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US 6,280,800 B1Granted
Process for coating metallic substrate surfaces
AssigneeE. I. Du Pont de Nemours and Company
InventorsOlaf Thiele, Frank Zimmermann
Life of this patent
Estimating the term…
Abstract
Metal surfaces which are pre-treated with high-energy NIR-radiation and then coated with a powder or a liquid coating composition, followed by curing or drying the coating composition, show better adhesion to the coating and improved appearance and performance and the process is more cost effective.
Claims9
Process for coating metal surfaces comprising the steps of:
- (a) cleaning an uncoated metal surface by irradiation with high-energy NIR-radiation;
- and
- (b) applying a coating composition to the cleaned uncoated metal surface, said coating composition selected from the group consisting of powder compositions and liquid compositions.
A coated metal surface prepared by a process in which the metal surface is cleaned by irradiation with high-energy NIR-radiation prior to any coating being applied thereto;
- and then applying a coating composition to the cleaned metal surface, wherein said coating composition is selected from the group consisting of powder compositions and liquid compositions.
Process for coating metal surfaces comprising the steps of:
- (a) cleaning the entire metal surface to be coated by exposing said surface to high-energy NIR-radiation;
- and
- (b) applying a coating composition to the cleaned metal surface, said coating composition selected from the group consisting of powder compositions and liquid compositions.
Dependencies are inferred from the claim text.