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Method for preparing carbazole diazine organic pigment

A technology of carbazole diyazine and organic pigments, which is applied in the field of preparation of high-grade purple organic pigment compositions, can solve problems such as increased viscosity of the system, poor fluidity, and impact on use, and achieves improved tinting strength, reduced surface energy, Crystalline surface perfecting effect

Inactive Publication Date: 2019-12-20
河北捷虹颜料化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pigment Violet P.V.23 produced by traditional techniques will flocculate when applied to solvent-based inks, resulting in higher system viscosity and poor fluidity, seriously affecting its use in this field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a. In a 10-square horizontal ball mill, fill 1 / 2 volume of steel balls with a diameter of 20-30mm. Add 1000 kg of crude Pigment Violet P.V. 23 and 500 kg of sodium sulfate. Grind at 25 rpm for 24 hours.

[0027] b. Add 100kg (pigment-containing amount) of the above grinding material into a 1500L kneader, add 400kg of sodium chloride powder and 100kg of diethylene glycol, and knead at 100-110°C for 10 hours. The kneaded mixture was beaten with 10 times of water, the water was filtered to wash off the salt and the solvent, and then dried and pulverized to obtain 98 kg of pigments.

[0028] c. Add 10 kg of pigment sulfonic acid derivatives to the pigment powder obtained above, and mix evenly to obtain the final product.

Embodiment 2

[0030] a. In a 10-square horizontal ball mill, fill 2 / 3 of the volume with steel balls, the diameter of which is 20-30mm. Add 1000 kg of crude Pigment Violet P.V. 23 and 500 kg of sodium sulfate. Grind at 25 rpm for 24 hours.

[0031] b. Add 100kg (pigment-containing amount) of the above grinding material into a 1500L kneader, add 400kg of sodium chloride powder and 100kg of diethylene glycol, and knead at 100-110°C for 10 hours. 10 kg of pigment sulfonic acid derivatives were added and kneading was continued for 1 hour. The kneaded mixture was beaten with 10 times of water, washed with filtered water to remove salt and solvent, then dried and pulverized to obtain 108 kg of pigment.

Embodiment 3

[0033] a. In a 10-square horizontal ball mill, fill 2 / 3 of the volume with steel balls, the diameter of which is 25mm. Add 1000 kg of crude Pigment Violet P.V. 23 and 500 kg of sodium sulfate. Grind at 25 rpm for 24 hours.

[0034] b. Add 50kg (pigment-containing amount) of the above grinding material into a 1500L kneader, add 500kg of sodium chloride powder and 90kg of diethylene glycol, and knead at 100-110°C for 10 hours. The kneaded mixture was beaten with 10 times of water, the water was filtered to wash off the salt and the solvent, and then dried and pulverized to obtain 98 kg of pigments.

[0035] c. Add 10 kg of pigment sulfonic acid derivatives to the pigment powder obtained above, and mix evenly to obtain the final product.

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Abstract

The invention discloses a method for preparing a carbazole diazine organic pigment. The method comprises the following steps: adding a crude product of a pigment, namely purple P. V. 23, into grindingequipment, and performing crushing grinding at a certain temperature; putting the grinded crude product of the pigment into a kneading machine, adding an inorganic salt grinding aid and an adhesive into the kneading machine, and performing grinding for a certain time at a certain temperature so as to obtain a pigment mixture; adding water, performing pulping, performing water washing to remove the adhesive and the inorganic salt grinding aid, and performing drying and crushing so as to obtain dark purple powder; adding a pigment dispersant into the prepared dark purple powder, and performinguniform mixing, so as to obtain a final desired product. The pigment, namely purple P. V. 23, which is prepared by using the method, has good pigment coloring performance and a red phase, and meanwhile is low in ink system viscosity, good in flowability and high in stability when being applied to a solvent type ink system.

Description

technical field [0001] The invention relates to a preparation method of a high-grade purple organic pigment composition, in particular to a preparation method of a carbazole diyazine (P.V.23) organic pigment. Background technique [0002] Pigment Violet P.V.23 is a high-grade blue light purple organic pigment with high tinting strength and good heat resistance, solvent resistance, light and weather resistance, etc. It can be used in the coloring of high-grade inks, coatings, plastics, etc. In the past, due to its high price, Pigment Violet P.V.23 was mainly used for toning. With the reduction of production costs, its use is becoming more and more extensive. [0003] Pigment Violet P.V.23 produced by traditional techniques will flocculate when used in solvent-based inks, resulting in increased viscosity and poor fluidity, which seriously affects its use in this field. [0004] On the other hand, the shade of P.V.23 has a relatively blue shade, and more and more application f...

Claims

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Application Information

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IPC IPC(8): C09B67/04C09B67/10C09B67/38C09B19/00
CPCC09B19/00C09B67/0002C09B67/0014C09B67/008
Inventor 张东江张荔
Owner 河北捷虹颜料化工有限公司
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