Aqueous coating media and their use in single-layer and multi-layer coating processes

US5886085A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Heike Heuwinkel · Sprockhövel, DE
• Werner Lenhard · Wuppertal, DE
• Hans-Peter Patzschke · Wuppertal, DE
• Bettina Vogt-Birnbrich · Solingen, DE

Key dates

• Filing date: Jun 10, 1997
• Grant date: Mar 23, 1999
• Expiry date: Jun 10, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D201/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Coating media and their use in processes for producing single-layer and multi-layer coatings are described. The coating media contain an aqueous mixture comprising PA1 I. 99-70% by weight of a mixture of PA2 A) 50-100% by weight of one or more binder vehicles which at least in part contain ionic groups, PA2 B) 0-50% by weight of one or more crosslinking agents, which at least in part may contain ionic groups, for binder vehicle A), wherein the ionic groups which are present have the same charge as those of component A), and PA1 II. 1-30% by weight of one or more binder vehicles (component C), which are miscible both with the binder vehicles of component A) at the storage temperature and with each other at the curing temperature of the coating media and which contain ionic groups, the charge of which is opposite to the charge of the ionic groups of component I), wherein the percentages by weight are given with respect to the weight of resin solids in each case and wherein the proportions of components I) and II) are matched to each other so that 0.5 to 70% of the number of charges of the ionic groups of I) are neutralised by the charges of the ionic groups of II), and PA1 III. custo…