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Method for preparing high-performance organic pigment PR176

A PR176, organic pigment technology, applied in organic dyes, chemical instruments and methods, azo dyes, etc., can solve problems such as environmental pollution and increase the cost of pigments, and achieve the effect of reducing costs, reducing energy consumption, and high tinting strength

Inactive Publication Date: 2011-01-26
姚涌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, due to the use of a large amount of toxic and harmful organic solvents, the production process will not only cause serious pollution to the environment, but also increase the cost of pigments due to the need to recycle the organic solvents

Method used

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  • Method for preparing high-performance organic pigment PR176

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Take 22g of 3-amino-4-methoxybenzanilide, add 300ml of deionized water, add 15ml of HCl (30%) after dispersion, cool to 0°C, add NaNO dropwise 2 to a slight excess. After stirring for half an hour, add urea to remove excess NaNO 2 , add 5% activated carbon for decolorization for 1 hour, filter, and refrigerate the filtrate for later use.

[0023] Take naphthol ASBI 30g, add 500ml deionized water, add OP-40.3g, add NaOH 25g to dissolve after dispersion, then add 5% activated carbon for decolorization and filter to obtain the coupling component solution. Take 1.5g of OP-4 and add it to the prepared buffer solution (300ml) to adjust the pH to 6.0 and the temperature to 20°C.

[0024] Within 3 hours, add the mixed diazonium salt and the coupling component solution to the buffer solution at the same time, continue to stir for 1 hour, raise the temperature to 95°C, keep warm for 2 hours, filter, and fully wash with deionized water to obtain a crude pigment.

[0025] Disper...

example 2

[0027] Take 22g of 3-amino-4-methoxybenzanilide, add 300ml of deionized water, add 15ml of HCl (30%) after dispersion, cool to 0°C, add NaNO dropwise 2 to a slight excess. After stirring for half an hour, add urea to remove excess NaNO 2 , add 5% activated carbon for decolorization for 1 hour, filter, and refrigerate the filtrate for later use.

[0028] Take naphthol ASBI 30g, add 500ml of deionized water, add 0.3g of Pingpingjia, add NaOH 25g to dissolve after dispersion, then add 5% activated carbon for decolorization and filter to obtain the coupling component solution.

[0029] Take 1.5g of SPAN-60 and add it to the prepared buffer solution (300ml), adjust the pH to 6.0 and the temperature to 25°C.

[0030] Within 3 hours, add the mixed diazonium salt and the coupling component solution to the buffer solution at the same time, continue to stir for 1 hour, raise the temperature to 95°C, keep warm for 2 hours, filter, and fully wash with deionized water to obtain a crude p...

example 3

[0033] Take 22g of 3-amino-4-methoxybenzanilide, add 300ml of deionized water, add 15ml of HCl (30%) after dispersion, cool to 0°C, add NaNO dropwise 2 to a slight excess. After stirring for half an hour, add urea to remove excess NaNO 2 , add 5% activated carbon for decolorization for 1 hour, filter, and refrigerate the filtrate for later use.

[0034] Take naphthol ASBI 30g, add 500ml deionized water, add SPAN-600.3g, after dispersion, add NaOH 25g to dissolve, then add 5% activated carbon to decolorize and filter to obtain the coupling component solution.

[0035] Take 1.5g of SPAN-60 and add it to the prepared buffer solution (300ml), adjust the pH to 6.0 and the temperature to 25°C.

[0036] Within 4 hours, add the mixed diazonium salt and the coupling component solution into the buffer solution at the same time, continue to stir for 1 hour, raise the temperature to 95°C, keep warm for 3 hours, filter, and fully wash with deionized water to obtain a crude pigment.

[0...

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Abstract

The invention discloses a method for preparing a high-performance organic pigment PR176, which comprises the following steps of: (1) performing diazotization reaction on 3-amino-4-methoxy benzanilide through a conventional method to prepare solution of diazonium salt thereof; (2) mixing a coupling component, namely azoic coupling component ASBI and water, adding sodium hydroxide for dissolution, adding a surfactant in the process, changing the surface activity, wherein the surfactant is 1 to 2 percent based on the mass of the azoic coupling component ASBI, and adding a proper amount of activated carbon, decoloring for half a hour and filtering undissolved substance thereof, wherein the filter liquor is coupling solution; (3) performing coupling reaction on the diazonium salt and the coupling solution, and simultaneously adding the diazonium salt and the dissolved coupling component into buffer solution by adopting a parallel flow coupling method; and (4) adding the prepared crude pigment into water, dispersing, adding a surfactant in an amount which is 4 to 10 percent based on the mass of the pigment, raising the temperature to between 50 and 180 DEG C, keeping the temperature for 1 to 10 hours, performing filter pressing, washing, drying and crushing to prepare the finished pigment.

Description

technical field [0001] The invention relates to a preparation method of a pigment, in particular to a preparation method of a high-performance organic pigment PR176. Background technique [0002] Benzimidazolone organic pigments belong to azo pigments, and its structural formula is: [0003] [0004] Benzimidazolone pigments belong to the series of high-grade organic pigments, which have the characteristics of bright color, simple production process, excellent application performance and high coloring strength. Because the benzimidazolone containing cyclic amide groups in the pigment molecule changes the aggregation form of the molecule through the hydrogen bond formed between the adjacent molecules, so that the pigment has a higher melting point, which can significantly reduce the solubility in the solvent. It has excellent light and weather fastness, solvent resistance, migration resistance, and heat stability. [0005] The main raw materials for its preparation are 3...

Claims

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Application Information

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IPC IPC(8): C09B29/20C09B67/48C09B67/36
Inventor 姚涌
Owner 姚涌
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