Pigment dispersing agent, pigment composition, and pigment coloring agent

A pigment dispersant and pigment technology, used in the fields of pigment dispersants, pigment compositions and pigment colorants, can solve the problems of reduced gloss of the coating film, increased viscosity of the binder, insufficient optical density, etc., and achieve the effect of inhibiting aggregation

Active Publication Date: 2020-06-26
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the viscosity of the vehicle in which the pigment particles are aggregated increases
In addition, if a vehicle containing aggregated pigment particles is used, the tinting power of ink and paint will decrease, the gloss of the coating film will decrease, and the optical density as a light-shielding material for forming BM will be insufficient.

Method used

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  • Pigment dispersing agent, pigment composition, and pigment coloring agent
  • Pigment dispersing agent, pigment composition, and pigment coloring agent
  • Pigment dispersing agent, pigment composition, and pigment coloring agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0120] 14.8 parts of cyanuric chloride, 12 parts of 4'-aminoacetanilide, and 9.6 parts of acetic acid were added to 100 parts of water, and reacted at 0 to 10°C for 1 hour. After adding 24.5 parts of N,N-dimethylaminopropylamine and reacting at 70 to 80° C. for 2 hours, 33 parts of concentrated hydrochloric acid were further added. After reacting at 90-100° C. for 1 hour for deacetylation, cool to 0-10° C., add 6 parts of sodium nitrite, carry out diazotization, and obtain a solution of diazonium salt. On the other hand, 30.5 parts of N-(4-methoxyphenyl)-2-hydroxy-11H-benzo[a]carbazole-3-carboxamide and 26 parts of sodium hydroxide were dissolved in 800 parts of methanol to prepare solution. The diazonium salt solution was added to the prepared solution, and the coupling reaction was carried out at 20-30° C. for 5 hours. After filtering and washing with water, it dried and obtained 49 parts of blue-violet pigment dispersants (A) represented by following formula (A).

[0121...

Embodiment 1-2

[0124] Except that 31 parts of N,N-diethylaminopropylamine was used instead of 24.5 parts of N,N-dimethylaminopropylamine, the blue color represented by the following formula (B) was obtained in the same manner as in Example 1-1 above. Purple pigment dispersant (B) 53 parts.

[0125]

[0126] A peak with a molecular weight of 837.05 was detected by mass spectrometry using MALDI. In addition, the purity measured by high performance liquid chromatography was 91%. From the raw materials used, the results of mass spectrometry and the results of high performance liquid chromatography, it was confirmed that the compound of the target structure was obtained.

Embodiment 1-3

[0128] Except that 45 parts of N,N-dibutylaminopropylamine was used instead of 24.5 parts of N,N-dimethylaminopropylamine, the blue color represented by the following formula (C) was obtained in the same manner as in Example 1-1 above. Purple pigment dispersant (C) 61 parts.

[0129]

[0130] A peak with a molecular weight of 949.27 was detected by mass spectrometry using MALDI. In addition, the purity measured by high performance liquid chromatography was 92%. From the raw materials used, the results of mass spectrometry and the results of high performance liquid chromatography, it was confirmed that the compound of the target structure was obtained.

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Abstract

Provided is a pigment dispersing agent which can significantly improve fluidity of liquids such as ink or paint that comprises pigment particles such as black azo pigment in a dispersed state, can prevent flocculation of the pigment particles, and enables manufacture of a colored article having excellent optical density while preventing generation of foreign matter. This pigment dispersing agent is a compound represented by general formula (1) where R1 and R2 are independently an amino group, of an amine compound comprising a basic nitrogen atom, that has lost one hydrogen atom and R3 and R4 are independently a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, or a hydroxyl group.

Description

technical field [0001] The present invention relates to a pigment dispersant, a pigment composition and a pigment colorant. More specifically, it relates to the compounding of printing inks (offset inks, gravure inks, etc.), various paints, plastics, pigment printing agents, dry toners for electrophotography, wet toners for electrophotography, inkjet recording Pigment dispersants in inks, inks for thermal transfer recording, resists for color filters, inks for writing instruments, etc. Background technique [0002] In general, it is difficult to mix and disperse pigments (particles) in a vehicle such as paint, gravure ink, and offset ink in a stable state. For example, fine pigment particles temporarily dispersed in a vehicle tend to aggregate in the vehicle. When the pigment particles aggregate, the viscosity of the vehicle increases. In addition, when a vehicle containing pigment particles in an aggregated state is used, various problems such as lowering of coloring pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20C08K5/3492C08L101/00C09D17/00D06P1/44G02B5/20
CPCC08K5/3492C08L101/00C09D17/00D06P1/44G02B5/20C09B67/0066C09B29/0011C09B29/3608C09B67/0046C09D11/037C07D403/12C09D17/003D06P1/6426
Inventor 柳本宏光尾迫秀和
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD
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