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:
Jan. 26, 1999
Filed:
May. 27, 1997
Timothy J Sanford, Randolph, NY (US);
Lilly Industries (USA), Inc., Indianapolis, IN (US);
Abstract
A lead-free composition capable of being applied as a film and hardening to form a protective layer on the back of a mirror comprises a fluid organic resin and a corrosion inhibitor selected from a compound represented by the formula: ##STR1## wherein the individual radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be identical or different and are each hydrogen, an aliphatic, cycloaliphatic, araliphatic or aromatic radical, and can be substituted or unsubstituted; A is hydrogen or C.sub.z --CR.sup.5 R.sup.6 CN; X, Y and Z are independently selected from 0-5; and R.sup.5 and R.sup.6 are as defined for R.sup.1, R.sup.2, R.sup.3 and R.sup.4 above. To inhibit the corrosion of metallic film layers on mirrors, a mirror having a glass substrate layer and metallic film layer thereover should be obtained, after which the fluid organic resin coating system containing the aforementioned corrosion inhibitor is applied over the metallic film layer. The organic resin coating system is then hardened to produce the protective coating layer over the metallic layer. Other articles having metallic surfaces may also be protected by the resin system containing the novel corrosion inhibitor of the present invention.