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Surface modified barium sulfate base ultrafine function powder material and preparation method thereof

A surface modification and functional powder technology, applied in fibrous fillers and other directions, can solve the problems of inability to meet downstream applications, poor functionality, and large equipment, achieving excellent industrial value, excellent surface properties, and increasing functionality and phase. capacitive effect

Inactive Publication Date: 2009-04-29
胡智勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent whose patent number is ZL200610031397.6 also discloses a method for producing precipitated barium sulfate with white carbon black waste liquid (Na2SO4industrial waste liquid), Although the production cost is low, its products are still ordinary precipitated barium sulfate products
In addition, there is also a direct synthesis reaction of barium chloride and sulfuric acid to produce barium sulfate and sodium chloride, but now this production process requires huge equipment, complicated processes, high investment and high cost, and is generally not used.
The most important point is that the barium sulfate powder obtained by the above-mentioned existing barium sulfate powder production method stays at the micron level, has poor functionality, large particle size distribution, and without any improvement, cannot meet the requirements of downstream application fields. Require

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  • Surface modified barium sulfate base ultrafine function powder material and preparation method thereof

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Embodiment 1

[0022] A surface-modified barium sulfate-based ultra-fine functional powder material used in the production of plastics. The powder material is prepared from a suspension of barium sulfate powder and treated with a treatment agent sodium stearate for surface modification. The maximum particle size of the barium sulfate powder of the matrix is ​​below 2 μm, and the particle size (D50) is below 0.5 μm. The powder material is mainly used for polyethylene (PE plastic), polypropylene (PP plastic), acrylonitrile-butylene Diene-styrene copolymer (ABS plastic) is reinforced to enhance its weather resistance, increase gloss and reduce costs. The powder material has surface hydrophobic properties and excellent compatibility, and it is mainly prepared by the following method (such as figure 1 process shown):

[0023] (1) The preparation of raw material: first raw material barium carbonate is carried out slurrying, the mass concentration after slurrying is controlled at 30%; Sulfuric aci...

Embodiment 2

[0029]A surface-modified barium sulfate-based ultrafine functional powder material for producing printing ink, the powder material is made of barium sulfate powder suspension through a mixture of ethylenediaminetetraacetic acid and triethanolamine (mass ratio is 1: 3) Prepared after surface modification treatment, the maximum particle size of the barium sulfate powder used as the matrix is ​​below 1 μm, and the particle size (D50) is below 0.3 μm. This powder material can greatly improve the brightness and color of high-end inks Realistic, weather-resistant and impermeable, and enables ultra-thin coatings. The surface of the powder material has amphoteric groups, which are mainly prepared by the following methods:

[0030] (1) The preparation of raw material: first raw material barium carbonate is carried out slurrying, the mass concentration after slurrying is controlled at 22%; Sulfuric acid solution is removed impurity, adjusts sulfuric acid solution mass concentration valu...

Embodiment 3

[0036] A surface-modified barium sulfate-based ultrafine functional powder material for rubber production. The powder material is prepared from barium sulfate powder suspension through surface modification treatment with siloxane. Barium sulfate as a matrix The maximum particle size of the powder is below 1 μm, and the particle size (D50) is below 0.5 μm. The powder material is mainly prepared by the following methods:

[0037] (1) The preparation of raw material: first raw material barium carbonate is carried out slurrying, the mass concentration after slurrying is controlled at 26%; Sulfuric acid solution is removed impurity, adjusts sulfuric acid solution mass concentration value to be 85%; Prepare a certain amount (its quality 2% of the quality of barium carbonate) isolating agent sodium metasilicate;

[0038] (2) Synthetic reaction: the above-mentioned prepared release agent sodium metasilicate is formulated into a solution (mass concentration is 3%) and added in the reac...

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Abstract

The invention discloses a barium sulfate-based superfine functional powder material subjected to surface modification. The material is prepared by surface modification of barium sulfate powder suspension through a finishing agent, wherein the finishing agent is stearate, silicate, an organic complexing agent or a coupling agent provided with functional groups, and the particle diameter of barium sulfate powder is between 100 namometers and 2 mu m. The preparation method for the material comprises the following steps: barium sulfate, a sulfuric acid solution and a dusting agent perform synthesis reaction, and the barium sulfate powder suspension obtained after reaction is subjected to slaking, separation, washing, slurrying, surface modification and drying to obtain a finished product, wherein the dusting agent is sulfate, phosphate, silica sol, organic complexing agent or sodium polyethylene. The powder material has the advantages of small particle diameter, strong functionality, low cost and so on, and the preparation method has the advantages of small investment, low energy consumption, simple technology, no pollution, superior product performance and so on.

Description

technical field [0001] The invention relates to a modified powder material and its preparation, in particular to a surface-modified barium sulfate-based powder material and its preparation method. Background technique [0002] At present, domestic barium-based powder materials can be roughly divided into two categories: one is the barium-based powder obtained from high-quality natural ore—barite, which is crushed, sieved and moderately followed up. Its main technical index is BaSO 4 The content is 80-92%, the whiteness is 85-94 degrees, the particle size distribution is 1-100 μm, and the average particle size is 5-10 μm; the second is obtained by chemical synthesis using barium-containing raw materials, commonly known as precipitated barium sulfate, usually with Glauber's salt (or containing SO 4 2- solution) and the black ash drawing solution for displacement reaction, and then press filtration, washing, drying, crushing, and packaging to obtain the precipitated barium su...

Claims

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Application Information

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IPC IPC(8): C09C1/02
Inventor 胡智勇
Owner 胡智勇
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