Preparation method of permanent orange pigment

A technology of permanent orange and pigment, applied in the field of coatings, can solve the problems of poor fluidity, poor application characteristics of anti-emulsification, poor viscosity and so on

Inactive Publication Date: 2019-04-09
宣城英特颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, there are great deficiencies in the use of pigments in printing ink, rubber, and stationery, such as poor viscosity, poor fluidity, and poor emulsification resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Present embodiment is a kind of preparation method of permanent orange pigment, comprises the following steps:

[0021] (1) In parts by weight, put 0.5 parts of hydrochloric acid with a mass fraction of 25% and 8 parts of 3,3-dichlorobenzidine into a container with an appropriate amount of water in sequence. For 85 minutes, dilute and cool down to -2°C, add 2.5 parts of sodium nitrite, and immediately use potassium iodide test paper to check whether the pH value of the system is strongly acidic. The potassium iodide test paper should be blue to slightly blue (if the system is not acidic enough, immediately add hydrochloric acid or sodium nitrite), carry out diazonium reaction; stir for about 90 minutes, turn on the circulation pump after 50 minutes, and circulate for 30 minutes. After completion, slowly add sulfamic acid until the potassium iodide test paper is micro-blue, add sulfamic acid to adjust the pH value of the solution, use potassium iodide test paper to detec...

Embodiment 2

[0026] Present embodiment is a kind of preparation method of permanent orange pigment, comprises the following steps:

[0027] (1) In parts by weight, add 3 parts of hydrochloric acid with a mass fraction of 29% and 14 parts of 3,3-dichlorobenzidine into a container with an appropriate amount of water and mix in sequence. The order of addition cannot be reversed, and beating is carried out. The time is 92 minutes, dilute and cool down to 0°C, add 3.6 parts of sodium nitrite, and immediately use potassium iodide test paper to check whether the pH value of the system is strongly acidic, the potassium iodide test paper should be blue to slightly blue (if the system is not acidic enough, add hydrochloric acid immediately or sodium nitrite), carry out diazonium reaction; stir for about 90 minutes, turn on the circulation pump after 60 minutes, and circulate for 30 minutes. After completion, slowly add sulfamic acid until the potassium iodide test paper is micro-blue, add sulfamic a...

Embodiment 3

[0032] Be a kind of preparation method of permanent orange pigment, comprise the following steps:

[0033] (1) In parts by weight, add 2 parts of hydrochloric acid with a mass fraction of 26% and 12 parts of 3,3-dichlorobenzidine into a container with an appropriate amount of water and mix them. The order of addition cannot be reversed, and beating is performed. The time is 90 minutes, dilute and cool down to -1°C, add 3 parts of sodium nitrite, and immediately use potassium iodide test paper to test whether the pH value of the system is strongly acidic. Hydrochloric acid or sodium nitrate), carry out diazonium reaction; stir for about 90 minutes, turn on the circulation pump after 55 minutes, and circulate for 30 minutes. After the reaction is completed, slowly add sulfamic acid to the microblue of the potassium iodide test paper, add sulfamic acid to adjust the pH value of the solution, use the potassium iodide test paper to detect that the solution can be microscopically bl...

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PUM

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Abstract

The invention provides a preparation method of permanent orange pigment and relates to the technical field of coating. The preparation method comprises the following steps: (1) sequentially adding thecomponents in parts by weight: 0.5 to 3 parts of hydrochloric acid and 8 to 14 parts of 3,3-dichlorobenzidine; pulping, diluting an cooling; adding 2.5 to 3.6 parts of sodium nitrite and carrying outdiazotization reaction; adding sulfamic acid to obtain a diazonium solution; (2) mixing 6 to 8 parts of 1,3,5-pyrazolone in parts by weight and 0.8 to 1.2 parts of an emulsifier in parts by weight and pulping to obtain a coupling solution; (3) mixing 2 to 6 parts of liquid alkali by weight and 2 to 3 parts of rosin by weight, so as to obtain a rosin solution; (4) synthesizing; adding the couplingsolution into the diazonium solution and carrying out coupling reaction, wherein the reaction temperature is 12 to 18 DEG C; then adding the rosin solution and mixing; and adding 3 to 4 parts of a dispersant to obtain the permanent orange pigment. According to the preparation method provided by the invention, a second component is introduced so that an aggregation effect of particles is reduced;in a utilization process, a system has good dispersity and the particles are not easy to aggregate; and the softnesss of the particles is increased and the pigment has good flowability in the utilization process.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of permanent orange pigment. Background technique [0002] Pigment for ink refers to the raw material that makes ink color, which is insoluble in water and has excellent alcohol resistance. Pigments are colored organic or inorganic colored compounds that are insoluble in water and general organic solvents, but not all colored substances can be used as organic pigments. To become pigments, colored substances must have the following properties: [0003] (1) The color is bright, which can give the colored object (or substrate) a firm color; [0004] (2) Insoluble in water, organic solvents or application media; [0005] (3) It is easy to disperse uniformly in the application, and is not affected by the physical and chemical effects of the application medium during the entire dispersion process, and retains their own inherent crystal structure; [0006] (4) S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/22C09B67/46C09B29/01C09B29/50C09D11/037
Inventor 余锡水丁义春
Owner 宣城英特颜料有限公司
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