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Novel quinacridone pigment composition, and process for production of quinacridone microparticles

A pigment composition, quinacridone technology, applied in the direction of thin material processing, organic dyes, nanotechnology for materials and surface science, etc., can solve the problem of undisclosed methods, transparency, spectroscopic characteristics, and durability characteristics. Appearance, great energy, etc.

Inactive Publication Date: 2013-01-16
M TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the solvent milling and solvent salt milling methods, there are problems as follows: since the crystal growth and pulverization are carried out in parallel, not only a large amount of energy is required, but also a strong force acts on the quinacridone pigment, and the color tone, transparency, etc. , spectroscopic characteristics, durability, etc., which are expected as pigment nanoparticles, do not appear
[0006] In addition, as shown in Patent Document 3, the applicant of the present application proposed a new production method of pigment nanoparticles that precipitate pigments through a processing surface that can be approached and separated, but for quinacridone pigments The specific method of nanoparticles is not disclosed

Method used

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  • Novel quinacridone pigment composition, and process for production of quinacridone microparticles
  • Novel quinacridone pigment composition, and process for production of quinacridone microparticles
  • Novel quinacridone pigment composition, and process for production of quinacridone microparticles

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Embodiment

[0098] Regarding the present invention, an example in which the following quinacridone microparticles were produced by using the apparatus of the applicant of the present application, which is based on the same principle as that described in Patent Document 3: in the transmission spectrum in the range of 350 to 800 nm The difference between the highest (Tmax1) and the lowest (Tmin) transmittance (Tmax1-Tmin) is more than 80% of quinacridone particles, and the highest (Tmax2) and minimum (Tmin) transmittance in 350-580nm The difference (Tmax2-Tmin) is more than 30% of quinacridone particles, and the difference between the highest (Tmax 1) and the lowest (Tmin) of the transmittance (Tmax1-Tmin) in the transmission spectrum in the range of 350-800nm It is 80% or more, and the wavelength (λmax) at which the transmittance reaches the highest in 350 to 500 nm is less than 430 nm. However, the present invention is not limited to the following examples.

[0099] use figure 1 The dev...

Embodiment (1～5

[0108] While feeding methanol or pure water as the first fluid from the center at a supply pressure of 0.30 MPaG and a rotation speed of 300 to 3600 rpm, dissolve 2,9-bis in concentrated sulfuric acid (98%) as the second fluid. A 2,9-dimethylquinacridone solution of methylquinacridone (HOST PARM PI NK E(-TS): manufactured by Clariant, C.I. Pigment Red 122) was introduced between the treatment surfaces 1 and 2. The 2,9-dimethylquinacridone particle dispersion is discharged from between the treatment surfaces 1 and 2. The discharged 2,9-dimethylquinacridone fine particles were slowly aggregated, and centrifuged (×26000G) to settle. The supernatant after the centrifugation treatment was removed, pure water was added to disperse the 2,9-dimethylquinacridone fine particles, and the centrifugation was repeated again to wash the 2,9-dimethylquinacridone fine particles. The finally obtained paste of 2,9-dimethylquinacridone fine particles was vacuum-dried at 30° C. and −0.1 MPaG. Th...

Embodiment 6～9

[0113] While feeding methanol or pure water as the first fluid from the center at a supply pressure of 0.30 MPaG and a rotation speed of 1700 rpm, quinacridone (Cinquasia Violet) dissolved in concentrated sulfuric acid (98%) was used as the second fluid. R NRT-795D: C.I. Pigment Violet 19) solution of non-substituted quinacridone manufactured by CIBA was introduced between 1 and 2 surfaces for treatment. The non-substituted quinacridone microparticle dispersion liquid is discharged from between the treatment surfaces 1 and 2. The discharged non-substituted quinacridone microparticles were slowly aggregated, and centrifuged (×26000G) to settle. The supernatant after the centrifugation treatment was removed, pure water was added to disperse the non-substituted quinacridone fine particles, and the centrifugation was repeated again to wash the non-substituted quinacridone fine particles. The finally obtained paste of unsubstituted quinacridone fine particles was vacuum-dried at 3...

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Abstract

Disclosed are a quinacridone pigment composition containing quinacridone microparticles which have durability and spectral characteristics equivalent to those required for a magenta color of a dye; and a process for producing the quinacridone microparticles. Specifically disclosed are a quinacridone pigment composition containing at least one type of quinacridone microparticles, wherein the quinacridone microparticles are characterized in that the difference between the maximum transmittance (Tmax1) and the minimum transmittance (Tmin) (i.e., Tmax1 - Tmin) is 80% or more in a transmission spectrum at 350 to 800 nm and the difference between the maximum transmittance (Tmax2) and the minimum transmittance (Tmin) (i.e., Tmax2 - Tmin) is 30% or more in a transmission spectrum at 350 to 580 nm, or that the difference between the maximum transmittance (Tmax1); and the minimum transmittance (Tmin) (i.e., Tmax1 - Tmin) is 80% or more in a transmission spectrum at 350 to 800 nm and the wavelength (max) at which the transmittance in a transmission spectrum at 350 to 500 nm becomes maximum is less than 430 nm; and a process for producing the quinacridone microparticles.

Description

technical field [0001] The present invention relates to a novel quinacridone pigment composition and a method for producing quinacridone microparticles. Background technique [0002] Quinacridones or quinacridones are magenta or magenta organic pigments used in a wide range of fields such as paints, inkjet inks, color filters, and toners. As a coloring material, it is not only excellent in color characteristics such as tinting power, transparency, and color rendering power, but also excellent in durability such as water resistance, heat resistance, light resistance, and weather resistance, so it is used in many fields in industry. [0003] As the spectral characteristic of magenta, it absorbs the middle wavelength range (approximately 500 to 600 nm) in the visible range of the wavelength range of 380 to 780 nm, and needs to transmit or reflect light in other ranges. As an example, in Patent Document 1, in the photosensitive coloring composition for magenta, the magenta dye ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20C09B67/02C09B67/04C09B67/10G02B5/22
CPCG03G9/092G03G9/00Y10S977/788B29B9/10C09D7/007G02B5/22C09B67/0027C09B67/0096C09B67/0014C09D11/322B82Y30/00Y10S977/90Y10S977/773Y10T428/2982C09B67/006C09B67/0097C09B67/0002C09D7/41
Inventor 前川昌辉本田大介榎村真一
Owner M TECH CO LTD
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