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US 2003/0191023 A1Published application
Thermosensitive recording material
AssigneeFuji Photo Film Co., Ltd.
InventorsSatoshi Higuchi, Shunsaku Higashi, Hisahiro Mori
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AssigneeFuji Photo Film Co., Ltd.
InventorsSatoshi Higuchi, Shunsaku Higashi, Hisahiro Mori
Estimating the term…
The present invention provides a thermosensitive recording material comprising a support and a thermosensitive recording layer containing, as color forming components, an electron donating dye precursor encapsulated in microcapsules and an electron accepting compound, the electron accepting compound containing a salicylic acid metal salt represented by the following General Formula (1): 1 wherein R11, R12, R13, and R14 independently represent one of a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acyl group, a carbamoyl group, a sulfamoyl group, a sulfonamide group, a cyano group, and a nitro group; two adjacent groups in R11, to R14 may bond to each other to form a ring; M represents a metal ion having a valence of n; and n represents an integer of from 1 to 3.
A thermosensitive recording material comprising:
Dependencies are inferred from the claim text.
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Non-macromolecular compounds: compounds containing phenolic or carboxylic acid groups or metal salts thereof
Using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form…:…
With a lactone or lactam ring: fluoran compounds
Additives; Binders: inorganic compounds, e.g. metal salts of organic acids
Term end not estimated
1. Field of the Invention
The present invention relates to a thermosensitive recording material containing an electron donating dye precursor encapsulated in microcapsules and an electron accepting compound, and particularly to a thermosensitive material having superior color formation density and light fastness in image areas.
2. Description of the Related Art
The present invention will be described in detail with reference to the following Examples, but the invention is not limited thereto. All “part” and “%” are on a mass basis unless otherwise indicated.
1) Preparation of electron donating colorless dye capsule liquid:
In 7.97 g of ethyl acetate was dissolved 3.23 g of 3-(o-acetylamino-p-dipropylaminophenyl)-3-(l-octyl-2-methylindole-3-yl)-4-azaphthalide (represented by the following formula) as an electron donating dye precursor, and 2.55 g of a solvent with a high boiling point (trade name: KMC-113, manufactured by Kureha Chemical Industry Co., Ltd.) was added to the resultant solution, followed by uniformly mixing. To the obtained mixed liquid (liquid X) was added 10.35 g of a capsule wall material (trade name: Takenate D119N, manufactured by Takeda Chemical Industries, Ltd.), and the resultant mixture was uniformly stirred. Separately, the liquid X was added to a mixture of 24.45 g of a 8% aqueous solution of #810 gelatin manufactured by Nitta Gelatin Inc., 4 g of water, and 0.04 g of Sucraph AG-8 (manufactured by Nippon Fine Chemical Co., Ltd.), and the resultant mixture was subjected to emulsification and dispersion by using a homogenizer at 40° C. and at a revolution number of 7,500 rpm for 7 minutes, to obtain an emulsion. To this emulsion were added 21.25 g of water and 0.05 g of tetraethylenepentamine, and the resultant mixture was stirred at 40° C. for 3 hours to cause encapsulation reaction. A desired capsule liquid was thus prepared. Incidentally, the microcapsules in the capsule liquid had a mean particles size of about 1.2 μm. 17