Preparation of yellow pigment for liquid printing ink

A technology for yellow pigment and ink, applied in the field of preparation of liquid ink yellow pigment, can solve the problems of solvent resistance, poor light-fast storage stability, poor storage stability, etc., to improve product quality, increase storage stability, viscosity low effect

Inactive Publication Date: 2008-11-12
TIANJIN TOYO INK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pigment Yellow 14 is mainly used in liquid ink, but its solvent resistance, light fastness and storage stability are relatively poor in polyurethane system and acrylic system, especially the storage stability is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add 1kg of 3.3' dichlorobenzidine to 5.3kg of 30% hydrochloric acid aqueous solution, and disperse for 1 hour; add 75kg of ice water to cool down to -5-0°C, diazotize with 2kg of 40% sodium nitrite, and ensure potassium iodide starch at the end point The test paper is dark blue; add 0.1-0.3kg of sulfamic acid until the potassium iodide starch test paper is colorless, set aside;

[0020] (2) Take 2kg of o-methylacetoacetanilide and 0.1kg of the second coupling component and dissolve them in 6kg of 40% sodium hydroxide aqueous solution at a temperature of 20-32°C, dissolve transparently, adjust the temperature to 8-10°C for acid analysis; That is, add 100kg of water and 3kg of acetic acid into the acetic acid dilution tank, stir evenly, and carry out acid analysis slowly to obtain the coupling component;

[0021] (3) At pH=6.0-6.5 and temperature 10-15°C, add diazonium solution to the coupling components for 120-150 minutes until the coupling is complete, add 0.01-0.0...

Embodiment 2

[0025] (1) Add 1kg of 3.3' dichlorobenzidine to 5.3kg of 30% hydrochloric acid aqueous solution, and disperse for 1 hour; add 75kg of ice water to cool down to -5-0°C, diazotize with 2kg of 40% sodium nitrite, and ensure potassium iodide at the end point The starch test paper is dark blue; add 0.1-0.3kg of sulfamic acid until the potassium iodide starch test paper is colorless, set aside;

[0026] (2) Dissolve 2kg of o-methyl acetoacetanilide and 0.3kg of the second group of coupling components in 6kg of 40% sodium hydroxide aqueous solution at a temperature of 20-32°C, dissolve transparently, adjust the temperature to 8-10°C for acid analysis ; That is, add 100kg of water and 3kg of acetic acid in the acetic acid dilution tank, stir evenly, and slowly carry out acid analysis to obtain the coupling component;

[0027] (3) At pH=6.0-6.5 and temperature 10-15°C, add diazonium solution to the coupling components for 120-150 minutes until the coupling is complete, add 0.01-0.05kg ...

Embodiment 3

[0030] (1) Take 1kg of 3.3'dichlorobenzidine and add it to 5.3kg of 30% hydrochloric acid aqueous solution, and disperse for 1 hour; add 75kg of ice water to cool down to -5-0°C, and diazotize with 2kg of 40% sodium nitrite to ensure potassium iodide The starch test paper is dark blue; add 0.1-0.3kg of sulfamic acid until the potassium iodide starch test paper is colorless, set aside;

[0031] (2) Take 2kg of o-methyl acetoacetanilide and 0.3kg of the second group of coupling components and dissolve them together in 6kg of 40% sodium hydroxide aqueous solution at a temperature of 20-32°C, dissolve transparently, adjust the temperature to 8-10°C for acid analysis; That is, add 100kg of water and 3kg of acetic acid into the acetic acid dilution tank, stir evenly, and slowly conduct acid analysis to obtain the coupling component, add 0.01-0.05kg of surfactant and stir;

[0032] (3) At pH=6.0-6.5 and temperature 10-15°C, add diazo solution to the coupling components for 120-150 mi...

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PUM

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Abstract

The invention relates to a method for preparing a yellow pigment for liquid ink. The method comprises the following steps of : (1), adding one portion of 3.3'dichloro benzidine di hydrochloride into 5.3 portions of thirty percent of aqueous hydrochloric acid solution to disperse for one hour; adding 75 portions of ice water to cool to minus five to zero DEG C, using 2 portions of forty percent of sodium nitrite for diazotization and the terminating potassium iodide starch test paper shows dark blue; adding 0.1 to 0.3 portion of sulfamic acid until the potassium iodide starch test paper shows colorless for later use; (2), dissolving 2 portions of AAOT and 0.1 to 0.3 portion of second coupling component together in 6 portions of forty percent of Oxyhydrogen sodium solution under the temperature between twenty to thirty-two DEG C until the solution is transparent and adjusting the temperature to between eight and ten DEG C to acid out, that is, adding one hundred portions of water and three portions of acetic acid into an acetic acid thinning tank and stirring evenly to acid out slowly and obtain a coupling component; (3), adding diazo liquid into the coupling component about one hundred and twenty minutes to one hundred and fifty minutes when the PH value is between six and six point five and the temperature is between ten and fifteen DEG C until the complete coupling, then adding 0.01 to 0.05 portion of surface active agent and stirring; heating to eighty to ninety DEG C and preserving the heat for one to two hours, filtering and conducting pigmentation treatment on a filter mass. The method is simple in technology and remarkable in effect.

Description

technical field [0001] The invention relates to a preparation method of an ink pigment, in particular to a preparation method of a liquid ink yellow pigment. Background technique [0002] In recent years, domestic pigment workers have conducted extensive research on pigments for offset printing inks, but relatively less research work has been done on pigments for liquid inks. With the development of my country's printing, packaging and decoration industry, plastic packaging products are increasing. The demand for liquid ink is increasing. For pigments, the application fields are different, and the effects obtained are completely different. Therefore, ink users now have higher and higher requirements for the application performance of pigments in different fields. Pigment Yellow 14 is mainly used in liquid ink, but its solvent resistance, light fastness and storage stability are relatively poor in polyurethane system and acrylic system, especially the storage stability is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/36C09D11/02C09D11/037
Inventor 崔莉曹克全刘霞闫怡胡兆华
Owner TIANJIN TOYO INK
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