporated in a total amount to not more than 90 mol % of the amount of acid groups incorporated in step (2) of the process.