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:
Oct. 30, 2012
Filed:
May. 22, 2008
Owen P. Kasson, Cleveland, OH (US);
Robert A. Martuch, Parma, OH (US);
Celestine O. Ilori, South Euclid, OH (US);
Glenn A. Miller, Fairview Park, OH (US);
Daniel M. Gerow, Avon, OH (US);
Owen P. Kasson, Cleveland, OH (US);
Robert A. Martuch, Parma, OH (US);
Celestine O. Ilori, South Euclid, OH (US);
Glenn A. Miller, Fairview Park, OH (US);
Daniel M. Gerow, Avon, OH (US);
The Sherwin-Williams Company, Cleveland, OH (US);
Abstract
Stable, phosphorescent, water-based coating compositions include a latex emulsion, at least one metal aluminate pigment as a source of phosphorescence, and an effective buffering amount of a buffering agent, which may be an organic acid. The ratio of metal aluminum phosphorescent pigment to latex binder in the latex emulsion may be in the range of about 0.5:1 to about 2.0:1. The effective amount of buffering agent may be from about 0.1% to about 10% with respect to emulsion weight. Compositions according to the present invention may have useful shelf lives of six months or longer. Methods of using the phosphorescent latex coatings and coated substrates are also taught.