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:
Mar. 13, 2001
Filed:
May. 26, 1999
Donaldson J. Emch, Brighton, MI (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
Processes for drying primer coating compositions applied to a surface of a substrate are provided in which the primer coating composition, if a liquid or powder slurry, is exposed to low velocity air having a temperature ranging from about 10° C. to about 50° C. for a period of at least about 30 seconds to volatilize at least a portion of volatile material from the liquid primer coating composition. Next, infrared radiation and low velocity warm air are applied simultaneously to the primer coating composition (liquid, powder slurry or powder) for a period of at least about 1 minute during which the temperature of the substrate is increased at a rate ranging from about 0.2° C. per second to about 2° C. per second to achieve a peak substrate temperature of the substrate ranging from about 30° C. to about 120° C. Infrared radiation and hot air are applied simultaneously to the primer composition for a period of at least about 2 minutes during which the temperature of the substrate is increased at a rate ranging from about 0.1° C. per second to about 10° C. per second to achieve a peak temperature of the substrate ranging from about 40° C. to about 155° C., such that a dried primer coating is formed upon the surface of the substrate.