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Hydrophobic high-dispersion white carbon black as well as preparation method and application thereof

A high-dispersion white carbon black and precipitation reaction technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of limited modification degree and low surface energy, so as to improve hydrophobic performance and dispersion effect Effect

Pending Publication Date: 2022-04-05
WUXI HENGCHENG SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has low surface energy through the fluorine-containing high molecular polymer, and is firmly combined with the silane coupling agent in the form of covalent bonds. The hydrophobic performance of the modified silica is very good, but the preparation method still adopts The silane coupling agent and organic solvent directly treat the silica suspension, and the degree of modification is limited

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  • Hydrophobic high-dispersion white carbon black as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0045] The present embodiment provides a kind of preparation method of hydrophobic highly dispersed white carbon black, and described preparation method comprises the following steps:

[0046] (1) Mix 1.2mol / L sodium silicate aqueous solution and 4wt% silane coupling agent ethanol solution, blow CO into during mixing 2 Adjust the pH value to 8 to obtain a mixed solution; the concentration of the silane coupling agent in the mixed solution is 0.8 wt%, and the silane coupling agent is γ-aminopropyltriethoxysilane (KH-550);

[0047] (2) Under the condition of 82 DEG C, add acid solution dropwise to the mixed solution obtained in step (1) for 55 minutes, adjust the pH value to 4.5, and the process of adding acid solution is accompanied by stirring, and the stirring speed is 500r / min; 82 Precipitation reaction at ℃ for 45 minutes, the process of precipitation reaction is accompanied by stirring, the stirring speed is 500r / min; then spray drying is carried out to obtain the hydropho...

Embodiment 2

[0050] The present embodiment provides a kind of preparation method of hydrophobic highly dispersed white carbon black, and described preparation method comprises the following steps:

[0051] (1) Mix 0.5mol / L sodium silicate aqueous solution and 3wt% silane coupling agent ethanol solution, blow into CO in the mixing process 2 Adjust the pH value to 7 to obtain a mixed solution; the concentration of the silane coupling agent in the mixed solution is 0.5 wt%, and the silane coupling agent is γ-(methacryloyloxy)propyltrimethoxysilane (KH-570 );

[0052] (2) Under the condition of 80 DEG C, in step (1) gained dropwise acid solution 60min, adjust pH value to be 5, the process of dropping acid solution is accompanied by stirring, and the rotating speed of described stirring is 300r / min; 80 ℃ precipitation reaction for 60 minutes, the process of precipitation reaction is accompanied by stirring, and the rotation speed of the stirring is 300r / min; then spray drying is carried out to...

Embodiment 3

[0055] The present embodiment provides a kind of preparation method of hydrophobic highly dispersed white carbon black, and described preparation method comprises the following steps:

[0056] (1) Mix 2mol / L sodium silicate aqueous solution and 5wt% silane coupling agent ethanol solution, blow into CO in the mixing process 2 Adjust the pH value to 9 to obtain a mixed solution; the concentration of the silane coupling agent in the mixed solution is 1 wt%, and the silane coupling agent is γ-(methacryloyloxy)propyltrimethoxysilane (KH-570) ;

[0057] (2) under the condition of 85 DEG C, in the mixed solution obtained in step (1), add acid solution dropwise for 30 minutes, adjust the pH value to 4, and the process of adding acid solution is accompanied by stirring, and the rotating speed of the stirring is 600r / min; 85 Precipitation reaction at ℃ for 50 minutes, the process of precipitation reaction is accompanied by stirring, and the rotation speed of the stirring is 600r / min; t...

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Abstract

The invention provides hydrophobic high-dispersion white carbon black and a preparation method and application thereof.The preparation method comprises the following steps that 1, a sodium silicate aqueous solution and a silane coupling agent organic solution are mixed, the pH value is adjusted to be 7-9 in the mixing process, and a mixed solution is obtained; and (2) dropwise adding an acid solution into the mixed solution obtained in the step (1), adjusting the pH value to 4-5, carrying out a precipitation reaction, and then carrying out solid-liquid separation to obtain the hydrophobic high-dispersion white carbon black. According to the preparation method, the sodium silicate aqueous solution and the silane coupling agent organic solution are directly mixed, so that the sodium silicate is obtained by reacting in the silane coupling agent solvent, the dispersion effect of the silane coupling agent on the white carbon black is improved, and the hydrophobic property of the finally obtained white carbon black is improved.

Description

technical field [0001] The application belongs to the technical field of inorganic materials, and relates to a preparation method of silicon dioxide, in particular to a hydrophobic high-dispersion white carbon black and its preparation method and application. Background technique [0002] Silica is hydrated silica, which has good dispersibility, reinforcement, matting, thickening, etc., so it is widely used in industries such as rubber, plastics, coatings, paper, ink, and daily chemicals. As an important reinforcing agent in the rubber industry, silica has a large specific surface area, small particle size, and more free hydroxyl groups on the surface. These free hydroxyl groups can form physical or chemical bonds with rubber molecules to achieve the reinforcing effect. The use of silica in tire treads can significantly reduce the rolling resistance of tires while maintaining good ice and wet skid resistance. [0003] At present, the methods of industrial production of whit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/193C08K7/26
CPCC08K3/36C01B33/143C08K7/26C01B33/193C08K9/06
Inventor 陈南飞卢爱平王明贺陈辰陈家树史彤
Owner WUXI HENGCHENG SILICON IND CO LTD