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. 03, 2017
Filed:
Nov. 05, 2013
The Nippon Synthetic Chemical Industry Co., Ltd., Osaka, JP;
Masahiro Saito, Osaka, JP;
Mayuka Kuroda, Osaka, JP;
THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD., Osaka, JP;
Abstract
A heat-sensitive color-developing layer of a heat-sensitive recording medium and a coating liquid for forming the heat-sensitive color-developing layer each contain a leuco dye, a color developing agent and a polyvinyl alcohol resin containing an acetoacetyl group and a sulfonic acid group or a combination of a polyvinyl alcohol resin containing an acetoacetyl group and a polyvinyl alcohol resin containing a sulfonic acid group. Therefore, the heat-sensitive recording medium and the coating liquid for forming the heat-sensitive color-developing layer are excellent in light resistance, and free from unintended color development and discoloration even when exposed to ultraviolet radiation.