High-performance electrophoretic particle and electrophoretic disclosing solution

A high-performance electrophoretic particle technology, which is applied in the treatment of dyed high-molecular organic compounds, nonlinear optics, dyed low-molecular organic compounds, etc., to achieve the effect of good suspension dispersion and good dispersion

Inactive Publication Date: 2014-10-01
GUANGZHOU OED TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to provide a high-performance electrophoretic particle for the deficiencies of the prior art, which can effectively solve the problem of agglomeration of electrophoretic display particles, and has high stability and dispersibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation steps of black electrophoretic display particles are as follows:

[0027] A. Mixing step: Add 200.0g vinylbenzylaminoethylaminopropyltrimethoxysilane hydrochloride to 10 liters of toluene and stir for more than 5 minutes to form a homogeneous solution, then add 2kg copper chrome black pigment powder, Then add this mixture into a high-speed mixer for pre-dispersion for 20 minutes to obtain mixed solution A;

[0028] B, nano-grinding step: add mixed solution A to the SuperFlow grinder of Buhler Company and grind for 4 to 6 hours, and control the grinding temperature to be 50-60 degrees Celsius to obtain mixed solution B;

[0029] C, cleaning step: discharge the mixed solution B after grinding, carry out centrifugation and cleaning treatment, and obtain the pigment mixture;

[0030] D. Polymer wrapping steps:

[0031] D1: Take 200g of the cleaned pigment mixture into a three-necked bottle, then add 1L of toluene, 100g of polystyrene, 50g of polyvinylpyrid...

Embodiment 2

[0040] The preparation steps of white electrophoretic display particles are as follows:

[0041] A. Mixing step: Add 50.0g of methacryloxypropyl trimethoxysilane to 10 liters of mixed solvent of xylene and dimethylformamide and stir for more than 5 minutes to form a homogeneous solution, then add 3kg of titanium dioxide , and then add this mixture into a high-speed mixer for pre-dispersion for 30 minutes to obtain a mixed solution A;

[0042] B. Nano-grinding step: add the mixed solution A to the SuperFlow grinder of Buhler Company and grind for 3 to 4 hours, and control the grinding temperature to be 70-80 degrees Celsius to obtain the mixed solution B;

[0043] C, cleaning step: discharge the mixed solution B after grinding, carry out centrifugation and cleaning treatment, and obtain the pigment mixture;

[0044] D. Polymer wrapping steps:

[0045] D1: Take 300g of the cleaned pigment mixture into a three-necked bottle, then add 1L of toluene and 500g of dodecyl methacryla...

Embodiment 3

[0054] The preparation steps of green electrophoretic display particles are as follows:

[0055] A. Mixing step: Add 100.0g of methacryloxypropyl triethoxysilane to a mixed solvent of 10 liters of naphtha and isopropyl myristate and stir for more than 5 minutes to form a uniform solution, then add 5ml of ammonia water, add 2.5kg of cobalt green into this solution, and then add this mixture into a high-speed mixer for pre-dispersion for 60 minutes to obtain mixed solution A;

[0056] B. Nano-grinding step: add the mixed solution A into the grinder and grind for 4 to 5 hours, and control the grinding temperature to 80-90 degrees Celsius to obtain the mixed solution B;

[0057] C, cleaning step: discharge the mixed solution B after grinding, carry out centrifugation and cleaning treatment, and obtain the pigment mixture;

[0058] D. Polymer wrapping steps:

[0059] D1: Take 300g of the cleaned pigment mixture into a three-necked bottle, then add 1L of toluene and 600g of octadecy...

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Abstract

The invention discloses a high-performance electrophoretic particle. The high-performance electrophoretic particle comprises a plurality of pigment particles, wherein the surfaces of the pigment particles are coated by a high-molecular polymer via a surface modifying agent. The high-performance electrophoretic particle is prepared through the following steps: A, mixing: a step of dissolving the surface modifying agent with an anhydrous organic solvent and dispersing to-be-treated pigment powder in the obtained solution so as to obtain a mixed solution A; B, nanometer grinding: a step of treating the mixed solution A by using nanometer fine grinding technology so as to obtain a mixed solution B; C, cleaning: a step of cleaning the mixed solution B so as to obtain a pigment mixture; and D, high-molecular coating: a step of treating the pigment mixture by using high-molecular coating technology so as to obtain the high-performance electrophoretic particle. The invention further discloses an electrophoretic disclosing solution. The high-performance electrophoretic particle provided by the invention has good suspension dispersibility and realizes no settlement and layering in 15 d without stirring. The electrophoretic disclosing solution has good dispersibility, stability and photoelectric performance.

Description

technical field [0001] The invention belongs to the technical field of electrophoretic display, and in particular relates to a high-performance electrophoretic particle and an electrophoretic display liquid. Background technique [0002] At present, in the field of electrophoretic display technology, electrophoretic display particles are generally prepared by the following method: the pigment powder is mixed with a surface modifier (usually a coupling agent) in an alcohol-water mixture to perform pigment surface modification treatment, and then the pigment is centrifuged. After fully drying, the dried pigments are ground, and finally the pigments are coated with polymers. However, this method has many disadvantages, mainly including: 1. The existence of the drying step causes the pigment to agglomerate, and the particle size becomes larger, which reduces the dispersibility of the pigment particles, and further grinding is necessary; 2. During the dry grinding process, The s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/08C09C3/10C09C3/08C09C3/12G02F1/167
Inventor 白世龙周建林黄超良苏彩云
Owner GUANGZHOU OED TECH INC
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