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Preparation method of pigment yellow 150

A technology for pigment yellow and pigment slurry, which is applied in the field of preparation of pigment yellow 150, can solve the problems affecting the transparency, fluidity and color strength of products, unstable product quality performance, poor quality repeatability, etc., so as to improve application performance, dispersion Excellent stability, low viscosity effect

Active Publication Date: 2019-05-17
宇虹颜料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the problem of poor quality repeatability in the industrial production process, especially under the conditions of industrial scale production, the quality and performance of each batch of products are unstable.
Pigment Yellow 150 prepared by this process has high viscosity and poor dispersion, which further affects the transparency, fluidity and coloring strength of the product.

Method used

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  • Preparation method of pigment yellow 150
  • Preparation method of pigment yellow 150
  • Preparation method of pigment yellow 150

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] One, the preparation of azobarbituric acid sodium salt

[0045] (1) Preparation of diazo solution

[0046] Add 85ml of water to a 500mL beaker, add 9.23g of aminoguanidine bicarbonate, stir for 30min, and slowly add 19.6g of hydrochloric acid (30%) under stirring for 10min. Add ice and cool down to 0°C. After adding 4.96g of sodium nitrite (96%) into 12.5ml of water to dissolve clearly, it was added to the above reaction and stirred for 20min.

[0047] (2) Coupling reaction

[0048] Add 17.52g of barbituric acid and 0.2g of thiobarbituric acid into the diazonium solution in 10 minutes, and stir for 30 minutes to obtain a pigment slurry.

[0049] (3) post-processing

[0050] Raise the temperature of the pigment slurry to 50°C and keep it warm for 1.5h. 2.05 g of sodium acetate was added, and the pH was adjusted to 4.6 with 50% sodium hydroxide solution. The reactant was stirred at 50° C. for 1 hour, then heated to 100° C., and kept for 4 hours. Cool the reactant to...

Embodiment 2

[0054] One, the preparation of azobarbituric acid sodium salt

[0055] (1) Preparation of diazo solution

[0056] Add 85ml of water to a 500mL beaker, add 9.23g of aminoguanidine bicarbonate, stir for 30min, and slowly add 19.6g of hydrochloric acid (30%) under stirring for 10min. Add ice and cool down to 0°C. After adding 4.96g of sodium nitrite (96%) into 12.5ml of water to dissolve clearly, it was added to the above reaction and stirred for 20min.

[0057] (2) Coupling reaction

[0058] Add 17.35g of barbituric acid and 0.4g of thiobarbituric acid into the diazonium solution in 10 minutes, and stir for 30 minutes to obtain a pigment slurry.

[0059] (3) post-processing

[0060] Raise the temperature of the pigment slurry to 50°C and keep it warm for 1.5h. 2.05 g of sodium acetate was added, and the pH was adjusted to 4.6 with 50% sodium hydroxide solution. The reactant was stirred at 50° C. for 1 hour, then heated to 100° C., and kept for 4 hours. Cool the reactant to 7...

Embodiment 3

[0064] One, the preparation of azobarbituric acid sodium salt

[0065] (1) Preparation of diazo solution

[0066] Add 85ml of water to a 500mL beaker, add 9.23g of aminoguanidine bicarbonate, stir for 30min, and slowly add 19.6g of hydrochloric acid (30%) under stirring for 10min. Add ice and cool down to 0°C. After adding 4.96g of sodium nitrite (96%) into 12.5ml of water to dissolve clearly, it was added to the above reaction and stirred for 20min.

[0067] (2) Coupling reaction

[0068] Add 17.17g of barbituric acid and 0.6g of thiobarbituric acid into the diazonium solution in 10 minutes. After the addition is complete, stir for 30 minutes to obtain a pigment slurry.

[0069] (3) post-processing

[0070] Raise the temperature of the pigment slurry to 50°C and keep it warm for 1.5h. 2.05 g of sodium acetate was added, and the pH was adjusted to 4.6 with 50% sodium hydroxide solution. The reactant was stirred at 50° C. for 1 hour, then heated to 100° C., and kept for 4 ...

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Abstract

The invention provides a preparation method of pigment yellow 150. The method comprises the following steps: adding thiobarbituric acid in a reaction for synthesizing sodium azobarbiturate to substitute part of barbituric acid to complete a mixing and coupling process, taking the barbituric acid as a subject and taking the thiobarbituric acid as an object to prepare a solid solution pigment, and carrying out a complexation reaction through adopting a variety of metals including ferrous chloride tetrahydrate, zinc chloride and nickel chloride to prepare a mixed crystal product. When the pigmentyellow 150 prepared by the invention is applied to solvent ink, the pigment yellow 150 has the excellent properties of high hue saturation, high transparency, bright color, low viscosity and good dispersion stability.

Description

technical field [0001] The invention belongs to the field of organic pigment synthesis, in particular to a preparation method of Pigment Yellow 150. Background technique [0002] Pigment Yellow 150, also known as C.I. Pigment Yellow 150, is an azobarbituric acid pigment and a heterocyclic azo-nickel complex containing a pyrimidine ring. The structural formula is as follows: [0003] [0004] Pigment Yellow 150 is a dark neutral yellow color with excellent light fastness. Under 1 / 25 standard depth (SD), the light fastness of the paint sample can reach grade 7-8. It is mainly recommended for industrial coatings and printing ink coloring. The printing ink sample has good acid / alkali resistance and good tinting strength. [0005] Currently, C.I.'s steps for synthesizing Pigment Yellow 150 include: (1) Using aminoguanidine bicarbonate and barbituric acid as raw materials to first synthesize azobarbituric acid sodium salt as an intermediate. (2) Pigment Yellow 150 was prepare...

Claims

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Application Information

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IPC IPC(8): C09B45/22
Inventor 吕东军刘淑燕陈雪
Owner 宇虹颜料股份有限公司
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