A kind of composite resin emulsion for toner and preparation method thereof

A composite resin and emulsion technology, used in instruments, optics, developers, etc., can solve the problems of carrier and developing roller contamination, free wax particles, poor compatibility, etc.

Active Publication Date: 2019-07-09
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

However, due to the poor compatibility between wax and resin, wax particles will be released, which will cause pollution to the carrier and developing roller, and wax film formation on the photoreceptor, so its durability cannot be guaranteed.

Method used

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  • A kind of composite resin emulsion for toner and preparation method thereof
  • A kind of composite resin emulsion for toner and preparation method thereof
  • A kind of composite resin emulsion for toner and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0064] Preparation of Wax-Modified Crystalline Polyester A:

[0065] 52.5g montan acid wax U (acid value of 72 to 92 mgKOH / g), 150 g of terephthalic acid, 170 g of 1,4-butanediol and 25 g of catalyst dibutyltin oxide were put into a reactor equipped with a stirrer, thermometer, condenser and nitrogen introduction pipe , the temperature was raised to 180°C under nitrogen atmosphere, and reacted for 2h; then 15g 1,6-adipic acid was put into the reaction kettle, and the temperature was further raised to 210°C, and the reaction was performed for 3h; vacuumed to 2kPa, continued to react for 0.5h, material, cooled to room temperature, pulverized, finely powdered, and sieved to prepare wax-modified crystalline polyester A. The obtained wax-modified crystalline polyester A had a melting point (Tm) of 58° C., Mn of 4380, Mw of 16,720, Mw / Mn of 3.82, and an acid value of 27 mgKOH / g.

[0066] Preparation of styrene-acrylic resin B

[0067] Put 300 g of xylene into the reaction kettle...

Embodiment 1

[0071] 30g of styrene-acrylic resin B was added to 60g of methyl ethyl ketone, heated at 65°C and stirred at a speed of 500rpm for 20min, then added 120g of deionized water, added 2.1g of ammonia water (mass fraction was 10%), and continued to stir at a speed of 500rpm to form Uniform phase. Then, 40 g of the above wax-modified crystalline polyester A and 110 g of amorphous polyester C were respectively added, heated at 75°C and stirred at a speed of 1,000 rpm for 20 min, and then 4.4 g of ammonia water (mass fraction of 10%) was added to neutralize the dissolved Resin, continue to stir for 10min to form a mixed solution of styrene-acrylic resin and polyester resin. Then, under the condition of heating at 78°C and vigorous stirring at a speed of 3,000rpm, 275g of deionized water was slowly added at a rate of 6.8g / min to make the resin solution phase inversion, and the organic solvent was removed by distillation to form a styrene-acrylic resin. / Polyester resin composite emul...

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Abstract

The invention provides a composite resin emulsion for toner and a preparation method thereof. The composite resin emulsion for toner includes the following raw materials in parts by mass: 1-30 parts of wax-modified crystalline polyester, 10-40 parts Amorphous polyester and 1-20 parts of styrene-acrylic resin. The toner prepared from the resin emulsion of the present invention can simultaneously realize low-temperature fixability and heat-resistant storage stability, and has excellent durability and anti-sticking property.

Description

technical field [0001] The invention belongs to the technical field of emulsion for electrostatic developing toner, and in particular relates to a composite resin emulsion for toner and a preparation method thereof. Background technique [0002] In recent years, as printers and copiers have become faster and more energy-efficient, there has been an increasing demand for toners that can simultaneously satisfy performance requirements such as low-temperature fixability, heat-resistant storage, and high-quality image quality. [0003] Compared with traditional physical toners, chemical toners have better low-temperature fixability, uniform chemical composition, small particle size, and narrow particle size distribution, making it easier to achieve high-quality images. [0004] Emulsion polymerization and suspension polymerization are commonly used chemical toner preparation methods. However, these two methods can only use styrene and acrylic monomers that can undergo free radi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/06C08L67/02C08L25/14G03G9/12
CPCC08L67/06C08L2201/08C08L2205/03G03G9/131G03G9/132C08L67/02C08L25/14
Inventor 姚雪丽齐俊梅王雪辉李晓蕾刘川
Owner 天津市合成材料工业研究所有限公司
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