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Preparation method of modified azo yellow pigment derivative dispersant as well as prepared derivative dispersant and application thereof

A technology for yellow pigments and derivatives, applied in the field of pigments, can solve problems such as poor storage stability, poor compatibility, and whitening, and achieve the effects of reducing whitening and blooming, increasing storage stability, and reducing viscosity.

Active Publication Date: 2011-02-02
WINBOS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, the physical and chemical properties of azo pigments and titanium dioxide pigments are very different. They have poor compatibility, high viscosity when mixed, and poor storage stability. When used, it is easy to mix the two in inks and coatings at the same time. Blooming and whitening occur

Method used

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  • Preparation method of modified azo yellow pigment derivative dispersant as well as prepared derivative dispersant and application thereof
  • Preparation method of modified azo yellow pigment derivative dispersant as well as prepared derivative dispersant and application thereof
  • Preparation method of modified azo yellow pigment derivative dispersant as well as prepared derivative dispersant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Synthesis of 4-acetoacetamidophenylphosphonate: Dissolve 1mol of 4-aminophenylphosphonic acid in 1000mL of water, add 1mol of solid sodium hydroxide, and add 1mol of diketene dropwise at a temperature of 5°C. , under normal pressure, stirred and reacted for 30 minutes, concentrated and dried to obtain 4-acetoacetamidophenylphosphonic acid sodium salt.

[0030] (2) Preparation of diazo solution: in 150mL water, add 30wt% hydrochloric acid solution (Hcl0.5mol in hydrochloric acid), start stirring, add 3,3-dichlorobenzidine 0.1mol, stir for 30 minutes, at a temperature of At 0°C, quickly add 8 wt% solution made of 0.205 mol of sodium nitrite, carry out diazotization reaction for 1 hour, starch potassium iodide test paper turns blue, and filter to obtain diazonium solution.

[0031] (3) Preparation of coupling solution: in 650mL water, add 30wt% sodium hydroxide solution (sodium hydroxide 0.45mol in sodium hydroxide), stir, add acetoacetanilide 0.105mol, and step (1) ob...

Embodiment 2

[0035] (1) Synthesis of 4-acetoacetamidophenylphosphonate: Dissolve 2mol 4-aminophenylphosphonic acid in 2000mL water, add 2mol solid potassium hydroxide, when the temperature is 2°C, add 2.1mol diketene dropwise, at 105 ℃, under normal pressure, stirred and reacted for 40 minutes, concentrated and dried to obtain 4-acetoacetamidophenylphosphonic acid potassium salt.

[0036] (2) Preparation of diazo solution: in 300mL water, add 30wt% hydrochloric acid solution (Hcl0.95mol in hydrochloric acid), start stirring, add 3,3-dichlorobenzidine 0.2mol, stir for 20 minutes, at a temperature of At -2°C, quickly add a 10wt% solution made of 0.4 mol potassium nitrite, carry out diazotization reaction for 1 hour, starch potassium iodide test paper turns blue, and filter to obtain diazonium solution.

[0037] (3) Preparation of coupling solution: in 1300mL water, add 30wt% potassium hydroxide solution (0.9mol of potassium hydroxide in potassium hydroxide solution), stir, add acetoacetanili...

Embodiment 3

[0041] (1) Synthesis of 4-acetoacetamidophenylphosphonate: Dissolve 1mol of 4-aminophenylphosphonic acid in 1000mL of water, add 1mol of sodium hydroxide, and add 1.1mol of diketene dropwise at a temperature of 0°C. , under normal pressure, stirred and reacted for 40 minutes, concentrated and dried to obtain 4-acetoacetamidophenylphosphate sodium salt.

[0042] (2) Preparation of diazo solution: in 150mL water, add 30wt% hydrochloric acid solution (Hcl0.45mol in hydrochloric acid), start stirring, add 3,3-dichlorobenzidine 0.1mol, stir for 25 minutes, at a temperature of At -5°C, quickly add a 10wt% solution made of 0.21 mol of sodium nitrite, carry out diazotization reaction for 1 hour, starch potassium iodide test paper turns blue, and filter to obtain diazonium solution.

[0043](3) Preparation of coupling liquid: in 650mL water, add 30wt% sodium hydroxide solution (sodium hydroxide 0.42mol in sodium hydroxide), start stirring, add acetoacetanilide 0.11mol, and step (1) obt...

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Abstract

The invention discloses a preparation method of a modified azo yellow pigment derivative dispersant as well as a prepared derivative dispersant and application thereof. The preparation method comprises the following steps of: (1) dissolving 4-aminobenzene phosphonic acid into water, adding alkali and ketene dimer, and stirring, reacting and drying to obtain 4-acetoacetyl aminobenzene phosphonate; (2) adding 3,3-dichlorobenzidine into a hydrochloric acid solution, stirring, adding a nitrite solution and reacting to obtain a diazonium solution; (3) under a stirring state, adding acetoacetanilide and the 4-acetoacetyl aminobenzene phosphonate into an alkali solution, and dropping an acetic acid solution to obtain a coupling solution; (4) adding the diazonium solution into the coupling solution and coupling to obtain azo yellow pigment derivative color paste; and (5) adding fatty amine into the azo yellow pigment derivative color paste, and stirring, filtering, washing by water and drying to obtain a modified azo yellow pigment derivative dispersant product. When the dispersant is used, the added quantity of the dispersant occupies 5-15 weight percent of the quantity of azo yellow pigment.

Description

technical field [0001] The invention relates to the technical field of pigments, in particular to a preparation method of a modified azo yellow pigment derivative dispersant, the prepared derivative dispersant and its application. Background technique [0002] As we all know, the physical and chemical properties of azo pigments and titanium dioxide pigments are very different. They have poor compatibility, high viscosity when mixed, and poor storage stability. When used, it is easy to mix the two in inks and coatings at the same time. Flooding and whitening occur. This problem has become one of the difficult problems in the ink industry. Through the synthesis and application tests of pigments, the present inventor has surprisingly found that a kind of azo yellow pigment derivative dispersant produced by part of 4-acetoacetamidophenylphosphonic acid instead of acetoacetamidobenzene as coupling component is added to ink Among them, the titanium dioxide pigment and azo yellow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D11/10C09D11/037
Inventor 郑中立黄华斌
Owner WINBOS NEW MATERIALS
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