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

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...

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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;

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