Aqueous polymer/polyurethane resin binder vehicle dispersion and the production thereof, and coating media and the use thereof

US6001924A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Jurgen Dobert · Sprockhövel, DE
• Bettina Vogt-Birnbrich · Solingen, DE
• Armin Gobel · Syke, DE
• Marcus Brunner · Wuppertal, DE

Key dates

• Filing date: Jul 20, 1998
• Grant date: Dec 14, 1999
• Expiry date: Jul 20, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/637
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous binder vehicle dispersion and coating media, which can be used for multi-layer coating, wherein the dispersion is obtainable by the reaction of PA1 I. 20 to 97% by weight of a polyurethane(-urea) resin containing groups which are reactive towards a chain extender IV), having a number average molecular weight (Mn) of 1000 to 10,000, and 8 to 80 milliequivalents per 100 g of ionic groups, groups which can be converted into ionic groups and/or hydrophilic groups, PA1 II. 0 to 30% by weight of a polyester resin having a number average molecular weight (Mn) of 500 to 5000, and having the same groups as in I) which are reactive towards IV), and PA1 III. 3 to 80% by weight of a (meth)acrylic copolymer containing 0 to 40 milliequivalents per 100 g of ionic groups, groups which can be converted into ionic groups with the same charge as in I) and/or hydrophilic groups, having the same groups as in I) and II) which are reactive towards IV), wherein at least 50% by weight of III) has been produced in the presence of at least part of components I) and/or II), with PA1 IV. one or more chain extenders, and conversion into the aqueous phase.