Abstract: A pneumatic tyre includes an internal sealing layer, which partially delimits an internal volume (V) of the pneumatic tyre, and a self-sealing layer formed of at least a self-sealing product. The self-sealing layer is positioned radially on an inside region with respect to the internal sealing layer, and has a creep resistance indicator that increases axially from a median plane outwards, i.e., towards outside of the pneumatic tyre.

Abstract: A pneumatic tyre includes an internal sealing layer, which partially delimits an internal volume of the pneumatic tyre, and a self-sealing layer formed of a self-sealing product. The self-sealing layer is positioned radially on an inside region with respect to the internal sealing layer, and has a creep resistance indicator that decreases radially outwards, i.e., towards outside of the pneumatic tyre.

Abstract: Elastomer composition having a self-sealing property which can be used in particular as puncture-resistant layer in an inflatable article, based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a blend of at least two solid elastomers, a polybutadiene or butadiene copolymer elastomer, referred to as “elastomer A”, and a natural rubber or synthetic polyisoprene elastomer, referred to as “elastomer B”, the elastomer A:elastomer B ratio by weight being within a range from 10:90 to 90:10; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler. Inflatable article, such as a tire, provided with a puncture-resistant layer comprising a composition according to the invention; the puncture-resistant layer is advantageously used in combination with an airtight layer, for example based on butyl rubber or TPS elastomer, in order to form, in the inflatable article, an airtight and puncture-resistant laminate.

Abstract: Process for the manufacture of an elastomer composition having a self-sealing property which is based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a blend of at least two solid elastomers, a polybutadiene or butadiene copolymer elastomer, referred to as “elastomer A”, and a natural rubber or synthetic polyisoprene elastomer, referred to as “elastomer B”, the elastomer A:elastomer B ratio by weight being within a range from 10:90 to 90:10; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler, in which, during a first stage or stage (a), a masterbatch comprising at least the elastomers A and B and between 30 and 90 phr of a hydrocarbon resin is prepared by mixing these various components in a mixer at a “hot compounding” temperature or up to a “hot compounding” temperature which is greater than the softening temperature of the hydrocarbon resin.

Abstract: Elastomer composition having a self-sealing property which can be used in particular as puncture-resistant layer in an inflatable article, based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a solid unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler; between 0.5 and 15 phr of thiuram polysulphide. Inflatable article, such as a tire, provided with a puncture-resistant layer comprising a composition according to the invention; the puncture-resistant layer is advantageously used in combination with an airtight layer, for example based on butyl rubber or TPS elastomer, in order to form, in the inflatable article, an airtight and puncture-resistant laminate.

Abstract: Process for the manufacture of an elastomer composition having a self-sealing property which is based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a solid unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler; between 0.5 and 15 phr of thiuram polysulphide, in which, during a first stage or stage (a), a masterbatch comprising at least the solid unsaturated diene elastomer and between 30 and 90 phr of a hydrocarbon resin is prepared by mixing these various components in a mixer at a “hot compounding” temperature or up to a “hot compounding” temperature which is greater than the softening temperature of the hydrocarbon resin.

Abstract: Tyre with inbuilt self-sealing layer comprising an external rubber tread, a carcass reinforcer, a gastight layer arranged on the inside relative to the carcass reinforcer, an anti-tack layer arranged furthest towards the inside and a self-sealing layer adjacent to the anti-tack layer and arranged on the inside relative to the gastight layer, characterized in that the said anti-tack layer is comprised of particles with a shape factor (F=L/E) higher than 5, L representing the length or longest dimension and E the shortest dimension normal to the length.

Abstract: A process for manufacturing a self-sealing elastomer composition, said process comprising the following steps: a masterbatch, comprising at least one diene elastomer and more than 30 phr of a hydrocarbon resin, is firstly manufactured by compounding these various components in a mixer at a temperature or up to a temperature called the “hot compounding” temperature which is above the softening point of the hydrocarbon resin; and then at least one crosslinking system is incorporated into the masterbatch thus prepared, by compounding everything in the same mixer or in a different mixer, at a temperature or up to a temperature which is kept below 100° C., in order to obtain said self-sealing composition.

Abstract: Process for manufacturing a self-sealing elastomer composition, wherein the process comprises the following steps: firstly a masterbatch comprising at least one diene elastomer and a thermoplastic plasticizing hydrocarbon resin with a content greater than 30 phr is manufactured by compounding these various components in a mixer at a temperature or up to a temperature called the “hot compounding temperature” which is above the softening point of the hydrocarbon resin; and then at least one crosslinking system is incorporated into the masterbatch thus prepared, by compounding everything, in the same mixer or in a different mixer, at a temperature or up to a maximum temperature which is kept below 100° C., in order to obtain said self-sealing composition, and wherein at least one liquid plasticizer having a glass transition temperature (Tg) below ?20° C. is furthermore incorporated in an amount of less than 60 phr into said masterbatch or into said composition.

Abstract: A self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer; a thermoplastic hydrocarbon plasticizer resin with a weight content of between 30 and 90 phr; a liquid plasticizer, the Tg (glass transition temperature) of which is below ?20° C., with a weight content between 0 and 60 phr; and 0 to less than 30 phr of a filler. Also disclosed is an article such as a tire provided with the puncture-resistant layer comprising the self-sealing elastomer composition. The puncture-resistant layer is advantageously combined with an airtight layer, for example based on butyl rubber, so as to form, in the inflatable article, a puncture-resistant airtight laminate.

Abstract: Inflatable article such as a pneumatic tire provided with a puncture-resistant layer comprising, by way of a self-sealing composition, an elastomer composition comprising at least, as predominant elastomer, a thermoplastic stirene (TPS) elastomer, more than 200 phr of an extender oil and more than 20 phr of a hydrocarbon resin, the glass transition temperature of which is greater than 0° C. The puncture-resistant layer is advantageously combined with an airtight layer, for example based on butyl rubber, so as to form, in the pneumatic article, an airtight puncture-resistant laminate.

Abstract: Self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; and 0 to less than 30 phr of a filler. Also disclosed is an article such as a tire provided with a puncture-resistant layer comprising the self-sealing elastomer composition. The puncture-resistant layer is advantageously combined with an airtight layer, for example based on butyl rubber, so as to form, in the inflatable article, a puncture-resistant airtight laminate.