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Pigment yellow 138 easy to disperse in weak solvent and preparation method thereof

A pigment yellow and easy to disperse technology, applied in the field of pigments, can solve the problems of coating or printing difficulties, insufficient pigment color development, precipitation and agglomeration, etc., to reduce the formation of secondary aggregates, improve vividness, and particle size uniform effect

Pending Publication Date: 2021-10-01
WEIFANG TAIXING BIOCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the difficulty in dispersing traditional pigment toners, pigments are usually added to resins and polar solvents for co-grinding, and resins are used as carriers in combination with coated or printed materials. Due to the variety of resins, large Most weak solvents have poor compatibility with resins. Therefore, the coatings and inks made of pigments will often have precipitation and agglomeration after long-term storage, and there will also be problems such as decreased coloring power and insufficient color development of pigments. The coating or printing of the

Method used

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  • Pigment yellow 138 easy to disperse in weak solvent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method for easily dispersible pigment yellow 138 in an environment-friendly polar solvent, comprising the following steps:

[0028] 1) Preparation of crude pigment yellow 138: put 3300kg of o-dichlorobenzene into the enamel reaction kettle, and then, at a speed of 130r / min, put in 412.5kg of tetrachlorophthalic anhydride, 50kg of zinc chloride and 8-aminoquinaldine in sequence 100kg, fill with nitrogen, slowly raise the temperature to 80°C, keep it warm for 1 hour, then raise the temperature to 180-200°C and keep it warm for 6 hours to get the crude pigment yellow 138 mixture; put the obtained pigment yellow 138 crude mixture into the vacuum paddle for drying In the machine, between 120-140°C, the vacuum degree is -0.08MPa to -0.1MPa to recover the solvent, and the crude product of Pigment Yellow 138 is obtained, and the quality of the crude product of Pigment Yellow 138 is 330kg;

[0029] 2) Preparation of Pigment Yellow 138 fine product: Add 3000kg of ac...

Embodiment 2

[0032] The difference between Example 2 and Example 1 is that in step 1) of Example 2, tin tetrachloride is used as the catalyst, and the mass of tin tetrachloride is 50 kg. The settings of other preparation process conditions are the same as those in Example 1.

Embodiment 3

[0034] The difference between Example 3 and Example 1 is that in step 1) of Example 3, the catalyst is anhydrous aluminum trichloride, and the mass of anhydrous aluminum trichloride is 50 kg. The settings of other preparation process conditions are the same as those in Example 1.

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Abstract

The invention discloses pigment yellow 138 easy to disperse in a weak solvent and a preparation method of the pigment yellow 138. The method comprises the following steps: 1) preparation of a pigment yellow 138 crude product: carrying out condensation reaction on o-dichlorobenzene, tetrachlorophthalic anhydride, a catalyst and 100kg of 8-aminoquinaldine under the protection of nitrogen to obtain a pigment yellow 138 crude product mixed solution; and performing vacuum drying on the pigment yellow 138 crude product mixed solution to obtain the pigment yellow 138 crude product; 2) preparation of a pigment yellow 138 fine product: carrying out an acid dissolution reaction on the pigment yellow 138 crude product and acetic acid to obtain a pigment yellow 138 fine product mixed solution; and diluting the high-quality pigment yellow 138 mixed solution, and carrying out suction filtration to obtain a high-quality pigment yellow 138 filter cake; and 3) preparation of the pigment yellow 138 product easy to disperse: carrying out pigment surface wrapping treatment on the refined filter cake of the pigment yellow 138 by using water and an auxiliary agent to obtain a pigment yellow 138 material easy to disperse , and drying the material to obtain the spherical easily-dispersible pigment yellow 138 product.

Description

technical field [0001] The invention relates to the technical field of pigments, in particular to an easily dispersible pigment yellow 138 in a weak solvent and a preparation method thereof. Background technique [0002] Due to the difficulty in dispersing traditional pigment toners, pigments are usually added to resins and polar solvents for co-grinding, and resins are used as carriers in combination with coated materials or printed materials. Due to the variety of resins, large Most weak solvents have poor compatibility with resins. Therefore, the coatings and inks made of pigments will often have precipitation and agglomeration after long-term storage, and there will also be problems such as decreased tinting power and insufficient color development of pigments, which will cause problems in the later stage. Coating or printing caused great difficulties. For this reason, the applicant has developed an easily dispersible pigment that is easily dispersed in a weak solvent. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B25/00C09B67/20C09B67/38
CPCC09B25/00C09B67/008C09B67/006
Inventor 杨启邦刘建胜单鲁凯朱志强
Owner WEIFANG TAIXING BIOCHEM CO LTD
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