Process for producing high-grade phthalocyanine green pigment

A production process, the technology of phthalocyanine green, is applied in the field of production technology of high-grade phthalocyanine green pigment, which can solve problems such as poor pigmentation effect, and achieve the effect of high brightness and high contrast.

Inactive Publication Date: 2010-11-10
LIWANG CHEM NANTONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vibration grinding also has the problem of poor pigmentation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. In a 500-liter vertical ball mill, fill 1 / 2 volume of steel balls with a diameter of 4-6mm. The inner wall of the ball mill and the steel ball indicate that it is required to be smooth to avoid sticking the material; add 15 kg of crude phthalocyanine green and 300 g of sodium sulfate, and grind for 4.5 hours at 400 rpm.

[0020] b. 100 grams of grinding material, add to a 1000ml three-necked flask, add 400 grams of water, 150 grams of xylene, 2 grams of alcohol-soluble rosin resin, stir and warm up to boiling temperature, reflux for 5 hours, and then distill and recover xylene; pump Wash with filtered water to wash out all the inorganic salts; dry at 80°C, then crush to obtain pigments.

[0021] The obtained phthalocyanine green pigment is suitable for coating or plastic.

Embodiment 2

[0023] Add 100 grams of the grinding material obtained according to Example 1a. into a 1000ml three-necked flask, add 400 grams of water, 150 grams of xylene, and 7.5 grams of phthalocyanine sulfonamide derivative, stir and raise the temperature to boiling temperature, reflux for 5 hours, then Distillation and recovery of xylene; suction filtration and water washing to wash out all the inorganic salts; drying at 80 degrees, and then crushing to obtain pigments.

[0024] The obtained phthalocyanine green pigment is used in paint or ink.

Embodiment 3

[0026] Add 100 grams of the grinding material obtained according to Example 1a. into a 1000ml three-necked flask, 45 grams of 84% phosphoric acid, and then add 4.5 grams of 50% rosin soap; stir for 1 hour, then stir to add the above grinding material, stir at room temperature for 14 hours , Then add 2000 grams of water, azeotropically distill out xylene, the temperature is up to 100 ℃; suction filter water to wash to neutral.

[0027] The obtained phthalocyanine green pigment is suitable for paints and plastics.

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Abstract

The invention discloses a process for producing a high-grade phthalocyanine green pigment. The process comprises the following steps of: grinding crude pigment; adding an organic salt grinding aid in the grinding process; then, treating the ground pregrinding pigment by a solvent; and separating the aggregated large particles again, and crystallizing for properly growth and repair. During solvent treatment, the pH is adjusted as required, and a surface active agent can be added to improve the dispersivity of the pigment in the oil paint and the applicability in the ink slurry; and the derivative of phthalocyanine can be added to improve the flocculation stability and the luster. Compared with the traditional phthalocyanine green pigment, the phthalocyanine green pigment component is greatly enhanced in the aspects of brilliance, contrast and the like, not only can satisfy the application requirements of coatings, plastics, inks and other traditional industries, but also can satisfy the requirements of color filters used in liquid crystal displays.

Description

Technical field [0001] The invention relates to a production process of organic pigments, in particular to a production process of high-grade phthalocyanine green pigments. Background technique [0002] With the rapid development of the ink, coating and plastic markets, in order to make the colorant phthalocyanine green bright, not only high light fastness is required, but also high color strength and high contrast are required. Now mainly use phthalocyanine green (C.I.P.G.7) pigment. The phthalocyanine green obtained by synthesis cannot be used as a pigment due to severe agglomeration of particles, dark color and low color power. Therefore, the so-called pigmentation process must be carried out to separate the agglomerated particles into fine small particles. Tens of nanometers. The main methods of phthalocyanine green pigmentation processing include mechanical grinding, solvent treatment, and acid treatment. [0003] The acid treatment method is to dissolve the pigment in acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/10C09B67/04C09D7/12C08K9/04
Inventor 张晓明王南松
Owner LIWANG CHEM NANTONG
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