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A kind of preparation method and application of inorganic pigment and filler aqueous dispersant

The technology of a water-based dispersant and its production method is applied in the field of water-based dispersant for inorganic pigments and fillers and the production of water-based dispersants for inorganic pigments and fillers. Particle flocculation and other problems, to achieve good steric hindrance, good dispersion and viscosity reduction effect, high grinding efficiency

Active Publication Date: 2022-05-24
WUHAN OXIRAN SPECIALTY CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing traditional dispersants have limitations in certain performances. The adsorption between the dispersant and the surface of the pigment particles is not reliable, and it is easy to re-flocculate the dispersed particles after desorption, resulting in the long-term stability of the dispersed color paste.

Method used

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  • A kind of preparation method and application of inorganic pigment and filler aqueous dispersant
  • A kind of preparation method and application of inorganic pigment and filler aqueous dispersant
  • A kind of preparation method and application of inorganic pigment and filler aqueous dispersant

Examples

Experimental program
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Effect test

Embodiment 1

[0044]The first solution is obtained by mixing the total mass of deionized water with monomeric acrylic acid and maleimide in a mass ratio of 1.5:1, and ammonium persulfate and deionized water are mixed into a 5% solution to form a second solution, A third solution was formed by making up a 5% solution of ferrous sulfate and deionized water. The first solution, the second solution and the third solution were added dropwise to the unsaturated block polyether, the dropwise addition was continued at 65°C and the reaction was carried out. the fourth solution. Triethylamine is added to the fourth solution, the fourth solution is neutralized to pH 6 to 8, and the inorganic pigment and filler aqueous dispersant is obtained.

[0045] In this embodiment, x is 7 and y is 25 in the unsaturated block polyether; the molar ratio of acrylic acid, maleimide and unsaturated block polyether is 1.6:0.8:1; oxidation-reduction The mass of ammonium persulfate in the system initiator accounts for ...

Embodiment 2

[0047] The first solution is obtained by mixing the total mass of deionized water with monomer maleic acid and methacrylamide in a mass ratio of 2.2:1, and potassium persulfate and deionized water are mixed into a 10% solution to form a second solution , a 10% solution of potassium bisulfite and deionized water was prepared to form a third solution. The first solution, the second solution and the third solution were added dropwise to the unsaturated block polyether, and the dropwise addition and reaction were continued at 82 °C. the fourth solution. A potassium hydroxide 30% (w%) solution was added to the fourth solution, the fourth solution was neutralized to pH 6 to 8, and the inorganic pigment and filler aqueous dispersant was obtained.

[0048] In this embodiment, x is 3 and y is 15 in the unsaturated block polyether; the molar ratio of maleic acid, methacryloyl and unsaturated block polyether is 3.0:1.8:1; oxidation- In the reduction system initiator, the mass of potass...

Embodiment 3

[0050] The first solution was obtained by mixing the total mass of deionized water with methacrylic acid and N-octylmaleimide in a mass ratio of 0.8:1, and sodium persulfate and deionized water were mixed into a 7% solution to form For the second solution, a 7% solution of sodium thiosulfate and deionized water was prepared to form a third solution. The first solution, the second solution and the third solution were added dropwise to the unsaturated block polyether, and the dropwise addition and reaction were continued at 73°C. the fourth solution. A sodium hydroxide 30% (w%) solution is added to the fourth solution, the fourth solution is neutralized to pH 6 to 8, and the inorganic pigment and filler aqueous dispersant is obtained.

[0051] In this embodiment, x is 11 and y is 36 in the unsaturated block polyether; the molar ratio of methacrylic acid, N-octylmaleimide and unsaturated block polyether is 4.5:3.2 : 1; the mass of sodium persulfate in the oxidation-reduction sy...

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Abstract

A preparation method and application of an inorganic pigment and filler aqueous dispersant, including: providing a first monomer and a second monomer, the first monomer includes an ethylenically unsaturated monomer having a carboxyl group, and the second mono The body includes an ethylenically unsaturated monomer containing an amide group; providing an unsaturated block polyether, providing an initiator of a redox system; mixing the first monomer, the second monomer, The unsaturated block polyether, and the redox system initiator, make the first monomer, the second monomer and the unsaturated block polyether undergo a copolymerization reaction, and use a neutralizing agent Adjust the pH to 6-8 to obtain the aqueous dispersion of inorganic pigments and fillers. The dispersant of the present invention has a good dispersing and viscosity-reducing effect on inorganic pigments and fillers, high grinding efficiency, strong wetting and dispersing effect on the surface of pigments, good tinting strength, and strong storage stability, ensuring that inorganic pigments and fillers are Good application in color paste and coating system.

Description

technical field [0001] The present invention relates to the technical field of surfactants, in particular to a method for preparing an aqueous dispersant for inorganic pigments and fillers, an aqueous dispersant for inorganic pigments and fillers prepared by the preparation method, and applications thereof. Background technique [0002] In the production of coatings, inorganic pigments and fillers occupy a considerable proportion. High-quality coatings must have excellent fullness, vividness, gloss and good coloring properties, which all depend on the good dispersion of the pigments. Therefore, inorganic pigments The dispersion of fillers is getting more and more attention. At present, the inorganic pigments and fillers used in coatings are mostly titanium dioxide, iron oxide, calcium carbonate, kaolin, barium sulfate, mica powder and other oxides and water-insoluble inorganic salts, while the inorganic pigments and fillers themselves have high density and large particles. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/40C08F222/02C08F220/56C09D17/00C09D7/65
CPCC08F283/065C09D17/001C09D17/007C09D17/008C09D17/004C09D7/65C08F220/06C08F222/40C08F222/02C08F220/56C08F222/402
Inventor 潘琦刘敏王琴李正华刘思杨瀚石张玉祥张静王亮崔显淼任凡
Owner WUHAN OXIRAN SPECIALTY CHEM CO
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