A kind of preparation method of highly dispersed precipitated white carbon black

A high-dispersion technology of precipitated silica, applied in the direction of fibrous fillers, dyed organic silicon compounds, etc., can solve the problems of unfavorable industrialization and rising production costs, and achieve the goals of reducing surface energy, improving processing performance, and reducing rolling resistance Effect

Active Publication Date: 2017-11-28
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding water-soluble polymers to the reaction can only produce silica with high purity by supercritical drying process, which leads to an increase in production costs and is not conducive to industrialization

Method used

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  • A kind of preparation method of highly dispersed precipitated white carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Preparation of umbrella-shaped siloxane dispersant

[0025] The trisiloxane surfactant of 271 grams is joined in the n-butyl acrylate of 172 grams, then adding concentration is 1.2 grams of chloroplatinic acid of 5wt%, the reaction temperature is raised to 85 ℃, and the reaction time is 1 hour, obtained Umbrella silicone coupling agent.

[0026] 2) Preparation of highly dispersed precipitated silica

[0027] Add 100 grams of precipitated white carbon black into 900 grams of absolute ethanol and stir to obtain a uniformly dispersed suspension of white carbon black. Add 10 grams of the umbrella-shaped silicone dispersant prepared in the above step 1) and 10 grams of mercaptotrimethoxysilane coupling agent to the suspension, and then add 4 grams of p-toluenesulfonic acid to adjust the pH of the solution to 4. Then the prepared solution was placed in a water bath and heated to 50°C. React for 4 hours and cool to room temperature. The ethanol solvent is removed by rot...

Embodiment 2

[0029] The difference from Example 1 is:

[0030] Add 100 grams of precipitated white carbon black into 900 grams of absolute ethanol and stir to obtain a uniformly dispersed suspension of white carbon black. 15 grams of the umbrella-shaped silicone dispersant prepared in the above step 1) and 5 grams of vinyltrimethoxysilane coupling agent were added to the suspension, and then 4 grams of sulfuric acid was added to adjust the pH value of the solution to 5. The prepared solution was then placed in a water bath and heated to 79°C. React for 1 hour, cool to room temperature, and then remove the ethanol solvent by rotary evaporation, then dry, pulverize, and finally obtain the final high-dispersion precipitated white carbon black.

Embodiment 3

[0032] 1) Preparation of umbrella-shaped siloxane dispersant

[0033] The trisiloxane surfactant of 271 grams is joined to the α olefin of 286 grams C14-C18, then adding concentration is 1.2 grams of chloroplatinic acid of 5wt%, the temperature of reaction is raised to 75 ℃, and the reaction time is 2 hours, preparation Obtain umbrella-shaped siloxane coupling agent.

[0034] 2) Preparation of highly dispersed precipitated silica

[0035] Add 100 grams of precipitated white carbon black into 900 grams of absolute ethanol and stir to obtain a uniformly dispersed suspension of white carbon black. Add 5 grams of the umbrella-shaped silicone dispersant prepared in the above step 1) and 15 grams of mercaptotrimethoxysilane coupling agent to the suspension, and then add 4 grams of p-toluenesulfonic acid to adjust the pH value of the solution to 6. Then the prepared solution was placed in a water bath and heated to 30°C. React for 6 hours, cool to room temperature, then remove the...

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Abstract

The invention relates to a preparation method of white carbon black, in particular to a preparation method of highly dispersed precipitated white carbon black. Mix silica suspension, umbrella-shaped siloxane dispersant and siloxane coupling agent containing mercapto or carbon-carbon double bond, adjust the pH value to 2-7 after mixing, heat to 30-79°C, and react 1 -6 hours to obtain the high-dispersion precipitated silica; wherein, umbrella-shaped siloxane dispersant and silica suspension are mixed in a ratio of 1:1-1:20 by mass ratio; siloxane coupling The agent and the silica suspension are also mixed in a mass ratio of 1:1-1:20. The white carbon black prepared by the present invention has super hydrophobicity, and can effectively improve the processing performance of the subsequent rubber compound, effectively improve the dynamic mechanical properties of the vulcanized rubber as tire tread rubber, and effectively reduce the The rolling resistance of the rubber improves the wear resistance of the tread rubber.

Description

technical field [0001] The invention relates to a preparation method of white carbon black, in particular to a preparation method of highly dispersed precipitated white carbon black. Background technique [0002] White carbon black is the general term for white powdery silicic acid and silicate products, mainly refers to precipitated silica, fumed silica, ultrafine silica gel and aerogel, and also includes powdered synthetic aluminum silicate and calcium silicate etc. Precipitated silica is widely used as a reinforcing filler material in elastic or rubber materials. For example, they have been used as white reinforcing agents in vehicle tires. In order to make the performance of tire rubber good, silica must have a high binding effect with rubber molecules and have good dispersion in tire rubber. [0003] Compared with fumed silica, ordinary precipitated silica has the advantage of low cost. However, because precipitated silica contains a large amount of silanol and has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/28C09C3/12
Inventor 李嵬刘冬雪王新王元霞
Owner SHENYANG RES INST OF CHEM IND
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