Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Generale Des Establissements Michelin

Michelin Recherche Et Techniques S.a.

Christophe Chouvel

Vincent Abad

Emmanuel Custodero

Sébastien Rigo

José-Carlos Araujo Da Silva

Marc Greiveldinger

Fabien Hellot

Baptiste Foglieni

Christopher Pappas

David Gonzalez

Described are articles including treads and/or other tire components that are formed at least in part by rubber compositions having solid agglomerated material comprising disaggregated carbon nanotubes. Such rubber compositions include a diene rubber component and a solid agglomerated material comprising disaggregated carbon nanotubes that consist of a continuous network of carbon nanotubes that contains 1) voids and 2) aggregates of carbon nanotubes having a mean size dof less than 5 &#x3bc;m, the voids and the aggregates together in an amount that is less than 60% of a predetermined surface area, as determined by electron microscopy imagery analysis, the remainder being the disaggregated carbon nanotubes in the continuous network that do not comprise a clearly defined shape.

Rubber compositions with dissagregated carbon nanotubes

A tire is provided with an external sidewall, said external sidewall comprising a composition based on at least one elastomeric matrix comprising at least one diene elastomer selected from the group consisting of butadiene polymers having a glass transition temperature of less than or equal to &#x2212;50&#xb0; C., and a thermoplastic elastomer comprising at least one elastomer block and at least one thermoplastic block, the thermoplastic elastomer not comprising a polyisobutylene block; a liquid plasticizer exhibiting a glass transition temperature of less than &#x2212;70&#xb0; C.; a crosslinking system; and a reinforcing filler.

Tire provided with an outer sidewall comprising a liquid plasticizer having a low glass transition temperature

A tire has an outer sidewall, said outer sidewall comprising at least one composition based on an elastomeric matrix comprising: one or more thermoplastic elastomers comprising at least one elastomer block and at least one thermoplastic block, the elastomer block(s) not denoting one or more polyisobutylene blocks; and one or more synthetic diene elastomers selected from butadiene polymers having a glass transition temperature of less than or equal to &#x2212;50&#xb0; C.; said composition comprising at least one crosslinking system and one or more reinforcing fillers.

Tire provided with an outer sidewall comprising one or more thermoplastic elastomers and one or more synthetic diene elastomers

A tire has an outer sidewall, said outer sidewall comprising at least one composition comprising an elastomeric matrix which predominantly comprises by weight one or more thermoplastic elastomers comprising at least one elastomer block and at least one thermoplastic block, the elastomer block(s) being saturated.

Tire provided with an outer sidewall comprising a thermoplastic elastomer comprising at least one saturated elastomer block

A tire comprises a tread, a crown with a crown reinforcement, two sidewalls, two beads, a carcass reinforcement anchored to the two beads and extending from one sidewall to the other, characterized in that the tread comprises a composition based on at least a diene elastomer, at a content of between 35 and 99 phr (parts by weight per hundred parts of elastomer), a thermoplastic elastomer, at a content of between 1 and 65 phr, and a thermoplastic resin comprising optionally substituted polyphenylene ether units, said thermoplastic elastomer being a block copolymer comprising at least one elastomer block of optionally hydrogenated butadiene/styrene random copolymer type and at least one thermoplastic block of styrene type.

Tire provided with a tread comprising a diene elastomer, a thermoplastic elastomer and a thermoplastic resin having polyphenylene ether patterns

A tire comprises a tread, a crown with a crown reinforcement, two sidewalls, two beads, a carcass reinforcement anchored to the two beads and extending from one sidewall to the other, characterized in that the tread comprises a composition based on at least a diene elastomer, at a content of between 35 and 99 phr (parts by weight per hundred parts of elastomer), a thermoplastic elastomer system, at a total content of between 1 and 65 phr, said thermoplastic elastomer system comprising at least two block copolymers, referred to as polystyrene and poly(butadiene/styrene) block copolymers, each comprising at least one elastomer block of optionally hydrogenated butadiene/styrene random copolymer type, and at least one thermoplastic block of styrene type, one of the two polystyrene and poly(butadiene/styrene) block copolymers being hydrogenated such that a proportion ranging from 95 to 100 mol % of the double bonds in the butadiene portion is hydrogenated, the latter being referred to as an essentially hydrogenated polystyrene and poly(butadiene/styrene) block copolymer.

Tire provided with a tread comprising a diene elastomer and thermoplastic elastomer system

The present invention relates to a tire comprising a tread, a crown with a crown reinforcement, two sidewalls, two beads, a carcass reinforcement anchored to the two beads and extending from one sidewall to the other, in which the tread comprises at least one thermoplastic elastomer, said thermoplastic elastomer being a block copolymer comprising at least one elastomer block of optionally hydrogenated butadiene/styrene random copolymer type and at least one thermoplastic block of styrene type, and the total content of thermoplastic elastomer being within a range varying from 65 to 100 phr (parts by weight per hundred parts of elastomer).

Tire provided with a tread comprising a thermoplastic elastomer

A tire tread comprises a composition based on at least an elastomer matrix comprising a polyisoprene and an unsaturated thermoplastic styrene elastomer which represents at most 50% by weight of the elastomer matrix, a reinforcing filler and a crosslinking system. The unsaturated thermoplastic styrene elastomer comprises at least one rigid styrene segment and at least one flexible isoprene segment, which at least one flexible isoprene segment has a glass transition temperature of less than &#x2212;20&#xb0; C. Such a tread exhibits an improved resistance to crack propagation.

Tire tread comprising a thermoplastic elastomer

Composite reinforcer (R-) capable of adhering directly to a diene rubber matrix, which can be used as reinforcing element for a tire, having one or more reinforcing thread(s) (); a first layer () of a thermoplastic polymer, the glass transition temperature of which is positive covering individually the thread or several threads; a second layer () of a composition having a poly(p-phenylene ether) ('PPE') and a functionalized unsaturated thermoplastic styrene ('TPS') elastomer, the glass transition temperature of which is negative, the elastomer bearing functional groups selected from epoxide, carboxyl, acid anhydride and acid ester groups, in particular an epoxidized SBS elastomer, covering the first layer (). Process for manufacturing a composite reinforcer and rubber article or semi-finished product, especially a tire, incorporating such a composite reinforcer.

Self-adhesive composite reinforcement

Composite reinforcement (R-) capable of adhering directly to a diene rubber matrix, which can be used as reinforcing element for a tire, comprising: one or more reinforcing thread(s) (), for example a carbon steel cord; a first layer () of a thermoplastic polymer, the glass transition temperature of which is positive, for example 6,6 polyamide, covering said thread or said threads; a second layer () of a composition comprising an unsaturated thermoplastic stirene ('TPS') elastomer, the glass transition temperature of which is negative, for example an SB (stirene/butadiene) or SBS (stirene/butadiene/stirene) block copolymer, as well as a poly(p-phenylene ether) ('PPE'), covering the first layer (). Process for manufacturing such a composite reinforcement and rubber article or semi-finished product, especially a tire, incorporating such a composite reinforcement.

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Clermont-Ferrand, France

Christophe Chouvel