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Modified carbon black, and preparation method and application thereof in preparation of black chemical powdered ink

A modified, carbon black technology, applied in chemical instruments and methods, optics, electrography, etc., can solve the problems of poor dispersibility, wide particle size distribution, poor carbon black wettability, etc., to improve dispersibility and stability, The effect of improving utilization and improving hydrophilicity

Active Publication Date: 2014-03-19
鼎龙(宁波)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention lies in the poor wettability of carbon black in the prior art, the instability in the aqueous medium, and the poor dispersibility which cause uneven distribution of toner particles and excessively wide particle size distribution, and then provide an improved The method of permanent carbon black obtains a kind of modified carbon black with good wettability and good stable dispersibility in aqueous medium;

Method used

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  • Modified carbon black, and preparation method and application thereof in preparation of black chemical powdered ink
  • Modified carbon black, and preparation method and application thereof in preparation of black chemical powdered ink

Examples

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Effect test

Embodiment 1

[0046] The modified carbon black described in the present embodiment is prepared through the following steps:

[0047] (1) Add 5kg of carbon black to 100L of concentrated sulfuric acid, stir at a speed of 200r / min, stir evenly, control the temperature at 30°C, and react for 2h;

[0048] (2) Take 7kg of strong oxidant hydrogen peroxide and 8kg of potassium permanganate, 15kg in total, and add it to the mixed solution obtained in step (1), and react in a water bath at 25°C for 1 hour;

[0049] (3) Stir the mixed solution obtained in step (2) at a speed of 200 r / min, slowly add deionized water to dilute, filter under reduced pressure, and wash to obtain the modified carbon black.

[0050] The method for preparing black chemical toner with the prepared modified carbon black comprises the following steps:

[0051] (1) Take 1.8kg of sodium lauryl sulfate and 1.8kg of sodium cetyl sulfate, and make a total of 3.6kg of the above surfactants into a deionized aqueous solution with a co...

Embodiment 2

[0057] The modified carbon black described in the present embodiment is prepared through the following steps:

[0058] (1) Add 6kg of carbon black to 100L of concentrated nitric acid, stir at a speed of 300r / min, stir evenly, control the temperature at 70°C, and react for 6h;

[0059] (2) Take 5kg of strong oxidant potassium dichromate and 5kg of potassium hypochlorite, 10kg in total, and add it to the mixed solution obtained in step (1), and react in a water bath at 35°C for 3h;

[0060] (3) Stir the mixed solution obtained in step (2) at a speed of 300 r / min, slowly add deionized water to dilute, filter under reduced pressure, and wash to obtain the modified carbon black.

[0061] The method for preparing black chemical toner with the prepared modified carbon black comprises the following steps:

[0062] (1) Get 2kg of the surfactant laurylamine hydrochloride and 2kg of stearyl amine hydrochloride to make a deionized aqueous solution with a concentration of 15wt%; get 6kg o...

Embodiment 3

[0068] The modified carbon black described in the present embodiment is prepared through the following steps:

[0069] (1) Add 17.5kg of carbon black to 300L of concentrated hydrochloric acid, stir at a speed of 300r / min, stir evenly, control the temperature at 70°C, and react for 4h;

[0070] (2) Take 10kg of strong oxidizing agent potassium hypochlorite and 25kg of potassium persulfate, 35kg in total, and add it to the mixed solution obtained in step (1), and react in a water bath at 30°C for 2 hours;

[0071] (3) Stir the mixed solution obtained in step (2) at a speed of 400 r / min, slowly add deionized water to dilute, filter under reduced pressure, and wash to obtain the modified carbon black.

[0072] The method for preparing black chemical toner with prepared carbon black comprises the steps:

[0073] (1) Take the mixture of the surfactant lauryl sulfonate 3kg, aliphatic amide sulfate 3kg, sodium dodecylbenzenesulfonate 3kg and polyoxyethylene alkyl ether 3kg to make a ...

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Abstract

The invention provides preparation methods of modified carbon black and black chemical powdered ink. The preparation method of the carbon black comprises the following steps: (1) adding 5 to 30 parts by weight of carbon black to 100 to 500 parts by volume of concentrated acid; uniformly agitating; and controlling the temperature to be 30 to 70 DEG C to react for 2 to 6 hours; (2) adding 15 to 50 parts by weight of strong oxidant to the mixed solution obtained in step (1), and reacting for 1 to 3 hours in a water bath at 30 DEG C; and (3) agitating the mixed solution obtained in step (2), slowly adding deionized water, diluting, performing reduced-pressure suction filtration, and washing to obtain the modified carbon black. The black chemical powdered ink is prepared through such modified carbon black. Due to the adoption of the preparation methods, the problems of the prior art that the carbon black has poor wettability and is instable in an aqueous medium to further cause that the powdered ink is non-uniform in particle distribution and excessively wide in particle size, can be solved.

Description

technical field [0001] The invention belongs to the technical field of chemical toner, and in particular relates to a modified carbon black suitable for preparing black chemical toner used in laser printers or copiers and its application for preparing black chemical toner. Background technique [0002] With the advent of the information age, office automation has become the mainstream development trend of all walks of life. People's demand for high-speed office equipment is increasing, and toner, as the main consumable of office automation equipment, is growing rapidly and steadily year by year. [0003] Currently on the market, regardless of original toner or general-purpose toner, there are roughly two production methods: physical method (crushed toner) and chemical method (polymerized toner). The physical method is to mix solid resin, magnetic material (optional), pigment, charge regulator, wax, various additives, etc., and then go through many steps such as mixing, melti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/56C09C3/06G03G9/08
Inventor 王玉凤徐坤
Owner 鼎龙(宁波)新材料有限公司
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