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:
Nov. 04, 2003
Filed:
Oct. 03, 2001
Hirofumi Mitsuo, Shizuoka-ken, JP;
Tsutomu Watanabe, Shizuoka-ken, JP;
Masayuki Iwasaki, Shizuoka-ken, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A heat-sensitive recording material formed of a support having disposed thereon a heat-sensitive color-forming layer that includes an electron-donating leuco-dye and an electron-receiving compound, with the heat-sensitive color-forming layer including, N-(4-hydroxyphenyl)-p-toluenesulfonamide as the electron-donating leuco-dye. The heat-sensitive color-forming layer may include 2-benzyloxynaphthalene or a combination of 2-benzyloxynaphthalene and methylolstearic acid amide as a sensitizer, calcite-type precipitated calcium carbonate light and/or aluminium hydroxide as an inorganic pigment, polyvinyl alcohol having a degree of saponification of 85 to 99 mol % and a degree of polymerization of from 200 to 2000 as an adhesive, and 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and/or 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane as an image stabilizer. When the layer includes 2-benzyloxynaphthalene and methylolstearic acid amide, a ratio (x/y) of 2-benzyloxynaphthalene (x) to methylolstearic acid amide (y) is preferably 95/5 to 40/60. The support can be essentially waste pulp. The heat-sensitive recording material of the present invention may additionally include a protective layer including an inorganic pigment and a water-soluble polymer.