Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
  • G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic compounds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
  • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
  • B41M5/323—Organic colour formers, e.g. leuco dyes
  • B41M5/327—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
  • B41M5/3275—Fluoran compounds
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/913—Material designed to be responsive to temperature, light, moisture
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/914—Transfer or decalcomania
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/146—Laser beam

Definitions

• the invention relates to a heat- and light-sensitive recording material which gives an image when heat and light energy is supplied and a recording method.
• a heat-sensitive recording material is produced as follows:
• a coating composition is applied to the surface of a carrier such as paper, synthetic paper, film, plastic, etc., by finely grinding and dispersing a colorless chromogenic substance and a color development material, mixing the dispersions obtained with one another and adding a binder, filler, sensitizer, lubricant and other aids have been obtained.
• An instantaneous chemical occurs under the influence of heat from the thermal spring, thermal head, thermal stamp, laser beam, etc. Implementation that leads to the recording.
• heat-sensitive recording method include the application in technical recording devices, terminal printers of computers, printers of facsimile machines, ticket machines, printers for barcode notes and the like.
• the heat sensitive sheet must contain a basic colorless dye as an electron donating material. Both this dye and a Lewis acid are generally contained in the same layer, so that contamination due to inevitable color development may occur in the heat-sensitive recording sheet manufacturing process, storage or handling of the unused recording sheet.
• the recording material according to the invention is a heat and light-sensitive recording material which has a color formation layer on a support which contains an electron-donating compound but no electron-accepting compound, the electron-donating compound having at least one fluoran dye of the following general formula (I) contains; wherein at least one of the radicals R1, R2, R3, R4, R5, R6, R7, R8 and R9 is a group of the general formula means; wherein T1, T2 and T3 are the same or different and each represents a hydrogen atom, a C1-C8 alkyl, C3-C9 alkenyl or C3-C9 alkynyl group; T4 represents a hydrogen atom, a C1-C8 alkyl, C3-C9 alkenyl, C3-C9 alkynyl group or phenyl group; T3 and T4 can also be connected to an adjacent nitrogen atom to form a pyrrolidino, morpholino, piperidino or hexamethyleneimino group
• the alkyl groups preferably have 1 to 6 carbon atoms
• the cycloalkyl groups preferably have 3 to 6 carbon atoms
• the substitution of the amino groups preferably consists of a mono- or di-C1-C6-alkyl substitution
• the aryl groups are preferably phenyl radicals.
• the dyes of the following general formula (II) prefers.
• 2-methyl-6-p- (p-dimethylaminophenyl) aminoanilinofluoran (melting point: 197-203 ° C.) of the following formula (III) and 2-chloro-3-methyl-6-p- (p-phenylaminophenyl) aminoanilinofluoran (melting point: 191.5-196 ° C) of the following formula (IV) is most preferred.
• fluoranleuco dyes are not subject to any particular restrictions; the following can be used, for example: 2-methyl-6-p- (p-dimethylaminophenyl) aminoani linofluoran, 2-methoxy-6-p- (p-dimethylaminophenyl) aminoanilinofluoran, 2-chloro-6-p- (p-dimethylaminophenyl) aminoanilinofluoran, p-nitro-6-p- (p-di ethylaminophenyl) aminoanilinofluoran, 2- Amino-6-p- (p-dimethylaminophenyl) aminoanilinofluoran, 2-diethylamino-6-p- (p-dimethylaminophenyl) aminoanilinofluoran, 2-phenyl-6-p- (p-phenylaminophenyl) aminoanilinofluoran, 2-benzyl-6-p
• the fluoranleuco dyes of the general formula (I) according to the invention are used alone or in a mixture.
• the color formation layer according to the invention contains the above basic colorless chromogenic dye, optionally a heat-fusible material, binder and other additives.
• the heat-fusible material according to the invention contains no electron-accepting compound, but improves the color development sensitivity.
• Typical examples of the heat-fusible materials according to the invention are: fatty acid amides such as stearinamide, palmitinamide, etc .; Ethylene bisamide; Montan wax; Polyethylene wax; Dimethyl terephthalate; benzyl p-benzyloxybenzoate; Dibenzyl terephthalate; ⁇ -naphthyl benzoate; N-acetyldiphenylamine; p-nitrobenzoic acid methyl ester; Diphenyl carbonate; methyl p-benzyloxybenzoate; p-nitrobenzaldehyde; Fluorene; Phenanthrene; ⁇ -naphthoquinone; 4 ⁇ -t-butylbenzyl 4- (4 ⁇ -t-butylbenzyloxy) benzoate; 4,4 ⁇ -n-butoxydiphenyl sulfone; p-tolyl carbonate; m-tolyl carbonate; o-tolyl carbon
• Binders according to the invention are, for example, completely saponified polyvinyl alcohol, degree of polymerization: 200-1900, partly saponified polyvinyl alcohol, carboxylated polyvinyl alcohol, amide-modified polyvinyl alcohol, sulfonic acid-modified polyvinyl alcohol, butyral-modified polyvinyl alcohol, other modified polyvinyl alcohols, Hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose, styrene-maleic anhydride copolymers, styrene-butadiene copolymers, cellulose derivatives such as ethyl cellulose and acetyl cellulose, polyvinyl chloride, polyvinyl acetate, polyacrylamide, polyacrylic acid ester, polyvinyl butyral, polystyrene resin, polyamide resin, copolymers, the above, and coumarone resin.
• These high molecular weight binders can be used after being dissolved in
• the type and amount of the basic colorless chromogenic dye according to the invention, the heat-fusible material, the other additives, which are selected depending on the desired effect and the suitability for recording purposes, are not particularly limited. In general, it is advantageous to use 1 to 8 parts by weight of the heat-fusible material, 1 to 20 parts by weight of filler and 10 to 25 parts by weight of binder for binding the dye, based on 1 part by weight of the basic colorless chromogenic dye to use.
• the heat and light sensitive material according to the invention is produced by applying the coating composition to a base material such as paper, synthetic paper, film, plastic, etc.
• a base material such as paper, synthetic paper, film, plastic, etc.
• the above basic colorless chromogenic dye according to the invention and optionally the other additives are ground to a particle size of several microns or smaller by means of a grinding device such as a ball mill, attritor, sand grinder, etc., or by means of a suitable emulsifying machine. Various additives are added to this.
• the additives which can be used according to the invention are, for example, the following: Fillers; Release agents for preventing sheet sticking such as metal salts of fatty acids; Mottling prevention lubricants such as fatty acid amides, ethylene bisamide, montan wax, polyethylene wax, etc .; Dispersants such as sodium dioctylsulfosuccinic acid, sodium dodecylbenzenesulfonate, sodium auryl alcohol sulfate, sodium alginate, etc .; UV absorbers of the benzophenone and triazole series; Anti-foaming agents; waterproofing agents, etc.
• Fillers both anor ganic as well as organic fillers used in the paper processing field are used.
• fillers according to the invention are alumina, talc, silicon dioxide, magnesium carbonate, aluminum hydroxide, magnesium hydroxide, barium sulfate, kaolin, titanium dioxide, zinc oxide, calcium carbonate, aluminum oxide, urea-formaldehyde resin, polystyrene resin, phenolic resin, etc.
• a recording material having a color formation layer is used.
• the thermal pattern is generated using a thermal spring, a thermal head, laser beams, etc.
• the light irradiation is carried out with a black light lamp, xenon lamp, carbon arc lamp, etc., UV light being the most suitable.
• the exposure time is very short see you shortly. It is at most a few minutes.
• the time interval between the end of the thermal recording and the exposure depends on the conditions of the recording method according to the invention. This means that the exposure can take place immediately, a few months (storage) or a few years (storage) after the thermal recording.
• the recording image obtained absorbs light from the visible range to the near infrared range, ie light from 370-2000 nm.
• the fluoranleuco dye according to the invention has the following structural component, in which two benzene nuclei are bonded to the fluorine skeleton in the molecule by three nitrogen atoms:
• This part of the structure is photochemically active during exposure and forms an absorption point that absorbs light in the near infrared range.
• the basic colorless chromogenic dye When heat energy is supplied, the basic colorless chromogenic dye is activated with melting, and when light energy is supplied, the above photochemical reaction occurs, so that color formation occurs.
• Dispersion A (dye dispersion)
• Dispersion A (dye dispersion) 9.2 parts Kaolin clay dispersion (50% dispersion) 12 parts
• the coating composition was applied in a coating amount of 6.0 g / m2 on a base paper with a weight of 50 g / m2, dried and supercalendered to achieve a smoothness of 200-600 seconds.
• a heat and light sensitive recording sheet was obtained.
• Dispersion B (dispersion of thermofusible material)
• Heat fusible material See Table 1.
• Dispersion A (dye dispersion) 9.2 parts
• Dispersion B (dispersion of thermofusible material) 36 parts Kaolin clay (50% dispersion) 12 parts
• a heat and light sensitive recording sheet was obtained in the same manner as in Example 1 using this coating composition.
• a heat and light sensitive recording sheet was obtained in the same manner as in Example 1, but using the following dispersion C instead of dispersion A.
• 3-diethylamino-6-methyl-7-anilinofluoran is a black colorant dye that is commonly used and is 3,6,6 ⁇ -tris (dimethylamino) spiro [fluorene-9,3 ⁇ -phthalide] a dye in which the superior optical legibility of the colored image was found in the near infrared range.

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• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Optics & Photonics (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• General Physics & Mathematics (AREA)
• Heat Sensitive Colour Forming Recording (AREA)

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Citations (5)

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• 1987
  • 1987-04-17 JP JP62094595A patent/JPH066396B2/ja not_active Expired - Fee Related
• 1988
  • 1988-04-14 US US07/181,711 patent/US4853361A/en not_active Expired - Lifetime
  • 1988-04-15 EP EP88106064A patent/EP0287121B1/fr not_active Expired - Lifetime
  • 1988-04-15 DE DE8888106064T patent/DE3882779D1/de not_active Expired - Fee Related

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