Pigment dispersion liquid preparation method

A pigment dispersion and pigment technology, applied in the field of pigment dispersion preparation, can solve the problems of uneven particle size dispersion and difficulty in obtaining small sizes, and achieve the effects of high penetration contrast, high contrast, and high dispersion

Active Publication Date: 2019-07-26
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The current methods of preparing pigments are all obtained through the "top-down" method, that is, through physical methods to achieve pigments from la

Method used

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  • Pigment dispersion liquid preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1. Using the network structure of covalent organic frameworks (Covalent Organic Frameworks, COF) to prepare a pigment dispersion of red pigments

[0033] This embodiment one includes the following steps:

[0034] Step S1, preparing a covalent organic framework material, the covalent organic framework material has a network structure, and during the preparation process, organic building units are connected together through covalent bonds to form a porous framework with a periodic structure.

[0035] Specifically, the covalent organic framework material can be produced in the following manner: a Schiff base reaction occurs between a tetrakis(4-formylphenyl)methane compound and a phenylenediamine compound under the action of a catalyst to obtain a covalent organic framework material. Wherein, the tetrakis(4-formylphenyl)methane compound is tetrakis(4-formylphenyl)methane or tetrakis(4-formylphenyl)methane derivative, and the phenylenediamine compound is p- Phenyle...

Embodiment 2

[0048] Embodiment 2, Utilize the network structure of COF to prepare the pigment dispersion liquid of green pigment

[0049] Using the network structure of COF in Example 1 as a template, the green pigment is prepared into a pigment solution. Taking three common green pigments in color photoresists, Pigment Green 7, Pigment Green 36, and Pigment Green 58 as examples, the The covalent organic framework material is placed in the pigment solution, and the nanocrystal structure of the green pigment can be formed after standing still for 120 minutes. The crystals are separated from the network structure of the COF, and then a surfactant is added to obtain a pigment dispersion liquid of green pigments with high dispersion and uniform particle size. Among them, the molecular structural formulas of Pigment Green 7, Pigment Green 36 and Pigment Green 58 are respectively

[0050]

Embodiment 3

[0051] Example 3. Using the network structure of COF to prepare the pigment dispersion of yellow pigment

[0052] Using the network structure of COF in Example 1 as a template, the yellow pigment was prepared into a pigment solution. Taking three common yellow pigments in color photoresist, Pigment Yellow 138, Pigment Yellow 150, and Pigment Yellow 185 as examples, the The covalent organic framework material is placed in the pigment solution, and the nanocrystal structure of the yellow pigment can be formed after standing still for 120 minutes. Crystals are separated from the network structure of COF, and a surfactant is added to obtain a pigment dispersion liquid of yellow pigment with high dispersion and uniform particle size. Among them, the molecular structural formulas of Pigment Yellow 138, Pigment Yellow 150 and Pigment Yellow 185 are respectively

[0053]

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Abstract

The invention provides a pigment dispersion liquid preparation method. The method includes: taking a covalent organic framework material with a network structure as a template, and crystallizing pigment molecules, in a solution form, in the network structure of the covalent organic framework material, so that the pigment crystal grain size can be controlled by the mesh size of the network structure of the covalent organic framework material; after complete pigment crystallization, separating out pigment crystals from the covalent organic framework material by means of brine washing, and addinga surfactant, so that high-dispersity and uniform-particle-size pigment dispersion liquid can be obtained. The pigment dispersion liquid subjected to aftertreatment can be used for preparation of color photoresist and is a high-performance pigment capable of realizing high penetrativity and high contrast of display products, and the covalent organic framework material is recyclable.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for preparing a pigment dispersion. Background technique [0002] A thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD) has many advantages such as a thin body, power saving, and no radiation, and has been widely used. Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module. Usually, the liquid crystal display panel is composed of a color filter (Color Filter, CF) substrate, a TFT array substrate, a liquid crystal (Liquid Crystal, LC) sandwiched between the color filter substrate and the TFT array substrate, and a sealant (Sealant); its molding process Generally includes: front-end array (Array) process and CF process (thin film, yellow light, etching and stripping), middle-end cell (Cell) process (T...

Claims

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Application Information

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IPC IPC(8): C08G12/08G03F7/004
CPCC08G12/08G03F7/004
Inventor 查宝
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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