Abstract: A composition includes a vulcanizable diene rubber, a silica filler, and a metal-functionalized polyisobutylene succinic anhydride derivative. In one embodiment the composition has a reduced amount of oil and may include no oil. A tire tread composition includes, a silica filler, a metal-functionalized polyisobutylene succinic anhydride derivative, a rubber matrix, an optional oil, and one or more components selected from the group consisting of carbon black, vulcanizing agent, vulcanization accelerator, tackifier resin, antioxidant, wax, peptizer, vulcanization retarder, activator, processing additive, plasticizer, pigments, and antiozonant. A method for making the rubber composition and the tire tread is also provided.

Abstract: Provided herein are cured rubber compositions containing guayule natural rubber with 2.5-4 weight % resin and fillers. By the use of a specified cure package that contains increased amounts of sulfur and accelerator, the cured rubber compositions are found to exhibit strain induced crystallization (as can be observed by X-ray diffraction). Also provided are related methods for preparing the rubber compositions.

Abstract: A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with excellent shear strength, anti-crack properties, and abrasion resistance, even with the reduced content of copper. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 0.5 mass % or less as a copper element; a metal other than copper and copper alloy in a content of 0.5 mass % or less; an acrylic elastomer-dispersed phenol resin as the binder in a content of 7-15 mass %; and Ca(OH)2 and/or CaO as the inorganic filler in a content of 1-5 mass %.

Abstract: A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with low environmental load and with excellent friction coefficient, anti-crack properties, and abrasion resistance compared with conventional ones. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; and mica and graphite with a particle size of 90 ?m or less but not containing graphite with a particle size of more than 90 ?m.

Abstract: A rubber composition based on a diene elastomer, a crosslinking system, and a reinforcing filler is provided, as well as a process for obtaining the composition. The composition includes a starch in a proportion of from 10 to 50 phr (parts by weight per hundred parts of elastomer) and an aqueous or water-soluble plasticizer in a proportion of from 3 to 30 phr. The aqueous or water-soluble plasticizer is water or a mixture of water and glycerol, in which the water is predominant by weight in the aqueous or water-soluble plasticizer. The composition can be used for preparing calendered or profiled tyre-related products, such as a tyre tread, for example.

Abstract: A non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 0.5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; cashew dust in a content of 3.5-10.0, wollastonite, and mica. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber possibly causing environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.

Abstract: The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; iron powder and tin powder as the inorganic filler in a total content of 1-12 mass %. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber that possibly cause environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.

Abstract: This friction material, including the silicone rubber particles as the friction modifier, inhibits fall off and dislocation of the silicone rubber particles from the friction surface to provide effective abrasive resistance. For the friction material including the fiber base material, the binder, the abrasive material, and the friction modifier, the silane coupling agent dispersed silicone rubber particles, in which the silane coupling agent is dispersed, can be used as the friction modifier. The silane coupling agent dispersed silicone rubber particles includes between 0.1 and 5 weight % of the silane coupling agent and are between 0.5 and 20 volume % relative to the entire friction material and between 10 ?m and 1,000 ?m of the average particle diameter. The friction material includes between 0.1 and 20 volume % of the rigid inorganic particles relative to the entire friction material. The rigid inorganic particles are 5-9 Mohs' hardness and 1-5 ?m average particle diameter.

Abstract: A tire whose tread comprises a rubber composition comprising at least one diene elastomer, for instance an SBR, a reinforcing filler, for instance a silica, and a polyether block amide (PEBA) thermoplastic elastomer. Such a composition has a reduced raw-state viscosity, thus promoting the processability of the treads, while at the same time conserving a good level of dry road holding and of rolling resistance.

Abstract: A tire, the tread of which comprises a rubber composition comprising a diene elastomer, such as, for example, an SBR or BR elastomer, a poly(vinyl ester) resin, at a content preferably of between 5 and 50 phr, and a reinforcing filler, such as silica and/or carbon black. The poly(vinyl ester) resin is in particular a vinyl ester homopolymer or copolymer of foimula R—C(?O)O—CH?CH2, at least one of the vinyl ester monomers of which comprises a radical R having more than 2 carbon atoms, preferably from 4 to 20 carbon atoms. Such a composition makes it possible to improve the wet grip of the treads of the tire and also the processability of such a composition.

Abstract: A composition includes a diene rubber and a metal phosphate ester of the formula: M being a metal with an oxidation state of +3 or +4, and R1 and R2 are independently selected from any organic moiety including hydrogen, except R1 and R2 cannot both be hydrogen. In addition, a method of making a rubber composition includes combining a solvent and a phosphate ester and mixing these to foam a solution. A source of metal ions is then added to the solution. The metal in the source of metal ions is selected from the group consisting of metals with an oxidation state of +3 or +4. The product is then is combined with a diene rubber composition to form a useful article, such as the tread of a tire.

Abstract: The present invention aims to provide a masterbatch which enables microfibrillated plant fibers to be well dispersed in a rubber composition so that they can provide reinforcement equal to or greater than that by conventional fillers; a rubber composition containing the masterbatch; and a pneumatic tire produced using the rubber composition. The present invention relates to a masterbatch containing a modified natural rubber with a phosphorus content of 200 ppm or less, and microfibrillated plant fibers. Preferably, the microfibrillated plant fibers in a primary form have an average fiber diameter of 4 nm to 10 ?m and an average fiber length of 100 nm to 200 ?m.

Abstract: A rubber composition for tires contains a diene rubber, silica, a sulfur-containing silane coupling agent and a triethoxysilane containing an alkyl group having a prescribed number of carbon atoms, wherein 50 mass % or more of the aforementioned diene rubber is a styrene-butadiene copolymer rubber, the aforementioned sulfur-containing silane coupling agent has a mercapto group, the content of the aforementioned silica is from 5 to 150 parts by mass per 100 parts by mass of the aforementioned diene rubber, the content of the aforementioned sulfur-containing silane coupling agent is from 3 to 15 mass % relative to the content of the aforementioned silica, and the content of the aforementioned alkyltriethoxysilane is from 0.1 to 20 mass % relative to the content of the aforementioned silica.

Abstract: A tire component is provided comprising an elastomeric composition containing at least one non-fibril cellulose ester, at least one primary elastomer, and one or more fillers, wherein said composition exhibits a dynamic mechanical analysis (DMA) strain sweep modulus as measured at 5% strain and 30° C. of at least 1,450,000 Pa and a molded groove tear as measured according to ASTM D624 of at least 120 lbf/in.

Abstract: In a wet friction material, inorganic filler of small particle size is added to fill clearances or space between fibers with the inorganic filler. The inorganic filler is attached to the fibers with each other to reinforce strength of the wet friction material when an impregnated resin is hardened. Absolute specific gravity of the inorganic filler is set at a fixed value so as to make its compounding quantity small, thereby assuring a pore diameter of a friction material substrate without filling pores of the friction material substrate with the inorganic filler.

Abstract: A substantially copper-free friction material for a brake pad includes a binder forming approximately 8-18% by volume, a fiber forming 5-14% by volume, at least one lubricant forming up to 6% by volume, at least one abrasive forming 10-27% by volume, at least one carbon content component forming 36-51% by volume, and at least one filler forming 6-21% by volume. The friction material can be applied to the backing plate of a brake pad.

Abstract: A friction lining for a wet clutch, in particular for a converter lockup, the clutch containing the ingredients—cellulose fibers, aramid fibers, fillers and a bonding agent. To provide a cost-effective friction lining suitable for the application under the conditions of a converter lockup clutch, it is proposed to admix powdered nutshell of percentage weight between 1% and 40%.

Abstract: The present invention provides a rubber composition for a tire which can achieve both high levels of fuel economy and abrasion resistance, as well as excellent wet grip performance; and a pneumatic tire produced using the rubber composition. The rubber composition for a tire includes a rubber component that includes 5% by mass or more of a modified styrene butadiene rubber containing a constitutional unit derived from a specific nitrogen-containing compound in a main chain, based on 100% by mass of the rubber component; silica; and a compound represented by the following formula (I): R20—S—S-A-S—S—R21 ??(I) wherein A represents a C2 to C10 alkylene group, and R20 and R21 are the same as or different from each other, each representing a monovalent organic group that contains a nitrogen atom.

Abstract: A tire, the tread of which comprises a rubber composition comprising at least one diene elastomer, such as SBR and/or BR, a reinforcing filler, such as silica and/or carbon black, and more than 10 phr, preferably more than 15 phr, of a hydrogenated stirene thermoplastic elastomer. This composition, which exhibits a reduced viscosity in the raw state, makes it possible to obtain treads of tires exhibiting a reduced rolling resistance, while retaining a good level of wet grip.

Abstract: A rubber composition for a tire tread includes a modified diene rubber comprising a styrene butadiene rubber and/or a polybutadiene rubber, having a functional group such as an amino group or a hydroxyl group, silica, a silane coupling agent, a lignin derivative, and a carbon masterbatch. The carbon masterbatch comprises a styrene butadiene rubber, and carbon black having iodine adsorption of from 60 to 130 g/kg, and a ratio of the amount (B) of a rubber in the carbon masterbatch to the amount (A) of the modified diene rubber is B/A=0.25 to 1. The total amount of the carbon black and the silica is from 40 to 100 parts by mass per 100 parts by mass of a rubber component, the proportion of the silica in fillers is from 25 to 80% by mass, and the amount of the lignin derivative is from 0.1 to 10 parts by mass.

Abstract: A tread mix comprising a cross-linkable unsaturated-chain polymer base; curing agents; silica; and a silane bonding agent; said mix being characterized in that said polymer base comprises a first SBR rubber comprising 20-40% of a first fraction with a mean molecular weight of 50-100×103 and a molecular weight distribution of <1.5, and 80-60% of a second fraction with a mean molecular weight of 800-1500×103 and a molecular weight distribution of <3.0; and in that said silane bonding agent is a mercaptosilane of formula I: SH(CH2)1SiR1R22??(I) where: 1 is an integer of 1 to 6, R2 is —O(CH2)gCH3, R2 is —O(CH2CH2O)m(CH2)nCH3, g is an integer of 0 to 5, m is an integer of 2 to 8, and n is an integer of 3 to 20.

Abstract: A brake pad obtainable by peroxide cross-linking with a mixture comprising: a polymeric base having from 10 to 40 parts by weight of hydrogenated acrylonitrile-butadiene rubber (HNBR); from 90 to 60 parts by weight of a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer; and, fibres from 5 to 15 parts by weight per 100 parts by weight of polymeric base.

Abstract: Reinforced rubber composition based on at least (a) an elastomeric matrix predominantly based on natural rubber, (b) a reinforcing filler predominantly based on an inorganic filler, (c) a coupling agent and (d) a dihydrazide compound corresponding to the following formula I: in which R is a divalent hydrocarbon radical chosen from aromatic radicals having from 6 to 20 carbon atoms or saturated or unsaturated aliphatic radicals having from 2 to 20 carbon atoms and n has the value 0 or 1. This rubber composition is intended, for example, for the manufacture of a semi-finished rubber product intended for the tires of motor vehicles.

Abstract: The invention relates to a method for preparing a silica/diene elastomer masterbatch, comprising the following successive steps: doping the silica with an at least divalent metallic element; preparing at least one dispersion of the resulting doped silica in water; bringing a diene elastomer latex into contact with the aqueous doped-silica dispersion and mixing them together so as to obtain a coagulum; recovering the coagulum; and drying the recovered coagulum so as to obtain the masterbatch.

Abstract: A friction element for a synchronizing device as well as an apparatus for producing a friction element for a synchronizing device are disclosed.

Abstract: This invention relates to a rubber composition capable of improving wear resistance without losing low heat buildup and a heavy duty pneumatic tire in which the low heat buildup and the wear resistance are simultaneously established, and more particularly to a rubber composition characterized by comprising 40 to 60 parts by mass of a carbon black based on 100 parts by mass of a rubber component composed of natural rubber and a diene-based synthetic rubber and satisfying a relation of the following formula (1): ?E?<0.29×A?11??(1) [wherein ?E? is a difference between a storage modulus (MPa) at a strain of 0.1% and a storage modulus (MPa) at a strain of 2% measured at 25° C., and A is an amount (parts by mass) of the carbon black compounded based on 100 parts by mass of the rubber component] and a heavy duty pneumatic tire characterized by using the rubber composition in a tread.

Abstract: A rubber composition for use in tire treads including a rubber component and, per 100 parts by mass thereof, from 1 to 20 parts by mass of the gel described below; and a pneumatic tire using the rubber composition in a tread. Gel: A gel produced by dissolving a polyvinylalcohol powder in an aqueous solution containing water or water and an organic solvent including a group selected from a hydroxy group, an amino group, and an amide group; and crosslinking by adding a crosslinking agent thereto.

Abstract: Provided are a rubber composition that makes it possible to improve heat resistance and particularly suppress changes in the properties (e.g. hardness) of the vulcanized rubber composition with long-term use (rubber hardening degradation) to suppress a reduction in performance on snow and ice to extend the life-span, without increase in the antioxidant amount, achieve good performance on snow and ice, wet-grip performance, and abrasion resistance, and reduce curing time and enhance cross-linking efficiency; and a winter tire including a cap tread produced from the composition. The rubber composition for a cap tread comprises a rubber component containing an isoprene-based rubber and butadiene rubber; silica; aromatic oil; a compound represented by formula (I) and/or formula (II); and a thiuram vulcanization accelerator, wherein the amount of silica is 15-80 parts by mass, and the amount of aromatic oil is 15-80 parts by mass, per 100 parts by mass of the rubber component.

Abstract: Tire treads, especially tire treads for aircraft or for heavy vehicles, formed from a material that is based upon a cross-linkable rubber composition, the cross-linkable rubber composition comprising, per 100 parts by weight of rubber, between 40 phr and J 00 phr of a polyisoprene rubber, between 0 and 60 phr of a highly unsaturated diene rubber and between 1 phr and 25 phr of a polylerpene resin having a glass transition temperature of between 50° C. and 120° C. The rubber composition further includes between 0.1 phr and 10 phr of a poly-thiosulfate anti-reversion agent having the formula: MO3S—S—X—S—SO3M wherein X is an alkylene radical or a radical comprising two or more alkylene units, pairs of which units being linked through an oxygen or a sulfur atom, through a group SO2—, —NH—, —NH2+—, —NlC1-16alkyl)- or —COO—, or through an arylene or cycloalkylene radical and M is a metal.

Abstract: A friction lining made of a fibrous mixture with fillers and resin for a wet clutch. In order to design the friction lining able to withstand the higher torque to be transmitted, it is proposed to admix further filler with a Mohs hardness greater or equal to 9.0 and smaller or equal to 9.5 in addition to the ingredients of aramid fibers, cellulose fibers, phenol resin and amorphous silicon dioxide and first filler.

Abstract: The invention is directed to a pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, (A) 10 to 40 phr of a polybutadiene rubber having a microstructure comprised of about 96 to about 98 percent cis 1,4-isomeric units, about 1 to about 3 percent trans 1,4-isomeric units and about 0.3 to about 1 percent vinyl 1,2-content; Mn ranging from about 230,000 to about 250,000 with a heterogeneity index ranging from about 1.5/1 to about 2/1, and a Tg ranging from about ?104 to about ?109° C.; (B) 60 to 90 phr of a solution polymerized styrene-butadiene rubber functionalized with an alkoxysilane group and a primary amine group; (C) 60 to 100 phr of silica having a CTAB of between 40 and 525 m2/g, a BET of between 45 and 550 m2/g; and (D) less than 5 phr of carbon black.

Abstract: The invention relates to a rubber mixture, in particular for vehicle air-inflated tires, seat belts, belts and hoses. The rubber mixture is characterized by the following composition: at least one polar or non-polar rubber and at least one bright and/or dark filler and at least one softener, wherein the softener is free of polycyclic aromatics according to Directive 76/769/EEC, and wherein the carbon source for the softener comes from non-fossil sources, and other additives.

Abstract: The purpose of the present invention is to provide a wet friction material which has a high coefficient of friction, has reduced overall thickness change, and excellent heat resistance (resistance to heat spots). In order to accomplish the purpose, the present invention provides a wet friction material prepared by impregnating a base material including a fibrous substance with a thermosetting resin, and then thermally curing it, wherein the aspect ratio of the fibrous substance is 10 or higher, and the fibrous substance is contained in the base material in an amount of 60 to 75 weight %.

Abstract: The invention relates to a silica reinforced rubber composition comprised of low Tg polybutadiene, particularly high cis 1,4-polybutadiene or high trans 1,4-polybutadiene with or without functional groups, and high Tg styrene/butadiene elastomers, particularly functionalized styrene/butadiene, elastomers, together with high Tg liquid unsaturated conjugated diene-based polymer, particularly styrene/butadiene polymer, which can also be functionalized, and high glass transition or softening point temperature (Tm or Tg) resins, particularly high Tg styrene/alpha methylstyrene resin. The invention relates to a tire having a tread comprised of such rubber composition.

Abstract: One exemplary embodiment includes a friction material including a base including a plurality of fibers. The base including an engagement surface, and a plurality of binder particles and friction modifying particles at the engagement surface.

Abstract: A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent; introducing a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas; and isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.

Abstract: A condensation product of resorcin and acetone, wherein the ratio of the area of the first elution peak to the total area of all peaks is 20 to 50% as determined by gel permeation chromatography of which detector is a differential refractive index detector.

Abstract: The present invention aims to provide a rubber composition for a base tread capable of enhancing fuel economy, elongation at break and durability in a balanced manner while maintaining favorable handling stability and processability (extrusion processability) even if the amount of zinc oxide is reduced, and a pneumatic tire having a base tread produced from the rubber composition. The present invention relates to a rubber composition for a base tread including: a rubber component; a compound represented by Formula (I): wherein R1 to R4 each independently represent a C1 to C18 linear or branched alkyl group or a C5 to C12 cycloalkyl group; and zinc oxide, wherein the amount of the compound represented by Formula (I) is 0.2 to 6 parts by mass and the amount of the zinc oxide is 1.0 part by mass or less, relative to 100 parts by mass of the rubber component.

Abstract: The present invention provides a rubber composition for a studless tire capable of improving the performance on snow and ice, wet performance, abrasion resistance in good balance, and a studless tire having a tread produced from the rubber composition. The rubber composition for a studless tire includes a rubber component including modified natural rubber and butadiene rubber; aromatic oil; silica; and carbon black, wherein the amount of the aromatic oil is 15 to 80 parts by mass and the amount of the silica is 15 to 80 parts by mass, relative to 100 parts by mass of the rubber component.

Abstract: The present invention relates to a rubber composition based on at least an epoxidized natural rubber—, a reinforcing filler and, as plasticizing agent, an alpha-methylstyrene polymer resin. The invention also relates to the use of such a composition for the manufacture of a tyre tread exhibiting an improved compromise of properties with respect to grip on wet ground and rolling resistance.

Abstract: The present invention relates to a process for producing a resin-extended isoprene rubber comprising (A) a rubber component containing a natural rubber and/or a synthetic isoprene rubber and (B) a thermoplastic resin, wherein a resin slurry liquid prepared by dispersing the component (B) described above in water is mixed with a latex of the rubber component (A) described above, and then the mixture is coagulated and subjected to drying treatment, a rubber composition containing the resin-extended isoprene rubber obtained by the above process and a pneumatic tire prepared by using the above rubber composition for a member for a tread, and provided are a process for producing a resin-extended isoprene rubber in which a natural rubber and/or a synthetic isoprene rubber and a resin are used and in which the above resin is highly dispersed, a rubber composition which contains the resin-extended isoprene rubber obtained by the above process and which can secure a fracture characteristic and the like and a pneumatic

Abstract: Pneumatic rubber tire with a component comprised of a silica reinforced rubber composition comprised of specialized polybutadiene rubber, functionalized styrene/butadiene elastomer and cis 1,4-polyisoprene rubber.

Abstract: An object of the present invention is to provide a rubber composition for a tread which can improve fuel economy, grip performance (in particular, wet grip performance), abrasion resistance and handling stability in a balanced manner, and a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a tread, including a molten mixture of a solid resin having a softening point of not lower than 40° C. and at least one softener selected from the group consisting of oils, liquid coumarone-indene resins, and liquid indene resins, and the molten mixture having a mass ratio of the solid resin to the softener of 90/10 to 50/50.

Abstract: The invention relates to a rubber composition that is free of zinc or that contains less than 0.5 phr of zinc, which can be used for the manufacture of tyres, based on at least: one diene elastomer; one sulphur-based crosslinking system; one inorganic filler as reinforcing filler; one blocked mercaptosilane of general formula I below: (R3O)R2R1—Si—Z—S—C(?O)-A in which: R1 and R2, which are identical or different, represent a monovalent hydrocarbon-based group chosen from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms; R3 represents a monovalent hydrocarbon-based group chosen from linear or branched alkyls having from 1 to 4 carbon atoms; A represents hydrogen or a monovalent hydrocarbon-based group chosen from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms; Z represents a divalent bonding group comprising from 1 to 18 carbon atoms.

Abstract: A metal fiber, copper, and titanate free non-asbestos friction material for brake pads is provided. The friction material includes a binder, such as a phenolic resin, forming 16-24% by volume; a fiber, such as aramid fiber, forming 4-12% by volume; a lubricant, such as a blend of antimony tri-sulfide and another metal sulfide, forming 2-5% by volume; and at least one abrasive, such as a blend of mineral fiber, magnesium oxide, and mica, forming 10-22% by volume. The friction material further comprises rubber powder in an amount of at least 4% by volume. The brake pad can be formed by a cost effective process consisting essentially of mixing the ingredients, pressing and curing the friction material to a backing plate, and post baking the brake pad.

Abstract: A rubber composition including a diene rubber and, per 100 parts by mass thereof, from 5 to 100 parts by mass of an inorganic filler, and from 0.5 to 40 parts by mass of a polyether polyamide elastomer, and a pneumatic tire using this rubber composition in a cap tread of a tread.

Abstract: The present invention relates to a tyre having a tread comprising a rubber composition that comprises at least: as a first diene elastomer, between 5 and 25 phr of a styrene-nitrile-butadiene terpolymer (SNBR) having a nitrile monomer content between 4 and 18% by weight; a second diene elastomer other than SNBR; a reinforcing filler; a liquid plasticizer, the glass transition temperature of which is below ?20° C. The invention makes it possible to improve the properties of rolling resistance and of grip on wet ground of tire treads.

Abstract: A process for producing a nanocomposite of a halogenated elastomer and an inorganic, exfoliated clay includes the in-situ protonation of a modifier, which may be an alkylamine, arylamine or an alkylarylamine. This process can be integrated with a polymer halogenation process. The nanocomposite so formed has improved air barrier properties and is suitable for use as a tire innerliner or innertube.

Abstract: The invention relates to a tyre tread having a tyre tread rubber composition based on at least one diene elastomer, one reinforcing filler and one vulcanization system, characterized in that the composition comprises a guar gum powder in a proportion of 10 to 40 pce. The invention also relates to a process for obtaining a rubber composition for a tread based on at least one diene elastomer, one reinforcing filler and one vulcanization system which comprises a first phase of thermomechanical kneading of the constituents of the composition, with the exception of the vulcanization system, characterized in that the composition comprises a guar gum powder in a proportion of 10 to 40 pce and in that the guar gum powder is incorporated during the first kneading phase.

Abstract: The present invention aims to provide a tire rubber composition that achieves a good balance of grip performance (especially, wet grip performance), abrasion resistance, cut and chip resistance, low rolling resistance, and kneadability, and a pneumatic tire using the same. The composition comprise: a rubber component including a styrene-butadiene rubber modified by a compound of formula (1): and a non-modified styrene-butadiene rubber; a filler including silica, the filler being in an amount of 80 parts by mass or less per 100 parts by mass of the rubber component; and sulfur in an amount of 0.5-1.5 parts by mass per 100 parts by mass of the rubber component, the modified styrene-butadiene rubber having a bound styrene content of 20-40% by mass and a vinyl content of 30-65% by mass, and the non-modified styrene-butadiene rubber having a bound styrene content of 25-45% by mass and a vinyl content of 10-50% by mass.