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:
Jul. 23, 2013
Filed:
Aug. 21, 2008
Tatsuyuki Kurihara, Tokyo, JP;
Tatsuo Nagai, Tokyo, JP;
Yoshimi Midorikawa, Tokyo, JP;
Akihito Ogino, Tokyo, JP;
Mamoru Suga, Tokyo, JP;
Yoshimune Aosaki, Chikujo-gun, JP;
Tatsuyuki Kurihara, Tokyo, JP;
Tatsuo Nagai, Tokyo, JP;
Yoshimi Midorikawa, Tokyo, JP;
Akihito Ogino, Tokyo, JP;
Mamoru Suga, Tokyo, JP;
Yoshimune Aosaki, Chikujo-gun, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
API Corporation, Toyko, JP;
Abstract
The present invention provides a thermosensitive recording medium with excellent color developing sensitivity, moist heat resistance and plasticizer resistance, as well as excellent heat resistance, background coloring, light resistance and the like in the printed image. A diphenyl sulfone derivative containing a hydroxyl group on one end and an alkoxy group on the other end has a higher melting point than the one containing hydroxyl groups on both ends. As a result, the thermosensitive recording medium obtained using the diphenyl sulfone derivative as the color developing agent in the thermosensitive color developing layer has excellent heat resistance. However the color developing sensitivity of the thermosensitive recording medium generally declines simultaneously, when a color developing agent with a high melting point is ordinarily used. The thermosensitive recording medium of the present invention that uses a combination of the diphenyl sulfone derivative and a specific phenol derivative in the thermosensitive color developing layer has a good color developing sensitivity and an improved balance among the properties such as moist heat resistance, plasticizer resistance and the like.