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. 02, 2003
Filed:
Jul. 31, 2001
Ronald R. Ambrose, Pittsburgh, PA (US);
Anthony M. Chasser, Allison Park, PA (US);
Shengkui Hu, Baden, PA (US);
Jackie L. Smith, Mars, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
The present invention provides a crosslinking agent which may have reactive benzoxazine groups prepared from (a) at least one aromatic compound, (b) at least one aminotriazine compound, and (c) at least one other compound having active hydrogen groups reactive with aminoplast compound (b). The crosslinking agent is essentially free of hydroxyl functionality and has a glass transition temperature of at least 25° C. The present invention is further directed to a method for preparing the above-described crosslinking agent, and a curable powder coating composition comprising a mixture of (A) a polymer having functional groups reactive with aminotriazine and/or benzoxazine groups having a glass transition temperature of at least 30° C.; and (B) the above crosslinking agent. Multilayer composite coating compositions are also provided including a basecoat deposited from a film-forming composition and a topcoat over the basecoat, deposited from the curable powder coating composition described above. Coated substrates are also provided.