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Rubber composition for tire tread and preparation method of rubber composition

A technology of rubber composition and tire tread, which is applied to special tires, tire parts, vehicle parts, etc., and can solve problems such as uneven dispersion, poor bonding between nano-silica and rubber matrix, and easy agglomeration

Active Publication Date: 2017-10-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention not only effectively solves the problem of easy agglomeration of nano-silica, but also solves the problem of poor bonding between nano-silica and rubber matrix and uneven dispersion, and endows the composition with high wear resistance, low friction, and anti-wet skid properties. performance

Method used

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  • Rubber composition for tire tread and preparation method of rubber composition
  • Rubber composition for tire tread and preparation method of rubber composition
  • Rubber composition for tire tread and preparation method of rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of grafted styrene-butadiene latex: according to the mass parts of styrene-butadiene latex SBR1500, first add 120 parts of deionized water in the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 2.0 parts of dodecylbenzene Sodium sulfonate, 0.3 parts of dodecyl mercaptan, after replacing with nitrogen, then add 5.5 parts of MAA, stir and heat, add 0.2 parts of ammonium persulfate when the temperature of the polymerization kettle reaches 35 °C, react for 3.5 hours, add 0.2 parts of diethylhydroxylamine to prepare grafted styrene-butadiene latex (SBR-g-MAA). Sampling analysis: the measured grafting rate of SBR-g-MAA was 2.1%.

[0036] (2) Preparation of modified nano-silica: according to the mass parts of nano-silica, 100 parts of nano-silica and 220 parts of deionized water were added to the polymerization kettle and stirred and mixed for 15 minutes; Methyl diisocyanate (HDI), 1.2 parts of sodium hydroxide, stir and heat up t...

Embodiment 2

[0039] (1) Preparation of grafted styrene-butadiene latex: with embodiment 1.

[0040] (2) Preparation of modified nano white carbon black: with embodiment 1.

[0041] (3) Preparation of the styrene-butadiene rubber composition for tire tread: according to the mass parts of styrene-butadiene latex SBR1500 (dry matrix), get 100 parts of styrene-butadiene latex SBR1500 and 2.0 parts of SBR-g-MAA (grafting rate 2.1%), 3.0 parts of sodium dodecylbenzenesulfonate, and 230 parts of deionized water were added to the coagulation kettle and stirred and mixed for 15 minutes, then 30 parts of modified nano-silica were added, and the pH value of the system was adjusted with sodium bicarbonate 8.5, when the temperature is raised to 60°C, stir and mix for 40 minutes, then add 3.5 parts of hydrochloric acid for coagulation, and finally wash, dehydrate, dry, and briquette to obtain a styrene-butadiene rubber composition for tire treads. Sampling analysis: standard samples were made by vulcan...

Embodiment 3

[0043] (1) Preparation of grafted styrene-butadiene latex: according to the mass parts of styrene-butadiene latex SBR1500, first add 150 parts of deionized water in the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 5.0 parts of dodecylbenzene Sodium sulfonate, 0.5 parts of dodecyl mercaptan, after replacing with nitrogen, then add 7 parts of MAA, stir and heat, add 0.3 parts of ammonium persulfate when the temperature of the polymerization kettle reaches 35 °C, react for 3.5 hours, add 0.4 parts of diethylhydroxylamine to prepare grafted styrene-butadiene latex (SBR-g-MAA). Sampling analysis: the measured grafting rate of SBR-g-MAA was 2.9%.

[0044] (2) Preparation of modified nano-silica: according to the mass parts of nano-silica, 100 parts of nano-silica and 300 parts of deionized water were added to the polymerization kettle and stirred for 20 minutes; Methyl diisocyanate (HDI), 1.4 parts of sodium hydroxide, stir and heat up to 50°C, and ...

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Abstract

The invention provides rubber composition which is used for a tire tread and prepared from modified nano-silica filled butadiene styrene rubber. Nano-silica is modified with aliphatic diisocyanate, then water-soluble polymers are added for a grafting reaction, a barrier layer with a high dispersion structure is formed on surfaces of nano-silica particles for preparation of modified nano-silica, the modified nano-silica and butadiene styrene rubber are mixed and coagulated, and the high-performance rubber composition for tire tread rubber is prepared. The problem that nano-silica is prone to agglomeration is effectively solved, the problems that nano-silica has poor binding force with a rubber matrix and is non-uniform in dispersion are solved, and the composition has high wear resistance, low friction and wet-skid resistance. The invention further provides a preparation method of the composition.

Description

technical field [0001] The invention relates to a rubber composition and a preparation method thereof, in particular to a modified white carbon black-filled styrene-butadiene rubber rubber composition used for tire treads and a preparation method thereof. Background technique [0002] As we all know, from the perspective of the expected effect of inorganic powder filling modified rubber, the smaller the particle size of the inorganic powder particles, the better the effect of modification, but it is inevitable in the application process of ultrafine inorganic powder Encountered a technical problem, that is, as the particle size decreases, the specific surface area of ​​ultrafine powder increases, the surface energy increases, and the self-aggregation ability is stronger, so it is more difficult for the ultrafine powder to be mixed, infiltrated and dispersed by rubber materials. Therefore, the dispersion of ultrafine inorganic powder in rubber has become a bottleneck in the p...

Claims

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Application Information

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IPC IPC(8): C08L9/08C08L51/04C08K9/10C08K9/08C08K3/36C08F279/02C08F220/06B60C1/00
CPCB60C1/0016C08F279/02C08K2201/003C08K2201/011C08L9/08C08L51/04C08K9/10C08K9/08C08K3/36C08F220/06
Inventor 徐典宏魏玉丽赵洪国丛日新朱晶孟令坤郑红兵
Owner PETROCHINA CO LTD
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