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. 13, 2004
Filed:
Oct. 24, 2002
Applicant:
Inventors:
Assignee:
PPG Industries Ohio, Inc., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 1/36 ; B05D 7/16 ;
U.S. Cl.
CPC ...
B05D 1/36 ; B05D 7/16 ;
Abstract
An improved process for applying a coating to an untreated ferrous metal substrate is disclosed. The substrate does not need to be phosphated or subjected to any other conversion coating prior to treatment. The process includes contacting the substrate surface first with a solution comprising a Group IIIB and/or IVB metal-containing compound and a nitrate, and then with a second solution comprising a reaction product of an epoxy and an amine, phosphorus or sulfur-containing compound. A film-forming resin is then deposited on the substrate and cured. Substrates treated by the process of the present invention demonstrate excellent corrosion resistance and are also disclosed herein.