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Preparation method of barium sulfate for powder coating

A technology of powder coating and barium sulfate, which is applied in powder coatings, chemical instruments and methods, calcium/strontium/barium sulfate, etc., can solve the problems of unsatisfactory effect and high cost of coupling agent, and achieve market competitiveness and production Low cost, effect of improving coating film thickness

Inactive Publication Date: 2017-07-25
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of the coupling agent used in these methods is on the high side, and the effect of using a single surface modifier is not ideal

Method used

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  • Preparation method of barium sulfate for powder coating
  • Preparation method of barium sulfate for powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of barium sulfate for powder coating, comprising the following steps:

[0036] (1) Select the raw material barite 1, in which the content of barium sulfate is 92.1%, and the content of silicon dioxide is 2.4%. The raw material barite 1 is pulverized by a pulverizer to obtain barite powder a, and then according to the weight ratio of barite powder a: coal powder 2: limestone powder 3 is 4.0:1:0.2, barite powder a and After the pulverized coal 2 and the powdered limestone 3 are fully mixed, they are sent to a rotary kiln for high-temperature roasting and reduction at 900°C. After a residence time of 1.5 hours, the reduced roasting product b is obtained.

[0037] (2) Add the reduced roasted product b into the leaching tank, add hot water 4 at 75°C to it, and soak for 3.5 hours to obtain a suspension c; send the suspension c to a plate-and-frame filter A is filtered to obtain filtrate d and filter residue e; the filtrate d is pumped into the thickening...

Embodiment 2

[0044] A preparation method of barium sulfate for powder coating, comprising the following steps:

[0045] (1) Select the raw material barite 1, in which the content of barium sulfate is 91.6%, and the content of silicon dioxide is 2.1%. The raw material barite 1 is pulverized by a pulverizer to obtain barite powder a, and then

[0046] Finally, according to the weight ratio of barite powder a: coal powder 2: limestone powder 3 is 4.0:1.2:0.4, after the barite powder a is fully mixed with coal powder 2 and limestone powder 3, it is sent into a rotary kiln at 1200 ° C. Calcination and reduction at high temperature, after a reaction time of 0.56h, the reduced calcined product b was obtained.

[0047] (2) Add the reduced roasted product b into the leaching tank, add hot water 4 at 70°C to it, and soak for 3.5 hours to obtain a suspension c; send the suspension c to a plate-and-frame filter A is filtered to obtain filtrate d and filter residue e; the filtrate d is pumped into th...

Embodiment 3

[0054] A preparation method of barium sulfate for powder coating, comprising the following steps:

[0055] (1) Select the raw material barite 1, in which the content of barium sulfate is 93.2%, and the content of silicon dioxide is 1.4%. The raw material barite 1 is pulverized by a pulverizer to obtain barite powder a, and then according to the weight ratio of barite powder a: coal powder 2: limestone powder 3 is 4.0:0.8:0.3, barite powder a and After the pulverized coal 2 and the powdered limestone 3 are fully mixed, they are sent to a rotary kiln for high-temperature roasting and reduction at 1000°C. After 1.0 hours of reaction, the reduced roasting product b is obtained.

[0056] (2) Add the reduced roasted product b into the leaching tank, add hot water 4 at 65°C to it, and soak for 4.0 hours to obtain a suspension c; send the suspension c to a plate-and-frame filter A is filtered to obtain filtrate d and filter residue e; the filtrate d is pumped into the thickening tank...

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Abstract

The invention discloses a preparation method of barium sulfate for powder coating. The method comprises the following steps of enabling barite and a mirabilite solution from which calcium, magnesium and other impurities are removed to react to prepare barium sulfate, wherein the barite is calcined and reduced into barium sulfide; modifying the surface of a newly-generated barium sulfate crystal nucleus via surface modifying and a dispersant M, and further modifying the surfaces of barium sulfate particles by a surface modifier N, so that the particles can be effectively combined with organic macromolecules in the powder coating, and well dispersed in the coating. The prepared barium sulfate has the advantages of low oil absorbing amount, good lipophilicity, uniform particle dispersing and the like. The powder coating for production has the advantages of high whiteness, good fluidity, uniform dispersing and the like.

Description

technical field [0001] The present invention relates to materials used as powder coating components, in particular surface-modified barium sulfate for powder coating fillers. Background technique [0002] Precipitated barium sulfate is used in coatings, which can add hardness, wear resistance, and light resistance to the product. However, the surface property of barium sulfate is oleophobic, which is quite different from the organic polymers in powder coatings. Therefore, it is necessary to Barium sulfate is used for surface modification to change the original oleophobic surface property to the modified oleophilic property. The surface modification method of barium sulfate is mainly to form one or more layers of low molecular weight organic film, polymer film or inorganic-organic composite film on its surface by chemical precipitation or physical-chemical adsorption method to adjust the surface of barium sulfate. Excellent acid-base balance and surface lipophilicity, reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46C09D5/03C09D7/12
CPCC01F11/462C09D5/033
Inventor 胡永琪魏晓建赵少博刘硕磊王建臣田炳龙刘润静赵风云程刘备
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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