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:
Aug. 12, 1986
Filed:
Oct. 03, 1985
Applicant:
Inventors:
Roger M Christenson, Gibsonia, PA (US);
Joseph T Valko, Pittsburgh, PA (US);
Joseph E Plasynski, Arnold, PA (US);
Roger L Scriven, Gibsonia, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ;
U.S. Cl.
CPC ...
2041817 ;
Abstract
Formaldehyde-containing cationic electrodepositable compositions to which are added a formaldehyde scavenger are disclosed. Also disclosed are the use of these compositions in a method of cationic electrodeposition. Free formaldehyde in cationic compositions can lower the pH of the compositions making them more corrosive to the metal parts such as ferrous metal tanks and attending piping and pumps in contact with such compositions. The presence of the formaldehyde scavenger in such compositions stabilizes the pH.