Method for producing a coating agent

US9909021B2 · kind B2 · utility

Assignee

• Thor GmbH · DE

Inventors

• Rüdiger Baum · Neulußheim, DE
• Peter Erich Hahn · Lampertheim, DE
• Thomas Wunder · Neustadt, DE

Key dates

• Filing date: Dec 3, 2014
• Grant date: Mar 6, 2018
• Expiry date: Dec 3, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for producing a coating agent, such as a paint or a plaster, having a 5-chloro-2-methyl-4-isothiazolone content in the range from 0 to 1 ppm, using components which would introduce in total more than 1.5 ppm of 5-chloro-2-methyl-4-isothiazolone into the coating agent. The method comprises the steps: a) decomposing the 5-chloro-2-methyl-4-isothiazolone present in the components of the coating agent with the help of at least one 5-chloro-2-methyl-4-isothiazolone-decomposing compound, such that the content of 5-chloro-2-methyl-4-isothiazolone is in a range from 0 to 1 ppm over the course of a period of less than 24 hours, b) mixing the individual constituents of the coating agent, not definitively selected from the group comprising water, binder, pigment, wetting agent, thickener, thixotropic agent, pH regulating compounds, fillers and dispersants, and c) adding at least one preservative selected from the group consisting of 2-methylisothiazolin-3-one, 1,2-benzisothiazolin-3-one, N-methyl-1,2-benzisothiazolin-3-one and 2-n-octylisothiazolin-3-one.