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Preparation method of white carbon black modified styrene-butadiene rubber facing green tires and product thereof

A technology of styrene-butadiene rubber and silica, which is applied in special tires, tire parts, transportation and packaging, etc., can solve the problems that the physical properties of vulcanized rubber cannot reach the best state, cannot force silica to disperse, and achieve mechanical The effect of performance improvement

Active Publication Date: 2012-07-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the tendency of silica to aggregate, mechanical methods cannot force silica to disperse well in rubber, and the physical properties of vulcanized rubber cannot reach the best state.

Method used

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  • Preparation method of white carbon black modified styrene-butadiene rubber facing green tires and product thereof
  • Preparation method of white carbon black modified styrene-butadiene rubber facing green tires and product thereof
  • Preparation method of white carbon black modified styrene-butadiene rubber facing green tires and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. First prepare the styrene-butadiene rubber liquid slurry containing white carbon black:

[0022] Mix silica and water at a mass percentage of 5:95, and treat for 5 hours in a high-shear dispersing emulsifier at a rotational speed of 13,000 rpm to obtain a stable silica-water suspension, and the dispersion state of silica in water is good. Take 600g of silica-water suspension and 3g of KH590, and organically modify the silica-water suspension by adding KH550 dropwise in a water bath environment at 70°C. The water bath time is 3h, and fully stirred to ensure its modification effect . 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 evenly mixed, and the obtained white carbon black content is 30pHr (being white carbon black and styrene-butadiene latex dry glue The mass ratio is 30%) of t...

Embodiment 2

[0026] 1. First prepare the styrene-butadiene rubber liquid slurry containing white carbon black:

[0027] Mix silica and water at a mass percentage of 20:80, and treat for 2 hours in a high-shear dispersing emulsifier at a rotational speed of 22,000 rpm to obtain a stable silica-water suspension, and the dispersion state of silica in water is good. Take 200g of silica-water suspension and 2.4g of KH590, organically modify the silica-water suspension by adding KH570 dropwise in a water bath environment at 80°C, the water bath time is 2h, and stir fully to ensure its modification Effect. Aqueous ammonia was added to the suspension to bring the pH of the suspension to 12. 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 evenly mixed, and the obtained white carbon black content is 40pHr (being white carbon black and styrene-butadiene latex dry glue The mass ratio is the styrene-b...

Embodiment 3

[0031] 1. First prepare the styrene-butadiene rubber liquid slurry containing white carbon black:

[0032] Mix silica and water at a mass percentage of 10:90, and treat for 3 hours in a high-shear dispersing emulsifier at a rotational speed of 19,000 rpm to obtain a stable silica-water suspension, and the dispersion state of silica in water is good. Take 500g of silica-water suspension and 5g of KH590, and organically modify the silica-water suspension by adding KH590 dropwise in a water bath environment at 75°C. The water bath time is 2.5h, and stir fully to ensure its modification Effect. Aqueous ammonia was added to the suspension to bring the pH of the suspension to 10. 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 50pHr (being that white carbon black and styrene-butadiene latex dry glue The mass ratio is 5...

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Abstract

The invention provides a preparation method of white carbon black modified styrene-butadiene rubber facing green tires and a product thereof. White carbon black is used in the technical field of styrene-butadiene rubber modification, so as to provide guidance to the application of the white carbon black modified styrene-butadiene rubber in the tire industry. The styrene-butadiene rubber is characterized in that the styrene-butadiene rubber contains white carbon black of which the weight percentage to dry styrene-butadiene rubber latex is 30 percent to 100 percent. The preparation method comprises the steps that firstly, the white carbon black is mixed with water to obtain a white carbon black-water suspension; afterwards, the white carbon black-water suspension is subject to surface treatment, so as to enable the surface of the white carbon black to be organized; the pH (potential of hydrogen) value of the suspension is adjusted to be 9 to 12; and finally, the suspension is evenly mixed with the styrene-butadiene rubber latex to obtain liquid styrene-butadiene rubber sizing to which the white carbon black is added, and then the modified styrene-butadiene rubber containing the white carbon black is prepared by adopting an emulsion blending and flocculation process. The white carbon black modified styrene-butadiene rubber prepared by adopting the preparation method has the advantages that the white carbon black is evenly distributed in the styrene-butadiene rubber, and compared with pure styrene-butadiene rubber, the mechanical performance, the wet-skid resistant performanceand the rolling resistance of the white carbon black modified styrene-butadiene rubber are remarkably improved.

Description

Technical field: [0001] The present application relates to the technical field of modification of styrene-butadiene rubber, and more specifically relates to a preparation method and a prepared product of silica-modified styrene-butadiene rubber for green tires. Background technique: [0002] Silica-reinforced rubber compounds are attracting more and more attention, and the amount of silica is increasing almost every year. The reasons for the growth include: better fuel economy due to lower rolling resistance and longer tread life . However, due to the presence of highly polar hydroxyl groups on the surface of silica, silica is incompatible with rubber. Due to the tendency of silica to aggregate, mechanical methods cannot force silica to disperse well in rubber, and the physical properties of vulcanized rubber cannot reach the best state. [0003] The preparation method of the invention prepares the white carbon black modified styrene-butadiene rubber in a good dispersion s...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08K9/06C08K3/36B60C1/00
CPCY02T10/86
Inventor 张立群叶欣奚梅梅吴友平董绪超桂燕杜丹超
Owner BEIJING UNIV OF CHEM TECH
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