Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Michelin Recherche Et Techniques S.a.

Compagnie Generale Des Establissements Michelin

Vincent Abad

Emmanuel Custodero

Julien Thuilliez

Vincent Lemal

Sébastien Rigo

Frédéric Perrin

Pierre Lesage

Christophe Chouvel

Marc Duvernier

Marc Greiveldinger

Damien Thomasson

Salvatore Pagano

Rachid Matmour

Jean-Denis Hidrot

Masayuki Maesaka

Jean-Marie Mus

Romain Libert

Baptiste Foglieni

Guillaume Hennebert

Patrick Bernadot

Abdeslam El-Harak

Flora Descombes

Luc Chebance

Richard Vivier

A resin-extended elastomer comprises an elastomer which is a synthetic diene elastomer with a number-average molar mass of greater than or equal to 200,000 g/mol and a resin which is a plasticizing hydrocarbon-based resin. A process for obtaining such a resin-extended elastomer and compositions, semi-finished products for tires and tires containing same are also disclosed.

Resin-extended elastomer

A rubber composition based on one or more diene elastomer(s), on at least one reinforcing filler, on at least one coupling agent, on at least one chemical crosslinking system, wherein the reinforcing filler comprises silica in the form of essentially spherical nanoparticles, the specific surface area of this silica ranging from 30 m/g to 250 m/g. Also disclosed is a process for producing such a composition and also semi-finished or finished articles comprising at least one such composition.

Rubber composition comprising an essentially spherical, relatively unstructured silica

A rubber composition is based on at least 80 phr (parts by weight per hundred parts by weight of elastomer) of a styrene/butadiene elastomer (SBR) referred to as low-Tg SBR, the glass transition temperature (Tg) of which is less than &#x2212;60&#xb0; C.; at least 130 phr of reinforcing filler; at least 110 phr in total of a plasticizing system comprising a hydrocarbon-based resin at a content within a range extending from 70 to 100 phr and a plasticizing oil at a content within a range extending from 10 to 40 phr; and a vulcanization system.

Rubber composition comprising a styrene-butadiene copolymer having a low glass transition temperature, and a high content of filler and of plasticizer

A rubber composition is based on at least one predominant vinylaromatic diene elastomer, a reinforcing filler, a crosslinking system and a thermoplastic resin comprising optionally substituted polyphenylene ether units, said resin having a number-average molecular weight (Mn) of less than 6000 g/mol. The rubber composition can be used in semi-finished tire articles and tires.

Rubber composition comprising a polyphenylene ether resin as plasticizer

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

Method of manufacturing a tire tread having a plurality of raised elements, each having a contact face intended to come into contact with a ground when the tire is rolling and lateral faces connected to this contact face. The method of manufacture comprises:

Method of manufacturing a tire tread

A pneumatic object or inflatable article is provided with a gastight elastomer layer. The gastight elastomer layer includes a thermoplastic polyisobutylene block elastomer and hot-melt polymer microdomains based on at least one thermoplastic material.

Pneumatic object provided with a gastight layer containing a thermoplastic elastomer and a thermoplastic

A tread for a pneumatic tire includes tread pattern elements and cuts. Each tread pattern element includes lateral faces and a contact face that comes into contact with a road surface when the tire is being driven thereon. A boundary between the contact face and the lateral faces forms at least one edge corner. The cuts are formed as grooves and/or sipes, with the cuts being delimited by opposing lateral faces of the tread pattern elements. Each tread pattern element is formed of at least one rubber compound. When the tread is viewed in cross section in a plane normal to an axis of rotation of the tire and passing through a contact face of a tread pattern element, at least one of the cuts adjacent to that contact face is covered at least in part with a covering layer that contains a woven or nonwoven fiber assembly.

Tread comprising tread pattern elements covered with an impregnated fibre assembly

A pneumatic object is provided with a layer that is airtight to inflation gases. The layer includes an elastomer composition having at least a thermoplastic elastomer (TPE), as a sole elastomer or as a predominant elastomer by weight, and a hydrocarbon resin. A glass transition temperature of the hydrocarbon resin is above 0&#xb0; C. The TPE is a copolymer that includes at least a central polyisobutylene block. Optionally, the elastomer composition includes an extender oil. Also optionally, the elastomer composition includes a platy filler selected from a group that includes graphites and phyllosilicates, such as micas, clays, and talcs. The pneumatic object may be an inner tube or a pneumatic tyre for a motor vehicle.

Inflatable object provided with a gas-tight layer containing a thermoplastic elastomer and a hydrocarbon-based resin

A tire includes a tread, a crown with a crown reinforcement, first and second sidewalls, two beads, and a carcass reinforcement anchored to the two beads and extending from the first sidewall to the second sidewall. The tread includes a thermoplastic elastomer that is a block copolymer, which includes at least one elastomer block and at least one thermoplastic block. A total content of the thermoplastic elastomer in the tread is within a range varying from 65 to 100 phr (parts by weight per hundred parts of elastomer).

A composite reinforcer that can adhere directly to a diene rubber matrix is usable as a reinforcing element for a pneumatic tire. The composite reinforcer includes at least one reinforcing thread, such as a carbon steel cord. Covering each thread individually or several threads collectively is a layer of a thermoplastic polymer composition. The thermoplastic polymer composition includes at least one thermoplastic polymer have a glass transition temperature that is positive, a poly(p-phenylene ether) (PPE), and a functionalized unsaturated thermoplastic styrene (TPS) elastomer having a glass transition temperature that is negative. The TPS elastomer includes a functional group selected from: an epoxide group, a carboxyl group, an acid anhydride group, and an ester group. A process for manufacturing such a composite reinforcer is presented, as well as a process for producing a rubber article, especially a pneumatic tire, incorporating such a composite reinforcer.

Composite reinforcer sheathed with a layer of polymer that is self-adhesive to rubber

A rubber composition is based on at least one predominant vinylaromatic diene elastomer, a reinforcing filler, a crosslinking system and a thermoplastic resin comprising optionally substituted polyphenylene ether units, said resin having a compatibility with said vinylaromatic diene elastomer such that a mixture of said vinylaromatic diene elastomer and said resin creates a composition having less than 10% of its volume in the form of particles greater than 2 micrometres in size. The rubber composition may be used in semi-finished tire articles and tires.

A rubber composition, which can be used for manufacturing tires, is based on one or more diene elastomers, on one or more reinforcing fillers, and on a crosslinking system. The rubber composition includes particles of one or more thermoplastic materials chosen from thermoplastic materials with melting or softening points varying from 80&#xb0; C. to 300&#xb0; C. The rubber composition also includes one or more compatibilizing agents chosen from block copolymers that includes at least one diene elastomer block and at least one thermoplastic block compatible with the one or more thermoplastic materials.

Rubber composition comprising a thermoplastic filler and compatibilizer

Composite reinforcer (R-) that is self-adhesive, by curing, to a diene rubber matrix, which can be used as reinforcing element for a pneumatic 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 a polyamide, covering said thread, individually each thread or collectively several threads; a second layer () of a composition comprising a poly(p-phenylene ether) ('PPE') and a functionalized diene elastomer bearing functional groups selected from epoxide, carboxyl, acid anhydride and acid ester groups, in particular an epoxidized SBR, covering the first layer (). Process for manufacturing such a composite reinforcer and rubber article or semi-finished product, especially a pneumatic tire, incorporating such a composite reinforcer.

Composite reinforcer

A tire includes a tread with an internal cavity. Positioned in the internal cavity is a composite cord structured to include an elastomer core and a sheath surrounding the elastomer core. The sheath is formed of a hollow cylindrical braid made of helically intertwined non-contiguous fibers. The tire may be pneumatic or non-pneumatic.

Growing community of inventors

Clermont-Ferrand, France

Vincent Abad