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Preparation method of styrene butadiene rubber liquid slurry added with white carbon black and product prepared by using same

A technology of styrene-butadiene rubber and silica, which is applied in the field of preparation of styrene-butadiene rubber liquid slurry, can solve the problems of small particle size of silica and poor dispersion of silica, and achieve the effect of improving mechanical properties

Active Publication Date: 2014-04-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with commonly used carbon black, the particle size of silica is smaller and the self-aggregation tendency is more serious. Therefore, the problem of poor dispersion of silica is very prominent in this application field

Method used

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  • Preparation method of styrene butadiene rubber liquid slurry added with white carbon black and product prepared by using same
  • Preparation method of styrene butadiene rubber liquid slurry added with white carbon black and product prepared by using same
  • Preparation method of styrene butadiene rubber liquid slurry added with white carbon black and product prepared by using same

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Experimental program
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Effect test

preparation example Construction

[0021] 1. Preparation of silica-water suspension

[0022] White carbon black and water are prepared according to the mass percentage of 5% to 20% under the action of ordinary stirring to prepare white carbon black water slurry, and the white carbon black water will be treated in a high-shear dispersing emulsifier for 2 to 5 hours to obtain Stabilized silica-water suspension.

[0023] 2. Surface treatment of silica

[0024] Put the white carbon black-water suspension in a water bath at 70-80°C, and gradually add KH550, KH570 or KH590 dropwise to the suspension according to the mass ratio of KH590 to white carbon black of 6%-10%. The functional groups loaded on the surface of the treated silica are beneficial to enhance the interfacial interaction between the silica and the rubber matrix, thereby improving the mechanical properties of the composite.

[0025] 3. Adjust the pH value of the silica-water suspension

[0026] Because the pH value is a main indicator of the stabilit...

Embodiment 1

[0031] Mix the silica and water with a mass percentage of 5:95, and then process the silica slurry in a high-shear dispersing emulsifier at a speed of 13,000rpm for 5 hours to obtain a stable silica-water suspension , the dispersion state of silica in water is good. Take 200g of silica-water suspension and 1g of KH5501g, and organically modify the silica-water suspension by adding KH590 dropwise in a water bath environment at 70°C, and the modification time in the water bath is 3h. Aqueous ammonia was added to the suspension to bring the pH of the suspension to 9. Get the styrene-butadiene latex 5000g that solid content is 20%, this suspension is joined in the styrene-butadiene latex, fully stirs and it is evenly mixed, and the obtained white carbon black content is 1phr (being white carbon black and styrene-butadiene latex dry glue mass Ratio of 1%) styrene-butadiene rubber liquid compound. The prepared silica-modified styrene-butadiene rubber was observed by TEM, and the d...

Embodiment 2

[0033] Mix the silica and water with a mass percentage of 5:95, and then process the silica slurry in a high-shear dispersing emulsifier at a speed of 13,000rpm for 5 hours to obtain a stable silica-water suspension , the dispersion state of silica in water is good. Take 600g of silica-water suspension and 3g of KH5703g, and organically modify the silica-water suspension by adding KH590 dropwise in a water bath environment at 70°C. The water bath modification time is 3h. Aqueous ammonia was added to the suspension to bring the pH of the suspension to 9. Get the styrene-butadiene latex 483.09g that solid content is 20.7%, this suspension is joined in the styrene-butadiene latex, fully stirs and it is uniformly mixed, and the obtained white carbon black content is 30phr (being that white carbon black and styrene-butadiene latex dry glue The mass ratio is 30%) of the styrene-butadiene rubber liquid compound. The prepared silica-modified styrene-butadiene rubber was observed by ...

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Abstract

The invention discloses a preparation method of styrene butadiene rubber liquid slurry added with white carbon black and a product prepared by using the same and relates to the technical field of performance improvement of high polymer composite materials such as rubber and the like. The slurry contains styrene butadiene latex and the white carbon black, wherein the mass ratio of the white carbon black to the styrene butadiene latex is 1-100%. The preparation method comprises the following steps: firstly, commonly stirring and premixing the white carbon black with water; then high shearing, dispersing and homogenizing the white carbon black water slurry to obtain a white carbon black-water suspension; subsequently, carrying out surface treatment on the white carbon black so that the surface of the white carbon black is organized; regulating the pH value of the suspension to 9-12; and finally, evenly mixing the suspension with the styrene butadiene latex to obtain the styrene butadiene latex liquid slurry added with the white carbon black. The white carbon black is uniformly dispersed in the slurry prepared by the method, thus the slurry can be directly processed to prepare a white carbon black modified styrene butadiene rubber; and the white carbon black modified styrene butadiene rubber with high filling fraction can also be used for the field of rubber reinforcing modification when serving as a filling material, and the mechanical property of the white carbon black modified styrene butadiene rubber is greatly improved.

Description

Technical field: [0001] The invention relates to the technical field of performance improvement of rubber composite materials, in particular to a preparation method of styrene-butadiene rubber liquid slurry added with white carbon black and a product thereof. Background technique: [0002] In recent years, with the emergence and promotion of "green tires", silica-reinforced rubber compounds have attracted more and more attention. The amount of silica is increasing almost every year. The reasons for the increase include reducing rolling resistance. Combine wet skid resistance for better fuel economy and extended tread life. However, compared with commonly used carbon black, the particle size of silica is smaller and the self-aggregation tendency is more serious. Therefore, the problem of poor dispersion of silica is very prominent in this application field. [0003] The styrene-butadiene rubber liquid slurry added with white carbon black is prepared by using the preparation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/08C08K9/06C08K3/36
Inventor 张立群奚梅梅叶欣吴友平桂燕董绪超杜丹超
Owner BEIJING UNIV OF CHEM TECH
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