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Low hydroxyl content white carbon black and preparation method thereof

A white carbon black and hydroxyl technology is applied in the field of low hydroxyl content white carbon black and its preparation. properties, improved processability and mechanical properties

Inactive Publication Date: 2017-07-28
WUXI HENGCHENG SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are a large number of hydroxyl groups on the surface of silica, and the polarity is strong. During the application process as a reinforcing agent, it is easy to agglomerate in the rubber matrix, thereby reducing the reinforcing performance of silica to rubber.
Moreover, due to the existence of excess hydroxyl groups, silica will absorb too much vulcanizing agent and accelerator, so that the rubber macromolecules cannot completely contact and interact with them, resulting in a decrease in the vulcanization rate and processing performance of the compound.

Method used

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  • Low hydroxyl content white carbon black and preparation method thereof
  • Low hydroxyl content white carbon black and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (1) Add water to the reactor, and feed steam to control the temperature of the water at 97°C, and then continue to add the concentration (in the form of Na 2 (O represents) be the water glass solution of 2.60N and the vitriol oil, prepare the reaction bottom liquid that pH is 9.0, temperature remains constant during the preparation reaction bottom liquid, wherein the water glass total amount that uses in the precipitation reaction includes bottom liquid preparation the amount consumed in

[0089] (2) maintain the temperature of 97 DEG C to continue to be stable, add the water glass solution used in the concentrated sulfuric acid and the precipitation reaction dropwise to the reaction bottom liquid at the same time within 130min, so that the water glass and the concentrated sulfuric acid are precipitated and reacted, during the whole reaction stage Always keep the reaction temperature stable and the pH of the reaction system at 9.0;

[0090](3) After dropping the concen...

Embodiment 2

[0104] (1) Add water to the reaction kettle, and feed steam, control the temperature of the water to maintain at 81°C, and then continue to add the concentration (in the form of Na 2 (O represents) be the water glass solution of 2.60N and the vitriol oil, prepare the reaction bottom liquid that pH is 9.0, temperature remains constant during the preparation reaction bottom liquid, wherein the water glass total amount that uses in the precipitation reaction includes bottom liquid preparation the amount consumed in

[0105] (2) maintain the temperature of 81 DEG C to continue to be stable, add the water glass solution used for the concentrated sulfuric acid and the precipitation reaction dropwise to the reaction bottom liquid at the same time within 130min, so that the water glass and the concentrated sulfuric acid are precipitated and reacted, during the whole reaction stage Always keep the reaction temperature stable and the pH of the reaction system at 9.0;

[0106] (3) After...

Embodiment 3

[0120] (1) Add water to the reactor, and feed steam, control the temperature of the water to maintain at 75°C, and then continue to add the concentration (in the form of Na 2 (O represents) be 2.60N water glass solution and the vitriol oil, prepare the reaction bottom liquid that pH is 8.0, temperature remains constant during the preparation reaction bottom liquid, wherein the water glass total amount that uses in the precipitation reaction includes bottom liquid preparation the amount consumed in

[0121] (2) Keep the temperature of 75° C. continuously stable, add the water glass solution used for the water glass and the concentrated sulfuric acid dropwise in the reaction bottom liquid at the same time within 130min, so that the water glass and the concentrated sulfuric acid are precipitated, and during the whole reaction stage Always keep the reaction temperature stable and the pH of the reaction system at 8.0;

[0122] (3) After dropping the concentrated sulfuric acid and ...

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Abstract

The invention relates to a low hydroxyl content white carbon black and a preparation method of the low hydroxyl content white carbon black. The preparation method comprises the following steps: 1) preparing a reaction base solution with the pH of 7.0-10.5 at the temperature of 65-99 DEG C; 2) adding concentrated sulfuric acid and a sodium silicate solution to conduct a precipitation reaction, wherein the temperature of the precipitation reaction and the temperature of the reaction base solution are the same, keeping the pH of a system to 7.0-10.5 constant; 3) regulating the pH and post-processing to obtain the white carbon black. The white carbon black is low in hydroxyl content, the density of hydroxyl is less than 3 / nm<2>, the white carbon black is excellent in dispersity, the white carbon black is taken as a reinforcing agent to prepare a rubber, the excellent reinforcing effect is shown, the vulcanizing rate is increased, the vulcanizing time of the rubber material is shortened, and the processing performances and the mechanical property of a rubber compound are improved.

Description

technical field [0001] The invention belongs to the technical field of white carbon black preparation, and relates to a white carbon black and a preparation method thereof, in particular to a white carbon black with a low hydroxyl content and a preparation method thereof. Background technique [0002] As an excellent rubber reinforcing agent, silica has partially replaced carbon black in tire rubber. It can not only reduce the rolling resistance of tires, but the friction resistance of silica tread rubber is about 20% lower than that of carbon black tread rubber. It is beneficial to energy saving and environmental protection, and the wear resistance of the tire is improved, and the service life and safety of the tire are improved. [0003] However, there are a large number of hydroxyl groups on the surface of silica, and the polarity is strong. During the application process as a reinforcing agent, it is easy to agglomerate in the rubber matrix, thereby reducing the reinforc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/193C08K3/36C08L9/06
CPCC01B33/193C01P2006/12C08K3/36C08K2201/011C08L9/06
Inventor 陈南飞卢爱平王明贺
Owner WUXI HENGCHENG SILICON IND CO LTD
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