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Charge controlling agent and toner using metal compound of cyclic phenol sulfide

A metal compound, charge control agent technology, applied in the development agent, electrographics, optics, etc., can solve the problems of large variation of toner charging characteristics, easy variation of copy image quality, lack of clarity of copied image, etc. Good reproducibility of fine lines, excellent environmental stability, excellent effect of dispersibility and stability of compounds

Inactive Publication Date: 2011-06-08
HODOGOYA CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of these charge control agents have insufficient affinity for the binder resin of the toner and a triboelectric charging imparting effect, and the charge initiation speed is slow, so there is a lack of sharpness of the initial copied image, and the quality of the copied image during continuous copying is poor. Disadvantages of easy change
In addition, there is a disadvantage that the charging characteristics of the toner fluctuate greatly with respect to environmental conditions, and the image quality changes significantly due to seasonal factors.

Method used

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  • Charge controlling agent and toner using metal compound of cyclic phenol sulfide
  • Charge controlling agent and toner using metal compound of cyclic phenol sulfide
  • Charge controlling agent and toner using metal compound of cyclic phenol sulfide

Examples

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Effect test

Embodiment 1

[0169] The present invention will be described below in conjunction with examples, but these examples do not limit the present invention in any way. In the examples, "parts" all mean "parts by mass".

[0170] In a 1L four-necked flask equipped with a stirrer, a cooling tube, a thermometer and a gas introduction tube, 120.2g (0.8mol) of 4-tert-butylphenol, 51.3g (1.6mol) of monomer sulfur and 16.0g (0.4mol) of sodium hydroxide were added ), add 360.5g of diphenyl ether to it, keep it at 130°C while stirring in a nitrogen stream, and carry out the reaction for 1 hour while removing the water and hydrogen sulfide produced by the reaction, and then heat up to 170°C to remove the reaction The generated water and hydrogen sulfide were reacted for 1 hour, and then the temperature was increased to 230°C, and the reaction was performed for 18 hours while removing the water and hydrogen sulfide generated by the reaction. The reaction mixture was cooled to room temperature, and after addin...

Embodiment 2

[0176] Add 8.65 g (0.012 mol) of the above-mentioned refined product obtained in Example 1 into a 500 ml four-necked flask, add 300 ml of the above-mentioned boric acid buffer solution (pH 8.5-8.6), and heat to 50°C. 2.99g (0.012mol) of cobalt acetate tetrahydrate suspended in 100ml of the above-mentioned boric acid buffer (pH8.5~8.6) was added dropwise over 10 minutes. After dripping the dark pink cobalt acetate, the reaction liquid changed to light blue. The pH after the dripping was completed was 7.5. After stirring for 4 hours while heating to 50°C, it was cooled to room temperature. The reaction product was collected by filtration under reduced pressure, washed 3 times with 50 ml of water, and dried under reduced pressure at 120°C to obtain a brownish yellow powder in the general formula (1) where R is tert-butyl, m is 4, and n is 0, Y is 9.29g of the compound of the present invention with cobalt.

Embodiment 3

[0178] In a 500ml four-necked flask equipped with a stirrer, a cooling tube, and a thermometer, 56.2g of cyclic phenol sulfide in which R is tert-butyl, m is 4, n is 0, and Y are all hydrogen atoms in the general formula (1) is added ( 0.078 mol), 224.8 g (4 times wt / wt) of acetic acid, 5.15 g (0.0156 mol) of sodium tungstate dihydrate, 5.31 g (0.039 mol) of sodium acetate trihydrate, and the temperature was raised to 60°C while stirring . While stirring, 121.2 g (1.248 mol) of a 35% hydrogen peroxide aqueous solution was added dropwise to the flask over about 1.5 hours. After the dropwise addition, the mixture was stirred at 60°C for 15 hours and then at 70°C for 15 hours. Next, 15.8 g (0.156 mol) of 36% hydrochloric acid was added dropwise at 80°C while stirring, and then stirred at 80°C for 1 hour. After cooling to room temperature, a white solid precipitated. The white solid was collected by filtration under reduced pressure, washed 3 times with 80 ml of water, and dried...

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Abstract

Provided are a charge controlling agent comprising, as the active ingredient, a metal compound of a cyclic phenol sulfide represented by the general formula (1) (wherein at least one of a plural number of Y's is a metal atom), and a toner comprising at least one kind of the above-described compound together with a coloring agent and a binder resin. This charge controlling agent overcomes the problems of less clearness in the early printed images and fluctuation in printed image qualities during continuous printing, shows a good charge rise which makes it applicable to high-speed printers employed in recent years, has an excellent environmental stability with little change in charge amount depending on a change in temperature or humidity, and has a large frictional charge amount. By using this charge controlling agent, a negatively charged toner having a high charge performance can be provided.

Description

Technical field [0001] The present invention relates to a charge control agent used in an image forming apparatus for developing electrostatic latent images in the fields of electrophotographic and electrostatic recording, and a negatively charged toner containing the charge control agent. Background technique [0002] In the image formation process using the electrophotographic method, an electrostatic latent image is formed on inorganic photoreceptors such as selenium, selenium alloys, cadmium sulfide, and amorphous silicon or organic photoreceptors using charge generators and charge transport agents. It is developed, transferred to paper or plastic film, and fixed to obtain a visible image. [0003] The photoreceptor has positive and negative charging properties according to its composition. When the printed part is left as an electrostatic latent image by exposure, it is developed with an electric toner with the opposite sign, and the printed part is removed and reversed. In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/097
CPCG03G9/0975G03G9/09775G03G9/09783
Inventor 安村正照伊藤雅美青木良和大久保正树大塚英之渡边纯
Owner HODOGOYA CHEMICAL CO LTD
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