Color composition for pixel-forming ink, pigment dispersion liquid, pixel-forming ink, color filter, and production methods thereof

A technology for coloring composition and manufacturing method, which is applied in the direction of ink, pigment paste, photoplate making process of patterned surface, etc., can solve the problems of reduced physical properties of dispersed pigments, color tone changes, etc., and achieve high color concentration and high fineness , high transmittance effect

Inactive Publication Date: 2012-03-07
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the physical properties of the dispersed pigment may decrease and the color tone may change

Method used

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  • Color composition for pixel-forming ink, pigment dispersion liquid, pixel-forming ink, color filter, and production methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Example 1 (Preparation of Cyan Pigment Dispersion Used in CF Applications)

[0102] (a) Micronization of cyan pigments used in CF applications

[0103] PB15:6 (ε-type copper phthalocyanine blue pigment, called "cyan pigment-1") is subjected to micronization treatment for use as a cyan pigment in CF applications. Mix 90 parts of PB15:6, 5 parts of copper phthalocyanine monosulfonated derivatives, and 5 parts of copper phthalocyanine phthalimide methyl derivatives, and add them together with 400 parts of sodium chloride and 130 parts of diethylene glycol In a kneader fitted with a pressurized lid. Pre-mix in the kneader until a uniform wet mass is formed, then close the pressurized lid at 6kg / cm 2 Kneading and grinding were performed for 7 hours while squeezing the contents under high pressure. Put the obtained ground material into 3000 parts of 2% sulfuric acid aqueous solution and stir it for 1 hour, then filter it with a filter press to remove sodium chloride and di...

Embodiment 2

[0111] Embodiment 2 (preparation of various colored pigment dispersions)

[0112] (a) Micronization of various pigments used in CF applications

[0113] Other pigments used for CF were ground in the same manner as in Example 1(a). Instead of PB15:6 used in Example 1(a), PR177 (anthraquinone-based red pigment, referred to as "Red Pigment-1"; hereinafter the same), PR254 (diketopyrrolopyrrole-based red pigment, "red pigment -2"), PR242 (high molecular weight disazo red pigment, "red pigment-3"), PG36 (bromo-chlorinated copper phthalocyanine green pigment, "green pigment-1"), PG58 (bromo-chlorinated Zinc phthalocyanine green pigment, "green pigment-2"), poly(13~16) brominated copper phthalocyanine green pigment, "green pigment-3"), PG7 (copper chloride phthalocyanine green pigment, "green pigment- 4"), PY150 (nickel complex azo-based yellow pigment, "Yellow Pigment-1"), PY138 (quinophthalone-based yellow pigment, "Yellow Pigment-2") and PV23 (dioxazine purple pigment, "Yellow P...

Embodiment 3

[0125] Preparation of "Pigment Dispersion Liquid (2)" of various colors used in the application of Example 3CF

[0126] (a) Preparation of "Pigment Color Paste (2)"

[0127] In the same manner as in Example 1(b), 10 parts of XB solvent and 50 parts of 40% XB solution of polymer dispersant-1 were added to a water squeezer equipped with a heating device and a vacuum distillation device, and they were uniformly mixed. 40 parts of the filter paste of the micronized cyan pigment obtained in Example 1 (a) and the red pigment, green pigment, yellow pigment, and purple pigment obtained in Example 2 (a) were added thereto in terms of solid content. The filter paste of each micronized pigment is squeezed after kneading. The separated water was discharged to the outside of the system, and the residual water was distilled off by operating the vacuum distillation apparatus while kneading. Next, the obtained squeeze color pastes of pigments of various colors were kneaded using a twin-roll...

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Abstract

Disclosed is a color composition for pixel-forming inks, which improves the characteristics that are required for a liquid crystal color display for television receivers or the like, namely higher density of the pixel color, high definition and optical characteristics such as high contrast. Also disclosed are a pigment dispersion liquid, a pixel-forming ink, a color filter and methods for producing the same. Specifically disclosed is a method for producing a color composition that is used for a pixel-forming ink for color filters. The method for producing a color composition is characterized by comprising a step (a) wherein an aqueous filtered paste or aqueous slurry of a pigment having an average pigment particle diameter of 5-100 nm is prepared, a step (b) wherein the pigment contained in the aqueous filtered paste or aqueous slurry is transferred from the water phase to the organic medium phase that is composed of an organic solvent medium or a molten resin medium, without going through a drying process, and a step (c) wherein the thus-transferred pigment is finely dispersed, thereby obtaining a color composition. A pigment dispersion liquid and a pixel-forming ink can be produced using the color composition, and pixels of a color filter are formed with this ink.

Description

technical field [0001] The present invention relates to a coloring composition for pixel forming ink, an ink for pixel forming, a color filter, and methods for producing them. Background technique [0002] With the recent great development of information equipment, liquid crystal color displays are used as information display components in the display screens of televisions, projectors, personal computers, mobile information devices, monitors, car navigation systems, mobile phones, electronic computers and electronic dictionaries ; Displays for information bulletin boards, guide bulletin boards, function display boards, signage boards, etc.; digital cameras and camera screens, etc. All information displays many aspects of related equipment. Along with this, color filters mounted on liquid crystal color displays are required to have higher quality in terms of color characteristics and optical characteristics of image performance such as fineness, color density, light transmit...

Claims

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Application Information

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IPC IPC(8): C09D11/00C09B67/20C09B67/46C09D17/00G02B5/20
CPCC09D17/003C09B67/009C09D11/101C09D11/322G02B5/201G03F7/0007
Inventor 幸正弘江木慎一郎高鸭雅则荒井一孝土居诚司坂本茂山口俊夫松崎悟中村道卫
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD
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