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Method for microfining organic pigment of color filter

A color filter and organic pigment technology, applied in the field of miniaturization, can solve the problems of poor stability and wide particle size distribution range, and achieve the effects of high stability, good fluidity and avoiding adhesion

Inactive Publication Date: 2007-09-05
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the technical problems of wide particle size distribution range and poor stability in the prior art, and provide a method for miniaturization of organic pigments for color filters, which can obtain a particle size distribution in the range of 10-100nm and high stability. Micronized Organic Pigments

Method used

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  • Method for microfining organic pigment of color filter
  • Method for microfining organic pigment of color filter
  • Method for microfining organic pigment of color filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Micronization of DPP red pigment using EFKA4047 hyperdispersant:

[0049] (1) Add 12g EFKA4047 hyperdispersant to 200g solvent to make a mixed solution;

[0050] (2) leave the mixed solution for 3 hours;

[0051] (3) 20g DPP red pigment is added in the mixed solution;

[0052] (4) stirring into an organic pigment mixed solution;

[0053] (5) Put the organic pigment mixture into the grinding cylinder, drive the grinding and stirring blades to rotate at a speed of 4500 rpm, drive the grinding cylinder to vibrate axially at a frequency of 2600 times per minute, and keep the inner cavity temperature of the grinding cylinder at 15°C temperature, and grind for 1.5 hours to obtain the target product.

[0054] The particle size distribution of the pigment was tested with a nanoparticle size analyzer, and the test results are shown in Figure 2.

Embodiment 2

[0056] Micronization of Phthalocyanine Blue Pigment Using TA-100 Hyperdispersant:

[0057] (1) 10g TA-100 hyperdispersant is dissolved in 50g solvent to make a mixed liquid;

[0058] (2) leave the mixed solution for 3.5 hours;

[0059] (3) 45g phthalocyanine blue pigment is added in the mixed solution;

[0060] (4) stirring into an organic pigment mixed solution;

[0061] (5) Put the organic pigment mixture into the grinding cylinder, drive the grinding and stirring blades to rotate at a speed of 4500 rpm, drive the grinding cylinder to vibrate axially at a frequency of 2600 times per minute, and keep the temperature of the inner cavity of the grinding cylinder at 10°C temperature, and grind for 1.0 hour to obtain the target product.

[0062] The particle size distribution of the pigment was tested with a nanoparticle size analyzer, and the test results are shown in Figure 3.

Embodiment 3

[0064] Micronization of DPP red pigments using TA-100 hyperdispersant:

[0065] (1) Add 23g TA-100 hyperdispersant to 400g solvent to form a mixed solution;

[0066] (2) the mixed solution is stirred by a magnetic stirrer;

[0067] (3) leave the mixed solution after stirring for 24 hours;

[0068] (4) 40g DPP red pigment is added in the mixed liquor;

[0069] (5) stirring into an organic pigment mixed solution;

[0070] (6) Add 26g resin in the organic pigment mixed solution;

[0071] (7) Put the above solution into the grinding cylinder, drive the grinding and stirring blades to rotate at a speed of 4500 rpm, drive the grinding cylinder to vibrate axially at a frequency of 2600 times per minute, and keep the temperature of the inner chamber of the grinding cylinder at 15°C. After grinding for 1.5 hours, the target product was obtained.

[0072] The particle size distribution of the pigment was tested with a nanoparticle size analyzer, and the test results are shown in Fi...

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Abstract

A method for refining organic pigment of color optical filter is carried out by adding super-dispersant into solvent to form into mixed liquid, laying aside, adding organic pigment into mixed liquid, agitating into organic pigment mixed liquid and grinding below 5-20degree >2500 time / min for 1-4hrs. The super-dispersant is amide polymer or modified poly-p-amine ester polymer 5-70wt% and solvent is ethyl acetate 100-1000wt%. It has homogeneous distribution, excellent stability and coloring performance. It can be used for light resistance of liquid-crystal display device.

Description

technical field [0001] The invention relates to a miniaturization method in the preparation process of organic pigments, in particular to a method for miniaturization of organic pigments used in color filters in the manufacture of LCD color filters. Background technique [0002] Micronized organic pigments are required in the preparation of pigment photoresists for color filters of liquid crystal displays. The coloring process of pigments is dispersed in the coloring body in the form of micronized particles, and the particle size directly affects its application performance such as coloring strength, transparency, heat resistance, light resistance and solvent resistance, so the particle size and particle size of organic pigments The distribution range and stability have a great influence on the color light, transparency, tinting strength and weather resistance of the liquid crystal display color filter. Studies have shown that when the particle size of the organic pigment i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/04G02B5/23
Inventor 李宏彦杨久霞
Owner BOE TECH GRP CO LTD
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