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Method for preparing colored toner used for laser printing and electrostatic copying

A technology for electrostatic copying and laser printing, applied in optics, electrographics, instruments, etc., can solve the problems of poor fixing effect, difficult to distribute colorants uniformly, and wide particle size distribution, achieve uniform coloring, and be beneficial to fixing performance and equipment. The effect of less investment

Inactive Publication Date: 2009-09-09
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing color toner for laser printing and electrostatic copying, which solves the problem of poor fixing effect caused by the monomodal distribution of molecular weight of color powder resin prepared by polymerization process, the difficulty of uniform distribution of colorants in color powder, and the difficulty of particle size distribution. Too wide and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Mix 25 grams of styrene, 8 grams of butyl acrylate, 6 grams of butyl methacrylate, 0.2 gram of paraffin and 0.06 gram of cetyl ammonium bromide;

[0014] (2) 0.05 grams of sodium lauryl sulfate, 5.5 grams of polyoxyethylene sorbitan monooleate, 2 grams of sorbitan monooleate, 2 grams of alkylphenol polyoxyethylene ether, 1 gram of polyvinyl alcohol 1788 is dissolved in 200 milliliters of water to obtain a surfactant solution;

[0015] (3) 2 grams of polystyrene with a viscosity-average molecular weight of about 100,000 is dissolved in the mixed solution obtained in step (1), and 0.6 grams of initiator azobisisobutyronitrile is added, and the coloring agent Gumito pink PT (Swiss Automobile Co., Ltd. Ba company product) 0.6 grams, pour into the three-necked bottle of 500 milliliters together, heat to 70 ℃ and react for 0.5 hour, pour the surfactant solution configured in step (2) into the three-necked bottle, and stir at 800 rpm to maintain about 40 minute, reduce th...

Embodiment 2

[0017] (1) 35 grams of styrene, 15 grams of butyl acrylate, 10 grams of butyl methacrylate, 0.5 gram of paraffin, and 0.12 grams of bis(3,5-di-tert-butylsalicylate) zinc are mixed uniformly;

[0018] (2) 0.07 grams of sodium lauryl sulfate, 6 grams of polyoxyethylene sorbitan monooleate, 2 grams of sorbitan monooleate, 4 grams of alkylphenol polyoxyethylene ether, 1.5 grams of polyvinyl alcohol 1788 were dissolved in 250 milliliters of water to obtain a surfactant solution;

[0019] (3) 1 gram of polystyrene with a viscosity-average molecular weight of 100,000 is dissolved in the mixed solution that step (1) obtains, and 1 gram of initiator azobisisobutyronitrile is added, and oil-soluble blue 2N (Swiss Ciba company product) 1.5 grams, poured into a 500ml three-necked bottle together, heated to 70°C for 1 hour, poured the surfactant solution prepared in step (2) into the three-necked bottle, stirred at 1000 rpm for about 30 minutes, lowered the stirring Speed ​​up to 300 rpm,...

Embodiment 3

[0021] (1) 25 grams of styrene, 8 grams of butyl acrylate, 5 grams of butyl methacrylate, 0.3 gram of paraffin, and 0.1 gram of bis(3,5-di-tert-butylsalicylate) zinc are mixed uniformly;

[0022] (2) 0.08 grams of sodium lauryl sulfate, 2 grams of polyoxyethylene sorbitan monooleate, 0.5 grams of sorbitan monooleate, 5 grams of alkylphenol polyoxyethylene ether, 1.2 grams of polyvinyl alcohol 1788 were dissolved in 200 milliliters of water to obtain a surfactant solution;

[0023] (3) 0.8 grams of polystyrene with a viscosity-average molecular weight of 100,000 is dissolved in the mixed solution obtained in step (1), and 0.6 grams of initiator azobisisobutyronitrile is added, and solvent yellow 3G (Shanghai Qihong Chemical Materials Co., Ltd. Product) 1.2 grams, poured into a 500 ml three-necked bottle together, heated to 70 ° C for 1.5 hours, poured the surfactant solution prepared in step (2) into the three-necked bottle, kept it at 800 rpm for about 20 minutes, lowered the ...

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PUM

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Abstract

The invention discloses a method for preparing colored toner used for laser printing and electrostatic copying. The invention combines with bulk polymerization, phase inversion polymerization, suspension polymerization technology and emulsion polymerization technology, and comprises the following steps: firstly, colorant and other additives are mixed with trace macromolecule, monomer and initiator completely for bulk polymerization for several hours, and aqueous phase solution which is dissolved with surfactant and dispersant is added to carry out the phase inversion and then polymerization is continuously carried out to obtain the product. The method obtains red, yellow and blue tricolor toner by polyreaction directly; the method has simple technology, less investment on equipment, energy saving and the uniform coloring of the product; and resin molecular weight shows bimodal distribution, thereby being good for fixation performance. The method overcomes the problem that unimodal distribution of the resin molecular weight causes poor fixation effect, uneasy even distribution of the colorant in the colored toner and over-wide particle size distribution during preparing the colored toner by the polymerization process.

Description

technical field [0001] The invention relates to a method for preparing color toner, in particular to a method for preparing color toner for laser printing and electrostatic copying, and belongs to the technical field of polymer material preparation. Background technique [0002] In the past 30 years, there have been many research patents on the preparation of toner by polymerization, including suspension polymerization process, core-shell structure toner preparation process, dispersion polymerization process, and coagulation treatment process. The suspension polymerization process is simple, and the obtained toner is spherical particles, but there are the following limitations: (1) the particle size distribution of the obtained toner is relatively wide; (2) the selection of monomer raw materials is restricted to a certain extent, currently mainly styrene and Acrylics. The advantage of the core-shell structure toner preparation process is that the core-shell function is sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08
Inventor 段玉丰付朝霞
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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