Making method of colored toner

A technology of color toner and initiator, which is applied in the field of preparation of color toner for copying and printing, can solve the problems of poor compatibility between resin and pigment, poor control of particle shape, high energy consumption of reaction process, etc., and achieve waste toner rate Low, bright colors, good uniformity of size and shape

Inactive Publication Date: 2017-06-20
SPECIAL CHEM CO LTD DALIAN FIRSTAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the suspension polymerization method has improved a lot compared with the original melting pulverization method, its energy consumption is reduced, but the particle size of the prepared colored particles is between 5 and 30 μm, and the prepared particle size distribution is still wide
And the particle size of the color toner prepared by the existing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0025] After stirring 1.0 g of polyvinyl alcohol and 100 ml of deionized water at 80° C. for 2 hours, it was cooled to room temperature. Then add 0.066 g of sodium lauryl sulfate, 0.033 g of sodium sulfate, and 0.032 g of hydroquinone to the aqueous solution of polyvinyl alcohol, and stir at room temperature for 3 hours until dissolved to obtain an aqueous phase. The obtained aqueous phase is called aqueous phase A-1 .

preparation Embodiment 2

[0027] After stirring 0.9 g of polyethylene oxide and 100 ml of deionized water at 80° C. for 2 hours, it was cooled to room temperature. Add 0.066 g of dioctyl sodium succinate, 0.033 g of sodium sulfate, and 0.032 g of hydroquinone to the aqueous solution of polyvinyl alcohol, and stir at room temperature for 3 hours to dissolve to obtain an aqueous phase. The obtained aqueous phase is called the aqueous phase. A-2.

[0028] Preparation Example 1 of Oil Phase

[0029] Add 17 g of styrene, 5.9 g of butyl acrylate and 1.03 g of dibenzoyl peroxide into a 100 ml beaker, stir slowly until dissolved, then add 0.96 g of dye solvent yellow 163, 0.5 g of charge regulator, and 1.0 g of wax , continue to stir until dissolved to obtain an oil phase, and the obtained oil phase is called oil phase B-1.

[0030] Preparation Example 2 of Oil Phase

[0031] Add 15 g of styrene, 7.3 g of butyl acrylate and 2.0 g of azobisisobutyronitrile into a 100 ml beaker, stir slowly until dissolved, t...

preparation Embodiment 3

[0039] Preparation of emulsion: Mix water phase A-2 and oil phase B-2, add to membrane emulsifier, and undergo 3 to 5 membrane emulsification operations (pressure control 0.01 to 0.30 MPa) to obtain emulsion.

[0040]Preparation of colored microspheres: Pour the obtained emulsion into a three-necked flask equipped with a stirrer, a thermometer and nitrogen gas, first adjust the rotation speed to 90-100 r / min, and feed nitrogen gas for 30-60 minutes, then stop nitrogen gas flow, and The temperature of the reaction solution was raised to 60-100 oC, the rotational speed was adjusted to 150-160 r / min, and the reaction was carried out for 10-24 hours. Stop the reaction, cool the reaction solution to room temperature, centrifuge with a centrifuge, move the solid to a beaker, wash with ethanol 3 times, and then wash 3 times with deionized water. Dry the solid particles at a temperature of 40-45°C so that the water content is less than 0.5wt%. Finally, add silicon dioxide and mix unif...

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Abstract

The invention discloses a making method of colored toner. The method comprises the steps of dissolving dye into an oil phase, then mixing the oil phase with a water phase, emulsifying by using a membrane emulsification apparatus under certain pressure, and adopting an emulsion polymerization method to obtain colored microspheres. The method solves the problems that the original 'mixed melting method' is complicated in process technology, high in requirements for raw materials, equipment and process conditions, high in energy consumption, and the like. The method also solves the problem that the common chemical method for preparing the toner is poor in process amplification stability. The colored microspheres prepared by the method are good in particle size uniformity, high in degree of sphericity, bright in color, glossy, high in resolution ratio, low in powder rejection rate, simple in technology and low in energy consumption, and do not need to be classified; after the colored microspheres are used, the colored toner with the needed particle size can be obtained at one time, and a series of performance tests such as particle size, sphericity, amount of charge and fixing temperature distribution can be carried out on the colored toner.

Description

technical field [0001] The invention relates to a preparation method of color toner for copying and printing. Background technique [0002] The traditional preparation method of color toner is the "melting method", that is, the resin, colorant and additive are mixed evenly and then mixed at high temperature, then extruded, cooled, crushed, ultra-finely pulverized, classified, and finally added some to change its flow. Grinding with permanent external additives to obtain color toner with a particle size of about 10 μm. This preparation method is complicated in process, high in energy consumption and high in cost. The particle size of the obtained product is large, the particle size distribution is wide, the shape of the particle is extremely irregular, and the distribution of each component is uneven, etc., which all affect the quality of the toner. print effect. In recent years, the research on the preparation of toner by direct polymerization has been fully developed. Po...

Claims

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Application Information

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IPC IPC(8): G03G9/08
CPCG03G9/0802
Inventor 秦学孔毕晨光陈鹏孙国林王力成彭孝军
Owner SPECIAL CHEM CO LTD DALIAN FIRSTAR
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