Powdered ink for electronic photographic development and preparation method thereof

A technology of electrophotography and toner, applied in the directions of developer, electrography, optics, etc., can solve the problems of high equipment requirements and complicated mixing methods, and achieve low equipment requirements, small residue, simple process and operation Effect

Inactive Publication Date: 2017-07-11
天津市合成材料工业研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the compatibility of the two resins has been significantly improved, and toners with the advantages of the two resins can be prepared, the method of mixing the two resins is complicated, and there is a problem of high equipment requirements. The high-cost production method is not conducive to Application and promotion of this type of toner in the market

Method used

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  • Powdered ink for electronic photographic development and preparation method thereof
  • Powdered ink for electronic photographic development and preparation method thereof
  • Powdered ink for electronic photographic development and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0051] Preparation of linear polyester resin:

[0052] Method 1: The following parts by weight are 160 parts of terephthalic acid; 100 parts of isophthalic acid; 200 parts of ethylene glycol; React for 3 hours and remove the water generated by the reaction, then carry out vacuum distillation on the system for 1 hour, keep the vacuum at 150 Pa, stop the reaction, cool down and discharge to obtain linear polyester resin E1. Tg (glass transition temperature of resin) = 54°C, Mn (number average molecular weight) = 3500, Mw (weight average molecular weight) = 28000.

[0053] Method 2: The following parts by weight, 130 parts of terephthalic acid; 130 parts of isophthalic acid; 200 parts of ethylene glycol; React for 3 hours and remove the water generated by the reaction, then carry out vacuum distillation on the system for 1.5 hours, keep the vacuum at 130Pa, stop the reaction, cool down and discharge to obtain linear polyester resin E2. Tg (glass transition temperature of resin)...

Embodiment 1

[0057] Mix the following vinyl monomers and linear polyesters, pigments, waxes and charge control agents in the following parts by weight

[0058]

[0059]

[0060] Disperse the above components into an oil phase with a bead mill at room temperature, add 4 parts of benzoyl peroxide as an oil-soluble initiator, and fully disperse for 30 minutes to obtain a monomer oil phase dispersion;

[0061] Dissolve 13 parts by mass of magnesium chloride in 100 parts by mass of deionized water, then slowly add 200 parts by mass to an aqueous solution in which 8 parts by mass of sodium hydroxide has been dissolved, disperse at high speed for 1 hour, and age ultrasonically at room temperature for 4 hours to obtain hydrogen Magnesium Oxide Suspending and Dispersing Agent.

[0062] Add the prepared monomer oil phase to the above-mentioned magnesium hydroxide suspension dispersant containing magnesium chloride electrolyte, and use a high-speed disperser to shear at 4000 rpm for 5 minutes t...

Embodiment 2

[0065] Mix the following vinyl monomers and linear polyesters, pigments, waxes and charge control agents in the following parts by weight

[0066]

[0067]

[0068] Disperse the above components into an oil phase with a bead mill at room temperature, add 4 parts of benzoyl peroxide as an oil-soluble initiator, and fully disperse for 30 minutes to obtain a monomer oil phase dispersion;

[0069] Dissolve 11 parts by mass of magnesium chloride in 100 parts by mass of deionized water, then slowly add 200 parts by mass into an aqueous solution in which 8 parts by mass of sodium hydroxide has been dissolved, disperse at high speed for 1.5 hours, and age ultrasonically at room temperature for 3 hours to obtain Magnesium Hydroxide Suspending and Dispersing Agent.

[0070] Add the prepared monomer oil phase to the above-mentioned magnesium hydroxide suspension dispersant containing magnesium chloride electrolyte, and use a high-speed disperser to shear at 4000 rpm for 5 minutes t...

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Abstract

The invention provides powdered ink for electronic photographic development and a preparation method thereof. The powdered ink comprises, by weight, 100 parts of a vinyl resin monomer, 5 to 30 parts of a linear polyester, 1 to 20 parts of a pigment, 1 to 20 parts of wax, 0.5 to 4 parts of a charge control agent, 0.1 to 3 parts of an additive and 2.5 to 4 parts of a polymerization initiator. The powdered ink for electronic photographic development is advantageous for reducing the fixation temperature and the energy consumption of the apparatus and does not cause high temperature shift and caking agglomeration. The preparation method of the powdered ink can produce powdered ink particles containing the linear polyester by a simple suspension polymerization method so that powdered ink performances are improved. The preparation method realizes preparation of polyester resin powdered ink by a chemical method without use of an emulsifier.

Description

technical field [0001] The invention belongs to the field of electrophotographic development, in particular to a toner for electrophotographic development. Background technique [0002] In the field of electrophotographic development, in order to obtain better image quality and higher resolution, more stringent requirements are put forward for the particle size and distribution of toner. The traditional mixing and pulverizing method of toner is limited in particle size and uniformity of particle size distribution, and cannot further improve the image quality and resolution. The toner can only be controlled by chemical methods. Particle size, to obtain toner particles with a sufficiently small particle size and uniform distribution. Common chemical toners include emulsion polymerization and suspension polymerization. Compared with emulsion polymerization, the process of suspension polymerization is simpler and requires less equipment. The performance of toner can be improved...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/087
CPCG03G9/08G03G9/0804G03G9/087
Inventor 王雪辉侯晓旭姚雪丽陈辉辉德瑞峰
Owner 天津市合成材料工业研究所有限公司
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