Abstract: A pneumatic object is provided with an elastomer layer which is gastight to inflation gases, said elastomer layer comprising, as predominant elastomer, a thermoplastic elastomer in the form of a block copolymer which comprises: (a) an elastomeric block comprising at least units derived from isobutylene, and having a glass transition temperature of less than or equal to ?20° C., and (b) one or more thermoplastic blocks, the thermoplastic block(s) each comprising at least one first block consisting of units derived from at least one polymerizable monomer and at least one second block, said second block(s) being a random copolymer consisting of units derived from ?-methylstyrene and of units derived from ?-pinene. A process for rendering a pneumatic object gastight to inflation gases is also disclosed.

Abstract: A tire is provided with an external sidewall, said external sidewall comprising at least one elastomeric composition based on: (a) an elastomeric matrix comprising at least one diene elastomer, (b) a crosslinking system, and (c) at least one polymer incompatible with the elastomeric matrix. A process for the preparation of an elastomeric composition for an external sidewall is also disclosed.

Abstract: 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).

Abstract: 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° 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.

Abstract: A pneumatic object is provided with an elastomer layer which is gastight to inflation gases, said elastomer layer comprising, as predominant elastomer, a thermoplastic elastomer in the form of a block copolymer which comprises: (a) an elastomeric block comprising at least units derived from isobutylene, and having a glass transition temperature of less than or equal to ?20° C., and (b) one or more thermoplastic blocks, the thermoplastic block(s) each comprising at least one first block consisting of units derived from at least one polymerizable monomer and at least one second block, said second block(s) being a random copolymer consisting of units derived from ?-methylstyrene and of units derived from ?-pinene. A process for rendering a pneumatic object gastight to inflation gases is also disclosed.

Abstract: 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 one diene elastomer, at a content of between 35 and 99 phr (parts by weight per hundred parts of elastomer), and a thermoplastic elastomer at a content of between 1 and 65 phr, 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.

Abstract: A tire is provided with an external sidewall, said external sidewall comprising at least one elastomeric composition based on: (a) an elastomeric matrix comprising at least one diene elastomer, (b) a crosslinking system, and (c) at least one polymer incompatible with the elastomeric matrix. A process for the preparation of an elastomeric composition for an external sidewall is also disclosed.

Abstract: An elastomeric laminate for tires comprises at least two superimposed layers of elastomer. The first layer is composed of a composition based on at least one thermoplastic elastomer (TPE), said thermoplastic elastomer being a block copolymer comprising at least one optionally hydrogenated butadiene/styrene random copolymer-type elastomer block and at least one styrene-type thermoplastic block, at a content within a range extending from more than 50 to 100 phr (parts by weight per 100 parts by weight of elastomer). The second layer is composed of a composition based on at least one diene elastomer, the content of diene elastomer being within a range extending from more than 50 to 95 phr, and on at least one thermoplastic elastomer (TPE), said thermoplastic elastomer being a block copolymer comprising at least one optionally hydrogenated butadiene-styrene random copolymer-type elastomer block and at least one styrene-type thermoplastic block, at a content within a range extending from 5 to less than 50 phr.

Abstract: 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).

Abstract: An inflatable article is provided with an elastomer layer that is airtight to inflation gases used to inflate the article. The elastomer layer includes at least one styrene thermoplastic elastomer, which includes a polyisobutylene block. The elastomer layer also includes a polyphenylene ether (PPE).

Abstract: An airtight elastomeric laminate for tires comprises at least two superimposed layers of elastomer The first layer, includes at least a thermoplastic block elastomer comprising at least one central polyisobutylene block and adjacent blocks composed of at least one polymerized monomer, other than a styrene monomer, and on a plasticizing system. At least 5 phr of the thermoplastic elastomer present in the second layer are compatible with at least 5 phr of the thermoplastic block elastomer present in the first layer.

Abstract: An airtight elastomeric laminate for tires comprises at least two superimposed layers of elastomer. The first layer is composed of a composition based on at least one thermoplastic elastomer having polystyrene and polyisobutylene blocks, the content of thermoplastic elastomer having polystyrene and polyisobutylene blocks being within a range extending from more than 50 to 100 phr and on a plasticizing system comprising from 1 to 40 phr of a plasticizing oil and from 1 to 40 phr of a hydrocarbon resin, the total content of plasticizer being within a range extending from 2 to 70 phr. The second layer is composed of a composition based on at least one diene elastomer, the content of diene elastomer being within a range extending from more than 50 to 95 phr, and on at least one thermoplastic styrene elastomer in an amount ranging from 5 to less than 50 phr.

Abstract: A pneumatic tire comprises an outer rubber tread, a carcass reinforcement, a gastight layer positioned internally relative to the carcass reinforcement and an adhesion layer adjacent to the gastight layer and positioned between the carcass reinforcement and the gastight layer. The adhesion layer consists of a deformable fibre assembly.

Abstract: An elastomeric laminate for tires comprises at least two superimposed layers of elastomer. The first layer is composed of a composition based on at least one thermoplastic elastomer, the content of thermoplastic elastomer being within a range extending from more than 50 to 100 phr. The second layer is composed of a composition based on at least one diene elastomer, the content of diene elastomer being within a range extending from more than 50 to 95 phr, and on at least one thermoplastic elastomer, the content of thermoplastic elastomer being within a range extending from 5 to less than 50 phr. At least 5 phr of the thermoplastic elastomers present in the second layer are compatible with at least 5 phr of the elastomers present in the first layer.

Abstract: Inflatable article equipped with an elastomer layer impermeable to inflation gases, said elastomer layer comprising at least, as the predominant elastomer, a thermoplastic SIBS elastomer comprising a polyisobutylene block comprising an amount of units derived from one or more conjugated dienes ranging from 0.5% to 6% by weight relative to the weight of the polyisobutylene block, and, at least one of the ends of the polyisobutylene block, a styrenic block representing at most 16% by weight of the total weight of the block copolymer. Preferably the airtight elastomer layer also comprises, as a plasticizing agent, an extender oil for the SIBS elastomer. The inflatable article of the invention is, in particular, an inner tube or a pneumatic tire for a motor vehicle.

Abstract: An airtight elastomeric laminate for tires comprises at least two superimposed layers of elastomer. A first layer is composed of a composition based on at least one thermoplastic elastomer having polystyrene and polyisobutylene blocks, the content of thermoplastic elastomer having polystyrene and polyisobutylene blocks being within a range extending from more than 50 to 100 phr. A second layer is composed of a composition based on at least one diene elastomer, the content of diene elastomer being within a range extending from more than 50 to 95 phr, and on at least one thermoplastic styrene elastomer, the content of thermoplastic styrene elastomer being within a range extending from 5 to less than 50 phr.

Abstract: A tire includes an internal layer, having improved airtightness. The layer includes at least one rubber composition, which includes: at least one or more diene elastomers at a total content of 1 to 99 phr, one or more thermoplastic elastomers having a polyisobutylene block at a total content of 1 to 99 phr, optionally a reinforcing filler at a content of 0 to 120 phr, and a crosslinking system.

Abstract: A tire includes a tread, having improved airtightness. The tread includes at least one rubber composition comprising at least one or more diene elastomers at a total content of 1 to 99 phr, one or more thermoplastic elastomers having a polyisobutylene block at a total content of 1 to 99 phr, optionally a reinforcing filler at a content of 0 to 200 phr, and a crosslinking system.

Abstract: A tire includes an external sidewall, having improved airtightness. The external sidewall includes at least one rubber composition comprising at least one or more diene elastomers at a total content of 1 to 99 phr, one or more thermoplastic elastomers having a polyisobutylene block at a total content of 1 to 99 phr, optionally a reinforcing filler at a content of 0 to 120 phr, and a crosslinking system.

Abstract: A pneumatic tire with a built-in self-sealing layer is described. The tire includes an outer rubbery tread, a carcass reinforcement, a gastight layer located at an inside position relative to the carcass reinforcement, a protective layer positioned innermost, and a self-sealing layer adjacent to the protective layer and located at an inside position relative to the gastight layer. The protective layer is a chlorinated thermoplastic polymer film.