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:
Jun. 25, 2013
Filed:
Apr. 02, 2010
Yoshimune Aosaki, Fukuoka, JP;
Mai Kaneko, Fukuoka, JP;
Katsuto Ohse, Tokyo, JP;
Yukiko Sato, Tokyo, JP;
Yoshimune Aosaki, Fukuoka, JP;
Mai Kaneko, Fukuoka, JP;
Katsuto Ohse, Tokyo, JP;
Yukiko Sato, Tokyo, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
API Corporation, Osaka, JP;
Abstract
Provided are a coating solution for a thermosensitive color developing layer of excellent storability wherein color development during its storage or during producing a thermal recording material is suppressed, and a thermal recording material with excellent print portion (image portion) storability and suppressed staining in the background color (white background). A coating solution for a thermosensitive color developing layer, which comprises a colorless or pale-colored electron-donating leuco dye, a hindered phenol compound and, as an electron-accepting developer, a diphenylsulfone derivative represented by the following formula (1): wherein the aforementioned hindered phenol compound has an average particle size (D50) of not more than 0.5 μm, and the coating solution has a color tone a* of not less than −4.0 as measured according to JIS Z 8729 and a whiteness W of not less than 62 as measured according to JIS Z 8715.