Patent application number | Description | Published |
20080314495 | Rubber composition for side wall, as well as pneumatic tire - By a rubber composition for a side wall including a solid rubber component including a natural rubber component consisting of 30 to 70% mass of a natural rubber and 30 to 70% mass of a modified natural rubber, and 20 to 60 parts by mass of silica, and 3 to 60 parts by mass of a liquid rubber based on 100 parts by mass of the solid rubber component, as well as a pneumatic tire using the rubber composition, a rubber composition for a side wall in which properties desired in a rubber composition for a side wall such as heat resistance, flexing resistance and fatigue resistance are improved while a use amount of a raw material derived from a petroleum source is reduced, as well as a pneumatic tire using the rubber composition are provided. | 12-25-2008 |
20090000721 | Rubber composition for side walls, method of producing the same, and pneumatic tire - There are provided a rubber composition for side walls containing 100 parts by mass of a first rubber component consisting of 30 to 70 mass % of natural rubber and 70 to 30 mass % of epoxidized natural rubber, 20 to 60 parts by mass of silica, and 3 to 60 parts by mass of a second rubber component consisting of liquid rubber, as well as a method of producing the same and a pneumatic tire provided with a side wall rubber consisting of the rubber composition. The rubber composition for side walls has a higher content of source materials deriving from non-petroleum resources, and has excellent durability and an anti-crack-growing property. | 01-01-2009 |
20100132866 | RUBBER COMPOSITION FOR SIDEWALL REINFORCING LAYER OR SIDEWALL, AND TIRE - The present invention aims to provide a rubber composition for a sidewall reinforcing layer or a sidewall, which has sufficient thermal conductivity and low heat build-up property as well as excellent rigidity and run-flat durability. The present invention also aims to provide a pneumatic tire such as a run-flat tire, which has a sidewall reinforcing layer or sidewall that is produced using the rubber composition. | 06-03-2010 |
20120267024 | RUBBER COMPOSITION FOR SIDEWALL REINFORCING LAYER AND RUN-FLAT TIRE - Provided are a rubber composition for a sidewall reinforcing layer and a run-flat tire that reduce heat build-up, enhance elongation at break at high temperature, and increase run-flat durability, while maintaining good rigidity. The composition contains a rubber component including tin-modified BR (a) and/or BR (b) modified by a compound of formula (1); and an alkylphenol-sulfur chloride condensate, wherein an amount of the alkylphenol-sulfur chloride condensate is 3-10 parts by mass per 100 parts by mass of the rubber component: | 10-25-2012 |
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 |
20130310512 | RUBBER COMPOSITION AND PNEUMATIC TIRE - The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and also provides a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component. | 11-21-2013 |
20140011939 | RUBBER COMPOSITION AND PNEUMATIC TIRE - The present invention provides a rubber composition capable of enhancing the fuel economy, wet-grip performance, abrasion resistance, handling stability, and processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by a specific silicon atom-terminated unsaturated compound, at least one terminal of the polymer being modified with at least one selected from specific compounds; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component, | 01-09-2014 |
20140018490 | RUBBER COMPOSITION AND PNEUMATIC TIRE - The invention provides a rubber composition that can enhance fuel economy, wet-grip performance, abrasion resistance, and handling stability in a balanced manner, and a pneumatic tire using this composition. The invention relates to a rubber composition containing a rubber component, silica ( | 01-16-2014 |
20140190619 | STRIP, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR MANUFACTURING PNEUMATIC TIRE - The present invention is a strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire. The strip is composed of a layer stack of a first layer made of a thermoplastic elastomer composition containing 0.1 part by mass to 50 parts by mass of an organic derivative of clay mineral relative to 100 parts by mass of a styrene-isobutylene-styrene triblock copolymer, and a second layer made of a thermoplastic elastomer composition containing at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer. The strip has a strip main body with a thickness of 0.05 mm to 1.0 mm and ear portions with a thickness thinner than the thickness of the strip main body and a width of 0.5 mm to 5.0 mm disposed on opposite sides thereof. | 07-10-2014 |
20140261976 | METHOD FOR MANUFACTURING PNEUMATIC TIRE - In a method for manufacturing a pneumatic tire, molding of a green tire has an assembly step of bonding an inner liner and an unvulcanized rubber sheet with end portions thereof in a width direction being displaced from each other by 50 mm to 500 mm in the width direction to manufacture a laminate, cutting the laminate to have a constant length corresponding to a width of a drum to manufacture a cut sheet, and a joining step of winding the cut sheet on entire circumference of the drum such that a cut surface thereof extends in a circumferential direction of the drum and the inner liner is disposed on an inner surface side, and joining the end portions of the inner liner and joining the end portions of the unvulcanized rubber sheet such that positions of the joined end portions are displaced by a constant distance. | 09-18-2014 |