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Tire tread

A technology of tread and rubber composition, applied in the direction of tire tread/tread pattern, special tire, tire parts, etc., can solve the problems of offset drop, compromise, etc.

Inactive Publication Date: 2014-06-25
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Changing the tire design to improve one characteristic of the tire often results in a trade-off, i.e. an offsetting decrease in another tire characteristic

Method used

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  • Tire tread

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] Two successive stages of preparation (a first stage of thermomechanical processing at high temperature followed by a second stage of mechanical processing at a lower temperature) can generally be used, in a manner known to those skilled in the art at suitable A rubber composition as an example of the present invention was prepared in a mixer of .

[0062] The first stage of thermomechanical processing (sometimes referred to as the "non-production" stage) is intended to thoroughly mix by kneading the various ingredients of the composition, except the vulcanization system. This stage is carried out in suitable kneading equipment (such as internal mixers or extruders) until, under the action of mechanical processing and high shear applied to the mixture, a temperature of usually between 120°C and 190°C is reached, preferably Narrowly the maximum temperature is between 130°C and 170°C.

[0063] After the mixture has cooled, a second stage of mechanical processing is carrie...

example 1

[0077] Rubber compositions were prepared using the components shown in Table 1. The amounts of each component constituting the rubber composition shown in Table 1 are given in parts by weight per 100 parts by weight of rubber (phr). The microstructure and glass transition temperature of each S-SBR are also provided in Table 1.

[0078] The terpene resin was SYLVARES TR-5147, a polylimonene resin available from Arizona Chemical, Savannah, GA. The plasticizing oil is naphthenic and / or sunflower oil. Silica is ZEOSIL160, that is, BET is 160m 2 / g of highly dispersible silica available from Rhodia. The plasticizing oil is AGRI-PURE80. The silane coupling agent was X50-S available from Evonik Degussa. The cure package contains sulfur, accelerators, zinc oxide and stearic acid.

[0079] Table 1 - Rubber Formulation

[0080] formula

F1

F2

F3

F4

S-SBR

100

100

100

100

Tg, ℃

-12

-24

-48

-65

Styrene, wt....

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Abstract

Treads and tires having such treads having improved characteristics breaking the compromise between wear and wet braking, such treads manufactured from a rubber composition that may include greater than 90 phr of an elastomer component selected from styrene-butadiene rubber (SBR), a polybutadiene or combinations thereof having, a glass transition temperature of between -100 DEG C and less than -50 DEG C and a plasticizing system. The plasticizing system may include, for example, between 5 phr and 120 phr of a plasticizing resin having a Tg of -at least 25 DEG C and between 0 phr and 60 phr of a plasticizing liquid. Particular embodiments may include the elastomer component having a Tg of between -90 DEG C and -60 DEG C and / or may further have the elastomer component included in an amount of at least 95 phr.

Description

technical field [0001] The present invention relates generally to vehicle tires, and more particularly to tire treads and materials from which tire treads are made. Background technique [0002] It is known in the industry that tire designers must often compromise certain characteristics of the tires they design. Changing the tire design to improve one property of the tire often results in a trade-off, ie, an offsetting decrease in another tire property. One such tradeoff exists between tire wear and wet braking. Tire wear can be improved by increasing the amount of polybutadiene blended into the rubber composition of the tread. However, increasing the polybutadiene content in the rubber composition of the tread generally leads to a loss of wet braking performance, which is known to be improved, for example, by reducing the polybutadiene content of the tire tread. [0003] Tire designers and those conducting research in the tire industry seek materials and tire structures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00
CPCB60C1/0016C08K5/0016C08L9/06C08L9/00B60C11/0008B60C2011/0025C08L47/00
Inventor R·斯塔布菲尔德X·圣蒂尼
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN