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Pigment violet 23 composition and preparation method and application thereof

A technology of pigment violet and its composition, which is applied in the field of pigment violet 23 composition and its preparation, can solve the problems of low color power, achieve the effects of improved stability and color power, high color power and stability, and simplified process steps

Active Publication Date: 2020-07-03
浙江浩川科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention proposes a composition of Pigment Violet 23 and its preparation method and application, aiming to solve the problem of low color power of existing Pigment Violet 23

Method used

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  • Pigment violet 23 composition and preparation method and application thereof
  • Pigment violet 23 composition and preparation method and application thereof
  • Pigment violet 23 composition and preparation method and application thereof

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preparation example Construction

[0031] The present invention provides a preparation method of pigment violet 23 composition, which includes the following steps:

[0032] (1) Weigh a certain mass of aromatic amine, add a hydrochloric acid solution to it to dissolve, and add sodium nitrite under an ice bath for diazotization reaction to obtain diazonium salt.

[0033] Specifically, the structural formula of the aromatic amine in this embodiment is the following formula I:

[0034]

[0035] n takes any integer between 4-44, that is, the methoxy polyethylene glycol segment is MPEG400-2000.

[0036] When the molecular weight of the methoxy polyethylene glycol segment is 360-440, the structural formula of the corresponding aromatic amine is:

[0037]

[0038] When the molecular weight of the methoxy polyethylene glycol segment is 1000-1200, the structural formula of the corresponding aromatic amine is:

[0039]

[0040] When the molecular weight of the methoxy polyethylene glycol segment is 1800-2200, the structural formula ...

Embodiment 1

[0062] Synthesize the pigment violet 23 composition with the aromatic amine shown in the following formula (formula III): weigh 200 parts by weight of the conventionally pigmented pigment violet 23 filter cake, the solid content of which is 30%, and 300 parts by weight of distilled water for beating. Take another small beaker, weigh 3 parts by weight of aromatic amine of formula III, add 100 parts by weight of 0.53% hydrochloric acid solution (the molar ratio of hydrochloric acid to aromatic amine is 2.5), and add 0.42 parts by weight of sodium nitrite under ice water bath ( The molar ratio of sodium nitrite to aromatic amine is 1.05) Diazotization, react for 20 minutes, KI starch test paper detects excess nitrous acid. Pour the diazonium liquid into the pigment slurry, react for 30 minutes, adjust the pH to 5-6, hold for 30 minutes, and heat to 50°C to continue the reaction until there is no diazonium salt in the system. Adjust the pH to 7, filter, rinse with distilled water u...

Embodiment 2

[0065] The composition of pigment violet 23 is synthesized using the aromatic amine shown in the following formula (formula IV): weigh 200 parts by weight of the conventional pigmented pigment violet 23 filter cake, the solid content of which is 40%, and 800 parts by weight of distilled water for beating. Take another small beaker, weigh 8 parts by weight of the aromatic amine of formula V, add 100 parts by weight of 0.78% hydrochloric acid solution (the molar ratio of hydrochloric acid to aromatic amine is 3), and add 0.6 parts by weight of sodium nitrite under ice water bath ( The molar ratio of sodium nitrite to aromatic amine is 1.2) Diazotization, react for 20 minutes, KI starch test paper detects excess nitrous acid. Pour the diazonium liquid into the pigment slurry, react for 30 minutes, adjust the pH to 5-6, hold for 30 minutes, and heat to 50°C to continue the reaction until there is no diazonium salt in the system. Adjust the pH to 7, filter, rinse with distilled wate...

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Abstract

The invention provides a pigment violet 23 composition and a preparation method and application thereof, and the preparation method comprises the following steps: (1) weighing a certain mass of aromatic amine, adding a hydrochloric acid solution into the aromatic amine to dissolve the aromatic amine, and adding sodium nitrite in an ice bath to carry out diazotization reaction to obtain a diazoniumsalt, (2) mixing the diazonium salt solution obtained in the step (1) with pigmented pigment violet 23 filter cake, stirring for a period of time, adjusting the pH value to 5-6 until the diazonium salt completely reacts, and adjusting the pH value to 7, and (3) filtering and rinsing the product obtained in the step (2), drying at 50-80 DEG C, and powdering to obtain the pigment violet 23 composition. The pigment violet 23 filter cake is directly pigmented, the pigment derivative is generated in situ, so that the pigment derivative can be used as a product without separation and after treatment, the process steps are simplified, and the color power and stability of the obtained pigment product are high.

Description

Technical field [0001] The present invention relates to the technical field of fine chemicals, in particular to a pigment violet 23 composition and a preparation method and application thereof. Background technique [0002] Pigment Violet 23 has a pure color and excellent performance in various applications. It is widely used in coatings, plastics, printing inks and textile printing and dyeing. All synthesized are crude pigment violet 23, which has chaotic crystal form, large particle size, and low tinting strength, and has no industrial application value. The crude pigment must be combined and processed. The essence of the composition and its preparation and treatment is the process of recrystallizing the crude pigment violet 23. Commonly used methods are kneading, ball milling, and solvent method. Derivative modification and surfactant treatment are often carried out with the composition and its preparation process; there are also derivatives or surface treatment agents after...

Claims

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Application Information

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IPC IPC(8): C09B67/22C09D7/63C09D7/65C09D11/037C08K5/18C08L71/02
CPCC08K5/18C08L71/02C09B67/0034C09D11/037C09D7/63C09D7/65
Inventor 陈发生喻李江陈晓阳江艳张海宝
Owner 浙江浩川科技有限公司
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