Tire provided with a sidewall comprising one or more thermoplastic elastomers and one or more synthetic diene elastomers
A thermoplastic elastomer and diene elastomer technology, applied in the field of elastomer layer and tire outer sidewall, can solve problems such as harmful effects of rubber products, and achieve the effects of cost reduction, good rolling resistance, and improved ozone resistance
Active Publication Date: 2022-03-25
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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Problems solved by technology
[0013] In particular, ozone is known to have a detrimental effect on rubber articles, often producing blooming on the surface of these articles and / or crack
Method used
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[0025] I-Definition
[0026] Within the meaning of the present invention, the expression "parts per hundred by weight of elastomer" (or phr) is understood to mean parts per hundred by weight of elastomer (whether it is a thermoplastic elastomer or not). In other words, thermoplastic elastomers are elastomers.
[0027] In this application, unless expressly stated otherwise, all percentages (%) shown are percentages (%) by weight.
[0028] Furthermore, any numerical interval represented by the expression "between a and b" represents a numerical range extending from greater than a to less than b (i.e. excluding the limits a and b), while any numerical interval represented by the expression "from a to b" Numerical intervals denote numerical ranges extending from a to b (ie including the strict limits of a and b). In the present application, when a numerical interval is indicated by the expression "from a to b", the interval indicated by the expression "between a and b" is prefe...
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Abstract
The invention relates to a tire provided with a sidewall comprising at least one composition based at least on: an elastomeric matrix comprising at least one diene, a crosslinking system and reinforcing fillers Elastomers and thermoplastic elastomers selected from the group consisting of butadiene polymers having a glass transition temperature less than or equal to -50°C, said thermoplastic elastomers comprising at least one elastomeric block and at least one thermoplastic block, wherein the thermoplastic elastomer does not include a polyisobutylene block, and the reinforcing filler includes a BET specific surface area less than or equal to 35m 2 / g of carbon black (called the first carbon black) and BET specific surface area greater than or equal to 35m 2 / g of carbon black (called the second carbon black).
Description
technical field [0001] The present invention relates to tyres, and more particularly to the tyre's sidewall, that is to say, by definition, to the layer of elastomer located radially on the outside of the tyre, in contact with the ambient air. Background technique [0002] Three types of areas can be defined within the tire: [0003] - the radially outer region in contact with ambient air, which substantially consists of the tread and the outer sidewall of the tyre. The sidewall is the layer of elastomer located outside the carcass reinforcement with respect to the inner cavity of the tyre, between the crown and the bead, so as to completely or partially cover the area of the carcass reinforcement extending from the crown to the bead. [0004] - the radially inner region in contact with the inflation gas, which generally consists of a layer (sometimes called an inner liner) that is airtight to the inflation gas. [0005] - The inner zone of the tyre, that is to say the z...
Claims
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IPC IPC(8): B60C1/00C08L9/00C08L53/00C08K3/04
CPCB60C1/0025C08L9/00C08L53/02C08L91/00C08L91/06C08K5/47C08K5/18C08K5/09C08K3/22C08K3/06C08K3/04C08K5/3437
Inventor D·冈萨雷斯C·肖韦尔
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN