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Method for preparing pigment yellow 150 with salt mixture of kalium azoic barbiturate and natrium azoic barbiturate

A technology of potassium azobarbiturate and barbituric acid, which is applied in the directions of azo dyes, complex metal compounds of azo dyes, chemical instruments and methods, etc., can solve the changes in fluidity, weather resistance and solvent resistance. And other issues

Inactive Publication Date: 2009-10-21
XIANGTAN JIALI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For pigments used in ink and other directions, it is usually required to have a small particle size to obtain properties such as high transparency, high tinting strength, and good gloss, but at the same time it will also cause its fluidity, weather resistance, and solvent resistance. change

Method used

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  • Method for preparing pigment yellow 150 with salt mixture of kalium azoic barbiturate and natrium azoic barbiturate
  • Method for preparing pigment yellow 150 with salt mixture of kalium azoic barbiturate and natrium azoic barbiturate
  • Method for preparing pigment yellow 150 with salt mixture of kalium azoic barbiturate and natrium azoic barbiturate

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Experimental program
Comparison scheme
Effect test

Embodiment

[0029] 1. Prepare potassium and sodium azobarbiturate mixed salt with aminoguanidine carbonate, and then prepare nickel barbiturate complex pigment; then apply the present invention to prepare Pigment Yellow 150.

example 1

[0030] Example 1: The molar ratio of sodium nitrite to potassium nitrite is 8:2

[0031] (1) Dissolve 40 grams of aminoguanidine carbonate in 240 grams of distilled water and stir for 10 minutes.

[0032] (2) Slowly add 82 grams of 31% hydrochloric acid and stir for 5 minutes.

[0033] (3) Cool the system to -10°C with 280 grams of ice, slowly add a mixed solution of sodium nitrite and potassium nitrite dropwise within one hour (16.39 grams of sodium nitrite and 5.05 grams of potassium nitrite are dissolved in 45 grams of distilled water ), kept at 15°C for 15 minutes, and a small amount of sulfamic acid was added to remove excess nitrite ions.

[0034] (4) Add 79.1 grams of barbituric acid and stir for two hours.

[0035] (5) Adjust the pH value of the system to 2.5 with 25% potassium hydroxide solution, and stir for 30 minutes.

[0036] (6) Adjust the pH value of the system to 4.8 with 25% potassium hydroxide solution, and stir for 30 minutes.

[0037] (7) Raise the temp...

example 2

[0040] Example 2: The molar ratio of sodium nitrite to potassium nitrite is 7:3

[0041] (1) Dissolve 40 grams of aminoguanidine carbonate in 240 grams of distilled water and stir for 10 minutes.

[0042] (2) Slowly add 82 grams of 31% hydrochloric acid and stir for 5 minutes.

[0043] (3) Cool the system to -10°C with 280 grams of ice, and slowly add a mixed solution of sodium nitrite and potassium nitrite (14.35 grams of sodium nitrite and 7.57 grams of potassium nitrite dissolved in 45 grams of distilled water) within one hour. ), kept at 15°C for 15 minutes, and a small amount of sulfamic acid was added to remove excess nitrite ions.

[0044] (4) Add 79.1 grams of barbituric acid and stir for two hours.

[0045] (5) Adjust the pH value of the system to 2.5 with 25% potassium hydroxide solution, and stir for 30 minutes.

[0046] (6) Adjust the pH value of the system to 4.8 with 25% potassium hydroxide solution, and stir for 30 minutes.

[0047] (7) Raise the temperature...

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Abstract

The invention provides a method for preparing pigment yellow 150 with a salt mixture of kalium azoic barbiturate and natrium azoic barbiturate. The invention aims at providing the method for preparing nickel azoic barbiturate complex dye, namely, the pigment yellow 150. The method comprises the following steps: 1. aminoguanidine carbonate is used for preparing the salt mixture of the kalium azoic barbiturate and the natrium azoic barbiturate; and 2. p toluene sulfonyl hydrazine is used for preparing the salt mixture of the kalium azoic barbiturate and the natrium azoic barbiturate so as to prepare the nickel azoic barbiturate complex dye. The invention is characterized in that the pigment yellow 150 is again prepared by the orange red powdered salt mixture of the kalium azoic barbiturate and the natrium azoic barbiturate with the following steps: adding in distilled water, stirring, heating up, slowly adding nickelous chloride solution, adding melamine, stirring, adjusting the pH value of the system with potassium hydroxide solution; washing by means of suction filtration, drying and obtaining finished products. The nickel azoic barbiturate complex dye has good transparency, liquidity and color intensity, and is suitable for the fields such as printing ink, color filter, etc.

Description

technical field [0001] The invention relates to a manufacturing method of a nickel azobarbiturate complex pigment, that is, pigment yellow 150. Background technique [0002] In various ink compositions, pigments exhibiting high tinting strength and high transparency are generally composed of very fine particles. Pigment particle size distribution often affects many properties of pigments. For pigments used in ink and other directions, it is usually required to have a small particle size to obtain properties such as high transparency, high tinting strength, and good gloss, but at the same time it will also cause its fluidity, weather resistance, and solvent resistance. change. Generally, the weather resistance and solvent resistance are mainly determined by the chemical structure and particle shape of the pigment itself. According to EP-A-297397, azobarbituric acid monopotassium salt with chemical formula (1) was prepared by using formamidine azoacetate as an azo component...

Claims

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Application Information

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IPC IPC(8): C09B45/22
Inventor 王忻刘海涛罗朝晖刘朝辉
Owner XIANGTAN JIALI TECH
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