Abstract: The present invention has its object to provide: a rubber composition which includes a novel polymer having a specific nitrogen-containing compound and has an excellent balance between fuel economy and wet grip performance; and a tire produced using the rubber composition, which has the above properties. The present invention relates to a polymer obtainable by copolymerizing a conjugated diene compound and/or an aromatic vinyl compound with a nitrogen-containing compound having a specific structure.

Abstract: The present invention provides a rubber composition having more improved low heat build-up property and abrasion resistance, especially a rubber composition useful for the rubber composition used for a tread of tire, and the present invention also provides a tire having a tread prepared using the rubber composition. The rubber composition is one comprising 15 to 150 parts by weight of silica on the basis of 100 parts by weight of a rubber component, wherein the rubber component comprises not less than 10% by weight of a butadiene rubber which has a vinyl content of not more than 35% by weight and is modified with an un-substituted aminosilane compound.

Abstract: A rubber composition for reinforcing a side having both low exothermic property and high hardness is provided. The invention relates to a rubber composition for reinforcing a side of a run flat tire, comprising 10 to 100 parts by weight of carbon black having a nitrogen adsorbing-specific area of 30 to 100 m2/g and a dibutyl phthalate oil absorption amount of at least 50 ml/100 g, at least 2 parts by weight of sulfur or a sulfur compound, and 5 to 120 parts by weight of (1) a lamellar alumina powder or (2) fluorine-containing mica having an aspect ratio of 3 to 50 based on 100 parts by weight of a diene rubber component.

Abstract: The object of the present invention is to provide a rubber composition for base tread enhancing a low fuel consumption property of a vehicle. A rubber composition for base tread comprises a rubber composition containing 15 to 80% by weight of a butadiene rubber obtained by copolymerizing a compound represented by the formula 1, wherein R1 represents an amino group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group, a mercapto group or a derivative thereof.

Abstract: The invention provides a rubber composition that is superior in low heat build-up property and wear resistance. It is a manufacturing method of a rubber composition containing 30 to 150 parts by mass of silica and 0.5 to 10 parts by mass of an organic vulcanization agent represented by the following general formula (1) to 100 parts by mass of a rubber component, including a first kneading step of kneading the organic vulcanization agent and silica into the rubber component, and a second kneading step of kneading a vulcanization agent and a vulcanization accelerator thereafter: R1—(R—Sx)n—R2 ??(1) (wherein R is (CH2—CH2—O)m—CH2—CH, and R1 and R2 are independently hydrogen, a methyl group, a thiol group, a hydroxy group, a carboxyl group, or an aldehyde group, X is an integer of 3 to 6, n is an integer of 10 to 400, and m is an integer of 1 to 5).

Abstract: 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.

Abstract: The present invention can provide a rubber composition, in which all of strength at break, low heat-build up property, run-flat durability and low fuel consumption can be improved since the rubber composition comprises 5 to 120 parts by weight of flake-like graphite having an average aspect ratio of 3 to 80 and an average particle diameter of 2 to 80 ?m on the basis of 100 parts by weight of a diene rubber component, and a run-flat tire using the rubber composition.

Abstract: The present invention relates to a run flat tire having improved durability during a blowout, an increased running distance and velocity, and using for a side portion reinforcing layer a rubber composition including a rubber component containing 20 to 80% by mass of styrene-butadiene rubber including 5 to 60% by mass of syndiotactic 1,2-polybutadiene crystal, and 10 to 80% by mass of natural rubber and/or polyisoprene rubber, and carbon black blended in an amount of 10 to 80 parts by mass with 100 parts by mass of the rubber component. The rubber composition preferably contains a C5-based petroleum resin having a number-average molecular weight of 300 to 10000, which is obtained by polymerizing C5-based petroleum hydrocarbon, in an amount of 0.5 to 10 parts by mass with respect to 100 parts by mass of the rubber component.

Abstract: The present invention provides a run-flat tire that can improve both of ride quality and run-flat performance. The run-flat tire of the present invention comprises a sidewall-reinforcing layer prepared by using a rubber composition comprising non-metallic short fibers having an average fiber diameter of 1 to 100 ?m and an average fiber length of 0.1 to 20 mm in an amount of 5 to 120 parts by weight on the basis of 100 parts by weight of a diene rubber, the non-metallic short fibers being oriented in the circumferential direction of the tire.

Abstract: The present invention can provide a rubber composition for a bead apex comprising 20 to 120 parts by weight of a silica and 5 to 80 parts by weight of a graphite on the basis of 100 parts by weight of a rubber component comprising a natural rubber in an amount of not less than 30% by weight, use of which makes it possible to consider an effect on environment, prepare for decrease in petroleum supply in future, and reduce rolling resistance and improve steering stability, and a tire prepared by using it.

Abstract: There is provided a rubber composition for a sidewall, use of which makes it possible to consider an effect on environment, prepare for decrease in petroleum supply in future and further improve tear strength, flex crack growth resistance and weather resistance. The rubber composition comprises 15 to 120 parts by weight of a white filler and 5 to 50 parts by weight of graphite having an average particle diameter of 3 to 50 ?m on the basis of 100 parts by weight of a rubber component comprising a natural rubber in an amount of not less than 30% by weight.

Abstract: A rubber composition for a tire having improved grip performance on an ice snow road surface while maintaining abrasion resistance performance, containing 5 to 150 parts by mass of an aromatic vinyl polymer and 5 to 200 parts by mass of silica based on 100 parts by mass of a diene-based rubber component containing not less than 20% by mass of a natural rubber and not less than 5% by mass of polybutadiene. It is preferable that a cis content of the polybutadiene is not less than 93%, and a weight average molecular weight of the aromatic vinyl polymer is 300 to 10000.

Abstract: The present invention provides a rubber composition having more improved low heat build-up property and abrasion resistance, especially a rubber composition useful for the rubber composition used for a tread of tire, and the present invention also provides a tire having a tread prepared using the rubber composition. The rubber composition is one comprising 15 to 150 parts by weight of silica on the basis of 100 parts by weight of a rubber component, wherein the rubber component comprises not less than 10% by weight of a butadiene rubber which has a vinyl content of not more than 35% by weight and is modified with an un-substituted aminosilane compound.

Abstract: There is provided a run flat tire having a side reinforcing layer in which low exothermic property and high hardness are compatible and durability is improved. A rubber composition containing 10 to 100 parts by weight of carbon black with a nitrogen adsorption specific area of 30 to 100 m2/g and a dibutyl phthalate oil absorption amount of 50 ml/100 g or more and 2 parts by weight or more of sulfur or a sulfur compound, based on 100 parts by weight of a rubber component containing 10 to 50% by weight of a conjugated diolefin polymer or a copolymer of a diolefin and an aromatic vinyl compound having a primary amino group and an alkoxysilyl group and having a glass transition point of ?30° C. or less in which a bifunctional or more monomer is copolymerized in a polymer chain and/or at least a portion of a (co)polymer chain is coupled with a bifunctional or more coupling agent, and a run flat tire having a side reinforcing layer comprising the rubber composition.

Abstract: A rubber composition and a tire made therefrom in which rolling resistance can be reduced without lowering wet grip performance, wherein the rubber composition contains a rubber component and 15 to 150 parts by weight of silica having a nitrogen adsorbing-specific surface area of 20 to 500 m2/g, on the basis of 100 parts by weight of the rubber component, and wherein the rubber component includes not less than 15% by weight of a styrene-butadiene rubber (1) containing a styrene amount of not less than 33% by weight and a vinyl amount of not less than 30% by weight, and not less than 10% by weight of a styrene-butadiene rubber (2) containing a styrene amount of not more than 15% by weight and a vinyl amount of not more than 60% by weight, wherein a total amount of the styrene-butadiene rubber (1) and the styrene-butadiene rubber (2) is not less than 60% by weight.

Abstract: A rubber composition favorably used for a reinforcing layer of a run flat tire, which have both low exothermic property and high strength. A rubber composition for a tire, comprising 10 to 100 parts by weight of carbon black having a nitrogen adsorbing-specific area of 30 to 100 m2/g and a dibutyl phthalate oil absorption amount of at least 50 ml/100 g and at least 2 parts by weight of sulfur or a sulfur compound based on 100 parts by weight of a rubber component containing 10 to 70% by weight of a butadiene rubber obtained by copolymerizing a compound represented by the formula (1): (wherein R1 represents an amino group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group, a mercapto group or derivatives thereof).

Abstract: The present invention provides a rubber composition capable of reducing rolling resistance, and improving abrasion resistance, wet skid performance, and steering stability. A tire having a tread and/or a sidewall using the rubber composition is also provided. The rubber composition of the present invention comprises not less than 10 parts by weight of the silica (1) having an average primary particle diameter of not less than 22 nm and not less than 5 parts by weight of the silica (2) having an average primary particle diameter smaller than 22 nm based on 100 parts by weight of a rubber component, wherein the total amount of the silica (1) and the silica (2) is 15 to 150 parts by weight. The tire of the present invention is prepared by using the rubber composition.

Abstract: The object of the present invention is to provide a rubber composition for base tread enhancing a low fuel consumption property of a vehicle. A rubber composition for base tread comprises a rubber composition containing 15 to 80% by weight of a butadiene rubber obtained by copolymerizing a compound represented by the formula 1, wherein R1 represents an amino group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group, a mercapto group or a derivative thereof.

Abstract: An earth-friendly tire using raw materials derived from non-petroleum resources instead of all or part of raw materials derived from petroleum resources currently used for tires. The tire is prepared by using a natural rubber instead of a synthetic rubber; an inorganic filler and/or a biofiller instead of carbon black; vegetable oil instead of petroleum oil; and natural fiber instead of synthetic fiber so that the tire has a non-petroleum raw material in an amount of at least 75 % by weight based on the total weight of the tire.

Abstract: An earth-friendly tire using raw materials derived from non-petroleum resources instead of all or part of raw materials derived from petroleum resources currently used for tires. The tire is prepared by using a natural rubber instead of a synthetic rubber; an inorganic filler and/or a biofiller instead of carbon black; vegetable oil instead of petroleum oil; and natural fiber instead of synthetic fiber so that the tire comprises a non-petroleum raw material in an amount of at least 75% by weight based on the total weight of the tire.