Method for carrying out surface treatment on pigments by using phosphorous compounds

A surface treatment and compound technology, applied in dyeing low-molecular-weight organic compound treatment, pigment slurry, organic dyes, etc., can solve the problem of unable to meet the requirements of color paste stability and tinting strength, and improve the stability and tinting strength. Effect

Active Publication Date: 2012-07-25
SUZHOU SUNMUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Surface modification of pigments and fillers using alkyl phosphate monoesters is a known technology, however, the use of alkyl phosphate monoester-treated pigments in the preparation of water-based colorants still does not meet the formulator's requirements for colorant stability To meet the requirements of tinting strength, the existing method of treating the surface of pigments with alkyl phosphoric acid monoester is improved, which is conducive to promoting the improvement of the stability of water-based color paste and the improvement of tinting strength.

Method used

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  • Method for carrying out surface treatment on pigments by using phosphorous compounds
  • Method for carrying out surface treatment on pigments by using phosphorous compounds
  • Method for carrying out surface treatment on pigments by using phosphorous compounds

Examples

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Embodiment 1

[0031] Mix 0.2kg 2-benzyl phenyl phosphate monoester, 0.2kg octadecyl phosphate monoester and 10kg carbon black in 50kg deionized water and stir into a slurry at room temperature, then adjust with 20wt.% NaOH aqueous solution The pH value of the slurry is 11.0. After stirring the slurry with adjusted pH value at 50 r / min for 2 hours at 85° C., the resulting slurry is filtered to obtain a pigment filter cake. After complete vacuum drying at 0.03MPa pressure and 60°C temperature, the dried pigment filter cake is pulverized into powder by using pulverization equipment with a pulverization fineness of less than 20 mesh.

Embodiment 2

[0033] With 0.2kg 2,4,6-three (1-methyl-1-phenylethyl) phenyl phosphate monoester, 0.3kg hexadecyl phosphate monoester and 10kg iron oxide red are mixed uniformly in 50kg deionized water and After stirring at room temperature to form a slurry, adjust the pH value of the slurry to 9.0 with 15wt.% ammonia solution, and stir the slurry with adjusted pH value at 100r / min for 5 hours at 60°C. The obtained slurry is filtered to obtain a pigment filter cake, and after the obtained pigment filter cake is vacuum-dried at a pressure of 0.06 MPa and a temperature of 85° C., the dried pigment filter cake is pulverized into a powder using a crushing equipment with a grinding fineness of less than 20 mesh.

Embodiment 3

[0035] 0.2kg 2,4,6-tris(1-methyl-1-phenylethyl) phenyl phosphate monoester, 0.3kg octadecyl phosphate monoester and 10kg Pigment Blue 15 (P.B.15) in 50kg deionized After mixing uniformly in water and stirring at room temperature to form a slurry, adjust the pH value of the slurry to 9.0 with 15wt.% ammonia solution, and stir the slurry with adjusted pH value at 60°C at 100r / min for 5 Hours later, the obtained slurry was filtered to obtain a pigment filter cake, and after the obtained pigment filter cake was completely vacuum-dried at a pressure of 0.06MPa and a temperature of 70°C, the dried pigment filter cake powder was crushed using a crushing equipment with a grinding fineness of less than 20 mesh into powder.

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Abstract

The invention discloses a method for carrying out surface treatment on pigments by using phosphorous compounds. The method comprises the following steps that mixing aromatic phosphorous compound and alkyl phosphorous compound and then carrying out surface treatment on a pigment, wherein one of 2-benzyl phenol phosphomonoester and 2,4,6-tris(1-methyl-1-phenylethyl)phenol phosphomonoester is preferably chosen as the aromatic phosphorous compound, and alkyl phosphate containing 12 to 18 carbon atoms is preferably chosen as the alkyl phosphorous compound. When the pigment treated by the method is used in the preparation of water-based color paste, the stability and tinctorial strength of the water-based color paste are remarkably enhanced.

Description

technical field [0001] The invention relates to a method for surface treatment of pigments, in particular to a method for surface treatment of pigments with phosphorus-containing compounds to improve the stability and coloring effect of pigments in water-based systems. Background technique [0002] Pigment surface treatment refers to a method of depositing or coating surfactants, surface modifiers, polymer compounds and other substances on the surface of pigment particles, thereby significantly changing the surface properties of pigment particles. [0003] Surface treatment of pigments to facilitate their stable dispersion in organic solvents and maintain a small particle size is a very mature technology. However, as the whole society pays more and more attention to the control of environmental pollution in recent years, relevant laws and regulations have become increasingly strict on the emission of volatile organic compounds (VOC), and industries such as coatings and inks ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08C09C1/56C09C1/24C09C1/36C09B67/20C09D17/00
Inventor 杜长森梅成国周华伍金平许丹
Owner SUZHOU SUNMUN TECH CO LTD
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