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:
May. 05, 1992
Filed:
Apr. 12, 1990
Kanzaki Paper Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A heat-sensitive recording material comprises a recording layer formed on a base sheet where the recording layer comprises a colorless or pale colored basic chromogenic material, a color developing material which develops a color by contacting with said chromogenic material, and a stabilizer. The recording layer comprises at least one selected from the group consisitng of 3-(N-methyl-N-cyclohexyl)amino-6-methyl-7-phenylaminofluoran, 3-diethylamino-6-methyl-7-phenylaminofluoran and 3-(N-ethyl-N-tetrahydrofurfuryl)amino-6-methyl-7-phenylaminofluoran together with 3-di(n-butyl)amino-6-methyl-7-phenylaminofluoran as the chromogenic material, and at least one selected from the group consisting of 1,1,3-tris(3-cyclohexyl-4-hydroxy-6-methylphenyl)butane, 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and 4,4'-cyclohexylidenediphenol as the stabilizer, so that a heat-sensitive recording material in which both of the brightness of the background area and the optical density of the recorded images are stably maintained under high temperature condition can be obtained.