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:
Sep. 18, 2001
Filed:
May. 26, 1999
Donaldson J. Emch, Brighton, MI (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
A process for coating a metal substrate includes: (a) applying a liquid basecoating composition to a surface of the substrate; (b) exposing the basecoating composition to air having a temperature ranging from about 10° C. to about 30° C. for a period of at least about 30 seconds to volatilize at least a portion of volatile material from the liquid basecoating composition, the velocity of the air at a surface of the basecoating composition being less than about 0.5 meters per second; (c) applying infrared radiation and warm air simultaneously to the basecoating composition for a period of at least about 30 seconds, the velocity of the air at the surface of the basecoating composition being less than about 4 meters per second, the temperature of the substrate being increased at a rate ranging from about 0.02° C. per second to about 0.4° C. per second to achieve a peak temperature of the substrate ranging from about 20° C. to about 60° C.; (d) applying infrared radiation and hot air simultaneously to the basecoating composition for a period of at least about 30 seconds, the temperature of the substrate being increased at a rate ranging from about 0.4° C. per second to about 1.5° C. per second to achieve a peak temperature of the substrate ranging from about 40° C. to about 75° C., such that a dried basecoat is formed upon the surface of the substrate; and (e) applying a liquid topcoating composition over the dried basecoat. A similar process for coating a polymeric substrate also is provided.