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Light resistant, mono azo organic yellow pigment and method for preparing the same

A technology of yellow monoazo and organic pigments, which is applied in the preparation of light-resistant oxidation yellow monoazo organic pigments, and in the field of light-resistant oxidation yellow monoazo organic pigments, which can solve the comprehensive performance of unusable, light-resistant, heat-resistant, and migration-resistant Bad question

Inactive Publication Date: 2008-02-27
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary azo pigments have simple production process, low cost, and large dosage, but their comprehensive properties such as light fastness, heat resistance, and migration resistance are relatively poor. second occasion
It cannot be used in outdoor advertising, automotive paint and high-end inkjet printing inks, etc., which require high light resistance of organic pigments.

Method used

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  • Light resistant, mono azo organic yellow pigment and method for preparing the same
  • Light resistant, mono azo organic yellow pigment and method for preparing the same
  • Light resistant, mono azo organic yellow pigment and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Synthesis of photofast oxidation yellow monoazo organic pigment A:

[0015] (1) 4-(4-aminobenzoate group)-2,2,6,6-tetramethylpiperidine diazotization:

[0016] Dissolve 0.01 mol of 4-4-aminobenzoate-2,2,6,6-tetramethylpiperidine in 50 ml of water and 3.5 ml of 30% hydrochloric acid. Cool to 0°C in an ice-water bath. Cool 2.5ml of sodium nitrite solution with a concentration of 4mol / L to 0°C in advance with an ice bath, and quickly add it to the reaction solution under stirring, keep the temperature at 0-5°C, and react for 1-2 hours. During the reaction, the solution was slightly blue to Congo red test paper, and slightly blue to starch potassium iodide test paper. The reaction formula is as follows:

[0017]

[0018] After the reaction, the diazonium solution is clear and transparent, and urea is added to decompose the excess sodium nitrite until the reaction solution does not change color on the starch potassium iodide test paper, and the diazonium salt solution ...

specific Embodiment approach 2

[0024] Synthesis of photofast oxidation yellow monoazo organic pigment B:

[0025] (1) Diazotization of 4-(4-aminobenzoate)-2,2,6,6-tetramethylpiperidine: same as in Embodiment 1.

[0026] (2) Synthesis of light-resistant oxidation yellow azo organic pigment:

[0027] Add 200ml of water and 0.01mole o-chloroacetoacetanilide in a 500ml beaker, adjust the pH value to 8.5-9.0 with 30% sodium hydroxide solution and stir to completely dissolve the o-chloroacetoacetanilide, filter to remove inorganic impurities, and cool to Below 5°C, uniformly add the diazonium salt solution prepared above into the reaction solution within 10-15min, adjust the pH value to 8.0-8.5 after adding, keep the temperature at 5-10°C for full reaction, and use β- The naphthol permeation ring method was used to detect the reaction end point until the diazonium salt disappeared completely, and the reaction ended. The reaction formula is as follows:

[0028]

[0029] (3) Pigmentation:

[0030] Add an app...

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PUM

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Abstract

The disclosed preparation method for the photooxidation-resistant yellow monoazo organic pigment contained hindered group with general formula as R1-N=N-R2 (R1 for 1-R3-4- benzoate-2, 2, 6, 6-tetramethyl piperidine, or 1-R3-4-benzamino-2, 2, 6, 6-tetramethyl piperidine; R3 for H or alkyl; R2 for coupling constituent) comprises: adding NaNO2 solution into the diazo component for diazotization; then, adding coupling constituent for coupling reaction; finally, adding sodium rosinate solutin and proper BaCl2 to obtain the target. This product has well comprehensive property, and has wide application for high light resistance request.

Description

technical field [0001] The invention relates to an organic pigment, in particular to a light-resistant oxidation yellow monoazo organic pigment, and further relates to a preparation method of a light-resistant oxidation yellow monoazo organic pigment. Background technique [0002] As we all know, my country's organic pigment production technology is relatively backward compared with developed countries. It mainly produces ordinary azo pigments, while high-grade organic pigments mainly rely on imports. Ordinary azo pigments have simple production process, low cost, and large dosage, but their comprehensive properties such as light fastness, heat resistance, and migration resistance are relatively poor. second occasion. It cannot be used in outdoor advertising, automotive paint and high-grade inkjet printing inks, etc., which require high light resistance of organic pigments. Contents of the invention [0003] The purpose of the present invention is to provide a light-resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/036
Inventor 张晓东刘馨孙德帅
Owner QINGDAO UNIV