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. 14, 2009
Filed:
Mar. 30, 2007
Billie JO Enciu, Lexington, KY (US);
Elaine Yeap Money, Lexington, KY (US);
Billie Jo Enciu, Lexington, KY (US);
Elaine Yeap Money, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
The present invention provides an aqueous ink containing ≧3% silver particles having much improved adhesion. It has been found that the adhesion can be improved by adding an aqueous cationic dispersion of a styrene/acrylate copolymer, PEI (polyethyleneimine), or arabinogalactan as an additive to the ink. The advantage of using one of these materials to improve the adhesion of the silver ink is the stability of the ink is maintained and the resistivity goal is met when printed onto the specified media. In other words, this invention provides a silver ink with great adhesion properties while still able to meet the <0.1 Ω/square resistivity requirement and remain stable for up to 4 weeks at 60° C. at accelerated oven aging conditions.