The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2003
Filed:
Oct. 02, 2001
Multi-stage processes for coating substrates with a first powder coating and a second powder coating
Donaldson J. Emch, Goodrich, MI (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
Processes for coating metal or polymeric substrates are provided which include the steps of: (a) applying a first powder coating composition to a surface of the substrate; (b) applying a first infrared radiation at a power density of 30 kilowatts per meter squared or less and optionally a first air simultaneously to the first coating composition for a first period of at least about 90 seconds such that a sintered first coating is formed upon the surface of the substrate; (c) applying a second powder coating composition over the first coating; and (d) applying a second infrared radiation at a power density of 30 kilowatts per meter squared or less and a second air at an air velocity ranging from about 0.5 to about 13 meters per second simultaneously to the second coating composition for a second period of at least about 2 minutes, such that a powder layered system is formed upon the surface of the substrate.