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. 18, 1995
Filed:
Jun. 02, 1994
Wayne A Harelstad, Woodbury, MN (US);
Fremont Industries, Inc., Shakopee, MN (US);
Abstract
A final seal rinse or pre-treatment for improving the adhesion and corrosion protection afforded by application of organic coatings to metallic substrates, with the seal rinse comprising an aqueous solution of comprising an effective concentration of (2-benzothiazolylthio) succinic acid and morpholine. The formulation, in a working solution, provides a treatment process which increases the corrosion protection of painted metallic parts, particularly ferrous parts, to an extent previously offered by chromated seal rinses. The seal rinse of the present invention is compatible with fresh water from conventional sources, and is also adapted for use with deionized water including a final deionized water post-rinse. In addition, the formulation of the present invention is particularly adapted for use with materials previously treated with phosphate. A working formulation of the present invention includes (2-benzothiazolylthio) succinic acid and morpholine in an effective concentration wherein the weight ratio of the succinic acid derivative to morpholine ranges from between about 1:0.5 and 1:1, and wherein the pH is between 6 and 10.