Coating substance consisting of at least three components, method for producing said coating substance and use thereof

US6946515B1 · kind B1 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Bernhard Lettmann · Drensteinfurt, DE
• Egbert Nienhaus · Ascheberg, DE

Key dates

• Filing date: Mar 27, 2000
• Grant date: Sep 20, 2005
• Expiry date: Mar 27, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/792
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A coating material consisting of at least three components, comprising a component (I) comprising at least one oligomeric or polymeric resin containing functional groups which react with isocyanate groups, as binder (A), a component (II) comprising at least one polyisocyanate as crosslinking agent (B), and a component (III) which comprises water, wherein component (I) and/or (III) comprise or comprises at least one low molecular weight and/or oligomeric, substantially unbranched, hydrophobic polyester (C) containing at least two hydroxyl groups in the molecule and having an OH number of from 56 to 500 mg KOH/g, an acid number <10 mg KOH/g and a number-average molecular weight Mn of from 450 to 2 000 daltons.