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High-dispersity white carbon black and preparation method thereof

A white carbon black, mass fraction technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as poor processing performance and poor dispersion performance, and achieve the effect of improving dispersion performance

Active Publication Date: 2018-02-16
WUXI HENGCHENG SILICON IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Unfortunately, silica, which has a relatively high specific surface area, has good wear resistance in rubber but poor dispersibility, resulting in poor processability consequences when used in tire rubber

Method used

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  • High-dispersity white carbon black and preparation method thereof
  • High-dispersity white carbon black and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The present embodiment provides a kind of method for preparing white carbon black, and its specific method is:

[0062] (1) Preparation of reaction bottom liquid: add water to the reaction kettle, use oil bath heating to control the temperature of water at 88°C, add a certain amount of water glass solution, prepare a reaction bottom liquid with a water glass concentration of 0.09mol / L, and then Add the dehydrated alcohol of 0.7% (accounting for the percentage of reaction bottom liquid mass) wherein, stir evenly, and keep its temperature constant at 88 ℃, wherein, the water glass total amount that uses in the described precipitation reaction includes consumption in the preparation of bottom liquid amount.

[0063] (2) Reaction stage: in the reaction bottom liquid of step (1), add the concentrated sulfuric acid and water glass solution simultaneously, carry out reaction, keep stirring during; Wherein, in the whole reaction stage, reaction temperature remains constant, and...

Embodiment 2

[0075] The present embodiment provides a kind of method for preparing white carbon black, and its specific method is:

[0076] (1) Preparation of reaction bottom liquid: add water to the reaction kettle, use oil bath heating to control the temperature of water at 80°C, add a certain amount of water glass solution, prepare a reaction bottom liquid with a water glass concentration of 0.11mol / L, and then Add the dehydrated alcohol of 1.55% (accounting for the percentage of reaction bottom liquid quality) wherein, stir evenly, and keep its temperature constant at 80 ℃, wherein, the water glass total amount that uses in the described precipitation reaction includes consumption in the preparation of bottom liquid amount.

[0077] (2) Reaction stage: in the reaction bottom liquid of step (1), add the concentrated sulfuric acid and water glass solution simultaneously, carry out reaction, keep stirring during; Wherein, in the whole reaction stage, reaction temperature remains constant,...

Embodiment 3

[0089] The present embodiment provides a kind of method for preparing white carbon black, and its specific method is:

[0090] (1) Preparation of reaction bottom liquid: add water to the reaction kettle, use oil bath heating to control the temperature of water at 75°C, add a certain amount of water glass solution, prepare a reaction bottom liquid with a water glass concentration of 0.20mol / L, and then Add the dehydrated alcohol of 2.8% (accounting for the percentage of reaction bottom liquid quality) wherein, stir evenly, and keep its temperature constant at 75 ℃, wherein, the water glass total amount that uses in the described precipitation reaction includes consumption in the bottom liquid preparation amount.

[0091] (2) Reaction stage: in the reaction bottom liquid of step (1), add the concentrated sulfuric acid and water glass solution simultaneously, carry out reaction, keep stirring during; Wherein, in the whole reaction stage, reaction temperature remains constant, and...

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Abstract

The invention provides high-dispersity white carbon black and a preparation method thereof. The preparation method comprises the following steps: (1) heating water, adding water glass, then adding ethyl alcohol, and mixing the water, the water glass and the ethyl alcohol to obtain a reaction base solution, wherein the temperature in the whole process does not change, the concentration of the waterglass is 0.01 to 1.00 mol / L, and the mass percentage of the ethyl alcohol is 0.1 to 5 weight percent; (2) simultaneously adding acid and water glass into the reaction base solution for mixing for reaction, thereby obtaining white carbon black suspension, wherein the reaction temperature is kept constant and is equal to that of the reaction base solution, and the concentration of the water glass is kept constant and is equal to that of the reaction base solution; (3) stopping adding the water glass into the white carbon black suspension, and independently adding acid to adjust the pH of a reaction system to 3.0 to 5.0, thereby obtaining acidified white carbon black suspension; (4) carrying out solid-liquid separation on the acidified white carbon black suspension to obtain a filter cake, thereby obtaining the white carbon black. The white carbon black provided by the invention is extremely high in dispersivity, and shows a good rubber reinforcing effect.

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 highly dispersible white carbon black and a preparation method thereof. Background technique [0002] Precipitated silica acts as a reinforcing agent in rubber tires, especially green tires and truck tires. In order to reduce the rolling resistance of tires, reduce heat generation, and improve wear resistance, precipitated silica is essential. With the implementation of the EU labeling law and the increasingly severe environment, the use of precipitated silica in rubber tires is increasing. [0003] However, there are a large number of hydroxyl groups on the surface of silica, and the primary particle size of silica with a high specific surface area is small. During the application process as a reinforcing agent, it is easy to agglomerate in the rubber matrix, and the dispersion in the ...

Claims

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Application Information

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IPC IPC(8): C01B33/193C08K3/36
CPCC01B33/193C01P2004/61C01P2004/62C01P2006/12C01P2006/19C08K3/36
Inventor 陈南飞卢爱平王明贺
Owner WUXI HENGCHENG SILICON IND CO LTD
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