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:
Sep. 05, 2017
Filed:
May. 01, 2014
Oji Holdings Corporation, Tokyo, JP;
Yoshihiko Yoneda, Tokyo, JP;
Chieko Oshisaka, Tokyo, JP;
Takashi Takemura, Tokyo, JP;
Tohru Murai, Tokyo, JP;
OJI HOLDINGS CORPORATION, Tokyo, JP;
Abstract
A main purpose of the present invention is to provide a heat-sensitive recording medium that utilizes a chromogenic reaction between a dye precursor and a developer, wherein a colored image is tinged with a metallic luster so as to exhibit a gold metal color tone with a vivid appearance, or to provide a heat-sensitive recording medium exhibiting a yellow or gold metal color tone and a color tone different from the yellow or gold metal color tone, wherein the color optical density in each of the color tones is high, and a recording part has excellent color separation properties. The present invention provides a heat-sensitive recording medium comprising a heat-sensitive recording layer containing a dye precursor and a developer on a support, the dye precursor being a dye precursor which is colored to a yellow color tone, wherein: (a) the support has a metallic luster and provides a metallic luster to a surface of a base material not having a metallic luster; and/or (b) the dye precursor which is colored to a yellow color tone is a first dye precursor, and the heat-sensitive recording medium further contains a second dye precursor which is colored to a different color tone from the first dye precursor; the first dye precursor being a compound having a specific pyridine skeleton; and the second dye precursor: (b1) has a form of fine composite particles containing the second dye precursor and a polymer compound; or (b2) has a melting point of 200° C. or more.