Dichlorodiketopyrrolopyrrole pigment, coloring material dispersion containing the pigment, and process for production of the coloring material dispersion

A technology of dichlorodiketopyrrole and coloring materials, applied in diketopyrrolopyrrole dyes, chemical instruments and methods, organic dyes, etc., can solve the problems of side reactions, low productivity, slowness, etc. The effect of cost burden

Inactive Publication Date: 2012-07-18
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under the high temperature and strong alkali conditions required for the synthesis, the particle growth inhibitor may decompose or may undergo side reacti

Method used

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  • Dichlorodiketopyrrolopyrrole pigment, coloring material dispersion containing the pigment, and process for production of the coloring material dispersion
  • Dichlorodiketopyrrolopyrrole pigment, coloring material dispersion containing the pigment, and process for production of the coloring material dispersion
  • Dichlorodiketopyrrolopyrrole pigment, coloring material dispersion containing the pigment, and process for production of the coloring material dispersion

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Experimental program
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Effect test

no. 1 approach

[0092] The coloring material dispersion of this embodiment is characterized in that it contains fine particles of a particle growth inhibitor and a dichlorodiketopyrrolopyrrole pigment having an α-type crystallinity of 0.65 to 0.90 in ( It has a grain size of 6.0 nm to 13.0 nm in the direction of the -151) crystal plane, and has a grain size of 5.0 nm to 23.0 nm in the direction of the (111) crystal plane.

[0093] [α-type crystallinity]

[0094] The use of dichlorodiketopyrrolopyrrole pigments in the α-type crystal conversion form for color filters is generally proposed (see Patent Document 3). When the α-type crystallinity is suppressed like the embodiment of the present invention, a color filter with high contrast can be obtained. On the other hand, there is concern that the viscosity of the dispersion as a raw material increases to impair the stability of the dispersion. The present inventors found that by setting the grain size of the dichlorodiketopyrrole pigment withi...

no. 2 approach

[0337] Another preferred embodiment (ie the second embodiment) of the present invention is described hereinafter. However, the invention is not limited to the embodiments described. Points common to the first embodiment may not be described, but some of them may be explained again.

[0338] In this embodiment, the crystallite size of the p-dichlorodiketopyrrolopyrrole pigment (see formula (I) below) as determined in the direction perpendicular to the (-151) crystal plane from the X-ray diffraction pattern 9nm or less, preferably 6nm or more, more preferably 7nm to 8.5nm. In the present embodiment, the method of obtaining the grain size as determined in the direction perpendicular to the (-151) crystal plane from the X-ray diffraction pattern was carried out according to the conditions and sequences described in the following examples, unless otherwise specified. By having a crystal grain size equal to or smaller than the above upper limit, particles having a small primary pa...

Embodiment

[0564] The present invention is described in more detail based on the examples given below, but the present invention is not limited to the examples. Unless otherwise specified, "parts" in the examples means "parts by mass", and "%" means "% by mass".

[0565] [Examples and comparative examples corresponding to the first embodiment]

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Abstract

Disclosed are: a coloring material dispersion which contains coloring material microparticles comprising a dichlorodiketopyrrolopyrrole pigment, enables the production of a color filter having high contrast, and can be reduced in viscosity when used as a raw material for the color filter; and a process for producing the coloring material dispersion. The coloring material dispersion contains a particle growth inhibitor and coloring material microparticles comprising a dichlorodiketopyrrolopyrrole pigment, wherein the coloring material microparticles have an alpha-type crystallinity degree of 0.65 to 0.90 inclusive, a crystallite size of 6.0 to 13.0 nm as determined in the direction of the (-151) crystal face, and a crystallite size of 5.0 to 23.0 nm inclusive as determined in the direction of the (111) crystal face.

Description

technical field [0001] The present invention relates to a dichlorodiketopyrrolopyrrole pigment, a coloring material dispersion containing the dichlorodiketopyrrolopyrrole pigment, and a production method thereof. Background technique [0002] In order to prepare microparticles of dichlorodiketopyrrolopyrrole pigments, several methods involving their crystalline forms have been proposed. [0003] Patent Document 1 discloses a method in which a diketopyrrolopyrrole pigment obtained by an acid paste method is salt milled in an organic solvent in the co-existence of a pigment derivative to suppress crystal growth, Thereby, a diketopyrrolopyrrole pigment having a small primary particle diameter is obtained. However, the acid pasting method is not preferable due to the use of concentrated sulfuric acid in terms of safety. In addition, since the salt mill needs to use a special inorganic salt that is particularly micronized, it has limitations in terms of cost. [0004] Patent D...

Claims

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Application Information

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IPC IPC(8): C09B67/46C09B57/00C09B67/02C09B67/20G02B5/20
CPCC09B67/0039C09B57/004G02B5/223C09B67/0002G02B5/201C09B67/0022C09B67/003C09B67/0033C09B57/00C09B67/0084C09B67/0097G02B5/20
Inventor 中平真一两角一真佐佐木大辅菊池涉神田博美石坂壮二兵藤知义金子祐士石地洋平
Owner FUJIFILM CORP
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