Coating installation of an industrial mass production coating line including non-aqueous solvent composition as barrier liquid

US11639447B2 · kind B2 · utility

Assignee

• AXALTA COATING SYSTEMS IP CO., LLC · US

Inventors

• Petra Stoffel · Cologne, DE
• Marcus Brunner · Wuppertal, DE

Key dates

• Filing date: Sep 3, 2019
• Grant date: May 2, 2023
• Expiry date: Oct 2, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D9/005
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Coating installations are provided that include storage tanks for an aqueous base component and a non-aqueous hardener component, circulation lines for the components from the respective storage tanks, a mixer and an entrance to the mixer with a connection between each circulating line and the entrance to the mixer, and a release valve for the non-aqueous hardener component. The coating installation downstream of the non-aqueous hardener release valve is filled with a non-aqueous solvent composition comprising 0 to 10 wt. % of N-alkyl pyrrolidone, 0 to 5 wt. % of dimethyl sulfoxide, 10 to 50 wt. % of γ-butyrolactone, 10 to 50 wt. % of at least one monoalcohol, 10 to 60 wt. % of at least one organic solvent inert towards isocyanate groups, other than γ-butyrolactone, other than N-alkyl pyrrolidone, and consisting of carbon, hydrogen, oxygen and, optionally, nitrogen, and 0 to 10 wt. % of at least one additive.