Abstract: (1) A carbonaceous material for forming an electrically conductive composition, comprising a vapor grown carbon fiber, each fiber filament of the carbon fiber having an outer diameter of 2 to 500 nm and an aspect ratio of 10 to 15,000, or the carbon fiber containing boron in an amount of 0.01 to 5 mass %, and graphitic particles and/or amorphous carbon particles, wherein the amount of the vapor grown carbon fiber is 10 to 90 mass %, the amount of the graphitic particles is 0 to 65 mass %, and the amount of the amorphous carbon particles is 0 to 35 mass %; (2) an electrically conductive composition comprising the carbonaceous material for forming an electrically conductive composition, and a producing method thereof; (3) an electrically conductive coating material comprising, as an electrically conductive material, the electrically conductive composition, and an electrically conductive coating film and electric device using the electrically conductive coating material.

Abstract: This invention relates to a rubber composition possessing high wear resistance and low heat buildup, and more particularly to a rubber composition comprising 100 parts by mass of a diene polymer and 20-250 parts by mass of a carbon black as a filler, characterized in that the carbon black has a dibutyl phthalate (DBP) absorption number of 40-180 cm3/100 g, a nitrogen adsorption specific surface area (N2SA) of 40-300 m2/g, a tint strength (TINT) of 50-150% and a light transmittance of toluene extract of not less than 90% and a relation between the nitrogen adsorption specific surface area and the light transmittance of toluene extract satisfies the following equation (I): 0.0283×A×(100?B)?40??(I) (wherein A is a nitrogen adsorption specific surface area and B is a light transmittance of toluene extract).

Abstract: A method of decomposing a polycarbonate with water in a supercritical or subcritical state. A high-purity dihydroxy compound which is a constituent component of the polycarbonate can be recovered at a high yield by this decomposition method. This decomposition method is environment-friendly because it does not use an organic solvent, easy to be carried out, has a high decomposition rate and rarely causes a side reaction.

Abstract: Elastomer masterbatch is processed in a continuous compounder having multiple parallel elongate rotors axially oriented in an elongate processing chamber. Optionally, additional materials are compounded into the masterbatch, e.g., additives, other elastomeric compositions, etc. Preferably, the masterbatch then is further processed in an open mill. Excellent control of Mooney Viscosity is achieved. In certain preferred embodiments, elastomer composites are produced by novel continuous flow methods and apparatus in which fluid streams of particulate filler and elastomer latex are fed to the mixing zone of a coagulum reactor to form a coagulated mixture in semi-confined flow continuously from the mixing zone through a coagulum zone to a discharge end of the reactor.

Abstract: Elastomer composites are produced by novel continuous flow methods and apparatus in which fluid streams of particulate filler and elastomer latex are fed to the mixing zone of a coagulum reactor to form a mixture in semi-confined flow continuously from the mixing zone through a coagulum zone to a discharge end of the reactor. The particulate filler fluid is fed under high pressure to the mixing zone, such as to form a jet stream to entrain elastomer latex fluid sufficiently energetically to substantially completely coagulate the elastomer with the particulate filler prior to the discharge end. Highly efficient and effective elastomer coagulation is achieved without the need for a coagulation step involving exposure to acid or salt solution or the like. Novel elastomer composites are produced. Such novel elastomer composites may be cured or uncured, and combine material properties, such as choice of filler, elastomer, level of filler loading, and macro-dispersion, not previously achieved.

Abstract: A polypropylene-based resin composition of drastically improved dimensional stability realized by incorporating a polypropylene resin of specific structure with an inorganic filler of specific particle size, carbon fibers of specific fiber diameter and length, and, as required, an ethylene- and/or styrene-based elastomer. Another polypropylene-based resin composition of well-balanced properties of rigidity, heat-resistance, impact resistance and lightness even essentially in the absence of inorganic filler, realized by compositing a propylene/ethylene block copolymer of specific structure and well-balanced mechanical properties with an ethylene- and/or styrene-based elastomer, and carbon fibers of specific structure.

Abstract: A nanocomposite material suitable for electrical insulation includes a polymer compounded with a substantially homogeneously distributed functionalized nanoparticle filler. The nanocomposite material is produced by compounding the polymer with the functionalized nanoparticle filler by imparting a shear force to a mixture of the polymer and filler capable of preventing agglomeration of the filler whereby the filler is substantially homogeneously distributed in the nanocomposite material. The electrical insulation may be adapted for AC or DC high voltage, and may also be adapted for low or medium voltage to prevent formation of water tree structures.

Abstract: The invention relates to a tool consisting at least partially of plastic material and containing nanoparticles which are included into said plastic material. Said tools exhibiting a high pressure and friction resistance, are used in particular as shaping tools, for example for deep drawing of metallic sheets for vehicle bodies.

Abstract: An elastomeric composition usable for the manufacture of tires, based on at least (i) a diene elastomer, (ii) an inorganic filler as reinforcing filler and (iii), as (inorganic filler/diene elastomer) coupling agent, a organosilicon compound which is at least bifunctional and can be grafted on to the elastomer by means of a sulfur group having a polythiosulfenamide function, of formula: ?Si—A—Sx—NR1R2,??(I) in which: A is a divalent bond group, whether straight-chain or branched, which makes it possible to join the polythiosulfenamide group to a silicon atom of the organosilicon compound; x is an integer or fractional number of from 2 to 4; R1 represents hydrogen or a monovalent hydrocarbon group; R2 represents a monovalent hydrocarbon group selected from among C3-C8 alkyls, whether straight-chain or branched, C5-C10 cycloalkyls, C6-C18 aryls and (C6-C18)aryl-(C1-C8)alkyls; R1 and R2 possibly forming together and with the nitrogen atom to which they are bonded a single hydrocarbon ring.

Abstract: A rubber composition for tire sidewall which comprises a rubber component, which comprises polybutadiene rubber having a content of the cis-1,4-bond of 92% or greater and a content of the vinyl bond of 1.5% or smaller and natural rubber and/or at least one other diene-based synthetic rubber, and 10 to 70 parts by mass of carbon black having a specific surface area by nitrogen adsorption of 20 to 100 m2/g per 100 parts by mass of the rubber component and does not comprise a softener having an aniline point of 50° C. or lower and a tire using the rubber composition for sidewall. Excellent resistance to cut growth is obtained while sufficient workability is surely exhibited.

Abstract: The present invention relates to a pneumatic tire having a rubber component comprised of (A) 100 parts by weight of at least one elastomer containing olefinic unsaturation; (B) 10 to 120 phr of a filler selected from carbon black and silica; (C) 0.1 to 10 phr of N,N?-(m-phenylene) bismaleimide; (D) 0.1 to 0.5 phr of zinc dibenzyl dithiocarbamate; and (E) 0.1 to 5 phr of an additional cure accelerator.

Abstract: Methods of preparing conductive thermoset precursors containing carbon nanotubes is provided. Also provided is a method of preparing conductive thermosets containing carbon nanotubes. The carbon nanotubes may in individual form or in the form of aggregates having a macromorpology resembling the shape of a cotton candy, bird nest, combed yarn or open net. Preferred multiwalled carbon nanotubes have diameters no greater than 1 micron and preferred single walled carbon nanotubes have diameters less than 5 nm. Carbon nanotubes may be adequately dispersed in a thermoset precursor by using a extrusion process generally reserved for thermoplastics. The thermoset precursor may be a precursor for epoxy, phenolic, polyimide, urethane, polyester, vinyl ester or silicone. A preferred thermoset precursor is a bisphenol A derivative.

Abstract: A cement useful for bonding carbon articles or sealing the surfaces of carbon articles to provide a surface useful for, inter alia, composite tooling or other high temperature applications or for bonding of carbon articles together to form larger blocks.

Abstract: The present invention relates to pulverulent compositions based on carbon nanotubes which exhibit an excellent dispersibility in polymer materials and can advantageously be used as reinforcing agents and/or modifiers of conducting and/or thermal properties; they can be easily incorporated in polymer matrices in the masterblend form.

Abstract: Reduced hysteresis silica-containing black sidewall compounds having increased toughness properties are provided, as are methods for preparing the same. Tires comprising the black sidewall compounds prepared according to the present embodiments are also provided.

Abstract: The present invention provides an aromatic polycarbonate resin composition including a resin component containing (A) 50 to 95% by mass of an aromatic polycarbonate resin and (B) 50 to 5% by mass of a polyester resin derived from natural sources and/or a polylactic acid obtained from synthetic lactic acid, and (C) 0.1 to 30 parts by mass of carbon nanotubes compounded in 100 parts by mass of the resin component, the aromatic polycarbonate resin composition being able to afford a molded object free from layer delamination and excellent in electrical conductivity (antistatic property), solvent resistance, flame retardancy, impact resistance, molding appearance, etc. and having good flowability.

Abstract: Graphite nanoplatelets of expanded graphite and composites and products produced therefrom are described. The preferred method of expanding the graphite is by microwaves or other radiofrequency wave treatment of intercalated graphite. The expanded graphite is preferably then crushed to nanometer (substantially all 200 microns or less). The expanded graphite is used in polymer composites. The expanded graphite is particularly useful for batteries, anodes and fuel cells.

Abstract: The present invention relates to encapsulated activated carbon and a method of preparing the same to protect the structure of the activated carbon and preserve the odor absorbing capability of the activated carbon particles. Particularly, the present invention is directed to a method of forming a polymer substrate upon melt processing comprising providing a first master batch of activated carbon particles that are at least partially encapsulated with a non-water soluble amorphous polymer, providing a matrix polymer, mixing the first master batch with the matrix polymer to form a mixture, and extruding the mixture to form a polymer substrate.

Abstract: A new, non-wrapping approach to functionalizing nanotubes, such as carbon nanotubes, in organic and inorganic solvents is provided. In accordance with certain embodiments, carbon nanotube surfaces are functionalized in a non-wrapping fashion by functional conjugated polymers that include functional groups. Various embodiments provide polymers that noncovalently bond with carbon nanotubes in a non-wrapping fashion. For example, various embodiments of polymers are provided that comprise a relatively rigid backbone that is suitable for noncovalently bonding with a carbon nanotube substantially along the nanotube's length, as opposed to about its diameter. In preferred polymers, the major interaction between the polymer backbone and the nanotube surface is parallel ?-stacking. In certain implementations, the polymers further comprise at least one functional extension from the backbone that are any of various desired functional groups for functionalizing a carbon nanotube.

Abstract: A method of producing a carbon fiber composite material includes: a first mixing step of mixing an elastomer and carbon nanofibers at a first temperature; and a second mixing step of mixing a mixture obtained by the first mixing step at a second temperature, and the first temperature is 50 to 100° C. lower than the second temperature.

Abstract: A new, non-wrapping approach to solubilize nanotubes, such as carbon nanotubes, in organic and inorganic solvents is provided. In accordance with certain embodiments, carbon nanotube surfaces are functionalized in a non-wrapping fashion by functional conjugated polymers that include functional groups for solubilizing such nanotubes. Various embodiments provide polymers that noncovalently bond with carbon nanotubes in a non-wrapping fashion. For example, various embodiments of polymers are provided that comprise a relatively rigid backbone that is suitable for noncovalently bonding with a carbon nanotube substantially along the nanotube's length, as opposed to about its diameter. In preferred polymers, the major interaction between the polymer backbone and the nanotube surface is parallel ?-stacking. The polymers further comprise at least one functional extension from the backbone that are any of various desired functional groups that are suitable for solubilizing a carbon nanotube.

Abstract: An electrically conductive resin composition of a polyamide type, characterized in that, (A) 95 to 40% by mass of polyamide resin, (B) 5 to 30% by mass of electrically conductive carbon black, (C) 10 to 40% by mass of an ethylene-?-olefin copolymer having a reactive functional group which is able to react with a terminal group of the polyamide resin and/or an amide group of the main chain and (D) 1 to 10% by mass of a high-density polyethylene resin are compounded; the polyamide resin (A) forms a continuous phase; the ethylene-?-olefin copolymer (C) in particles having an average particle diameter of not more than 2 ?m is present by being dispersed in the continuous phase of the polyamide resin (A); and not less than 80% by mass of the electrically conductive carbon black (B) is present by being dispersed in the polyamide resin phase (A) which is a continuous phase, as well as a cap for fuel tank comprising it.

Abstract: A PTC polymer composition contains: (a) a non-elastomeric polymer mixture in an amount from 20 wt % to 80 wt % based on the weight of the polymer composition; (b) a conductive particulate material in an amount from 20 wt % to 60 wt % based on the weight of the polymer composition; (c) a voltage resistance-enhancing agent that contains particulate metal oxide material in an amount from 1 wt % to 30 wt % based on the weight of the polymer composition; and (d) a polymer stabilizer that contains a thermoplastic elastomer in an amount from 1 wt % to 30 wt % based on the weight of the polymer composition.

Abstract: A conductive resin composition produced by melt-kneading a mixture comprising a polyamide (A), a polyphenylene ether (B) (non-terminal-modified polyphenylene ether and/or terminal-modified polyphenylene ether), a rubbery polymer (C), a conductive carbonaceous material (D) (carbon black and/or carbon fibril), and a low molecular weight modifier compound (E) (compatibility agent), wherein the mixture has the following characteristics: (1) the amount of (D) is 0.2 to 3% by weight, based on the total weight of (A) to (E), (2) the amount of (E) is more than 0.01% by weight and less than 0.20% by weight, based on the total weight of (A) to (E), and (3) the amount (a) of a volatile substance contained in (B) satisfies the following formula: 0?a??7.3×E+1.83, wherein E is the % by weight of (E), based on the total weight of (A) to (E), the amount (a) being expressed in terms of a weight decrease (% by weight) of (B) as measured by subjecting (B) to vacuum drying in vacuo at 180 ° C. for 1 hour.

Abstract: The present invention is directed to a biaxially oriented, heat-set, at least two-layer coextruded film formed from polyethylene terephthalate (PET) or polyethylene 2,6-naphthalate (PEN) that optionally includes additional comonomer-derived units. The film includes a base layer and at least one outer layer. The base layer includes a white pigment and a laser absorber which has been coated with a carbonizing polymer.

Abstract: A nanocomposite composition includes aerogel components and polymeric components and is capable of absorbing water in an amount that is less than an amount that can be absorbed by the polymeric resin components. The nanocomposite has decreased hydrophilicity and improved mechanical and electrical characteristics. Charging members, such as bias transfer rolls and bias transfer belts, include the nanocomposite material.

Abstract: A method of making a composition comprises melt mixing a first mixture comprising a poly(arylene ether) and a compatibilizing agent to form a first melt mixture; and melt mixing a second mixture comprising the first melt mixture and a polyamide, an electrically conductive additive and a flame retardant masterbatch wherein the flame retardant masterbatch comprises a phosphinate and a thermoplastic resin.

Abstract: The present invention relates to a pneumatic tire having a rubber component comprised of (A) 100 parts by weight of at least one elastomer containing olefinic unsaturation; (B) 10 to 120 phr of a filler selected from carbon black and silica; (C) 0.1 to 10 phr of N,N?-(m-phenylene)bismaleamic acid; (D) 0.1 to 0.5 phr of zinc dibenzyl dithiocarbamate; and (E) 0.1 to 5 phr of an additional cure accelerator.

Abstract: The present invention provides a rubber composition for a breaker cushion suppressing exothermic heat and lower of rubber properties and a tire using the same. A rubber composition for a breaker cushion, comprising 25 to 35 parts by weight of carbon black having an iodine adsorption amount of 70 to 120 mg/g and 0.5 to 2.0 parts by weight of a resorcin condensate or a modified resorcin condensate based on 100 parts by weight of a rubber component, and a tire having a breaker cushion using the same.

Abstract: The present invention relates to a rubber composition containing a diene based elastomer reinforced with rubber reinforcing carbon black and/or silica which contains an antidegradant comprised of N-1,3-dimethylbutyl-N?-phenyl-p-phenylene diamine (6-PPD) together with a dispersion of a methyl isobutyl ketone (MIBK)-adsorbing activated carbon. The invention further relates to a tire having a component thereof containing such rubber composition.

Abstract: In some embodiments, a coating comprises a host material and a plurality of carbon nanotubes dispersed in the host material to form a composite coating. The weight percentage of carbon nanotubes in the composite coating may be less than 2.5 percent. More than ninety-five percent of the plurality of carbon nanotubes may be single wall carbon nanotubes.

Abstract: Disclosed is an ethylene-propylene-diene terpolymer having isotactic polypropylene crystallinity compounded with a blend rubber wherein the terpolymer can be present in an amount effective to improve tack, aged tensile strength retention, fatigue resistance, ozone cracking resistance, and reversion resistance. Also disclosed is an elastomer composition wherein the terpolymer can have at least 60 wt % propylene-derived units, at least 6 wt % ethylene-derived units and from 0.3 to 10 wt % diene-derived units, and a tire sidewall composition comprising from 10 to 30 phr terpolymer, from 20 to 60 phr natural rubber, from 20 to 60 phr polybutadiene rubber, and an optional secondary blend rubber. Also disclosed is a vulcanizate of the elastomer composition, and articles, tire sidewalls, tires, retreaded tires, bias truck tires, off-road tires, and passenger automobile tires made with the vulcanizate. Further disclosed are processes for making molded articles and tires, and for retreading tires.

Abstract: This invention relates to a silica reinforced rubber composition containing an ionic compound and article having a component thereof. The invention particularly relates to an article such as a rubber tire having a component of such rubber composition. Said ionic compound is composed of a combination of an organic cation moiety and an organic or inorganic anion moiety. Said ionic compound is desirably an ionically conductive ionic compound. The invention particularly relates to improvement of one or more physical properties of a rubber composition by an inclusion of such ionic compound and/or providing a path of least electrical resistance for a electrically resistive component of an article such as a tire by an inclusion in the rubber composition of said component of an ionically conductive ionic compound composed of a combination of an organic cation moiety and an organic or inorganic anion moiety.

Abstract: Intumescent, electrical installation systems which comprise an injection molding material of polyolefins or polyimides in combination with intumescent additives, the melting points of the polyolefins and of the polyimides being lower than the intumescence temperature of the intumescent additives.

Abstract: Highly oil-filled ethylene/alpha-olefin/diene (EAODM) polymers in a free flowing powder or pellet form, processes for preparing these polymers, and the use of these polymers to prepare thermoplastic vulcanizates (TPV) are provided. Thermoplastic vulcanizate premixes can be prepared with the EAODM polymers and thermoplastic polymers, the premixes being easily converted into TPVs.

Abstract: A method for manufacturing a high-quality rubber product while preventing carbon black from separating from the rubber polymer and from reaggregating, without deteriorating the work environment, and the rubber product obtained by the method. The method for manufacturing a rubber product comprising preparing a rubber composition containing carbon black mixed in rubber by a rubber kneading procedure including a mastication process and a kneading process; and vulcanizing and molding the rubber composition to manufacture a rubber product, wherein, together with the carbon black, a monofunctional acrylic monomer is mixed in the rubber in the mastication process.

Abstract: A method and types of composites in which particles are oriented within a melt-processable material or are arranged into networks in response to chaotic advection. A masterbatch comprising a melt-processable material and particles is supplied to a blender in which chaotic advection is maintained for a specified period. A second, melt-processable material may be supplied to the blender simultaneously. Resulting composites include extrusions with oriented inorganic platelets that reduce permeation or electrically conducting plastics and other functional materials.

Abstract: The present invention provides a black ink composition comprising (1) water, (2) carbon black, and (3) a fine particle emulsion, wherein (A) the content of said carbon black is less than 0.4 wt %, and wherein (B) the solid content of said fine particle emulsion is 20 times or more the content of said carbon black. Also disclosed are an ink set comprising the black ink composition, a recording method using the ink set, and recorded matter obtained by the method.

Abstract: Plastic composite material made up of a polymer matrix with a concentration of a nanofiber material and with a concentration of graphite-based particles. The matrix additionally contains at least one inorganic filler in the form of silicate-based particles or in the form of glass particles.

Abstract: Disclosed herein is a composite film comprising a layer of an organic polymer, wherein the organic polymer is an elastomer; the organic polymer having an elastic modulus of less than or equal to about 105 Pascals when measured at room temperature; and a bundle of carbon fibers disposed in the layer of organic polymer; each bundle comprising a column and an end face; each bundle also having a longitudinal axis that is substantially parallel to the column and passes through the center of the column; the end face of the carbon fiber bundle intercalated with nitrate ions and fibrillated so as to have a surface area measured perpendicular to the longitudinal axis that is about 110% to about 250% greater than the surface area of a cross-section of the carbon fiber bundle measured at the column.

Abstract: A coating formulation is disclosed that is capable of imparting, onto the treated substrate, an excellent adsorption performance, good print appearance, and enhanced rub-off resistance. Furthermore, the disclosed formulation has good ink stability and offers high quality print appearance throughout long printing runs of high speeding printing applications. The formulation comprises an activated carbon having a particle size of less than 1 micron and a binder, wherein an amount of the binder by weight is in a range of about 30 parts to 100 parts per 100 parts of the activated carbon, and the formulation has a dry basis BET Surface Area of greater than 100 m2/g.

Abstract: A thermal interface material (TIM) including a mechanically compliant matrix material which contains thermally conductive particles and thermally conductive nanofibers is provided. Such a TIM provides enhanced thermal conductivity without excessive viscosity when the nanofiber volume concentration is above a threshold value for enhanced thermal conductivity.

Abstract: A process for the preparation of a functionalized, coupled or starred block copolymer which is usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, one at least of said blocks consisting of a polyisoprene and at least one other block consisting of a diene elastomer other than a polyisoprene the molar ratio of units originating from one or more conjugated dienes of which is greater than 15%.

Abstract: A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base catalyst. The resulting resin is characterized by a relatively low level of free resorcinol; and rubber compounds containing the resin exhibit low fuming, lower Mooney viscosity (which means better processing), better dynamic stiffness properties (G?), and/or good tear properties. Therefore, the resulting resin can be used as a methylene acceptor compound in a vulcanizable rubber composition.

Abstract: A flame-retardant resin composition comprises (A) abase resin; (B) a flame retardant comprising (B1) at least one aromatic resin selected from a polyphenylene oxide-series resin and a polyphenylene sulfide-series resin, (B2) a phosphoric ester, and (B3) a nitrogen-containing cyclic compound; and (C) a styrenic resin having a melt flow rate of not more than 8 g/10 minutes. The base resin may be a polyester-series resin. The styrenic resin (C) may be a styrenic resin having a melt flow rate of 0.1 g/10 minutes to not more than 5 g/10 minutes. The phosphoric ester (B2) may be a condensed phosphoric ester, and the nitrogen-containing cyclic compound (B3) may be a polyphosphate of an amino group-containing triazine compound, a polyphosphoric acid amide, or others. The present invention provides a flame-retardant resin composition which has been flame-retarded without using a halogen-containing flame retardant.

Abstract: A tire, tire lining or inner tube, containing a polymer composite, made of at least one rubber and/or at least one elastomer and a modified graphite oxide material, which is a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g.

Abstract: A process for forming a tire component, the process comprising the steps of introducing a vulcanizable polymer, a curative, a first carbon black characterized by an iodine adsorption number, per ASTM D1510, that is greater than 60 g/kg, and a second carbon black characterized by an iodine adsorption number, per ASTM D1510, that is less than 60 g/kg to form a vulcanizable composition, fabricating a tire component from the vulcanizable composition, and curing the tire component.

Abstract: A masterbatch is produced which is excellent in thermal stability by limiting the comonomer content and thermal stability of a polyoxymethylene copolymer, and further implements a method of feeding the polyoxymethylene resin and carbon in the extrusion step. Moreover, the composition containing the masterbatch retains mechanical properties (elastic modulus, impact resistance, and vibration fatigue characteristic), chemical resistance, and moldability and also has conducting capability.

Abstract: A tire tread incorporating an elastomeric composition reinforced with silica, based on at least (phr=parts by weight per hundred parts of diene elastomer): (i) a diene elastomer; (ii) as reinforcing filler, more than 80 phr of an inorganic filler constituted in its entirety or in part by a silica (referred to as LS) having the following characteristics: (a) a BET specific surface area of between 50 and 100 m2/g; (b) an average particle size, dW, of between 50 and 350 nm; (iii) a coupling agent providing the bond between the reinforcing inorganic filler and the diene elastomer; (iv) a vulcanization system based on sulfur. Preferably, this LS silica furthermore has a disagglomeration rate ? greater than 5×10?3 ?m?1/min (measured in the ultrasound disagglomeration test).

Abstract: An elastomer composition based on at least one diene elastomer, an inorganic filler as reinforcing filler, a polyfunctional organosilane as (inorganic filler/diene elastomer) coupling agent bearing at least two functions denoted “X” and “Y” which are graftable, on the one hand, to the elastomer by means of the X function and, on the other, to the inorganic filler by means of the Y function, characterized in that said Y function is a hydroxysilyl function (?Si—OH). Preferably, this organosilane is a hydroxysilane polysulfide, the diene elastomer is selected from the group consisting of polybutadienes, natural rubber, synthetic polyisoprenes, butadiene copolymers, isoprene copolymers and the reinforcing inorganic filler is a siliceous or aluminous filler of the highly dispersible type. Tires or semi-finished products for tires, in particular treads for tires comprising a composition according to the invention.