EP0173232A2 - Feuille thermosensible pour l'enregistrement - Google Patents

Feuille thermosensible pour l'enregistrement Download PDF

Info

Publication number
EP0173232A2
EP0173232A2 EP85110455A EP85110455A EP0173232A2 EP 0173232 A2 EP0173232 A2 EP 0173232A2 EP 85110455 A EP85110455 A EP 85110455A EP 85110455 A EP85110455 A EP 85110455A EP 0173232 A2 EP0173232 A2 EP 0173232A2
Authority
EP
European Patent Office
Prior art keywords
heat
sensitive recording
recording sheet
isopropoxy
sensitizer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85110455A
Other languages
German (de)
English (en)
Other versions
EP0173232A3 (en
EP0173232B1 (fr
Inventor
Toshimi Central Research Laboratory Satake
Toshiaki Central Research Laboratory Minami
Kazuo Central Research Laboratory Maruyama
Fumio Central Research Laboratory Fujimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jujo Paper Co Ltd
Original Assignee
Jujo Paper Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jujo Paper Co Ltd filed Critical Jujo Paper Co Ltd
Publication of EP0173232A2 publication Critical patent/EP0173232A2/fr
Publication of EP0173232A3 publication Critical patent/EP0173232A3/de
Application granted granted Critical
Publication of EP0173232B1 publication Critical patent/EP0173232B1/fr
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/337Additives; Binders
    • B41M5/3375Non-macromolecular compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/333Colour developing components therefor, e.g. acidic compounds
    • B41M5/3333Non-macromolecular compounds
    • B41M5/3335Compounds containing phenolic or carboxylic acid groups or metal salts thereof
    • B41M5/3336Sulfur compounds, e.g. sulfones, sulfides, sulfonamides

Definitions

  • the invention relates to a heat-sensitive recording sheet which is suitable for clear, intensive recordings at high speed and has a superior shelf life.
  • a heat-sensitive recording sheet is generally made by applying a coating to the surface of a support such as paper, film, etc., which is prepared by finely grinding and dispersing a colorless chromogenic substance and a color developing material, e.g. such as a phenolic substance, mixing the dispersions obtained together and adding a binder, filler, sensitizer, lubricant and other auxiliaries.
  • a support such as paper, film, etc.
  • a color developing material e.g. such as a phenolic substance
  • the coating Due to the effect of heat or heat, the coating is instantly chemically converted to form a color. Depending on the choice of specific, colorless, chromogenic substances, various clear colors can be obtained.
  • Bisphenol A 4,4'-isopropylidenediphenol
  • the heat sensitive recording sheet has been required to have a high recording speed and a superior image. Therefore, the applicant has described in JP-OS 144193/1981 that when a fluoran dye and p-hydroxybenzoic acid benzyl ester are used in combination as a color developing agent, a heat-sensitive recording sheet having superior dynamic image density and high sensitivity can be easily obtained.
  • the heat-sensitive recording sheets using p-hydroxybenzoic acid benzyl ester as a color developing agent have the disadvantages in terms of the stability of the image that the density of the image formed when the heat is applied decreases with the lapse of time, and that the p-hydroxybenzoic acid benzyl ester melted when the heat is applied decreases with that Recrystallized over time, forming white crystals.
  • the object of the invention is to provide a heat-sensitive recording sheet which has superior image stability, i.e. a stable recording image when stored for a long time; which, in particular, does not discolor the image under high air humidity, high temperature, etc., or discolor the background.
  • both 4-isopropyl-4'-hydroxydiphenylsulfone of the formula (I) below and organic in the color-forming layer Color developing agent and at least one compound from the group of substances of the following general formulas (II) or (III) contains as a sensitizer: wherein A is an H or halogen atom, .N0 2 , lower alkyl, lower alkoxy or hydroxyl group; 1 represents an integer from 1 to 5; and m represents an integer from 0 to 3.
  • the lower alkyl or lower alkoxy group (A) usually has 1 to 5 carbon atoms:
  • lower alkyl groups are the methyl, ethyl, n-propyl, isopropyl, n- Butyl, sec-butyl and tert-butyl groups.
  • lower alkoxy groups are the methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, sec-butoxy and tert-butoxy groups.
  • the 4-isopropoxy-4'-hydroxydiphenyl sulfone as the organic color developing agent according to the invention has a melting point of 129-130 ° C.
  • a known sensitizer such as stearic acid amide, benzyl p-benzyloxybenzoate, dibenzyl terephthalate, di-p-tolyl carbonate, etc.
  • the combined use of the organic color developing agent according to the invention with a sensitizer of the formulas (II) or (III) leads to a improved dynamic image density
  • the reason for this can be attributed to the fact that the 4-isopropoxy-4'-hydroxydiphenylsulfone as a color developing agent has a high solution diffusion rate and very high solubility in the sensitizer according to the invention, namely that the sensitizer of the general form In (II) or (III) has a large one Has solvency for 4-isopropoxy-4'-hydroxydiphenyl sulfone.
  • the sensitizer according to the invention also has a high solubility for a basic colorless dye.
  • SensiDilisators according to the invention of the general formulas (II) and (III) are:
  • the addition amount for the sensitizer according to the invention of the general formulas (II) or (III) is preferably 10-100% by weight, based on the 4-isopropoxy-4'-nydroxydiphenylsulfone as an organic color developing agent.
  • sensitizer With an addition of sensitizer of less than 10 percent by weight, the effect is small, but with an addition of more than 100 percent by weight , the image density is reduced because the organic color developing agent is diluted because of the large amount of sensitizer.
  • suitable basic colorless or weakly faroigen chromogenic dyes are dyes of the triphenylmethane, fluoran and A zaphthalid Race, for example of the following type:
  • the above-mentioned organic color developing agent, the above-mentioned basic colorless dye and the sensitizer are mixed by means of a grinder, e.g. a ball mill, grinder, sand grinder etc. or ground to a particle size of several microns or smaller using a suitable emulsifying machine.
  • a grinder e.g. a ball mill, grinder, sand grinder etc. or ground to a particle size of several microns or smaller using a suitable emulsifying machine.
  • additives are added, depending on the intended use, in order to produce the coating composition.
  • the additives which can be used according to the invention are, for example, the following: binders, such as polyvinyl alcohol, are more modified Polyvinyl alcohol, hydroxyethyl cellulose, methyl cellulose, starch, styrene-maleic anhydride copolymers, vinyl acetate-maleic anhydride copolymers, styrene-butadiene copolymers, etc .; inorganic or organic fillers such as kaolin, baked kaolin, diatomaceous earth, talc, titanium dioxide, aluminum hydroxide, etc .; Release agents such as metal salts of fatty acids; Lubricants such as waxes; UV adsorbents of the benzophenone and triazole series; waterproofing agents such as glyoxal, etc .; Dispersing agents, anti-foaming agents, mottoling-preventing agents (for example fatty acid amide), etc
  • the kind and the amount of the organic color developing agent, the basic colorless dye, the sensitizer and the other components, which are determined depending on the desired effect and suitability for recording purposes, are not particularly limited. It is generally advantageous to use 3 to 12 parts by weight of 4-isopropoxy-4'-hydroxydiphenylsulfone as a color developing agent, 3 to 12 parts by weight of sensitizer and 1 to 20 parts by weight of filler based on 1 part by weight of the basic colorless dye, and 10 to 25 parts by weight of binder, based on the total substance content, to be used.
  • Solution B (dispersion of a color developing agent):
  • the heat-sensitive recording sheet was produced according to Example 1, but without using solution C. The result is summarized in Table 1.
  • the heat-sensitive recording sheets were produced according to Example 1, but with solution D instead of solution C.
  • Solution E (dispersion of the color developing agent) bisphenol A 6 parts Zinc stearate 1 part 10% aqueous solution of polyvinyl alcohol 29.5 parts water 5.5 parts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
EP85110455A 1984-08-23 1985-08-20 Feuille thermosensible pour l'enregistrement Expired EP0173232B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP175374/84 1984-08-23
JP59175374A JPS6153084A (ja) 1984-08-23 1984-08-23 感熱記録紙

Publications (3)

Publication Number Publication Date
EP0173232A2 true EP0173232A2 (fr) 1986-03-05
EP0173232A3 EP0173232A3 (en) 1986-10-29
EP0173232B1 EP0173232B1 (fr) 1989-11-08

Family

ID=15994981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110455A Expired EP0173232B1 (fr) 1984-08-23 1985-08-20 Feuille thermosensible pour l'enregistrement

Country Status (4)

Country Link
US (1) US4644375A (fr)
EP (1) EP0173232B1 (fr)
JP (1) JPS6153084A (fr)
DE (1) DE3574117D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289041A3 (en) * 1987-04-30 1990-05-30 Jujo Paper Co., Ltd. Thermosensitive recording sheet
EP0358193A3 (fr) * 1988-09-07 1991-03-20 Kanzaki Paper Manufacturing Co., Ltd. Matériau d'enregistrement thermosensible
EP0422680A3 (en) * 1989-10-13 1991-06-05 Jujo Paper Co., Ltd. Heat-sensitive recording sheet
EP0559386A3 (en) * 1992-02-28 1994-07-20 Jujo Paper Co Ltd Thermal recording sheet
EP0561558A3 (en) * 1992-03-18 1995-03-29 Jujo Paper Co Ltd Thermal recording sheet
WO2000066364A1 (fr) * 1999-04-28 2000-11-09 Nippon Steel Chemical Co., Ltd. Materiau pour thermogravure

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH068073B2 (ja) * 1985-04-09 1994-02-02 三菱製紙株式会社 感熱記録材料
US4688058A (en) * 1985-11-20 1987-08-18 Mitsubishi Paper Mills, Ltd. Thermal recording materials
JPH0777829B2 (ja) * 1987-11-09 1995-08-23 三菱製紙株式会社 感熱記録材料
DE3924929A1 (de) * 1988-07-27 1990-02-01 Fuji Photo Film Co Ltd Aufzeichnungsmaterial
DE68918394T2 (de) * 1988-11-02 1995-01-19 Oji Paper Co Wärmeempfindliches Aufzeichnungsmaterial.
JP2520335B2 (ja) * 1991-07-05 1996-07-31 北越製紙株式会社 耐薬品性、耐文具性に優れた感熱記録体

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857989A (ja) * 1981-10-02 1983-04-06 Fuji Photo Film Co Ltd 感熱記録材料
JPS5882788A (ja) * 1981-11-11 1983-05-18 Fuji Photo Film Co Ltd 感熱記録材料
JPS59197463A (ja) * 1983-04-26 1984-11-09 Shin Nisso Kako Co Ltd フルオラン化合物
JPS6013852A (ja) * 1983-07-04 1985-01-24 Shin Nisso Kako Co Ltd ジフエニルスルホン誘導体およびそれを含有する発色性記録材料
JPS6079996A (ja) * 1983-10-11 1985-05-07 Ueno Seiyaku Oyo Kenkyusho:Kk 感熱記録紙
DE3477164D1 (en) * 1983-10-14 1989-04-20 Nippon Steel Chemical Co Thermal recording material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289041A3 (en) * 1987-04-30 1990-05-30 Jujo Paper Co., Ltd. Thermosensitive recording sheet
EP0358193A3 (fr) * 1988-09-07 1991-03-20 Kanzaki Paper Manufacturing Co., Ltd. Matériau d'enregistrement thermosensible
EP0422680A3 (en) * 1989-10-13 1991-06-05 Jujo Paper Co., Ltd. Heat-sensitive recording sheet
EP0559386A3 (en) * 1992-02-28 1994-07-20 Jujo Paper Co Ltd Thermal recording sheet
EP0561558A3 (en) * 1992-03-18 1995-03-29 Jujo Paper Co Ltd Thermal recording sheet
WO2000066364A1 (fr) * 1999-04-28 2000-11-09 Nippon Steel Chemical Co., Ltd. Materiau pour thermogravure
EP1199185A4 (fr) * 1999-04-28 2004-10-06 Nippon Steel Chemical Co Materiau pour thermogravure

Also Published As

Publication number Publication date
US4644375A (en) 1987-02-17
DE3574117D1 (en) 1989-12-14
JPS6153084A (ja) 1986-03-15
EP0173232A3 (en) 1986-10-29
JPH04477B2 (fr) 1992-01-07
EP0173232B1 (fr) 1989-11-08

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