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.

Abstract: There is provided a rubber compound for reinforcing a side portion of a tire and a run flat tire that can maintain satisfactory tensile elongation at break and also provide better run-flat performance. The rubber compound for reinforcing a side portion of a tire contains at least one of natural rubber and isoprene rubber in an amount of 20-80 parts by weight and syndiotactic crystal-containing butadiene rubber in an amount of 80-20 parts by weight to provide 100 parts by weight of a rubber compound, with silica blended therein in an amount of 5-50 parts by weight, the silica having a pH value of 7.0-12.0 in a 5% aqueous solution.

Abstract: A rubber composition in which rolling resistance can be reduced without lowering wet grip performance, and a tire using the same can be provided. A rubber composition comprising 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 a rubber component comprising not less than 15% by weight of a styrene-butadiene rubber (1) containing an 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 for a tire having improved in low fuel efficiency, wet skid performance, abrasion resistance, and steering stability with favorable balance, and tire which has tread, using the same. A rubber composition for a tire, comprising 30 to 150 parts by weight of silica having a nitrogen adsorbing-specific surface area of 20 to 200 m2/g, and a pH of 7.0 to 12.0 when the silica is dispersed in water to be 5% aqueous solution, based on 100 parts by weight of a rubber component, and a tire which has a tread, using the same.

Abstract: A side-reinforcing rubber composition for a run flat tire, which achieves both low heat generating properties and high strength and improves run flat durability, and a run flat tire which uses such a rubber composition, said composition containing 10 to 100 parts by weight of carbon black having nitrogen-adsorbing specific surface area of 30 to 100 m2/g and dibutyl phthalate oil absorption of at least 50 ml/100 g, 5 to 120 parts by weight of a laminated natural mineral having an aspect ratio of 3 to 30 and average particle size of 2 to 30 ?m, and at least 2 parts by weight of sulfur or a sulfur compound, based on 100 parts by weight of a diene rubber component.

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: 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/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 present invention provides a rubber composition for a tire, which achieves both low heat generating properties and high strength and improves durability of a run flat tire, and a run flat tire obtained using the rubber composition. Specifically, the present invention provides a rubber composition for a tire comprising 10 to 100 parts by weight of carbon black having nitrogen-adsorbing specific surface area of 30 to 100 m2/g and dibutyl phthalate oil absorption of at least 50 ml/100 g, and at least 2 parts by weight of a vulcanizing agent, based on 100 parts by weight of a rubber component containing 10 to 50% by weight of star-shaped solution polymerization butadiene rubber, and a run flat tire using the composition as the reinforcing rubber layer of the sidewall.

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: There is provided a run flat tire having a side reinforcing layer or a bead apex in which low exothermic property and high hardness are compatible and durability is improved. A run flat tire having a side reinforcing layer or a bead apex comprising a rubber composition containing 1 to 20 parts by weight of a C5-based petroleum resin having a number average molecular weight of 300 to 10000 which is obtained by polymerizing C5-based petroleum hydrocarbon and 5 to 120 parts by weight of lamellar natural ore based on 100 parts by weight of a rubber component.

Abstract: There is provided a rubber composition capable of producing a tire which improves rolling resistance performance, wet skid performance and drivability of a vehicle in good balance, and a tire having a tread comprising thereof. A rubber composition comprising 30 to 150 parts by weight of the total of (1) silica with a nitrogen adsorption specific area of 100 m2/g or less and (2) silica with a nitrogen adsorption specific area of 180 m2/g or more based on 100 parts by weight of a rubber component, wherein the content of silica (1) and silica (2) satisfies the following formula, and a tire having a tread comprising thereof: [Content of silica (1)]×0.2?[content of silica (2)]?[content of silica (1)]×6.5.

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 present invention provides a rubber composition for a run-flat tire which can have compatibility of low heat build-up with a high degree of hardness and improve durability of the run-flat tire, and the run-flat tire comprising the same. The present invention relates to a rubber composition for a run-flat tire containing 10 to 100 parts by weight of carbon black and at least 3 parts by weight of a compound satisfying the formula represented in the following: -—R—Sx)n— (wherein R is (CH2—CH2—O)m—CH2—CH2, x is an integer of 3 to 6, n is an integer of 10 to 400 and m is an integer of 2 to 5) based on 100 parts by weight of a rubber composition, and the run-flat tire having a reinforcing layer comprising the same.

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.

Abstract: The present invention provides a rubber composition for a bead, which has excellent processability and is capable of decreasing heat generation while maintaining rubber hardness, and a pneumatic tire having improved balance in fuel efficiency and steering stability. Specifically, the present invention provides a rubber composition for a tire bead comprising (B) 10 to 100 parts by weight of carbon black having nitrogen-adsorbing specific surface area of 30 to 100 m2/g and dibutyl phthalate adsorption of 40 to 200 ml/100 g, and (C) 5 to 120 parts by weight of a think plate-like natural mineral having aspect ratio of 3 to 30 and average particle size of 2 to 30 ?m, based on (A) 100 parts by weight of a rubber component.

Abstract: The present invention provides a rubber composition for a tire, which achieves both low heat generating properties and high strength and improves durability of a run flat tire, and a run flat tire obtained using the rubber composition. Specifically, the present invention provides a rubber composition for a tire comprising 10 to 100 parts by weight of carbon black having nitrogen-adsorbing specific surface area of 30 to 100 m2/g and dibutyl phthalate oil absorption of at least 50 ml/100 g, and at least 2 parts by weight of a vulcanizing agent, based on 100 parts by weight of a rubber component containing 10 to 50% by weight of star-shaped solution polymerization butadiene rubber, and a run flat tire using the composition as the reinforcing rubber layer of the sidewall.

Abstract: The present invention provides a rubber composition for a base tread, which improves balance in low heat generating properties and steering stability, and a pneumatic tire using the same. Specifically, the present invention provides a rubber composition for a base tread of a tire comprising 5 to 120 parts by weight of a laminated natural mineral having aspect ratio of 3 to 30 and average particle size of 2 to 30 ?m, based on 100 parts by weight of a diene rubber component, and a pneumatic tire having a base tread comprising the rubber composition.

Abstract: The present invention provides a side-reinforcing rubber composition for a run flat tire, which achieves both low heat generating properties and high strength and improves run flat durability, and a run flat tire using the rubber composition. Specifically, the present invention provides to a side-reinforcing rubber composition for a run flat tire comprising 10 to 100 parts by weight of carbon black having nitrogen-absorbing specific surface area of 30 to 100 m2/g and dibutyl phthalate oil absorption of at least 50 ml/100 g, 5 to 120 parts by weight of a laminated natural mineral having aspect ratio of 3 to 30 and average particle size of 2 to 30 ?m, and at least 2 parts by weight of sulfur or a sulfur compound, based on 100 parts by weight of a diene rubber component, and a run flat tire using the composition as a side-reinforcing rubber.

Abstract: A rubber composition for tire and a pneumatic tire in which the rubber composition is used improve steering performance on snowy and icy roads as well as traction performance in the forward and backward directions while reducing the recycling and manufacturing cost. The rubber composition for tire contains from 0.5 to 12 parts by weight of paper relative to 100 parts by weight of a rubber component, and preferably further contains from 5 to 100 parts by weight of silica and from 2 to 15 parts by weight of short fiber relative to 100 parts by weight of the rubber component. The paper is newspaper waste. From 10 to 100 parts by weight of carbon black may further be contained relative to 100 parts by weight of the rubber component.

Abstract: The present invention provides a rubber composition with superior balance in abrasion resistance, processability, rolling resistance, and wet skid performance, and a tire using this rubber composition for the tread. A rubber composition comprising at least one rubber selected from the group consisting of diene rubbers and natural rubber, and per 100 parts by weight of the rubber, 30 to 120 parts by weight of silica, and 5 to 40 parts by weight of zirconium silicate having an average particle diameter of at most 10 &mgr;m is used as a rubber composition for the tire tread. In addition, a tire tread is made from this rubber composition, and using this tread, a tire is manufactured.