WO2005087502A1 - 4−ヒドロキシ−4'−イソプロポキシジフェニルスルホン顕色剤の分散液、湿式粉砕方法および感熱記録体 - Google Patents
4−ヒドロキシ−4'−イソプロポキシジフェニルスルホン顕色剤の分散液、湿式粉砕方法および感熱記録体 Download PDFInfo
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- WO2005087502A1 WO2005087502A1 PCT/JP2005/004535 JP2005004535W WO2005087502A1 WO 2005087502 A1 WO2005087502 A1 WO 2005087502A1 JP 2005004535 W JP2005004535 W JP 2005004535W WO 2005087502 A1 WO2005087502 A1 WO 2005087502A1
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- 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
- B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
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- 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
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
- B41M5/3335—Compounds containing phenolic or carboxylic acid groups or metal salts thereof
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- 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
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- 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
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
- B41M5/3335—Compounds containing phenolic or carboxylic acid groups or metal salts thereof
- B41M5/3336—Sulfur compounds, e.g. sulfones, sulfides, sulfonamides
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- 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
- B41M5/337—Additives; Binders
- B41M5/3375—Non-macromolecular compounds
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- 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
- B41M5/34—Multicolour thermography
Definitions
- the present invention relates to a 4-hydroxy-4,1-isopropoxydiphenyl sulfone developer dispersion used for a thermosensitive recording medium, a wet pulverization method, and a thermosensitive recording medium using the developer dispersion. .
- thermosensitive recording medium that records a color-developed image by using a colorless or pale-colored leuco dye and a phenol or an organic acid under heating has been widely put to practical use.
- Such a thermal recording medium is capable of forming a color image only by heating, making the recording apparatus relatively compact, easy to maintain, and generating no noise.
- information recording devices such as facsimile machines, computer output machines, label printers and other issuing machines, automatic ticket vending machines, CD-ATMs, order slip output machines for family restaurants, and data output machines for scientific research equipment, etc. Widely used as a material.
- thermosensitive recording material using 2,2-bis (4-hydroxyphenyl) propane (bisphenol A) or benzyl p-hydroxybenzoate, which has been conventionally used as a color developing agent, produces a color image at a high temperature.
- bisphenol A 2,2-bis (4-hydroxyphenyl) propane
- benzyl p-hydroxybenzoate which has been conventionally used as a color developing agent
- thermosensitive recording medium when such a thermosensitive recording medium is brought into contact with a plasticizer, oil, or the like, a phenomenon that an image is erased to an unreadable level is also recognized.
- a plasticizer, oil, or the like when such a thermosensitive recording medium is brought into contact with a plasticizer, oil, or the like, a phenomenon that an image is erased to an unreadable level is also recognized.
- white paper is colored and so-called background fogging occurs.
- leuco dyes, developers, sensitizers, and the like used in heat-sensitive recording materials are used in the form of particles by wet pulverization. In this case, there is a tendency for the miniaturization of particles to proceed.
- 4-hydroxy-4,1-isopropoxydiphenyl sulfone is micronized, crystal growth may occur during wet pulverization for micronization or during storage of the prepared dispersion. Crystal growth is likely to occur when 4-hydroxy-4'isopropoxydiphenyl sulfone is finely divided into fine particles of 1 ⁇ m or less.
- This crystal growth is due to the hydration phenomenon of 4-hydroxy-4,1-isopropoxydiphenylsulfone, and the grown crystal is considered to be a hydrate.
- the heat-sensitive recording medium manufactured using the dispersion containing the hydrate has a drawback of causing background staining.
- Patent Dispersion is prepared by blending bis (4-hydroxyphenyl) sulfone and its metal salt with a selected compound (see Patent Document 2), A dispersion may be prepared by mixing a specific amount of 4,4'-diisopropoxydiphenyl sulfone (see Patent Document 3), or a dispersion may be prepared by mixing a specific amount of a diphenyl sulfone derivative of a specific chemical formula. (See Patent Document 4).
- hydroxypropylcellulose may be added at the time of dispersion (see Patent Document 5), and at least one selected from the group consisting of methylcellulose and hydroxyethylmethylcellulose. It is known to compound a compound at the time of dispersion (see Patent Document 6) or to mix hydroxypropyl methylcellulose (see Patent Document 7). However, there has been a problem that the saturation density and sensitivity of the thermosensitive recording medium at the time of coloring are lowered, and that it takes a long time to disperse the particles to a target particle diameter, that is, the dispersion efficiency is lowered.
- thermosensitive recording medium is also known in which a thermoplastic substance is simultaneously wet-dispersed, and a dispersion obtained by using a sulfone group-modified polyvinyl alcohol as a dispersant during the dispersion is contained! / Puru (see Patent Document 8) ).
- the obtained heat-sensitive recording medium has particularly excellent recording sensitivity and is hard to cause background fogging.
- thermoplastics with melting points below 130 ° C such as 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane, 1,1,3-tris (2-methyl-4) -Hydroxy-5-tert-butylphenyl) butane and 1,3,5-tris (4tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid are used for the purpose of improving recording sensitivity.
- the preferred range for the amount of 4-hydroxy-4,1-isopropoxydiphenyl sulfone is as high as 30 to 200% by weight.
- sulfone group-modified polybutyl alcohol has an effect of suppressing the hydration phenomenon of 4-hydroxy-4,1-isopropoxydiphenylsulfone during wet pulverization. At present, it is planned.
- the thermal recording medium may be exposed to relatively high temperatures during storage, in a state where it is set in the device, or after printing, but it is necessary to avoid the occurrence of background fogging in such a case.
- background fogging the color density of a white background when the steel sheet is brought into contact with an iron plate at 70 ° C for 5 seconds is used. This is defined as static color development characteristics. It is desirable that this value be as low as possible.
- Patent document 1 JP-A-8-324126
- Patent Document 2 JP-A-2-76779
- Patent Document 3 JP-A-7-314902
- Patent Document 5 JP-A-5-162455
- Patent Document 6 JP-A-5-309951
- Patent Document 7 JP-A-1 237191
- Patent Document 8 JP-A-9-207440
- the present invention provides a novel hydration phenomenon, that is, a novel method for suppressing crystal growth, when preparing a dispersion by wet-pulverizing 4-hydroxy-4,1-isopropoxydiphenyl sulfone as a developer. It seeks to provide a method. Furthermore, it has a heat-sensitive recording layer using this dispersion, high whiteness, high sensitivity, reduced background fog, excellent static color development characteristics, and no abnormal coloration even at high temperatures. They want to provide the body. Means for solving the problem
- 1,1,3-tris (1,1,3-tris) was used as an anti-hydration agent in the wet grinding of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer.
- the present invention provides the following dispersion of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer, wet-crushing method of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer, And a heat-sensitive recording material using the dispersion.
- Item 1 4-Hydroxy-4,1-isopropoxydiphenyl sulfone developer
- 1,1,3-Tris (2-methyl-4-hydroxy-5-cyclohexylphenol) butane and 1,1,3-tris (2-methyl-4-hydroxy-5-) are added to 100 parts by mass of the developer.
- tert-Butylfur) butane power At least one selected compound is 0.02-25 parts by mass
- Item 10 The dispersion according to Item 1.
- 1,3,5-Tris (4 tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid was added in an amount of 0.02 to 25 parts by mass based on 100 parts by mass of the developer.
- Item 4 The above-mentioned anti-hydration agent is 0.05-10 parts by mass with respect to 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer.
- Item 4 The dispersion according to any one of Items 1-3.
- Item 5 4-Hydroxy-4,1-isopropoxydiphenylsulfone developer
- Item 14 The dispersion according to any one of Items 1-4, which is obtained (or obtained) by wet pulverization in the presence of water.
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose
- Item 5 The dispersion according to item 1 or 4, which is obtained (or obtained) by wet pulverization in the presence of Item 6: 4-Hydroxy-4,1-isopropoxydiphenyl sulfone developer,
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose, and
- Item 14 The dispersion according to any one of Items 14 to 14, which is obtained (or obtained) by wet pulverization in the presence of.
- Item 7 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer
- Hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxyethylcellulose and methylcellulose force At least one selected from the group is 0.2 to 15 parts by mass.
- Item 8 For 100 parts by mass of sulfone-modified polybutyl alcohol,
- Bis (4-hydroxyphenyl) sulfone and its metal salt strength based on 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenyl sulfone, the content of the selected compound is 0.02 parts by mass or less;
- Diphenyl sulfone derivative represented by the following general formula (1): The content of one or more selected compounds is 0.05 parts by mass or less, and
- Item 18 The dispersion according to any one of Items 1 to 8, wherein the content of 4,4′-diisopropoxydiphenyl sulfone is 0.01 part by mass or less. [Chemical 1]
- R 1 represents a hydrogen atom or an isopropyl group
- R 2 and R 3 each independently represent an isopropyl group
- n and m each represent 0, 1, or 2. However, n and m simultaneously represent 0 or 1. It is not.
- the content of bis (4-hydroxyphenyl) sulfone and its metal salt per 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone is 0.02 parts by mass or less.
- Diphenyl sulfone derivative represented by the general formula (1) One or more selected compounds are 0.05 parts by mass or less, and
- Item 18 The dispersion according to any one of Items 1 to 8, wherein the content of 4,4′-diisopropoxydiphenyl sulfone is less than 0.01 part by mass.
- the content of bis (4-hydroxyphenyl) sulfone and its metal salt is selected from the group consisting of 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenyl sulfone, and the content of the selected compound is 0.1%. Less than 02 parts by mass,
- Item 18 The dispersion according to any one of Items 1 to 18, wherein the content of 4,4′-diisopropoxydiphenyl sulfone is less than 0.01 part by mass.
- the hydration inhibitor is used in an amount of 0.02 to 25 parts by mass with respect to 100 parts by mass of the developer.
- Item 10 The wet grinding method according to Item 10, wherein the at least one compound is used in an amount of 0.02 to 25 parts by mass.
- Item 12 The hydration inhibitor
- Item 10 The wet grinding method according to Item 10.
- the said anti-hydration agent is used in 0.05-10 parts by mass with respect to 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer
- Item 13 The wet grinding method according to any one of Items 10 to 12.
- Item 14 4-Hydroxy-4,1-isopropoxydiphenyl sulfone developer
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose
- Item 14 The wet grinding method according to Item 10 or 13, comprising a step of performing wet grinding in the presence of.
- Item 15 4-Hydroxy-4,1-isopropoxydiphenyl sulfone developer,
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose, and
- Item 14 The wet grinding method according to any one of Items 10 to 13, which has a step of wet grinding in the presence of Law.
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose, and
- Item 14 The wet grinding method according to Item 10 or 13, comprising a step of performing wet grinding in the presence of.
- At least one selected from the group consisting of hydroxypropynolemethinoresenolerose, hydroxyethynolemethinoresenorelose, hydroxyethyl cellulose and methylcellulose is used in an amount of 0.2 to 15 parts by mass.
- Item 14 The wet grinding method according to Item 14 or 15.
- Item 17 For 100 parts by mass of sulfone-modified polybutyl alcohol,
- Hydroxypropynolemethinoresenolerose, hydroxyethynolemethinoresenolerose, hydroxyethylcellulose, and methylcellulose force At least one selected from the group is 2,000 to 2000 parts by mass.
- Item 15 The wet grinding method according to Item 15 or 16.
- R 1 represents a hydrogen atom or an isopropyl group
- R 2 and R 3 each independently represent an isopropyl group
- n and m each represent 0, 1, or 2. However, n and m simultaneously represent 0 or 1. It is not.
- the content of bis (4-hydroxyphenyl) sulfone and its metal salt strength which is 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone, is 0. .02 parts by mass or less
- the diphenyl sulfone derivative represented by the general formula (1) has a group strength of not less than 0.05 parts by mass of one or more selected compounds, and
- Item 10 The wet pulverization method according to Item 10-17, wherein the content of 4,4′-diisopropoxydiphenyl sulfone is less than 0.01 part by mass.
- the content of bis (4-hydroxyphenyl) sulfone and its metal salt strength which is a group compound selected from 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenyl sulfone, is 0. Less than 02 parts by mass,
- thermosensitive recording medium comprising a sheet-like substrate and a thermosensitive recording layer formed on at least one surface of the sheet-like substrate,
- the heat-sensitive recording layer is formed by applying a coating solution for a heat-sensitive recording layer containing a substantially colorless dye precursor and a developer to a sheet-like substrate and drying the heat-sensitive recording layer,
- the heat-sensitive recording layer coating liquid is
- thermosensitive recording material containing a 4-hydroxy-4,1-isopropoxydifluorosulfone developer dispersion in which the hydration inhibitor is 0.02 to 25 parts by mass with respect to 100 parts by mass of the developer.
- a thermosensitive recording medium comprising a sheet-like substrate and a thermosensitive recording layer formed on at least one surface of the sheet-like substrate,
- the heat-sensitive recording layer is formed by applying a coating solution for a heat-sensitive recording layer containing a substantially colorless dye precursor and a developer to a sheet-like substrate and drying the heat-sensitive recording layer,
- the heat-sensitive recording layer coating liquid is
- Item 21 The hydration inhibitor
- Item 22 The heat-sensitive recording material according to any one of Items 19 to 21.
- the developer dispersion liquid the developer dispersion liquid
- Item 19 A heat-sensitive recording material according to Item 19.
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose, and
- Item 20 The heat-sensitive recording material according to any one of Items 19 to 22.
- the developer dispersion liquid the developer dispersion liquid
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycellulose and methylcellulose, and
- Item 19 A heat-sensitive recording material according to Item 19.
- Hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxyethylcellulose and methylcellulose force At least one selected from the group is 0.2 to 15 parts by mass.
- thermosensitive recording material according to item 22 or 23.
- Item 25 For 100 parts by mass of sulfone-modified polybutyl alcohol,
- Item 25 The thermal recording medium according to Item 23 or 24.
- Item 27 The heat-sensitive recording material according to any one of Items 19 to 25, wherein the content of 4,4′-diisopropoxydiphenyl sulfone is 0.01 part by mass or less.
- R 1 represents a hydrogen atom or an isopropyl group
- IT and R ° each independently represent an isopropyl group
- n and m represent 0, 1, or 2, provided that n and m represent It cannot be 0 at the same time.
- thermosensitive recording medium comprising a sheet-shaped substrate and a thermosensitive coloring layer formed on at least one surface of the sheet-shaped substrate,
- the heat-sensitive coloring layer is formed by applying a coating solution for a heat-sensitive coloring layer containing a substantially colorless dye precursor and a developer to a sheet-like substrate, followed by drying,
- thermosensitive recording medium wherein the coating solution for a thermosensitive coloring layer comprises the 4-hydroxy-4,1-isopropoxydiphenylsulfone dispersion according to any one of Items 1 to 19.
- the present invention provides a novel method capable of suppressing the hydration phenomenon, that is, crystal growth, when a dispersion is prepared by formula pulverization.
- the present invention provides a novel method capable of suppressing the hydration phenomenon, that is, crystal growth, even when 4-hydroxy-4,1-isopropoxydiphenylsulfone, which is a color developer, has high purity. To provide.
- 4-hydroxy-4′-isopropoxydiphenyl sulfone which is a developer that does not cause hydration, can be finely pulverized to an average particle size of 2 ⁇ m or less by wet pulverization.
- thermosensitive recording medium can be manufactured.
- the present invention provides a 4-hydroxy-4,1-isopropoxydiphenylsulfone developer
- a group consisting of 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane and 1,1,3-tris (2-methyl-4-hydroxy-5-tertbutylphenyl) butane At least one compound, or
- the 4-hydroxy-4 ′ isopropoxydiphenyl sulfone developer used in the present invention is preferably of high purity.
- R 1 represents a hydrogen atom or an isopropyl group
- IT and R ° each independently represent an isopropyl group
- n and m represent 0, 1, or 2, provided that n and m are It cannot be 0 at the same time.
- the content of the selected compound is 0.02 parts by mass or less, preferably less than 0.02 parts by mass, and further less than 0.01 parts by mass. , Especially substantially 0 (below the detection limit),
- the diphenyl sulfone derivative represented by the above general formula (1) has a group strength of at least one selected from one or more compounds, and the content of the compound is 0.05 parts by mass or less, preferably less than 0.03 parts by mass, and Less than 0.01 parts by mass, especially substantially 0 (below the detection limit),
- the content of 4,4′-diisopropoxydiphenyl sulfone is 0.01 part by mass or less, preferably less than 0.01 part by mass, further less than 0.002 part by mass, particularly substantially 0 (detection limit or less) It is preferable that
- 4-hydroxy-4,1-isopropoxydiphenylsulfone developer is wet-pulverized in the presence of a hydration inhibitor to prepare a dispersion.
- the hydration of 4 'isopropoxydiphenyl sulfone is prevented.
- the hydration inhibitor is the compound of (i) (first embodiment) and the case of being the compound of (ii) (second embodiment) will be specifically described.
- a first aspect of the present invention provides a 4-hydroxy-4,1-isopropoxydiphenyl sulfone developer
- the amount is 0.02 to 25 parts by mass per 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer.
- the addition amount is 0.02 parts by mass or more, the effect of suppressing hydrate formation increases.
- the amount is less than 25 parts by mass, there is little concern that the sensitivity of the thermal recording medium is reduced!
- a water-soluble polymer for efficient dispersion.
- water-soluble polymer examples include methylcellulose, carboxymethylcellulose, hydroxyethynoresenorelose, hydroxyethynolemethinoresenorelose, hydroxypropynolecellulose, hydroxypropylmethylcellulose, starch and derivatives thereof, fully saponified or partially Examples include saponified polybutyl alcohol, carboxy-modified polybutyl alcohol, sulfone-modified polybutyl alcohol, polyacrylamide, and the like.
- the amount of the water-soluble polymer to be added is about 0.1 to 20 parts by mass, preferably about 0.2 to 20 parts by mass, based on 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer. Degrees. At least one selected from the group consisting of schitylcellulose and methylcellulose In the first embodiment of the present invention, in order to further improve the effect of preventing the hydration phenomenon, it is selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethylenomethinoresenolerose, hydroxyethylcellulose and methylcellulose. It is preferable to use at least one kind of dispersed binder.
- a substance that functions as both a dispersant and a binder is referred to as a “dispersion binder”.
- a 4-hydroxy-4,1-isopropoxydiphenylsulfone developer is provided,
- (B) 4-hydroxy-4 ′ comprising a step of wet-grinding in the presence of at least one selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethynolemethinoresenolerose, hydroxyethyl cellulose and methylcellulose.
- Wet milling of isopropoxydiphenyl sulfone developer is included.
- the ratio of the dispersing binder is preferably about 0.2 to 15 parts by mass with respect to 100 parts by mass of the 4-hydroxy-4,1-isopropoxydiphenol sulfone developer. More preferred, is about.
- the addition amount is 0.2 parts by mass or more, the effect of suppressing hydrate formation is increased. If the amount is less than 15 parts by mass, there is little concern that the sensitivity of the thermosensitive recording medium is reduced!
- the first aspect of the present invention provides:
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycetyl cellulose and methylcellulose, and
- (B) at least one selected from the group consisting of hydroxypropynolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxyethyl cellulose and methylcellulose, and
- the amount of at least one compound selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethynolemethinoresenorelose, hydroxyethylcellulose and methylcellulose is 2 to 2000 parts by mass, particularly 20 to 1000 parts by mass. Preferably, there is. If it is at least 2 parts by mass, the effect of suppressing hydrate formation will be high. If the amount is less than 2,000 parts by mass, there is little fear that the sensitivity of the thermosensitive recording medium having a good dispersion efficiency is lowered.
- the dispersion is prepared by adding 4-hydroxy-4 ′ isopropoxydifluorosulfone developer in a predetermined amount in an aqueous medium.
- the dispersion is a mixture of:
- compositions further containing a water-soluble polymer are prepared, and the composition may be prepared by wet pulverization.
- 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane and 1,1,3-tris (2-methyl-4-hydroxy-5-tertbutylbutyl) butaneca Preparing a composition in which at least one selected compound is dispersed in a dispersing binder,
- the composition may contain 4-hydroxy-4,1-isopropoxydiphenyl sulfone developer, preferably May be further prepared by adding a sulfone-modified polyvinyl alcohol and z or another water-soluble polymer and then wet-pulverizing.
- a pulverizer such as a ball mill and a sand grinder is used for the wet pulverization.
- wet milling is carried out until the average particle size of 4-hydroxy-4,1-isopropoxydiphenylsulfone in the dispersion after wet milling is about 0.2-, especially about 0.5-1.8 m. Is preferred.
- thermosensitive recording medium If it is 0.2 m or more, the effect of suppressing hydrate formation is high, while if it is 2 m or less, the sensitivity of the thermosensitive recording medium is less likely to decrease.
- the average particle diameter is a 50% average particle diameter measured by a Shimadzu laser diffraction particle size distribution analyzer (product name: SALD-2000).
- auxiliaries such as surfactants, defoamers and preservatives may be blended.
- 4-hydroxy-4,1-isopropoxydiphenylsulfone developer provided with a step of wet grinding in the presence of 1,3,5-tris (4tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid Including wet grinding methods.
- 1,3,5-Tris (4tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid is present.
- the amount of 1,3,5-tris (4tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid is present.
- the amount is 0.02 to 25 parts by mass per 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer.
- the addition amount is 0.02 parts by mass or more, the effect of suppressing hydrate formation increases.
- the amount is less than 25 parts by weight, there is little concern that the sensitivity of the thermal recording medium is reduced!
- water-soluble polymer examples include methylcellulose, carboxymethylcellulose, hydroxyethynoresenorelose, hydroxyethynolemethinoresenorelose, hydroxypropynolecellulose, hydroxypropylmethylcellulose, starch and derivatives thereof, fully saponified or partially Examples include saponified polybutyl alcohol, carboxy-modified polybutyl alcohol, sulfone-modified polybutyl alcohol, polyacrylamide, and the like.
- the amount of the water-soluble polymer to be added is about 0.1 to 20 parts by mass, preferably about 0.2 to 20 parts by mass, based on 100 parts by mass of 4-hydroxy-4,1-isopropoxydiphenylsulfone developer. Degrees. At least one member selected from the group consisting of shetyl cellulose and methyl cellulose In the second embodiment of the present invention, in order to further improve the effect of preventing hydration,
- At least one kind of dispersing binder selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethylinomethinoresenorelose, hydroxyethylcellulose and methylcellulose.
- dispersing binder selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethylinomethinoresenorelose, hydroxyethylcellulose and methylcellulose.
- (B) 4-hydroxy-4 ′ comprising a step of wet-grinding in the presence of at least one selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethynolemethinoresenolerose, hydroxyethyl cellulose and methylcellulose.
- Wet milling of isopropoxydiphenyl sulfone developer is included.
- the effect of preventing the hydration of 4-hydroxy-4'-isopropoxydifluorosulfone is further improved by obtaining a developer dispersion in the presence of a dispersing compound.
- the proportion of the dispersing binder is preferably 0.2 to 15 parts by mass with respect to 100 parts by mass of the 4-hydroxy-4,1-isopropoxydiphenylsulfone developer, and 0.3 to 5 parts by mass. Is more preferable! / ,.
- the addition amount is 0.2 parts by mass or more, the effect of suppressing hydrate formation is increased. If the amount is less than 15 parts by mass, there is little concern that the sensitivity of the thermosensitive recording medium is reduced!
- thermosensitive recording medium it is preferable to further use a sulfone-modified polybutyl alcohol in order to further improve the dispersion efficiency and obtain a more sensitive thermosensitive recording medium.
- (B) at least one selected from the group consisting of hydroxypropinolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxycetyl cellulose and methylcellulose, and
- (B) at least one selected from the group consisting of hydroxypropynolemethinoresenolellose, hydroxyethynolemethinoresenolellose, hydroxyethyl cellulose and methylcellulose, and
- thermosensitive recording medium with higher sensitivity can be obtained.
- the dispersing binder and the sulfone-modified polybutyl alcohol in combination, the formation of 4-hydroxy-4,1-isopropoxydiphenyl sulfone hydrate is further suppressed, and the dispersion is more efficiently performed to a fine particle diameter. It becomes possible.
- the amount of at least one compound selected from the group consisting of hydroxypropinolemethinoresenolerose, hydroxyethynolemethinoresenorelose, hydroxyethylcellulose and methylcellulose is 2 to 2000 parts by mass, particularly 20 to 1000 parts by mass. Preferably, there is.
- thermosensitive recording medium having good dispersion efficiency If it is at least 2 parts by mass, the effect of suppressing hydrate formation will be high. If the amount is less than 2,000 parts by mass, there is little fear that the sensitivity of the thermosensitive recording medium having good dispersion efficiency is lowered.
- the dispersion is obtained by adding 4-hydroxy-4 ′ isopropoxydifluorosulfone developer in a predetermined amount in an aqueous medium.
- the dispersion is a mixture of:
- compositions further containing a water-soluble polymer are prepared, and the composition is prepared by wet pulverization.
- the composition may be prepared by adding a 4-hydroxy-4,1-isopropoxydiphenyl sulfone developer, preferably a sulfone-modified polyvinyl alcohol and Z or another water-soluble polymer, followed by wet pulverization. .
- a pulverizer such as a ball mill and a sand grinder is used for the wet pulverization.
- the average particle size of 4-hydroxy-4,1-isopropoxydiphenyl sulfone in the dispersion after the wet grinding is about 0.2-, particularly about 0.5-1.8 m. It is preferable to carry out up to.
- thermosensitive recording medium If it is 0.2 m or more, the effect of suppressing hydrate formation is high, while if it is 2 m or less, the sensitivity of the thermosensitive recording medium is less likely to decrease.
- the average particle size is a 50% average particle size measured by a Shimadzu laser diffraction particle size distribution analyzer (product name: SALD-2000).
- auxiliary agents such as surfactants, defoamers and preservatives may be blended.
- the 4-hydroxyl of the present invention is used as a developer.
- C 4,1-Isopropoxydiphenyl sulfone developer dispersion that is, 4-hydroxy-4'-isopropoxydiphenyl sulfone developer obtained by wet grinding into fine particles in the presence of a hydration inhibitor Use liquid.
- the heat-sensitive recording medium of the present invention can be manufactured by applying a heat-sensitive recording layer coating solution on at least one surface of a sheet-like substrate and drying the same to form a heat-sensitive recording layer.
- thermosensitive recording medium of the present invention is a thermosensitive recording medium including a sheet-like substrate and a thermosensitive recording layer formed on at least one surface of the sheet-like substrate.
- the heat-sensitive recording layer is formed by applying a coating solution for a heat-sensitive recording layer containing a substantially colorless dye precursor and a developer to a sheet-like substrate and drying the heat-sensitive recording layer,
- the heat-sensitive recording layer coating solution includes a heat-sensitive recording material containing the above 4-hydroxy-4,1-isopropoxydiphenyl sulfone developer dispersion of the present invention.
- the coating solution for the heat-sensitive recording layer is prepared by blending a dyeing precursor, a color developer, a binder, and, if necessary, various auxiliaries such as a sensitizer, a preservability improver, and a pigment.
- a leuco dye can be used, and it can be selected from conventionally known ones such as triphenylmethane-based, fluoran-based, and diphenylmethane-based compounds.
- examples of the dye precursor include, for example, 3- (4-ethylethyl-2-ethoxyphenyl) -3- (1-ethyl-2-methylindole-3-yl) 4azaphthalide, crystal bioreactlactone, 3- (N —Ethyl-N isopentylamino) — 6-Methyl-7- ⁇ -rinofluoran, 3-Getylamino-6-methyl-7-anilinofluoran, 3-Getylamino-6-methyl-7- (o, ⁇ -dimethyla-lino) fluoran , 3- (N-ethyl-N-p-toluidino) -6-methyl-7-anilinofluoran, 3-pyrrolidino 6-methyl-7-anilinofluoran, 3-dibutylamino-6-methyl-7-ani Linofluoran, 3- (N-cyclohexyl N-methylamino) -6-methyl-7-alpha-linoffluoran,
- the content of the dye precursor in the heat-sensitive recording layer is generally about 5 to 50% by mass, particularly about 8 to 30% by mass.
- the developer may be used in combination with a developer other than the developer dispersion liquid of the present invention as long as the effect of the present invention is not impaired.
- Examples of such other developers are 4,4,1-isopropylidenediphenol, 4,4,1-cyclohexylidenediphenol, 2,2-bis (4-hydroxyphenyl) 4-methylpentane 2,4'-dihydroxydiphenylsulfone, 4,4'dihydroxydiphenylsulfone, 3,3'-diaryl4,4'dihydroxydiphenylsulfone, 4-hydroxy-4'-methyldiphenylenolesnorefone, 1,1 Phenolic compounds such as -bis (4-hydroxyphenyl) -1-phenyl-ethane and 1,4-bis [a-methyl- ⁇ - (4-hydroxyphenyl) ethyl] benzene; ⁇ - ⁇ -tolylsulfol- ⁇ , 1-phenylurea, 4,4,1-bis [(4-methyl-3-phenoxycarbo-laminophenol) ureido] diphenylmethane, ⁇ - ⁇ -tolylsulfurol
- the content of the color developer in the heat-sensitive recording layer is generally 5 to 60% by mass, and particularly about 10 to 50% by mass of the color developer of the present invention and the other color developer that does not impair the effects of the present invention. It is.
- binder examples include polyvinyl alcohol having various molecular weights, starch and derivatives thereof, cellulose derivatives such as methoxycellulose, carboxymethylcellulose, methylcellulose, and ethylcellulose, sodium polyacrylate, polybutylpyrrolidone, and acrylic.
- Water-soluble polymer materials poly (vinyl acetate), polyurethane, styrene-z-butadiene copolymer, polyacrylic acid, polyacrylic acid ester, sodium chloride Z-butyl acetate copolymer, polybutyl methacrylate, ethylene Z vinegar Latexes of hydrophobic polymers such as acid butyl copolymers and styrene-Z-butadiene-Azaryl copolymers can be mentioned.
- the content of the binder in the heat-sensitive recording layer is preferably 5 to 40% by mass, particularly preferably about 8 to 30% by mass.
- a heat-fusible substance (a so-called sensitizer) can be blended in the heat-sensitive recording layer within a range not to impair the desired effect.
- sensitizers include stearic acid amide, stearic acid methylene bisamide, stearic acid ethylene bisamide, 4-benzyldiphenyl, p-tolylbiphenyl ether, di ( ⁇ -methoxyphenoxethyl) ether, 2-di (3-methylphenoxy) ethane, 1,2-di (4-methylphenoxy) ethane, 1,2-di (4-methoxyphenoxy) ethane, 1,2-di (4 ) Ethane, 1,2-diphenoxetane, 1- (4-methoxyphenoxy) -2- (3-methylphenoxy) ethane, 2-naphthylbenzyl ether, 1- (2-naphthyloxy) -2-phenoxetane, 1 , 3-Di (naphthyloxy) propane, dibenzyl oxalate, di-p-methyl-benzyl oxalate, di-p-chlorobenz
- the content of the sensitizer in the heat-sensitive recording layer is preferably 3 to 40% by mass, particularly preferably about 5 to 30% by mass.
- a storage stability improving agent can be contained.
- the strong preservative improver include, for example, 2,2′-ethylidenebis (4,6-ditertbutylphenol), 4,4, -thiobis (2-methyl-6tertbutylphenol), 4,4 4, butylidenebis (6-tert-butyl-3-methylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-tertbutylbutyl) butane, 1,1,3-tris (2-methyl-4-) Hydroxy-5-cyclohexylphenyl) butane, 2,2'-methylenebis (4-ethyl-6 tert-butylbutylphenol), 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2, Hindered phenols such as 4-di-tert-butyl-3-methylphenol, 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl
- auxiliaries examples include waxes, organic or inorganic white pigments, and the like.
- waxes such as paraffin, amide wax, bisimide wax, and metal salts of higher fatty acids can be used.
- organic or inorganic white pigments examples include calcium carbonate, silica, zinc oxide, titanium oxide, aluminum hydroxide, zinc hydroxide, barium sulfate, clay, calcined clay, talc, and surface-treated calcium carbonate and the like.
- Inorganic fine powders such as silica, and organic fine powders such as urine formalin resin, styrene z methacrylic acid copolymer, and polystyrene resin can be used.
- the content of the wax in the heat-sensitive recording layer is preferably about 11 to 20% by mass, particularly preferably about 3 to 10% by mass.
- the content of the white pigment in the heat-sensitive recording layer is preferably 5 to 60% by mass, particularly preferably about 10 to 40% by mass.
- the support used in the thermal recording medium of the present invention may be paper, coated paper having a surface coated with a pigment, latex, or the like, synthetic paper having a multilayer structure made of polyolefin resin, plastic film, or a film of any of these. Power such as composite sheet can be selected.
- a coating containing the mixture of the above-mentioned required components is provided on at least one surface of such a sheet-like support.
- a cloth liquid is applied and dried to form a heat-sensitive recording layer, thereby producing a heat-sensitive recording medium.
- the coating amount is more preferably that the mass after drying is 1 one 15GZm 2 is preferred instrument 2- 10g / m 2.
- an undercoat layer may be provided between the support and the heat-sensitive recording layer.
- the undercoat layer is formed by applying a coating liquid for an undercoat layer containing a pigment and a binder on a support and drying.
- Examples of the pigment include the ability to use various pigments.
- inorganic pigments such as calcined clay and organic pigments can be exemplified.
- binder binders used for the heat-sensitive recording layer, in particular, starch, styrene-butadiene copolymer, and the like can be used.
- the amount of the binder to be used can be selected from a wide range, but it is generally preferable to use the binder in an amount of about 5 to 500% by mass, particularly about 10 to 100% by mass, based on the total solid content of the pigment. .
- the coating amount of the undercoat layer is 1 one 30GZm 2 about the mass after drying, preferably 5-20GZm
- it is about 2 .
- a protective layer may be provided on the thermal recording layer in order to enhance the oil resistance and the plasticizer resistance of the color image.
- the heat-sensitive recording material thus obtained provides an excellent color image, has high whiteness and high sensitivity, is less susceptible to background fog at high temperatures, and has excellent static color development characteristics and is excellent at high temperatures. Does not show abnormal coloring.
- parts represents “parts by mass” and “%” represents “% by mass”.
- Average particle size is the 50% average particle size measured with a Shimadzu laser diffraction particle size distribution analyzer (trade name: SALD-2000).
- the purity level of 4-hydroxy 4,1-isopropoxydiphenyl sulfone (trade name: ALD-2000, manufactured by AOLUN DA, China, Lot No. 050103) used in the following Examples, Reference Examples and Comparative Examples was determined by HPLC.
- the amount of bis (4-hydroxyphenyl) sulfone and its metal salt was 0.017% of that of 4-hydroxy-4,1-isopropoxydiphenylsulfone, represented by the general formula (1).
- Diphenylsulfone derivative The amount of one or more selected compounds was 0.03%, and the amount of 4,4′-diisopropoxydiphenylsulfone was less than 0.002%.
- 4-hydroxy-4,1-isopropoxydiphenyl sulfone (trade name: ALD-2000, manufactured by AOLUNDA, China, Lot No. 050103) 20 parts, 1,1,3-tris (2-methyl-4-hydroxy-5)
- a composition consisting of 0.2 parts of cyclohexylphenyl) butane, 20 parts of an aqueous solution of 10% fully saponified polybutyl alcohol (trade name: PVA105, made of Kuraray clay) and 70.8 parts of water was manufactured by IMETTAS. Notch dispersion was performed for 3 hours using a sand grinder to obtain a dispersion having an average particle size of 1 m. No crystal growth occurred when this dispersion was left for 3 days.
- Example I-2 Preparation of Dispersion Solution BI-2
- 1,1,3-tris (2-methyl-4) was used instead of 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane.
- a dispersion having an average particle diameter of m was obtained in the same manner as in Example 1 except that -hydroxy-5 tert-butylphenyl) butane was used. Even if this dispersion was left for 3 days, crystal growth did not occur.
- Example I Example 1 was repeated except that the amount of 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane was changed to 0.01 part in the preparation of BI-1. Example I 1 and Similarly, a dispersion having an average particle size of 1 m was obtained. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- Example I Example 1 was repeated except that the amount of 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane was changed to 4.0 parts in the preparation of BI-1. In the same manner as in Example I1, a dispersion having an average particle size of 1 m was obtained. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- Example I Except that the amount of 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane was changed to 0.002 part in the preparation of B-1 in Example I1. In the same manner as in I1, a dispersion having an average particle size of 1 m was obtained. When this dispersion was left for 3 days, the average particle size became 1. and crystal growth slightly occurred.
- Example T-7 Preparation of dispersion BT-7
- Example I In the preparation of BI-1 of Example I 1, 5% hydroxypropyl methylcellulose (trade name: Metroose 60S H03, Shin-Etsu Iridaku) instead of 20 parts of 10% fully saponified polybutyl alcohol aqueous solution Using 4 parts of an aqueous solution (manufactured by Kogyo Co., Ltd.) and 18 parts of an aqueous solution of 10% sulfone-modified polybutyl alcohol (trade name: Goselan L-3266, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) and reducing the amount of water by 68.8 A dispersion having an average particle size of 0.8 ⁇ m was obtained in the same manner as in Example I1, except that the composition was changed to parts. Even if this dispersion was left for 3 days, crystal growth did not occur.
- aqueous solution manufactured by Kogyo Co., Ltd.
- Goselan L-3266 manufactured by Nippon Synthetic Chemical Industry Co., Ltd
- Example I-8 Preparation of Dispersion Solution BI-8
- Example I 1 In the preparation of BI-1 of Example I 1, 5% methylcellulose (trade name: Metrolose SM-15, Shin-Etsu Chemical Co., Ltd.) was used instead of 20 parts of 10% fully saponified polybutyl alcohol aqueous solution. 4 parts of an aqueous solution and 18 parts of a 10% aqueous solution of completely saponified polyvinyl alcohol. A dispersion having an average particle size of 1 m was obtained in the same manner as in Example I1, except that the amount of water used was changed to 68.8 parts. No crystal growth occurred when this dispersion was left for 3 days.
- 5% methylcellulose trade name: Metrolose SM-15, Shin-Etsu Chemical Co., Ltd.
- Example I1 In the preparation of BI-1 of Example I1, instead of 20 parts of 10% of completely saponified polybutyl alcohol aqueous solution, 5% of hydroxypropyl methylcellulose (trade name: Metroose 60 SH03, Shinetsu Iridani) 38 parts of aqueous solution and 1 part of aqueous solution of 10% sulfone-modified polyvinyl alcohol (trade name: Goselan L-3266, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), and the amount of water was reduced to 51.8 parts. A dispersion having an average particle size of 1 m was obtained in the same manner as in Example I1 except that the dispersion time was changed to 2 hours. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- hydroxypropyl methylcellulose trade name: Metroose 60 SH03, Shinetsu Iridani
- Example I1 4-hydroxy-4,1-isopropoxydiphenyl-sulfone (trade name: ALD-2000, manufactured by AOLUNDA, China, Lot No. 050103) was used and purified. In the same manner as in Example 1, a dispersion having an average particle size of: Lm was obtained.
- the purity level after purification was analyzed by HPLC, where the amount of bis (4-hydroxyphenyl) sulfone and its metal salt was 0.006% of that of 4-hydroxy-4,1-isopropoxydiphenylsulfone, and the general formula Difluorosulfone derivative power represented by (1)
- the amount of one or more selected compounds (B) is 0.008%, and that of 4,4 'diisopropoxydiphenyl sulfone (C) The amount was less than 0.002%. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- Calcined clay (trade name: Ansilex, made of Engelnodene earth) 85 parts of a dispersion obtained by dispersing in 320 parts of water, 40 parts of styrene-butadiene copolymer emulsion (50% solid content) and 10 parts
- An undercoat layer coating liquid was prepared by mixing 50 parts of an aqueous solution of acid starch and starch.
- Preparation of dye precursor dispersion AI 3- (N-ethyl-N-isopentylamino) -6-methyl-7-arinofluoran 10 parts, a 10% aqueous solution of polybutyl alcohol 10 parts and water 35 parts were prepared using an IMETTAS sand grinder. A dispersion having an average particle size of 0.8 m was obtained.
- a dispersion having an average particle diameter of 1 m was obtained from a composition comprising 20 parts of di-p-methyl-benzyl oxalate, 20 parts of a 10% aqueous solution of polybutyl alcohol and 70 parts of water using a sand grinder manufactured by IMETTAS Corporation.
- thermosensitive recording layer Of coating solution for thermosensitive recording layer
- a dispersion liquid prepared and left for 3 days was used as the BI-1 liquid.
- the coating amount after drying was dried undercoat layer coating solution so as to 7.
- OgZm 2 further coating amount after drying on the undercoat layer 5.
- OgZm 2 and The coating solution for the heat-sensitive recording layer was applied and dried to obtain a heat-sensitive recording material having a surface with an Oken-type smoothness of 600 to 1000 seconds.
- Example G10 in preparation of the coating solution for the heat-sensitive recording layer, the m-i solution was changed to the m-5 solution,
- thermosensitive recording medium was prepared in the same manner as in Example 10 except that the amount of BI-5 solution was changed to 140 parts and the amount of calcium carbonate was changed to 18 parts.
- BI-5 solution a dispersion prepared and left for 3 days was used.
- Example 1-10 a heat-sensitive recording material was prepared in the same manner as in Example 10 except that the BI-1 solution was changed to the BI-7 solution in the preparation of the coating solution for the heat-sensitive recording layer.
- the BI-7 solution a dispersion prepared and left for 3 days was used.
- Example 1-10 the BI-1 solution was changed to the BI-9 solution in the preparation of the coating solution for the heat-sensitive recording layer.
- a heat-sensitive recording material was prepared in the same manner as in Example 10 except for the above.
- As the BI-9 solution a dispersion prepared and left for 3 days was used.
- Example I1 In the preparation of BI-1 of Example I1, in the same manner as in Example I1, except that 1,1,3-tris (2-methyl-4-hydroxy-5-cyclohexylphenyl) butane was not used, A dispersion having an average particle size of 1 m was obtained. When this dispersion was allowed to stand for 3 days, crystal growth occurred, and the average particle size became 3 ⁇ m.
- Example I In the preparation of the thermosensitive recording layer coating liquid of Example 10, the same procedure as in Example 1-10 was carried out except that the developer dispersion BI-1 was used instead of the developer dispersion BI-1. A thermosensitive recording medium was obtained. The BI-10 solution used was a dispersion prepared and left for 3 days.
- the heat-sensitive recording medium was treated at 60 ° C. for 1 hour, and the density at this time was measured in a visual mode using a Macbeth densitometer (trade name: RD-914, manufactured by Macbeth).
- the sample was heated at a temperature of 70 ° C. and a pressure of 9.8 ⁇ 10 4 Pa for 5 seconds.
- the color density at this time was measured in the visual mode of a Macbeth densitometer (trade name: RD-914, manufactured by Macbeth).
- Thermal evaluation machine (trade name: TH-PMD, bulimia Electric Co., Ltd.) each heat-sensitive at 0. 24miZd 0 t using the The recording medium was colored, and the density of the recording portion was measured in a visual mode of a Macbeth densitometer (trade name: RD-914, manufactured by Macbeth).
- Example II-1 of Example II In the preparation of II-1 of Example II 1, instead of 18 parts of a 10% aqueous solution of sulfone-modified polybutyl alcohol and 2 parts of a 10% aqueous solution of hydroxypropylmethylcellulose, 10% of a sulfone-modified polybutyl alcohol was used. A dispersion having an average particle diameter of m was obtained in the same manner as in Example 1 except that 20 parts of an aqueous solution (trade name: Gohselan L 3266, manufactured by Nippon Kasei Chemical Co., Ltd.) was used. Even if this dispersion was left for 3 days, crystal growth did not occur.
- an aqueous solution trade name: Gohselan L 3266, manufactured by Nippon Kasei Chemical Co., Ltd.
- Example II-1 In the preparation of II-1 in Example II-1, the amount of 1,3,5-tris (4 tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid was changed to 0.01 part. Other than the above, a dispersion having an average particle size of 1 ⁇ m was obtained in the same manner as in Example III-1. Release this dispersion for 3 days Even if it was placed, the crystal growth did not occur.
- Example II-1 In the preparation of III-1 in Example II-1, the amount of 1,3,5-tris (4tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid was changed to 4.0 parts. Other than the above, a dispersion having an average particle size of 1 ⁇ m was obtained in the same manner as in Example III-1. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- Participant example II 5 Preparation of developer dispersion BII-5
- Example II-1 In the preparation of II-1 in Example II-1, the blending amount of 1,3,5-tris (4tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid was changed to 6.0 parts. Other than the above, a dispersion having an average particle size of 1 ⁇ m was obtained in the same manner as in Example III-1. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- Example II-1 In the preparation of II-1 in Example II-1, the amount of 1,3,5-tris (4 tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanuric acid was changed to 0.002 part. Except for the above, a dispersion having an average particle size of 1 ⁇ m was obtained in the same manner as in Example III-1. When this dispersion was allowed to stand for 3 days, the average particle size became 1. and slight crystal growth occurred.
- Example II-1 Except that in the preparation of II-1 in Example II-1, 4-hydroxy-4,1-isopropoxydiphenyl sulfone (trade name: ALD-2000, manufactured by AOLUNDA, China, Lot No. 050103) was also used by force. In the same manner as in Example III-1, a dispersion having an average particle size of: m was obtained.
- ALD-2000 manufactured by AOLUNDA, China, Lot No. 050103
- the purity level after purification was analyzed by HPLC, where the amount of bis (4-hydroxyphenyl) sulfone and its metal salt was 0.006% of that of 4-hydroxy-4,1-isopropoxydiphenylsulfone, and the general formula Difluorosulfone derivative power represented by (1)
- the amount of one or more selected compounds (B) is 0.008%, and that of 4,4 'diisopropoxydiphenyl sulfone (C) The amount was less than 0.002%. Even if this dispersion was allowed to stand for 3 days, crystal growth did not occur.
- Example II 7 Preparation of thermal recording medium • Preparation of coating liquid for undercoat layer
- Calcined clay (trade name: Ansilex, made of Engelnodene earth) 85 parts of a dispersion obtained by dispersing in 320 parts of water, 40 parts of styrene-butadiene copolymer emulsion (solid content 50%) and 10 parts of 10%
- An undercoat layer coating liquid was prepared by mixing 50 parts of an aqueous solution of acid starch and starch.
- a composition comprising 20 parts of di-p-methyl-benzyl oxalate, 20 parts of a 10% aqueous solution of polybutyl alcohol and 70 parts of water was used to obtain a dispersion having an average particle size of 1 m using an IMETTAS sand grinder. .
- thermosensitive recording layer Of coating solution for thermosensitive recording layer
- the coating amount after drying was dried undercoat layer coating solution so as to 7.
- OgZm 2 further coating amount after drying on the undercoat layer 5.
- OgZm 2 and The coating solution for the heat-sensitive recording layer was applied and dried so as to obtain a heat-sensitive recording material having a surface smoothness of 600 to 1000 seconds.
- Example II-7 a heat-sensitive recording material was prepared in the same manner as in Example II-7, except that in the preparation of the coating solution for the heat-sensitive recording layer, the first liquid was changed to the second liquid. In addition, the dispersion liquid used was prepared and left to stand for 3 days.
- Example II 7 in the preparation of the coating solution for the heat-sensitive recording layer, the ⁇ -1 solution was changed to the 5-5 solution. Except for the above, a thermosensitive recording medium was prepared in the same manner as in Example I-7. Note that the dispersion liquid used was prepared and left to stand for 3 days.
- Example II-1 As in Example II-1, except that 1,3,5-tris (4tert-butyl-3-hydroxy2,6-dimethylbenzyl) isocyanuric acid was not used in the preparation of II-1 in Example II-1 Thus, a dispersion having an average particle size of 1 m was obtained. When this dispersion was allowed to stand for 3 days, crystal growth occurred, and the average particle size became 3 ⁇ m.
- Example II-7 In preparing the coating solution for the heat-sensitive recording layer of Example II-7, the procedure of Example II-7 was repeated except that the developer dispersion liquid ⁇ -1 was used instead of the developer dispersion ⁇ -1. Thus, a thermosensitive recording medium was obtained. In addition, the dispersion liquid prepared and allowed to stand for 3 days was used as liquid ⁇ -7.
- the heat-sensitive recording medium was treated at 60 ° C for 1 hour! /, And the background density was measured in a visual mode using a Macbeth densitometer (trade name: RD-914, manufactured by Macbeth).
- the sample was heated at a temperature of 70 ° C. and a pressure of 9.8 ⁇ 10 4 Pa for 5 seconds.
- the color density at this time was measured in the visual mode of a Macbeth densitometer (trade name: RD-914, manufactured by Macbeth).
- Thermal evaluation machine (trade name: TH-PMD, bulimia Electric Co., Ltd.) each heat-sensitive at 0. 24miZd 0 t using the The recording medium was colored, and the density of the recording area was measured using a Macbeth densitometer (trade name: RD-914, manufactured by Macbeth) in visual mode.
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020067017937A KR101117217B1 (ko) | 2004-03-15 | 2005-03-15 | 4-히드록시-4'-이소프로폭시디페닐 술폰 현색제의 분산액,습식 분쇄 방법, 및 감열 기록체 |
DE602005010671T DE602005010671D1 (de) | 2004-03-15 | 2005-03-15 | 4-hydroxy-4' -isopropoxydiphenyl -sulfon-entwicklerdispersion, verfahren zum nassschleifen und thermoaufzeichnungsmedien |
EP05720792A EP1726450B1 (en) | 2004-03-15 | 2005-03-15 | 4-hydroxy-4' -isopropoxydiphenyl sulfone developer dispersion, method of wet grinding, and thermal recording media |
BRPI0508819-4A BRPI0508819B1 (pt) | 2004-03-15 | 2005-03-15 | dispersço reveladora de 4-hidràxi-4'-isopropàxi-difenilsulfona, mÉtodo de moagem émida e material de registro sensÍvel ao calor. |
JP2006511035A JP4591445B2 (ja) | 2004-03-15 | 2005-03-15 | 4−ヒドロキシ−4’−イソプロポキシジフェニルスルホン顕色剤の分散液、湿式粉砕方法および感熱記録体 |
US10/592,687 US7674748B2 (en) | 2004-03-15 | 2005-03-15 | 4-hydroxy-4′-isopropoxydiphenyl sulfone developer dispersion, method of wet grinding, and thermal recording media |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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JP2004072352 | 2004-03-15 | ||
JP2004-072352 | 2004-03-15 | ||
JP2004-166693 | 2004-06-04 | ||
JP2004166693 | 2004-06-04 | ||
JP2004251812 | 2004-08-31 | ||
JP2004-251812 | 2004-08-31 |
Publications (1)
Publication Number | Publication Date |
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WO2005087502A1 true WO2005087502A1 (ja) | 2005-09-22 |
Family
ID=34975430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/004535 WO2005087502A1 (ja) | 2004-03-15 | 2005-03-15 | 4−ヒドロキシ−4'−イソプロポキシジフェニルスルホン顕色剤の分散液、湿式粉砕方法および感熱記録体 |
Country Status (7)
Country | Link |
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US (1) | US7674748B2 (ja) |
EP (1) | EP1726450B1 (ja) |
JP (1) | JP4591445B2 (ja) |
KR (1) | KR101117217B1 (ja) |
BR (1) | BRPI0508819B1 (ja) |
DE (1) | DE602005010671D1 (ja) |
WO (1) | WO2005087502A1 (ja) |
Families Citing this family (1)
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KR101041901B1 (ko) * | 2008-09-09 | 2011-06-17 | 김찬래 | 감열지 제조방법 |
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JPH11321112A (ja) * | 1998-03-19 | 1999-11-24 | Ricoh Co Ltd | 感熱記録材料およびそれを利用した感熱ラベル |
JP2000263935A (ja) * | 1999-03-12 | 2000-09-26 | Ricoh Co Ltd | 感熱記録材料 |
JP2001260541A (ja) * | 2000-03-15 | 2001-09-25 | Oji Paper Co Ltd | 感熱記録体 |
JP2001310560A (ja) * | 2000-02-25 | 2001-11-06 | Ricoh Co Ltd | 記録材料 |
JP2002200847A (ja) * | 2000-10-24 | 2002-07-16 | Oji Paper Co Ltd | 感熱記録体 |
JP2002326463A (ja) * | 2001-05-01 | 2002-11-12 | Ougi Sangyo Kk | 感熱記録体 |
JP2003094837A (ja) * | 2001-09-25 | 2003-04-03 | Ougi Sangyo Kk | 感熱記録体 |
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JP2664188B2 (ja) | 1988-03-17 | 1997-10-15 | 王子製紙株式会社 | 感熱記録体 |
JP2836074B2 (ja) | 1988-09-13 | 1998-12-14 | 日本曹達株式会社 | 4−ヒドロキシ−4▲’▼−イソプロポキシジフェニルスルホン顕色用組成物、湿式粉砕法及び分散液 |
JPH03173689A (ja) | 1989-11-30 | 1991-07-26 | Kanzaki Paper Mfg Co Ltd | 感熱記録体 |
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JPH05309951A (ja) | 1992-05-07 | 1993-11-22 | New Oji Paper Co Ltd | 感熱記録体 |
JPH0687270A (ja) | 1992-09-08 | 1994-03-29 | New Oji Paper Co Ltd | 感熱記録材料 |
CN1052194C (zh) | 1993-12-27 | 2000-05-10 | 日本曹达株式会社 | 用于彩色显影的含有4-羟基-4'-异丙氧基二苯砜的组合物及其湿性研磨法和分散液 |
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JPH09207440A (ja) | 1996-01-31 | 1997-08-12 | Oji Paper Co Ltd | 感熱記録体の製造方法 |
JPH1132112A (ja) | 1997-07-14 | 1999-02-02 | Sanyo Electric Co Ltd | 電話機 |
JP2000351276A (ja) | 1999-06-10 | 2000-12-19 | Ricoh Co Ltd | 感熱記録材料の製造方法 |
JP2003326463A (ja) | 2002-05-08 | 2003-11-18 | Mitsubishi Materials Corp | 電鋳薄刃砥石 |
-
2005
- 2005-03-15 WO PCT/JP2005/004535 patent/WO2005087502A1/ja active Application Filing
- 2005-03-15 EP EP05720792A patent/EP1726450B1/en not_active Ceased
- 2005-03-15 JP JP2006511035A patent/JP4591445B2/ja not_active Expired - Fee Related
- 2005-03-15 DE DE602005010671T patent/DE602005010671D1/de not_active Expired - Lifetime
- 2005-03-15 US US10/592,687 patent/US7674748B2/en not_active Expired - Fee Related
- 2005-03-15 KR KR1020067017937A patent/KR101117217B1/ko not_active IP Right Cessation
- 2005-03-15 BR BRPI0508819-4A patent/BRPI0508819B1/pt not_active IP Right Cessation
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JPH11321112A (ja) * | 1998-03-19 | 1999-11-24 | Ricoh Co Ltd | 感熱記録材料およびそれを利用した感熱ラベル |
JP2000263935A (ja) * | 1999-03-12 | 2000-09-26 | Ricoh Co Ltd | 感熱記録材料 |
JP2001310560A (ja) * | 2000-02-25 | 2001-11-06 | Ricoh Co Ltd | 記録材料 |
JP2001260541A (ja) * | 2000-03-15 | 2001-09-25 | Oji Paper Co Ltd | 感熱記録体 |
JP2002200847A (ja) * | 2000-10-24 | 2002-07-16 | Oji Paper Co Ltd | 感熱記録体 |
JP2002326463A (ja) * | 2001-05-01 | 2002-11-12 | Ougi Sangyo Kk | 感熱記録体 |
JP2003094837A (ja) * | 2001-09-25 | 2003-04-03 | Ougi Sangyo Kk | 感熱記録体 |
Non-Patent Citations (1)
Title |
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See also references of EP1726450A4 * |
Also Published As
Publication number | Publication date |
---|---|
BRPI0508819B1 (pt) | 2013-02-05 |
EP1726450A4 (en) | 2007-06-27 |
EP1726450A1 (en) | 2006-11-29 |
US20070191226A1 (en) | 2007-08-16 |
KR20070015917A (ko) | 2007-02-06 |
KR101117217B1 (ko) | 2012-03-15 |
EP1726450B1 (en) | 2008-10-29 |
US7674748B2 (en) | 2010-03-09 |
JP4591445B2 (ja) | 2010-12-01 |
BRPI0508819A (pt) | 2007-08-07 |
DE602005010671D1 (de) | 2008-12-11 |
JPWO2005087502A1 (ja) | 2008-04-24 |
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