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Rubber composition for tire tread, and preparation method thereof

A rubber composition and tire tread technology, applied in the field of rubber composition and its preparation, can solve problems such as uneven dispersion, low friction, and easy agglomeration of nano-silica, to achieve dispersion, improve compatibility, improve invasive effect

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 re-agglomeration of nano-silica during processing, but also solves the problem of poor bonding and uneven dispersion between nano-silica and rubber matrix, endowing the composition with high wear resistance and low friction , anti-wet performance

Method used

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  • Rubber composition for tire tread, and preparation method thereof
  • Rubber composition for tire tread, and preparation method thereof
  • Rubber composition for tire tread, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of grafted styrene-butadiene latex: In terms of mass parts of styrene-butadiene latex, first add 120 parts of deionized water in the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 2.0 parts of dodecylbenzenesulfonate Sodium acid, 0.3 parts of dodecyl mercaptan, after replacing with nitrogen, then add 5.8 parts of acrylamide (AM), stir and heat, add 0.2 parts of ammonium persulfate when the temperature of the polymerization kettle reaches 35 °C, and react for 3.5 hours Finally, 0.2 parts of diethylhydroxylamine was added to obtain grafted styrene-butadiene latex (SBR-g-MAA). Sampling analysis: the measured grafting rate of SBR-g-AM is 2.9%.

[0039] (2) Preparation of modified nano white carbon black:

[0040] a. Preparation of monomer pre-emulsion: In terms of mass parts of isoprene, 100 parts of isoprene, 6 parts of sodium dodecylbenzenesulfonate, 160 parts of deionized water, 1.2 parts of sodium carbonate, Put 0.01 part...

Embodiment 2

[0044] (1) Preparation of grafted styrene-butadiene latex: with embodiment 1.

[0045] (2) Preparation of modified nano white carbon black: with embodiment 1.

[0046] (3) Preparation of the styrene-butadiene rubber composition for tire tread: in parts by mass of styrene-butadiene latex SBR1500 (dry matrix), get 100 parts of styrene-butadiene latex SBR1500 and 2.0 parts of SBR-g-AM (grafting rate 2.9%), 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 20 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 vulcanization, and...

Embodiment 3

[0048] (1) Preparation of grafted styrene-butadiene latex: with embodiment 1.

[0049] (2) Preparation of modified nano white carbon black: with embodiment 1.

[0050] (3) Preparation of the styrene-butadiene rubber composition for tire tread: in parts by mass of styrene-butadiene latex SBR1500 (dry base), get 100 parts of styrene-butadiene latex SBR1500 and 3.0 parts of SBR-g-AM (grafting rate 2.9%), 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 vulcanization, and t...

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Abstract

The invention provides a rubber composition for a tire tread. A method comprises: modifying nano white carbon black by adopting aliphatic diisocyanate, then adding acrylamide to perform end-capping reaction, pre-emulsifying a conjugated diene monomer to perform in-situ polymerization with unsaturated bonds in acrylamide, forming a high-dispersion structure type barrier layer with high bonding strength on the surfaces of nano white carbon black particles, separating the nano white carbon black particles under the action of high temperature or high shearing, and then mixing and coagulating with butadiene styrene rubber latex under the action of grafted butadiene styrene rubber latex to prepare the high-performance rubber composition for the tire tread. The invention not only effectively solves the problem that re-agglomeration of nano white carbon black occurs easily during processing, but also solves the problem of poor bonding and uneven dispersion of nano white carbon black and a rubber matrix, and endows the composition with high abrasion resistance, low friction, and anti-slippery performance. 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): C08L9/06C08L51/04C08K9/10C08K3/36C08F279/02C08F220/56
CPCC08F279/02C08K2201/011C08L9/06C08L51/04C08K9/10C08K3/36C08F220/56
Inventor 徐典宏汤杰杨珊珊丛日新朱晶孟令坤郑红兵
Owner PETROCHINA CO LTD
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