Fumed silica flatting powder and preparation method thereof
A technology of fumed silica and silicon dioxide, applied in the directions of silicon dioxide, silicon oxide, chemical instruments and methods, can solve the problems of unfavorable construction, large addition ratio, poor transparency of matting powder, etc., and achieve strong resistance Scratch performance, high transparency effect
Active Publication Date: 2016-03-16
JIANGXI BLACK CAT CARBON BLACK CO LTD
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Problems solved by technology
[0004] The object of the present invention is to provide a kind of fumed silica matting powder and preparation method thereof, which solves the problem that the existing matting powder has poor transparency and affects the color and luster of the coating itself; the addition ratio is too large and the cost is too high; the scratch resistance performance is not good. Good; poor dispersion performance; great influence on coating viscosity, which is not conducive to construction
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[0024] The following will be combined with figure 1 The beneficial effects of the present invention are described in detail, aiming at helping readers better understand the essence of the present invention, but not limiting the implementation and protection scope of the present invention.
[0025] A fumed silica matting powder, the mass fraction of silica is >99%, the specific surface area is 100-400m2 / g; the primary particle diameter is 8-15 nanometers, and the average particle diameter after grinding and classification is 3-8 microns.
[0026] The nano-silica surface of the above-mentioned fumed silica matting powder is treated with amine groups to become hydrophobic, and its hydrophobic rate is 25%-65%. The hydrophobic rate is calculated based on the proportion of hydroxyl groups on the surface of nano-silica.
[0027] The metal ion content of the above-mentioned fumed silica matting powder is not more than 60ppm.
[0028] A fumed silica matting powder and a preparation s...
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Abstract
The invention discloses fumed silica flatting powder and its preparation method. Base stock of the flatting powder is uniform fumed silica with its particle size being 3-8 micrometers. The base stock undergoes surface amination treatment. The preparation method comprises the following steps: hydrolyzing chlorosilane in high-temperature oxyhydrogen flame to prepare the nanometer fumed silica; during aggregation process, surface amination treatment is finished; a product with by-products removed is ground to specific particle size, and then grading treatment is carried out to prepare the fumed silica flatting powder. The product can be widely used in multiple complex systems to achieve an excellent flatting effect.
Description
technical field [0001] The invention relates to a matting powder, in particular to a fumed silica matting powder and a preparation method thereof. Background technique [0002] In recent years, my country's paint and leather market has been continuously developed, and its total output has leapt to the first place in the world. The once high-gloss gloss paint was popular among consumers for its bright color and brightness. However, with the improvement of people's living standards, consumers feel that the surface of high-gloss paint is more reflective after film formation, which is harmful to human eyes. On the other hand, consumers' aesthetic concepts are increasingly inclined to leisure, fashion and personalization, coupled with the vigorous development of my country's automobile and home appliance industries. This has led to a sharp increase in the demand for low-gloss coatings and leather products with a soft appearance, and the demand for various matting agents is also i...
Claims
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IPC IPC(8): C01B33/12C09C1/28C09C3/08C09D7/12
CPCC09D7/62C01B33/126C09C1/28C09C3/08C01P2004/61C01P2006/12C01P2006/80
Inventor 曹大志张守宽袁伟韩怀见
Owner JIANGXI BLACK CAT CARBON BLACK CO LTD