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Rubber composition for tire tread and preparation method thereof

A technology of rubber composition and tire tread, which is applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of unevenness, low friction, easy agglomeration and dispersion, etc., and achieves a simple and easy preparation method and no environment. Contamination, slip prevention effect

Active Publication Date: 2019-01-18
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 and uneven dispersion of nano-silica, but also overcomes the problem that the highly dispersed structure on the surface of nano-silica is detached and re-agglomerated under high-temperature, high-shear processing conditions , giving the rubber composition the properties of anti-wet skid, high wear resistance and low friction

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

[0033] (1) Preparation of modified nano white carbon black:

[0034] a. Preparation of monomer pre-emulsion: In terms of mass parts of styrene, 100 parts of styrene, 1 part of sodium dodecylbenzenesulfonate, 100 parts of deionized water, 1.0 part of sodium hydroxide, 0.01 part of Potassium sulfate was put into the reactor together, and when the temperature was raised to 40°C, the mixture was stirred and reacted for 30 minutes to prepare styrene pre-emulsion a.

[0035] b. Preparation of compounded polar monomer mixture: 100 parts of methyl methacrylate and 15 parts of acrylamide were put into a reaction kettle and stirred and mixed for 5 minutes based on the mass parts of methyl methacrylate (MMA); Add 50 parts of deionized water and 1 part of sodium hydroxide, and stir and mix for 10 minutes to form a compound polar monomer mixture a (pH of the mixture a=7.2).

[0036] C. Preparation of modified nano-silica: In terms of mass parts of nano-silica, get 100 parts of nano-silica...

Embodiment 2

[0039] (1) Preparation of modified nano white carbon black:

[0040] a. Preparation of monomer pre-emulsion: same as Example 1.

[0041] b. Preparation of compounded polar monomer mixture: same as in Example 1.

[0042] C. Preparation of modified nano-silica: according to the mass parts of nano-silica, get 100 parts of nano-silica (40nm) and 10 parts of polar monomer mixed solution a, 260 parts of deionized water, 2.0 parts Add sodium hydroxide into the polymerization kettle and stir and mix for 20 minutes; then add 2 parts of sodium dodecylbenzenesulfonate and 2.0 parts of styrene pre-emulsion a, stir and raise the temperature to 65°C, and then stir and mix for 25 minutes to form nano-silica The seed of the compound emulsion with the powder as the center; then add 15 parts of styrene pre-emulsion a and 0.13 parts of potassium persulfate, after reacting for 4.0 hours, finally add 0.2 parts of diethylhydroxylamine, wash, dehydrate, dry and grind Prepared modified nano white c...

Embodiment 3

[0045] (1) Preparation of modified nano white carbon black:

[0046] a. Preparation of monomer pre-emulsion: same as Example 1.

[0047] b. Preparation of compounded polar monomer mixture: same as in Example 1.

[0048] C. Preparation of modified nano-silica:: according to the mass parts of nano-silica, get 100 parts of nano-silica (40nm) and 12 parts of polar monomer mixed solution a, 270 parts of deionized water, 2.0 Add 1 part of sodium hydroxide to the polymerization kettle and stir and mix for 20 minutes; then add 3 parts of sodium dodecylbenzenesulfonate and 2.5 parts of styrene pre-emulsion a, stir and heat up to 65 ° C, and then stir and mix for 25 minutes to generate nano white carbon The seeds of the composite emulsion centered on the black powder; then add 18 parts of styrene pre-emulsion a and 0.13 parts of potassium persulfate, after reacting for 4.0 hours, finally add 0.2 parts of diethylhydroxylamine, wash, dehydrate, dry, Grinding to obtain modified nano whit...

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Abstract

The invention aims to provide a rubber composition for a tire tread. A method comprises: compounding an unsaturated acrylic acid ester polar monomer and an acrylamide polar monomer, pre-emulsifying a dithienylethene monomer, preparing modified nano white carbon black with an in-situ polymerization method, and then directly mixing and coagulating with butadiene styrene rubber latex to prepare the high-performance rubber composition for the tire tread. The invention not only effectively solves the problems of high possibility of agglomeration and uneven dispersion of nano white carbon black but also overcomes the problem that the highly dispersed structure of the surface of the nano white carbon black separates to re-agglomerate under high-temperature and high-shearing processing conditions, so that the rubber composition is endowed with anti-slippery performance, high-wearing resistance, and low friction 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, with the successive implementation of EU REACH regulations and tire labeling laws, the environmental protection of synthetic rubber is imminent, coupled with the demand for light-colored products, the application research of silica has attracted people's attention. Nano-silica, commonly known as white carbon black, is the second largest reinforcing agent in the rubber industry after carbon black. Since the 1990s, silica has been widely used as a reinforcing filler in tire tread formulations, so that the above-mentioned "devil triangle" performance required by tire treads can be more clearly balanced. However, the nano-silica particle size is small, the specific surface is large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/08C08K9/10C08K3/36C08C1/15B60C1/00
CPCB60C1/0016C08C1/15C08K3/36C08K9/10C08K2201/003C08K2201/011C08L9/08
Inventor 徐典宏李彦融王玲玲朱晶孟令坤赵洪国燕鹏华
Owner PETROCHINA CO LTD