Rubber composition for tire tread

A technology of rubber composition and tire tread, which is applied to special tires, tire parts, transportation and packaging, etc., and can solve problems such as inability to carry out, improvement in grip performance, lagging of rubber composition reinforcement, etc.

Active Publication Date: 2013-06-12
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the powder is insoluble under the conditions in which the tire is used, the above-mentioned functions (microporosity and creation of channels for draining water) cannot be performed, and the grip cannot be improved
However, the known disadvantages of these solutions are that they are detrimental to the reinforcement of the rubber compositions (and thus to their wear resistance) or to their hysteresis (and thus to their rolling resistance)

Method used

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  • Rubber composition for tire tread
  • Rubber composition for tire tread

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Embodiment Construction

[0020] In this specification, unless otherwise specified, all percentages (%) shown are percentages by weight.

[0021] Furthermore, any numerical interval represented by the expression "between a and b" represents a numerical range from greater than a to less than b (i.e. excluding the limits a and b), while any numerical interval represented by the expression "a to b" A range of values ​​from a to b (ie including the strict limits a and b) is intended.

[0022] The rubber composition of the present invention is based on at least one diene elastomer, a liquid plasticizer, reinforcing fillers and fine particles of a water-soluble alkali metal or alkaline earth metal sulfate, these components being described in detail below.

[0023] The expression "based on" should of course be understood as meaning a composition comprising a mixture of the individual components used, or, if any, their reaction products, some of which are particularly capable of being used in the individual co...

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Abstract

The invention relates to a rubber composition that can be used as a tire tread having improved adhesion on melting ice, comprising at least one diene elastomer such as natural rubber and / or a polybutadiene, more than 30 pce of a liquid plasticizer, between 50 and 150 pce of a reinforcing filler such as silica or carbon black, and between 2 and 40 pce of microparticles of a water-soluble sulfate of an alkali or alkali earth metal such as a magnesium sulfate, wherein said composition is characterized in that the volumetric microparticle size distribution, measured by laser grading as per ISO Standard 13320-1, satisfies the following relations:50[mu]m(D50(150[mu]m:-0.50(Span(1.50, wherein D50 is the diameter of the median particle corresponding to 50% of the cumulative distribution of particles; Span=(D90-D10) / D50; wherein D10 and D90 are the diameters of the particle corresponding to 10% and to 90%, respectively, of the cumulative particle distribution. The invention also relates to tire treads incorporating such a composition, as well as to said tires themselves.

Description

technical field [0001] The present invention relates to rubber compositions useful as treads for tires, in particular "winter tires" capable of rolling on ground covered with ice or black ice without the provision of studs (also called studless tires). [0002] More particularly, the present invention relates to tire treads that are particularly suitable for rolling under "thawing" conditions generally encountered in the temperature range between -5°C and 0°C. Particular attention should be paid to the fact that in this range, the pressure of the tires during the passage of the vehicle brings the surface of the ice to melt, and the ice is covered with a thin layer of water, which is not conducive to the grip of these tires. Background technique [0003] In order to avoid the detrimental effect of the studs, in particular their strong abrasive action on the pavement of the ground itself and its significantly damaging road behavior on dry road surfaces, tire manufacturers hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00C08K3/30C08K5/00
CPCB60C1/0016C08K3/30C08K5/0016C08K5/548C08L21/00
Inventor 前阪将之S·帕加诺渡边麻起子
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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