Entries |
Document | Title | Date |
20090036567 | PROCESS FOR PRODUCING MODIFIED DIENE POLYMER RUBBER - There is provided a process for producing a modified diene polymer rubber comprising the steps of:
| 02-05-2009 |
20090043011 | WET FRICTION MATERIAL - In a wet friction material, to be able to reduce a drag torque, while being greater in a disengagement feature and a positive μ-V slope characteristic by keeping a pore diameter large without generating strength reduction or increase in settling quantity. | 02-12-2009 |
20090054550 | Rubber Composition for Tread and Tire Having Tread Using Same - The present invention provides a rubber composition for a tread which can improve both of grip performance and rolling resistance in good balance and a tire having a tread prepared by using it. The rubber composition for a tread of the present invention contains 30 to 80 parts by weight of a silica having a pH of 7.1 to 12.0 when dispersed in water to prepare a 5% aqueous dispersion; and not more than 10 parts by weight of a carbon black on the basis of 100 parts by weight of a rubber component comprising an epoxidized natural rubber and the tire of the present invention has a tread prepared by using the rubber composition. | 02-26-2009 |
20090124724 | Rubber Composition And Pneumatic Tire - A rubber composition that can improve rolling resistance of a tire without impairing other performances such as processability or wet performance, and a pneumatic tire using the same are provided. The rubber composition includes a diene rubber as a rubber component, and clay treated with a lignin sulfonate. | 05-14-2009 |
20090275675 | RUBBER COMPOSITION FOR TREAD AND PNEUMATIC TIRE USING THE SAME - A method of compounding a modified, epoxidized natural rubber for use as a tire tread which includes the steps of modifying an epoxidized natural rubber containing a ring-opened epoxy group, compounding the modified, epoxidized natural rubber with another rubber, to form a rubber compound, together with silica and/or carbon black to form a rubber composition, and forming the rubber composition into a tire tread. | 11-05-2009 |
20110039976 | Tire having a Tread Provided with Cavities Containing a Specific Filling Material - A tire having a tread, said tread being provided with a plurality of cavities, at least some of said cavities having a filling composition based on at least: a diene elastomer; more than 50 phr of filler (denoted filler A), the particles of which are nanoparticles having an average size (by weight) of less than 500 nm; and more than 70 phr of filler (denoted filler B), the particles of which are microparticles having a median particle size (by weight) of greater than 1 μm. This filling composition is sufficiently cohesive to ensure excellent mechanical behaviour of the cavities. It also has the capability of progressively wearing during running, without cracking, more quickly than the constituent composition of the tread itself. | 02-17-2011 |
20110065833 | Rubber mixture comprising precipitated silicic acid - The invention relates to a rubber mixture, in particular for pneumatic vehicle tires, bands, and belts, having improved abrasion behavior. The rubber mixture is characterized by the following composition: at least one diene rubber and—at least one precipitated silicic acid having a CTAB surface area greater than or equal to 150 m | 03-17-2011 |
20110086943 | RUBBER COMPOSITION FOR USE IN TIRE TREADS - A rubber composition for use in tire treads including 100 parts by mass of a diene rubber and from 70 to 100 parts by mass of silica, wherein the diene rubber includes from 50 to 90 mass % of a terminal-modified styrene-butadiene rubber having a hydroxy group on an end of the molecule, and from 10 to 25 mass % of a butadiene rubber; the silica has a BET specific surface area of from 45 to 550 m | 04-14-2011 |
20110144233 | Process for modifying natural rubber, and modified natural rubber - A process for modifying natural rubber and modified natural rubber with improved processing performance. The process for modifying natural rubber includes at least the following process steps: comminuting the natural rubber in a first process step; blending and purifying the natural rubber in a second process step; further comminuting the natural rubber in a third process step; and, drying the natural rubber in a fourth process step. The modified natural rubber is modified by at least four process steps. | 06-16-2011 |
20110152405 | Diene Rubber Composition for Tire Including a Silica as a Reinforcing Filler - A diene rubber composition for tires based on at least (i) one diene elastomer, (ii) one reinforcing inorganic filler and (iii) one coupling agent which provides the bonding between the inorganic filler and the elastomer. The inorganic filler comprises at least one silica capable of being obtained by the preparation process of the type comprising the reaction of a silicate with an acidifying agent, whereby a silica suspension is obtained, followed by the separation and the drying of this suspension. The reaction of the silicate with the acidifying agent is carried out according to the following successive stages: (i) an aqueous suspension of precipitated silica, exhibiting a pH of between 2.5 and 5.3, is brought into contact (mixing) with acidifying agent and silicate, in such a way that the pH of the reaction medium is maintained between 2.5 and 5.3, (ii) silicate is added to the reaction medium obtained, so as to increase the pH of the reaction medium up to a value of between 4.7 and 6.3. | 06-23-2011 |
20110166254 | RUBBER COMPOSITION FOR TIRE AND STUDLESS TIRE - An object of the present invention is to provide a rubber composition for a tire, which can achieve well-balanced improvement in fuel economy, abrasion resistance, and performance on ice and snow, and a studless tire for a passenger vehicle using the rubber composition. The present invention relates to a rubber composition for a tire, including a rubber component and silica, wherein the rubber component contains a modified natural rubber with a phosphorus content of 200 ppm or less, and butadiene rubber, and the silica has a CTAB specific surface area of 180 m | 07-07-2011 |
20110190416 | Rubber Composition for a Winter Tire Tread - A rubber composition usable as tread for a winter tire, having a high grip on melting ice, comprising at least one diene elastomer such as natural rubber and/or a polybutadiene, more than 30 phr of a liquid plasticizing agent, between 50 and 150 phr of a reinforcing filler such as silica and/or carbon black, and between 5 and 40 phr of magnesium sulphate microparticles. | 08-04-2011 |
20110245370 | TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE - The invention aims to provide a tire rubber composition that is excellent in the low heat build-up property (fuel economy), wet grip performance, and abrasion resistance, and can be suitably used for a tread (cap tread); and a tire rubber composition that is excellent in the low heat build-up property and breaking properties, and can be suitably used for a base tread or sidewall. The composition comprises: a diene polymer; and silica, the diene polymer being a modified diene polymer obtainable by reacting compounds (A) and (B), the compound (A) being an active alkali metal-terminated conjugated diene polymer obtainable by polymerizing a conjugated diene monomer alone or with an aromatic vinyl monomer, in the presence of compound (C), the compound (B) being a modifying agent having a functional group, and the compound (C) being a chemical species obtainable by reacting an organic alkali metal compound with compound of formula (1): | 10-06-2011 |
20110288200 | POLYMERS FUNCTIONALIZED WITH POLYCYANO COMPOUNDS - A method for preparing a functionalized polymer, the method comprising the steps of polymerizing monomer to form a reactive polymer, and reacting the reactive polymer with a polycyano compound. | 11-24-2011 |
20110294915 | RUBBER COMPOUND CONTAINING A BLOCKED MERCAPTOSILANE COUPLING AGENT - The invention relates to a rubber compound containing no or less than 0.5 phr zinc, which can be used for the manufacture of tyres, the compound being based on at least: a diene elastomer; a sulphur-based crosslinking system; an inorganic filler as reinforcing filler; and a blocked mercaptosilane of the following general formula (I) in which formula (I): R | 12-01-2011 |
20110301261 | Silane-Sulfide Chain End Modified Elastomeric Polymers - A chain end modified polymer comprising the reaction product of a living anionic elastomeric polymer and a silane-sulfide modifier A preferred class of modifiers includes compounds represented by the formula: (RO)x(R) | 12-08-2011 |
20110319519 | RUBBER COMPOSITION AND PNEUMATIC TIRE - A rubber composition from which a vulcanized rubber suitable for producing, for example, a pneumatic tire having excellent abrasion resistance, breaking strength, rolling resistance, wet skid resistance, and the like can be prepared. The rubber composition comprises a rubber component (A) comprising a diene rubber comprising 20 mass % or more of a modified styrene-butadiene copolymer (a1) and 5 mass % or more of a modified conjugated diene polymer (a2), and a filler (B), wherein the modified conjugated diene polymer (a2) is a conjugated diene polymer obtained by modifying the active terminals of a conjugated diene polymer having a cis-1,4 bond content of 80% or higher, with an alkoxysilane compound, and the filler (B) comprises at least either of 2 to 100 mass parts, relative to 100 mass parts of the rubber component (A), of carbon black (b1) and 30 to 100 mass parts, relative to 100 mass parts of the rubber component (A), of silica (b2). | 12-29-2011 |
20120225974 | RUBBER COMPOSITION FOR TIRE AND PNEUMATIC TIRE - A rubber composition for tire, comprising at least a rubber component and an inorganic filler, wherein the inorganic filler has an angle of repose of 40 degrees or more, a Mohs' hardness of 2.0 or less, a BET specific surface area (BETS) (m | 09-06-2012 |
20120252928 | FUNCTIONALIZED DIENE ELASTOMER, AND RUBBER COMPOSITION CONTAINING SAME - The present invention relates to a specific functionalized diene elastomer. This functionalized elastomer exhibits a reduced cold flow without, however, damaging the properties of a reinforced rubber composition in which it is present, in particular the processing properties and the hysteresis properties. This functionalized diene elastomer carries, at the chain end, a silanol functional group or a polysiloxane block having a silanol end and is partially coupled by or star-branched by tin. | 10-04-2012 |
20120259035 | METHOD FOR PREPARING A MASTERBATCH OF SYNTHETIC DIENE ELASTOMER AND SILICA - The invention relates to a method for preparing a silica/synthetic diene elastomer masterbatch, comprising the following successive steps:
| 10-11-2012 |
20120259036 | FRICTION MATERIAL AND METHOD FOR PRODUCING FRICTION MATERIAL - To provide a highly heat-resistant brake pad adaptable to high temperatures/high loads and producible only by adding a baking step to the same production process as that for an organic friction material. | 10-11-2012 |
20120283354 | TYRE RUBBER COMPOSITION AND PNEUMATIC TYRE - The present invention provides a tire rubber composition which has good silica dispersibility and improves in terms of the reinforcement, the abrasion resistance, the mechanical strength, the rolling resistance, the wet grip performance, and the handling stability on a dry road surface in a balanced manner; and provides a pneumatic tire produced using the tire rubber composition. The present invention relates to a tire rubber composition, comprising: a rubber component; a first silica; and a second silica, wherein the first silica has a CTAB specific surface area of 180 m | 11-08-2012 |
20130030083 | RUBBER COMPOSITION FOR TREAD, METHOD FOR PRODUCING THE SAME, AND HEAVY-LOAD TIRE - The present invention provides a rubber composition for a tread which enables improvement in fuel economy, breaking performance, and abrasion resistance in a balanced manner; a method for producing the rubber composition; and a heavy-load tire. The present invention relates to a rubber composition for a tread of a heavy-load tire, including a modified natural rubber having a phosphorus content of 200 ppm or less, and carbon black. | 01-31-2013 |
20130090409 | RUBBER COMPOSITION AND PNEUMATIC TIRE - The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): | 04-11-2013 |
20130096228 | FRICTION MATERIAL - In accordance with the present invention, there is provided a friction material. The friction material of the present invention includes a fibrous material, a binder, and a friction modifier. The friction modifier contains an artificial graphite and an inorganic filler. The artificial graphite has an average particle diameter of 1,000 to 3,000 μm. The inorganic filler has a plurality of convex parts. | 04-18-2013 |
20130123387 | RUBBER COMPOSITION FOR UNDERTREAD, AND PNEUMATIC TIRE - The present invention provides a rubber composition for an undertread, which has improved in processability, fuel economy, and tensile properties in a balanced manner, and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for an undertread, including: a rubber component containing a modified natural rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the modified natural rubber is contained in an amount of 5% by mass or more per 100% by mass of the rubber component. | 05-16-2013 |
20130158162 | FRICTION MATERIAL - There is provided a friction material. The friction material includes a fibrous material, a friction modifier, and a binder. The friction material contains potassium titanate powders, steel fibers, calcium pyrophosphate and iron oxide. An amount of the potassium titanate powders may be 10 to 30 mass %. An amount of the steel fibers may be 1 to 7 mass %. An amount of the calcium pyrophosphate may be 5 to 20 mass %. An amount of the iron oxide may be 1 to 5 mass %. | 06-20-2013 |
20130203888 | COPPER-FREE CERAMIC FRICTION MATERIAL AND PREPARATION METHOD THEREOF - The invention discloses a copper-free ceramic friction material and a preparation method thereof. The friction material at least contains the following materials in mass content: 2-30% of alkaline earth-based metal compound and 2-30% of carbon fiber, wherein the alkaline earth-based metal compound is M | 08-08-2013 |
20130261221 | Elastomer Formulations - This present invention relates to carbon nanotubes as fillers in composites with materials such as elastomers, thermosets and thermoplastics. A further feature of this invention relates to the development of a concentrate of carbon nanotubes with an elastomer wherein the concentrate can be further diluted with an elastomer and other polymers and fillers using conventional melt mixing. | 10-03-2013 |
20130289161 | Automotive Ceramic Friction Material Free from Asbestos and Metal and Preparation Method Thereof - An automotive ceramic friction material free from asbestos and metal and preparation method thereof are provided. The material includes the following components: organic adhesive, reinforced fiber, friction-increasing agent, antifriction agent and fillers. The material has high coefficient of friction, stable braking performance, low heat fading, low wear resistance and long service life. | 10-31-2013 |
20130338255 | RUBBER COMPOSITION FOR TIRE TREAD - A rubber composition comprises a diene rubber including not less than 25% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 25 to 65 parts by weight of a filler, the filler comprising not less than 50% by weight of silica. The silica has a DBP absorption number of 190 to 250 ml/100 g, an N | 12-19-2013 |
20140005296 | COPOLYMER OF CONJUGATED DIENE COMPOUND AND NON-CONJUGATED OLEFIN, RUBBER COMPOSITION, RUBBER COMPOSITION FOR TIRE TREAD, CROSSLINKED RUBBER COMPOSITION AND TIRE | 01-02-2014 |
20140011909 | RUBBER COMPOSITION FOR USE IN TIRE TREADS - A rubber composition for use in tire treads comprises a diene rubber including not less than 40% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 66 to 110 parts by weight of a filler. The filler comprises not less than 50% by weight of silica. The modified conjugated diene polymer rubber is obtained by copolymerizing a conjugated diene monomer unit and an aromatic vinyl monomer unit in a hydrocarbon solvent using an organic active metal compound as an initiator. A resulting active conjugated diene polymer chain thereof has a terminal modified group, obtained by reacting at least one type of compound having a functional group that is reactable with the active terminal of the polymer chain. Moreover, the terminal modified group has a functional group that interacts with the silica. | 01-09-2014 |
20140243447 | CONJUGATED DIENE POLYMER END-MODIFIED WITH ALKOXYSILANE DERIVATIVE - The present invention relates to a conjugated diene polymer end-modified with an alkoxysilane derivative. More particularly, the present invention relates to an end-modified conjugated diene polymer, wherein an alkoxysilane derivative having an ether group and a dialkylamino group is bonded as end modifier to an end of a conjugated diene polymer, which is useful as a rubber material for a tire tread owing to improved compatibility with an inorganic reinforcing agent and improves dynamic mechanical properties such as wet traction, rolling resistance, Mooney viscosity, processability, etc. | 08-28-2014 |
20140249247 | METHOD FOR PREPARING A MASTERBATCH OF DIENE ELASTOMER AND SILICA - Preparation of a masterbatch of diene elastomer and silica including preparing at least one silica dispersion in water; bringing into contact and mixing an elastomer latex and the aqueous silica dispersion in the presence of a metal salt in order to obtain a coagulum; and recovering the coagulum and drying the recovered coagulum in order to obtain the masterbatch. The molar content of zinc cations, defined as the number of moles of zinc cations of the zinc salt per BET unit area of the silica, is between 1.19*10 | 09-04-2014 |
20140256845 | METHOD FOR PREPARING A MASTERBATCH OF NATURAL RUBBER AND MAGNESIUM-DOPED SILICA - Method for preparing a silica/natural rubber masterbatch, including: doping the silica with magnesium; preparing at least one dispersion of the resulting doped silica in water; bringing a natural rubber field 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. | 09-11-2014 |
20140364536 | PROCESS FOR PRODUCING MODIFIED POLYMER, DIENE POLYMER, RUBBER COMPOSITION AND PNEUMATIC TIRE - A polymer having a carbon-carbon double bond in a main chain is decomposed by subjecting the carbon-carbon double bond to oxidative cleavage using an oxidizing agent such as periodic acid to decrease the molecular weight, polymer chains of the decomposed polymer are combined by changing acido-basic properties such that a system containing the decomposed polymer becomes basic when acidic and becomes acidic when basic, and a modified polymer in which the structure has been changed is obtained. By this, a functional group can be incorporated in the main chain structure of a polymer. A rubber composition comprising a rubber component containing the modified polymer, and a filler compounded therewith, and a pneumatic tire comprising the rubber composition are provided. | 12-11-2014 |
20150045474 | MODIFIED CONJUGATED DIENE POLYMER AND METHOD FOR PREPARING THE SAME - Disclosed are a modified conjugated diene polymer and a method for preparing the same. Provided are advantageously a modified conjugated diene polymer and a method for preparing the same which provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads. | 02-12-2015 |
20150126642 | HALOGENATED DIENE RUBBER FOR TIRES - A rubber composition is provided that includes a partially halogenated diene polymer that has a controllable microstructure, and no more than about 50% of the n repeat units are in blocks of three or more consecutive units. In embodiments, a reinforcing filler is also included in the rubber composition. In embodiment, the rubber composition is formed into a tire component. A method of making the composition is also provided. | 05-07-2015 |
20160024270 | CARBON BLACK COMPOSITIONS - Suggested is a carbon black composition showing a narrow Aggregate Size Distribution (ASD) characterized by a ΔD | 01-28-2016 |
20160046750 | MODIFIED CONJUGATED DIENE POLYMER AND METHOD FOR PREPARING THE SAME - Disclosed are a modified conjugated diene polymer and a method for preparing the same. Provided are advantageously a modified conjugated diene polymer and a method for preparing the same which provide superior compatibility with an inorganic filler, heat generation, tensile strength and abrasion resistance, low fuel consumption and excellent resistance on wet roads. | 02-18-2016 |
20160083553 | RUBBER COMPOSITION AND PNEUMATIC TIRE - The present invention provides rubber compositions that can achieve both abrasion resistance and low heat build-up properties, and pneumatic tires including such rubber compositions. The present invention relates to a rubber composition containing one or more carbon blacks, at least one of which is produced from a feedstock oil that has a BMCI value of not greater than 150 and an aliphatic hydrocarbon content of not less than 30% by mass. | 03-24-2016 |
20160096947 | RUBBER COMPOSITION AND PNEUMATIC TIRE - An object of the present invention is to provide a rubber composition which can further improve abrasion resistance without deterioration in energy efficiency, and a pneumatic tire using the rubber composition. The rubber composition comprises a polymer mixture obtained by modifying a polymer composed of at least one of a conjugated diene compound and an aromatic vinyl compound with a compound having at least one of an ester group and a carboxyl group; at least one of tetraamines; and silica, the polymer mixture having a weight-average molecular weight of 1.0×10 | 04-07-2016 |
20170233545 | PNEUMATIC TIRE | 08-17-2017 |
20190144641 | RUBBER COMPOSITION, CROSSLINKED RUBBER, TIRE AND RUBBER ARTICLE | 05-16-2019 |
20190144655 | TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE | 05-16-2019 |