Patents by Inventor Soh Ishino
Soh Ishino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9249284Abstract: Provided are a rubber composition for tires which provides both adhesion to fiber cords and conductivity even when an inexpensive conductive carbon black is used, and thus achieves a balanced improvement in conductivity, handling stability, fuel economy, elongation at break, adhesion to fiber cords, processability, and tire durability; and a pneumatic tire including the composition. The composition includes, per 100 parts by mass of a rubber component: 1.0-3.5 parts by mass of sulfur with an iron content of 30 ppm or less, calculated as the net sulfur content in the sulfur; and 0.5-15 parts by mass of conductive carbon black having a DBP of 300 ml/100 g or more and an iron content of 60 ppm or more, the composition having a total net sulfur content of 1.0-6.0 parts by mass per 100 parts by mass of the rubber component, and a volume resistivity of 1.0×108 ?·cm or less.Type: GrantFiled: March 31, 2014Date of Patent: February 2, 2016Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya Miyazaki, Soh Ishino
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Publication number: 20150329716Abstract: The present invention provides a studless winter tire including a tread (a cap tread in the case of a multi-layered tread) which exhibits a reduced increase in hardness at low temperatures and achieves a balanced improvement in both performance on ice and snow and abrasion resistance. The present invention also provides a studless winter tire including a base tread which exhibits a reduced increase in hardness at low temperatures and achieves a balanced improvement in both performance on ice and snow and durability. The studless winter tires include a tread or base tread formed from a rubber composition that contains predetermined amounts of silica and a rubber component including natural rubber and a specific modified conjugated diene polymer.Type: ApplicationFiled: April 17, 2015Publication date: November 19, 2015Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryoji KOJIMA, Mikako TAKENAKA, Soh ISHINO
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Patent number: 9169375Abstract: The present invention provides a rubber composition for a tread, having improved abrasion resistance, heat aging resistance, processability, and fuel economy in a balanced manner, and a pneumatic tire formed therefrom. The present invention relates to a rubber composition for a tread, comprising a rubber component, silica, a silane coupling agent, a sulfur vulcanizing agent, a sulfenamide or thiazole vulcanization accelerator 1, and a thiuram vulcanization accelerator 2.Type: GrantFiled: October 9, 2013Date of Patent: October 27, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Soh Ishino
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Patent number: 9129726Abstract: Provided are a rubber composition for a tire which achieves a balanced improvement in tensile properties at break and fuel economy while providing excellent conductivity; and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition for a tire, including: a rubber component; a carbon black having a nitrogen adsorption specific surface area of 20 to 110 m2/g and a DBP oil absorption of 60 to 130 ml/100 g; and a conductive carbon black having a nitrogen adsorption specific surface area of 900 m2/g or larger, a DBP oil absorption of 300 ml/100 g or more, and a volatile content of 0.8% by mass or more, the rubber composition containing 0.1 to 3 parts by mass of the conductive carbon black per 100 parts by mass of the rubber component.Type: GrantFiled: May 1, 2014Date of Patent: September 8, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryota Kitago, Soh Ishino, Ayuko Yamana
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Patent number: 9120890Abstract: Provided are a rubber composition achieving balanced improvement in processability, fuel economy, rubber strength, abrasion resistance, and wet-grip performance, and a pneumatic tire thereof. The rubber composition includes a conjugated diene polymer and a silica having N2SA of 40-400 m2/g, the polymer being obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound in the presence of a polymerization initiator of formula (I): to produce a copolymer, and reacting a compound containing nitrogen and/or silicon atoms with an active terminal of the copolymer, wherein the amount of the diene polymer is 1-60% by mass and the amount of polyisoprene-based rubber is 0-99% by mass, each per 100% by mass of the rubber component; the amount of the silica is 10-80 parts by mass per 100 parts by mass of the rubber component; and the composition has a carbon ratio of at least 50.Type: GrantFiled: June 26, 2012Date of Patent: September 1, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Soh Ishino, Kazuya Torita
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Patent number: 9102816Abstract: Provided are: a tire rubber composition improving fuel economy and abrasion resistance while maintaining good wet-grip performance or improving it; and a pneumatic tire including the same.Type: GrantFiled: October 5, 2012Date of Patent: August 11, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Soh Ishino
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Publication number: 20150210118Abstract: Provided are rubber composition for a fiber ply cord topping, a fiber ply cord topping rubber, a pneumatic tire formed therefrom, and a method for manufacturing the rubber composition for a fiber ply cord topping, which make it possible to provide good conductivity to even fuel efficient and lightweight pneumatic tires. The rubber composition for a fiber ply cord topping includes a rubber component including an isoprene-based rubber and styrene butadiene rubber, and a conductive carbon black having a dibutyl phthalate oil absorption of 300 ml/100 g or more, wherein an amount of the isoprene-based rubber is 20 to 80% by mass and an amount of the styrene butadiene rubber is 20 to 60% by mass, each based on 100% by mass of the rubber component, and an amount of the conductive carbon black is 1 to 10 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: December 31, 2014Publication date: July 30, 2015Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya MIYAZAKI, Soh ISHINO, Ayuko YAMANA
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Patent number: 9018289Abstract: It is an object of the present invention to provide: a rubber composition for a tread, which improves processability, rolling resistance, wet skid performance, abrasion resistance, and handling stability in good balance; and a pneumatic tire having a tread produced from the rubber composition. The present invention relates to a rubber composition for a tread, including: a rubber component; an aromatic vinyl polymer; silica; and a mercapto group-containing silane coupling agent, wherein the aromatic vinyl polymer is a resin obtained by polymerization of ?-methylstyrene and/or styrene, and the amount of the aromatic vinyl polymer is 3 to 25 parts by mass, and the amount of the silica is 15 to 150 parts by mass, based on 100 parts by mass of the rubber component.Type: GrantFiled: December 23, 2010Date of Patent: April 28, 2015Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Soh Ishino
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Publication number: 20140326928Abstract: Provided are a rubber composition for a tire which achieves a balanced improvement in tensile properties at break and fuel economy while providing excellent conductivity; and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition for a tire, including: a rubber component; a carbon black having a nitrogen adsorption specific surface area of 20 to 110 m2/g and a DBP oil absorption of 60 to 130 ml/100 g; and a conductive carbon black having a nitrogen adsorption specific surface area of 900 m2/g or larger, a DBP oil absorption of 300 ml/100 g or more, and a volatile content of 0.8% by mass or more, the rubber composition containing 0.1 to 3 parts by mass of the conductive carbon black per 100 parts by mass of the rubber component.Type: ApplicationFiled: May 1, 2014Publication date: November 6, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryota KITAGO, Soh ISHINO, Ayuko YAMANA
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Publication number: 20140296413Abstract: Provided are a rubber composition for tires which provides both adhesion to fiber cords and conductivity even when an inexpensive conductive carbon black is used, and thus achieves a balanced improvement in conductivity, handling stability, fuel economy, elongation at break, adhesion to fiber cords, processability, and tire durability; and a pneumatic tire including the composition. The composition includes, per 100 parts by mass of a rubber component: 1.0-3.5 parts by mass of sulfur with an iron content of 30 ppm or less, calculated as the net sulfur content in the sulfur; and 0.5-15 parts by mass of conductive carbon black having a DBP of 300 ml/100 g or more and an iron content of 60 ppm or more, the composition having a total net sulfur content of 1.0-6.0 parts by mass per 100 parts by mass of the rubber component, and a volume resistivity of 1.0×108 ?·cm or less.Type: ApplicationFiled: March 31, 2014Publication date: October 2, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya MIYAZAKI, Soh ISHINO
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Publication number: 20140296376Abstract: Provided are: a rubber composition a achieving balanced improvement in processability, fuel economy, rubber strength, abrasion resistance, wet-grip performance, and handling stability, and a pneumatic tire including the composition. Included is a rubber composition including a conjugated diene polymer and a silica having N2SA of 40-400 m2/g, the diene polymer being obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound in the presence of a polymerization initiator of formula (I): to produce, a copolymer, and reacting a compound containing nitrogen and/or silicon atoms with an active terminal of the copolymer, wherein the amount of the diene polymer is 1-90% by mass and the amount of a polyisoprene-based rubber is 0-70% by mass, each per 100% by mass of the rubber component, and the amount of the silica is 10-150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: June 26, 2012Publication date: October 2, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Daisuke Sato, Kazuya Torita, Soh Ishino
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Publication number: 20140275430Abstract: Provided are a rubber composition achieving balanced improvement in processability, fuel economy, rubber strength, abrasion resistance, and wet-grip performance, and a pneumatic tire thereof. The rubber composition includes a conjugated diene polymer and a silica having N2SA of 40-400 m2/g, the polymer being obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound in the presence of a polymerization initiator of formula (I): to produce a copolymer, and reacting a compound containing nitrogen and/or silicon atoms with an active terminal of the copolymer, wherein the amount of the diene polymer is 1-60% by mass and the amount of polyisoprene-based rubber is 0-99% by mass, each per 100% by mass of the rubber component; the amount of the silica is 10-80 parts by mass per 100 parts by mass of the rubber component; and the composition has a carbon ratio of at least 50.Type: ApplicationFiled: June 26, 2012Publication date: September 18, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Soh Ishino, Kazuya Torita
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Publication number: 20140256847Abstract: Provided are a rubber composition achieving balanced improvement in processability, fuel economy, rubber strength, abrasion resistance, wet-grip performance, and handling stability, and a pneumatic tire including the composition. The rubber composition includes, per 100% by mass of a rubber component, at least 35% by mass of SR, the composition including a conjugated diene polymer and a silica having N2SA of 40-400 m2/g, the polymer being obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound using a polymerization initiator of formula (I): to produce a copolymer, and reacting a compound containing nitrogen and/or silicon atoms with an active terminal of the copolymer, wherein the amount of the diene polymer is 1-90% by mass and the amount of polyisoprene-based rubber is 0-40% by mass, each per 100% by mass of the rubber component, and the amount of the silica is 10-150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: June 26, 2012Publication date: September 11, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Daisuke Sato, Kazuya Torita, Soh Ishino
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Publication number: 20140213707Abstract: The present invention provides a rubber composition for a tire having improved abrasion resistance, fuel economy and processability in a balanced manner. The present invention also provides a method for producing the rubber composition, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for a tire obtained by mixing a kneaded mixture containing butadiene rubber 1, silica 1, a silane coupling agent 1 with a sulfur content of 20% by mass or more, and oil 1; styrene-butadiene rubber 2; and a silane coupling agent 2 with a sulfur content of less than 20% by mass.Type: ApplicationFiled: January 13, 2014Publication date: July 31, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Soh ISHINO
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Publication number: 20140213713Abstract: Provided are: a tire rubber composition improving fuel economy and abrasion resistance while maintaining good wet-grip performance or improving it; and a pneumatic tire including the same.Type: ApplicationFiled: October 5, 2012Publication date: July 31, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Soh Ishino
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Publication number: 20140194552Abstract: Provided are: a rubber composition for tires capable of improving fuel economy, wet grip performance, and abrasion resistance; and a pneumatic tire including the same. Included is a rubber composition for tires including: a diene polymer; silica; and a liquid resin having a softening point of ?20 to 20° C., the diene polymer being a modified diene polymer obtained by reacting components (A) and (B), the liquid resin being present in an amount of 3-40 parts by mass per 100 parts by mass of the rubber component, the component (A) being an active alkali metal-terminated conjugated diene polymer obtained by polymerizing a conjugated diene monomer alone or with an aromatic vinyl monomer, in the presence of a component (C) the component (B) being a modifier containing a functional group, the component (C) being a chemical species obtained by reacting an organic alkali metal compound and a compound of Formula (1) below.Type: ApplicationFiled: October 16, 2012Publication date: July 10, 2014Inventor: Soh Ishino
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Publication number: 20140155539Abstract: The invention provides a rubber composition for tires, enabling a balanced improvement of processability, rubber strength, fuel economy, and crack growth resistance; and a pneumatic tire formed from the rubber composition. The invention relates to a rubber composition for tires, including: a butadiene rubber (a) having a cis content of 96% by mass or more, a Mooney viscosity of 35 to 75, and a ratio of (Weight average molecular weight (Mw))/(Number average molecular weight (Mn)) of 2.7 or less; and a butadiene rubber (b) containing 1,2-syndiotactic polybutadiene crystals with a melting point of 90 to 140° C., and having a weight average molecular weight of 50,000 to 500,000.Type: ApplicationFiled: November 18, 2013Publication date: June 5, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Soh ISHINO
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Publication number: 20140100317Abstract: The present invention provides a rubber composition for a tread, having improved abrasion resistance, heat aging resistance, processability, and fuel economy in a balanced manner, and a pneumatic tire formed therefrom. The present invention relates to a rubber composition for a tread, comprising a rubber component, silica, a silane coupling agent, a sulfur vulcanizing agent, a sulfenamide or thiazole vulcanization accelerator 1, and a thiuram vulcanization accelerator 2.Type: ApplicationFiled: October 9, 2013Publication date: April 10, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventor: Soh ISHINO
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Publication number: 20110160337Abstract: It is an object of the present invention to provide: a rubber composition for a tread, which improves processability, rolling resistance, wet skid performance, abrasion resistance, and handling stability in good balance; and a pneumatic tire having a tread produced from the rubber composition. The present invention relates to a rubber composition for a tread, including: a rubber component; an aromatic vinyl polymer; silica; and a mercapto group-containing silane coupling agent, wherein the aromatic vinyl polymer is a resin obtained by polymerization of ?-methylstyrene and/or styrene, and the amount of the aromatic vinyl polymer is 3 to 25 parts by mass, and the amount of the silica is 15 to 150 parts by mass, based on 100 parts by mass of the rubber component.Type: ApplicationFiled: December 23, 2010Publication date: June 30, 2011Inventor: Soh Ishino