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Coloring material and method for producing coloring material

A manufacturing method and pigment technology, which are applied in the direction of electric recording process applying charge pattern, electric recording process applying electric charge pattern, instruments, etc., can solve the problem of poor fixability, decrease of binder resin content, and unfinished fixability. Toner and other problems, to achieve the effect of excellent fixability

Inactive Publication Date: 2011-05-25
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the color development and decolorization are improved with the increase of the color developer, if the amount of the color developer is more than 2.5 times the mole of the color compound, its content in the toner must be more than 5 wt%, The content of the binder resin will decrease, so the fixability tends to deteriorate
In addition, if the content of the color developer is less than 5% by weight, sufficient color development cannot be obtained.
Therefore, a toner excellent in fixability, capable of sufficient color development, and decolorable has not yet been obtained.

Method used

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  • Coloring material and method for producing coloring material
  • Coloring material and method for producing coloring material
  • Coloring material and method for producing coloring material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In the examples, various aminophenol compounds were prepared as color developers.

[0078] Preparation of Pyrogallol Derivatives

[0079] Preparation of developer (nitration)

[0080] · Dichloromethane: 60g

[0081] ·Pyrogallol: 30g

[0082] Concentrated nitric acid (concentration 60%, density 1.38g / cm 3 ): 10g

[0083] After mixing dichloromethane and pyrogallol in the three-necked flask, connect the thermometer, cooling tube, and dropping funnel to the three-necked flask, while stirring moderately, cool to 0°C, and use the dropping funnel to add concentrated Nitric acid, so that the temperature of the contents becomes below 5°C. 30 minutes after the completion of the dropwise addition, an aqueous sodium bicarbonate solution was gradually added. After the neutralization was completed, an oil layer was obtained using a separatory funnel. While stirring the oil layer moderately, hexane was added to obtain a precipitate. The precipitate was sufficiently dried and ...

Embodiment 2

[0124] Preparation of developer (nitration)

[0125] · Dichloromethane: 60g

[0126] Bisphenol A: 30g

[0127] Concentrated nitric acid (concentration 60%, density 1.38g / cm 3 ): 10g

[0128] After mixing dichloromethane and bisphenol A in the three-necked flask, connect the thermometer, cooling tube, and dropping funnel to the three-necked flask, while stirring moderately, cool to 0°C, and add concentrated nitric acid dropwise with the dropping funnel , so that the temperature of the contents becomes below 5°C. 30 minutes after the completion of the dropwise addition, an aqueous sodium bicarbonate solution was gradually added. After the neutralization was completed, an oil layer was obtained using a separatory funnel. While stirring the oil layer moderately, hexane was added to obtain a precipitate. The precipitate was sufficiently dried to obtain a nitrated intermediate. By GCMS, H 1 NMR and C 13 As a result of NMR measurement, it was found that 98% of the nitrated b...

Embodiment 3

[0195] Preparation of catechol derivatives

[0196] Preparation of developer (nitration)

[0197] · Dichloromethane: 60g

[0198] · Catechol: 30g

[0199] Concentrated nitric acid (concentration 60%, density 1.38g / cm 3 ): 10g

[0200] After mixing dichloromethane and catechol in the three-necked flask, connect the thermometer, cooling tube, and dropping funnel to the three-necked flask, while stirring moderately, cool to 0°C, and dropwise add the Concentrated nitric acid so that the temperature of the contents becomes below 5°C. 30 minutes after the completion of the dropwise addition, an aqueous sodium bicarbonate solution was gradually added. After the neutralization was completed, an oil layer was obtained using a separatory funnel. While stirring the oil layer moderately, hexane was added to obtain a precipitate. The precipitate was sufficiently dried to obtain a nitrated intermediate. By GCMS, H 1 NMR and C 13 As a result of NMR measurement, it was found that 98...

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PUM

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Abstract

The invention provides a coloring material and a method for producing the coloring material. According to one embodiment, a color erasable coloring material containing a binder resin, and dispersed therein, a color developable compound and a color developing agent is provided. The color developing agent to be used in the coloring material contains at least an aminohydroxy derivative. The aminohydroxy derivative is obtained by subjecting a starting material selected from a benzene ring compound having a hydroxy group and a heterocyclic compound having a hydroxy group to nitration, hydrogenation, and alkylation.

Description

[0001] Cross References to Related Applications [0002] This application is based upon and claims the benefit of priority from US Provisional Patent Application Serial No. 61 / 263485, filed November 23, 2009, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an erasable recording material that can be used in a developer for electrophotography, an ink for inkjet, and the like. Background technique [0004] From the viewpoint of achieving environmental protection and economy by reducing the amount of recording media such as paper used, technology that eliminates the color of toner or ink images formed on recording media such as paper and reuses recording media such as paper , is very effective. [0005] Toners having decolorization properties, such as toners for electrophotography containing color-forming compounds proposed by companies such as Toshiba, have been disclosed. This technology uses the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/09
CPCG03G9/0928G03G9/09G03G9/09758G03G9/09733G03G13/28
Inventor 宇土基成
Owner KK TOSHIBA