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A kind of preparation method of chemical coating type hydrophobic white carbon black

A technology of chemical coating and white carbon black, which is applied in chemical instruments and methods, dyed high molecular organic compound treatment, dyed low molecular organic compound treatment, etc., can solve the problem of affecting product performance, poor compatibility of low polar rubber materials, Silica particles are easy to agglomerate and other problems, to achieve the effect of small particle size, good economy, improve dispersibility and hydrophobicity

Active Publication Date: 2021-03-26
HENGDIAN GRP ZHEJIANG INNUOVO SILICON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Silica has strong hydrophilicity, because its surface contains hydrophilic free hydroxyl groups, continuous hydroxyl groups, gemini hydroxyl groups and physically adsorbed water, which makes silica particles easy to agglomerate and is compatible with low-polarity rubber materials. Poor, affecting the performance of the product

Method used

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  • A kind of preparation method of chemical coating type hydrophobic white carbon black
  • A kind of preparation method of chemical coating type hydrophobic white carbon black
  • A kind of preparation method of chemical coating type hydrophobic white carbon black

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Mix the silane coupling agent aminopropyltriethylsiloxane and the organic solvent n-octanol with deionized water at a mass ratio of 1:5 at 30°C while stirring continuously at a stirring speed of 30rpm. Then add dilute sulfuric acid with a mass fraction of 15% into the above solution at a flow rate of 0.5 ml / s to control the pH of the system between 3-5 to prepare a modified solution. The white carbon black was evenly dispersed in the deionized water to form a white carbon black suspension, wherein the white carbon black accounted for 5.0% by mass of the white carbon black suspension.

[0032] The modified solution prepared above is slowly added to the white carbon black suspension, and at the same time, the hyperdispersant polyethyleneimine-polyhydroxyester with a mass of 1.0% of the white carbon black mass and the quality of 1.0% of the white carbon black mass are added. The dehumidifying agent sodium dodecylbenzene sulfonate is continuously stirred, the stirring speed...

Embodiment 2

[0034] Mix the silane coupling agent aminopropyltriethylsiloxane and the organic solvent n-octanol with deionized water at a mass ratio of 1:10 at 30°C, while stirring continuously at a stirring speed of 30rpm. Then add dilute sulfuric acid with a mass fraction of 15% into the above solution at a flow rate of 0.5 ml / s to control the pH of the system between 3-5 to prepare a modified solution. The white carbon black was evenly dispersed in the deionized water to form a white carbon black suspension, wherein the white carbon black accounted for 5.0% by mass of the white carbon black suspension.

[0035] The modified solution prepared above is slowly added to the white carbon black suspension, and at the same time, the hyperdispersant polyethyleneimine-polyhydroxyester with a mass of 1.0% of the white carbon black mass and the quality of 1.0% of the white carbon black mass are added. The dehumidifying agent sodium dodecylbenzene sulfonate is continuously stirred, the stirring spe...

Embodiment 3

[0037] Mix the silane coupling agent aminopropyltriethylsiloxane and the organic solvent n-octanol with deionized water at a mass ratio of 1:5 at 30°C while stirring continuously at a stirring speed of 30rpm. Then add dilute sulfuric acid with a mass fraction of 15% into the above solution at a flow rate of 0.5 ml / s to control the pH of the system between 3-5 to prepare a modified solution. Disperse the white carbon black evenly in deionized water to form a white carbon black suspension, wherein the white carbon black accounts for 10.0% by mass of the white carbon black suspension.

[0038] The modified solution prepared above is slowly added to the white carbon black suspension, and at the same time, the hyperdispersant polyethyleneimine-polyhydroxyester with a mass of 2.0% of the white carbon black mass and the mass of 2.0% of the white carbon black mass are added. The dehumidifying agent sodium dodecylbenzene sulfonate is continuously stirred, the stirring speed is 100rpm, ...

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Abstract

The invention belongs to the field of preparation of white carbon black, and discloses a preparation method of chemically-coated hydrophobic white carbon black. The method comprises the following steps: mixing a silane coupling agent, an alcohol organic solvent and deionized water, stirring, and adding an acidic catalyst to obtain a modified solution; uniformly dispersing white carbon black in deionized water to form a white carbon black suspension; adding the modified solution into the white carbon black suspension, and simultaneously adding a hyperdispersant and a dehumidifying agent to carry out a modification reaction; adding an alkaline solution to control the pH of the reaction system, and carrying out heat preservation aging; filtering and washing the modified white carbon black suspension to obtain a white carbon black filter cake, and drying and crushing the white carbon black filter cake. The white carbon black is modified through a chemical coating method, the hydrophobicityof the white carbon black is improved by controlling the variety and content of the silane coupling agent, meanwhile, agglomeration of the white carbon black is reduced through the hyperdispersant, the water content of the white carbon black is reduced through the dehumidifier, the hydrophobicity of the white carbon black is greatly enhanced, and the method can be widely applied to the industry of defoaming agents.

Description

technical field [0001] The invention relates to the field of white carbon black preparation, in particular to a preparation method of chemically coated hydrophobic white carbon black. Background technique [0002] White carbon black is a general term for white powder X-ray amorphous silicic acid and silicate, which includes precipitated hydrated silica, fumed silica and silica aerogel, which can enhance the wear resistance of rubber And anti-wet skid performance, it is beneficial to reduce the rolling resistance of tires, and plays an important role in improving the performance of rubber. At present, the most commonly used is precipitated silica, which is widely used in rubber, shoes, tires, defoamers and other fields. [0003] Silica has strong hydrophilicity, because its surface contains hydrophilic free hydroxyl groups, continuous hydroxyl groups, gemini hydroxyl groups and physically adsorbed water, which makes silica particles easy to agglomerate and is compatible with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/56C09C3/10C09C3/08C09C3/06
CPCC09C1/56C09C3/006C09C3/06C09C3/08C09C3/10
Inventor 王文君任立荣张和强胡明涛赵孝敏
Owner HENGDIAN GRP ZHEJIANG INNUOVO SILICON MATERIAL