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Method for preparing high-structure-dimension and high-reinforcing white carbon black and white carbon black obtained by same

A white carbon black and mixed liquid technology, applied in the field of white carbon black, can solve the problems such as the decline of rubber tear strength, wear resistance and other properties, affecting the service life and safety of tires, and low dispersion of white carbon black, etc. To achieve the effect of reducing the surface tension of the solution, promoting the formation of the solid phase, and the preparation method is simple and feasible

Inactive Publication Date: 2018-06-01
WUXI HENGCHENG SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, compared with the fumed silica, the silica produced by the ordinary precipitation method has a high surface silanol content, which leads to low dispersion of the silica in the rubber compound and is easy to agglomerate, making the rubber tear strength, Decreased performance such as wear resistance affects the service life and safety of tires

Method used

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  • Method for preparing high-structure-dimension and high-reinforcing white carbon black and white carbon black obtained by same

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Experimental program
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Effect test

Embodiment 1

[0031] The preparation method of the white carbon black that the present embodiment provides is as follows:

[0032] (1) Add sodium dodecylbenzenesulfonate to SiO 2 Concentration is 1.34mol / L in the water glass solution, under the stirring rate of 250rpm, heat up to 85 ℃, wherein, the addition amount of sodium dodecylbenzenesulfonate is SiO 2 The theoretical yield is 2.47wt%, and the modulus of water glass is 3.3.

[0033] (2) Sodium sulfate is added in the mixed solution that step (1) obtains, stirring reaction, utilize sulfuric acid solution to adjust pH in reaction process, wherein, the addition of sodium sulfate is SiO 2 1.56 wt% of theoretical yield.

[0034] (3) Stop the reaction when the pH value of the reaction solution is 5.0, and age for 120 minutes to obtain a white carbon black mixture.

[0035] (4) Washing the white carbon black mixed solution obtained in step (3), centrifuging and filtering, drying in an oven at 105° C., controlling the water content of the wh...

Embodiment 2

[0037] The preparation method of the white carbon black that the present embodiment provides is as follows:

[0038] (1) Add sodium dodecylbenzenesulfonate to SiO 2 Concentration is 1.5mol / L water glass solution, under the stirring rate of 200rpm, heat up to 80 ℃, wherein, the addition amount of sodium dodecylbenzene sulfonate is SiO 2 2wt% of theoretical output, the modulus of water glass is 3.

[0039] (2) Sodium sulfate is added in the mixed solution that step (1) obtains, stirring reaction, utilize sulfuric acid solution to regulate pH in reaction process, wherein, the addition of sodium sulfate is SiO 2 3 wt% of theoretical yield.

[0040] (3) Stop the reaction when the pH value of the reaction solution is 5.5, and age for 50 minutes to obtain a white carbon black mixture.

[0041] (4) Washing the white carbon black mixed solution obtained in step (3), centrifuging and filtering, drying in an oven at 100° C., controlling the water content of the white carbon black to 8...

Embodiment 3

[0043] The preparation method of the white carbon black that the present embodiment provides is as follows:

[0044] (1) Add sodium dodecylbenzenesulfonate to SiO 2 Concentration is 1mol / L water glass solution, under the stirring rate of 450rpm, heat up to 90 ℃, wherein, the addition amount of sodium dodecylbenzene sulfonate is SiO 2 3wt% of theoretical output, the modulus of water glass is 4.

[0045] (2) Sodium sulfate is added in the mixed solution that step (1) obtains, stirring reaction, utilize sulfuric acid solution to regulate pH in reaction process, wherein, the addition of sodium sulfate is SiO 2 0.1 wt% of theoretical yield.

[0046] (3) Stop the reaction when the pH value of the reaction solution is 4.0, and age for 70 minutes to obtain a white carbon black mixture.

[0047](4) Washing the white carbon black mixed solution obtained in step (3), centrifuging and filtering, drying in an oven at 115° C., controlling the water content of the white carbon black to 3 ...

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Abstract

The invention provides a method for preparing high-structure-dimension and high-reinforcing white carbon black and white carbon black obtained by the same. The preparation method comprises the following steps: (1) adding an anionic surfactant to a water glass solution, stirring and heating; (2) adding sodium sulfate to a liquid mixture obtained in step (1), stirring and reacting, and adjusting thepH with a sulfuric acid solution during the reaction; (3) after the reaction is completed, performing aging to obtain a liquid mixture of white carbon black. The white carbon black prepared by the preparation method provided by the invention has the advantages of specific surface area of 153 to 249 m[2] / g, DBP oil absorption value of 2.30 to 2.60 mL / g, high product structural property and good dispersibility. When the white carbon black is used for a styrene butadiene rubber reinforcing agent, the wear resistance, tensile strength and other properties of vulcanized rubber are improved, and the reinforcing property of the traditional white carbon black is improved.

Description

technical field [0001] The invention belongs to the field of white carbon black preparation, and relates to a preparation method of white carbon black and white carbon black obtained therefrom, in particular to a preparation method of high-structure and high-reinforcement white carbon black and white carbon black obtained therefrom. carbon black. Background technique [0002] Silica is also known as hydrated silica, and its molecular formula is SiO 2 ·nH 2 O, has the advantages of light weight, non-toxic and tasteless, insoluble in water and acid, high temperature resistance, and stable chemical properties. Compared with ordinary silica, nano-silica exhibits unusual particle characteristics (such as small particle size, large specific surface area, high purity, and tendency to form chains, etc.), and is used as a reinforcing, extinction, thixotropic, and thickening agent It is widely used in rubber, paint, medicine, plastic, cosmetics, toothpaste and other industries. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
CPCC01B33/12C01P2006/12
Inventor 陈南飞卢爱平王明贺
Owner WUXI HENGCHENG SILICON IND CO LTD
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