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Preparation method of highly dispersion and high thermal conductivity white carbon black

A technology of high thermal conductivity and white carbon black, applied in chemical instruments and methods, dyeing polymer organic compound treatment, silicon compounds, etc., can solve the problems of dispersion difference, poor compatibility of white carbon black, poor thermal conductivity of silica, etc.

Active Publication Date: 2019-07-26
QUECHEN SILICON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method uses liquid sodium silicate and dilute sulfuric acid as raw materials, controls the pH value to swing back and forth from 11±1 to 5±1 for a total of 5 times, and then carries out press-filter washing, spray drying, and material making to obtain the degree of dispersion / grade. 9.5-10 high dispersion and large pore volume precipitated silica, due to the existence of a large number of pores, the thermal conductivity of the silica is poor
[0004] In the prior art, by adding Al with better thermal conductivity 2 o 3 , ZnO, SiC fillers, etc. to improve the heat dissipation performance of rubber, but there are obvious differences in the dispersion of different fillers in rubber, and the compatibility with white carbon black is poor

Method used

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preparation example Construction

[0023] A preparation method of highly dispersed and highly thermally conductive white carbon black, comprising the following steps:

[0024] (1) prepare sodium silicate solution and acid solution;

[0025] (2) adding surfactant, aluminum salt, magnesium salt and acid solution to the sodium silicate solution until the pH value of the system is 5 to obtain the mother liquor;

[0026] (3) Add sodium silicate solution to the mother liquor, adjust the pH value of the system to 11 from 5 gradients, then add acid solution to the mother liquor, adjust the pH value of the system to 5 from 11 gradients;

[0027] (4) The mother liquor is separated and dried to obtain white carbon black.

[0028] In another preferred technical solution, in step (2), the mass percent concentration of the surfactant in the mother liquor is 0.2-2%.

[0029] In another preferred technical solution, the surfactant is a nonionic surfactant.

[0030] In another preferred technical solution, the nonionic surfa...

Embodiment 1

[0044] A preparation method of highly dispersed and highly thermally conductive white carbon black, comprising the following steps:

[0045] (1) Dissolve sodium silicate with a modulus of 2.2 in water and prepare a density of 1.17g / cm 3 Sodium silicate solution, dilute concentrated sulfuric acid with water to prepare dilute sulfuric acid with a concentration of 1mol / L;

[0046] (2) After heating the sodium silicate solution to 80°C, under stirring, first add octylphenol polyoxyethylene ether, aluminum sulfate and magnesium sulfate to the sodium silicate solution, mix well, and then add dilute sulfuric acid until The pH value of the system was 5, and the mother liquor was obtained after reacting for 10 minutes. The mass concentration of octylphenol polyoxyethylene ether was 0.5%, the consumption of aluminum sulfate was 1% of the quality of sodium silicate, and the consumption of magnesium sulfate was 1% of the quality of sodium silicate. 1%;

[0047] (3) Add sodium silicate s...

Embodiment 2

[0051] A preparation method of highly dispersed and highly thermally conductive white carbon black, comprising the following steps:

[0052] (1) Dissolve sodium silicate with a modulus of 3.7 in water and prepare a density of 1.20g / cm 3 Sodium silicate solution, dilute concentrated sulfuric acid with water to prepare dilute sulfuric acid with a concentration of 2.5mol / L;

[0053] (2) After heating the sodium silicate solution to 90°C, under stirring, first add octylphenol polyoxyethylene ether, aluminum sulfate and magnesium sulfate to the sodium silicate solution, mix well, and then add dilute sulfuric acid until The pH value of the system was 5, and the mother liquor was obtained after reacting for 10 minutes. The mass concentration of octylphenol polyoxyethylene ether was 0.5%, the consumption of aluminum sulfate was 1.5% of the quality of sodium silicate, and the consumption of magnesium sulfate was 1.5% of the quality of sodium silicate. 0.5%;

[0054] (3) Add sodium si...

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Abstract

The invention discloses a preparation method of highly dispersion and high thermal conductivity white carbon black. The preparation method includes the steps of 1), preparing a sodium silicate solution and an acid solution; 2), adding a surface active agent, aluminum salt, magnesium salt and the acid solution to the sodium silicate solution till the pH value of the system is to obtain mother liquid; 3), adding the sodium silicate solution to the mother liquid, adjusting the pH value of the system from gradient 5 to 11, and then adding the acid solution to the mother liquid to adjust the pH value of the system from gradient 11 to 5; 4), separating and drying the mother liquid to obtain the white carbon black. Compared with the prior art, the preparation method has the advantages that the thermal conductivity of the white carbon black is above 15w / m k, and the dispersion grade is more than 9.7.

Description

technical field [0001] The invention relates to a preparation method of highly dispersed and highly thermally conductive white carbon black. Background technique [0002] White carbon black is a colorless, non-toxic, amorphous fine powder with small particle size, large specific surface area, high chemical purity, good dispersion performance, high temperature resistance and good electrical insulation. It is used in rubber , plastics, coatings and many other fields are widely used. In 1992, Michelin reduced the rolling resistance of tires by 35% by using white carbon black as a raw material, and also reduced the fuel consumption of automobiles by 3%-5%. In the above applications, the dispersibility and thermal conductivity of silica play an important role in improving the "greening" of tires. Among them, the high thermal conductivity can make the heat generated by the tire friction resistance be dissipated quickly and efficiently, so as to maintain the shape of the tire, re...

Claims

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Application Information

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IPC IPC(8): C01B33/193C01B33/18C08L21/00C08K9/12C08K3/36C08K3/22C09C1/30C09C3/10C09C3/06
CPCC01B33/193C01B33/18C08K9/12C08K3/36C08K3/22C09C1/309C09C3/10C09C3/06C09C3/006C08K2003/2227C08K2003/2224C01P2006/32C01P2004/82C08L21/00
Inventor 王永庆毛善兵于方琪
Owner QUECHEN SILICON CHEM
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