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Pigment composition for red color filter, method for producing the same, color composition using the same, and color filter

A technology for pigment compositions and compounds, applied in chemical instruments and methods, instruments, filters, etc., can solve the problems of low yield, poor processing resistance, etc., and achieve the effect of high contrast

Active Publication Date: 2010-12-15
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, until now, when the primary particle size is reduced as described above, high contrast can be obtained, but on the other hand, the processing resistance of the color filter manufacturing process It is often poor. Specifically, when processing into a red color filter, if a radiation-sensitive pigment composition containing fine Pigment Red 254 (C.I. Pigment Red 254) is used, there is a problem that foreign matter is generated on the pixel and the manufacturing yield is low.

Method used

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  • Pigment composition for red color filter, method for producing the same, color composition using the same, and color filter
  • Pigment composition for red color filter, method for producing the same, color composition using the same, and color filter
  • Pigment composition for red color filter, method for producing the same, color composition using the same, and color filter

Examples

Experimental program
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Effect test

preparation example Construction

[0297] (Preparation of Coloring Composition)

[0298] In order to disperse the diketopyrrolopyrrole pigment composition of the present invention in the pigment carrier, various dispersing devices such as a three-roll mixer, a two-roll mixer, a sand mill, and a kneader can be used. In addition, in order to disperse these well, dispersion aids such as various surfactants and pigment derivatives may be added as appropriate. By using a dispersing assistant, it is possible to prepare a coloring composition that is excellent in the dispersion of the pigment and prevents re-agglomeration of the dispersed pigment.

[0299] In addition to the diketopyrrolopyrrole pigment of the present invention, red pigments, yellow pigments, dyes, antioxidants, polymerization inhibitors, leveling agents, humectants, viscosity regulators, etc. additives, preservatives, antibacterial agents, surfactants, anti-caking agents, ultraviolet absorbers, infrared absorbers, fillers or conductive materials and...

Embodiment 1

[0315] (first process)

[0316] In a stainless steel reaction vessel with a reflux tube, 200 g of tert-amyl alcohol dehydrated with molecular sieves and 140 g of sodium tert-amyloxide were added under a nitrogen atmosphere, and heated to 100° C. while stirring to prepare an alkoxide solution.

[0317]On the other hand, 88 g of diisopropyl succinate, 97.0 g of 4-chlorobenzonitrile, and 3.9 g of 4-cyanobiphenyl were added to a 500 mL glass flask, and heated to 90°C while stirring to dissolve them. Solutions of these mixtures were prepared. While vigorously stirring, the heated solution of this mixture was slowly added dropwise to the above-mentioned alkoxide solution heated to 100° C. at a constant speed over 2 hours. After completion of the dropwise addition, heating and stirring were continued at 90° C. for 2 hours to obtain an alkali metal salt of a diketopyrrolopyrrole pigment composition.

[0318] Furthermore, 600 g of methanol, 600 g of water, and 304 g of acetic acid we...

Embodiment 2

[0323] 97.0 g of 4-chlorobenzonitrile and 3.9 g of 4-cyanobiphenyl in Example 1 were changed to 95.0 g of 4-chlorobenzonitrile and 6.5 g of 4-cyanobiphenyl. The first step of 1 and the second step are performed in the same manner to obtain a fine diketopyrrolopyrrole pigment composition.

[0324] The obtained fine diketopyrrolopyrrole pigment composition was observed by TEM as spherical particles with a primary particle size of 20 to 40 nm in diameter. The yield was 77.1g.

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Abstract

Disclosed is a fine diketopyrrolopyrrole pigment composition which enables achievement of a good contrast ratio. Generation of undesired matter during a heating step of a red color film containing the pigment composition is remarkably reduced when compared with the conventional ones. Also disclosed are a color composition using the diketopyrrolopyrrole pigment composition, a red color film and a color filter. Specifically disclosed is a diketopyrrolopyrrole pigment composition obtained by reacting 1 mole of a succinic acid diester with 2 moles in total of mixed nitriles having specific structural formulae. Also specifically disclosed are a color composition using the diketopyrrolopyrrole pigment composition, a red color film and a color filter.

Description

technical field [0001] The present invention relates to a color filter pigment composition for producing a color filter mounted in an imaging tube element such as a color liquid crystal display, a digital camera, a video camera, a copier, or a scanner, and a method for producing the same. Moreover, it is related with the coloring composition for color filters which used this pigment composition, and a color filter. In more detail, the present invention relates to a diketopyrrolopyrrole pigment, which is a fine diketopyrrolopyrrole pigment, a coloring composition using the same, a red coloring film, and a color filter. The red coloring film containing this pigment greatly reduces the generation of foreign matter caused by the heating process compared with conventional ones, and when it is applied to a color filter, a good contrast can be obtained. Background technique [0002] The color filter is composed of fine stripes (color stripes) of two or more different color tones a...

Claims

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Application Information

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IPC IPC(8): C09B67/20C09B57/00C09B67/04G02B5/20
CPCG02B1/04C09B67/0039G02B5/287C09B57/004C09B67/0089C08L33/10C08L33/12C09B67/0022G02B5/20
Inventor 室星太郎大村彻鹤谷进典
Owner TOYO INK SC HOLD CO LTD
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