Patents by Inventor Hideki Kitano
Hideki Kitano 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: 10183432Abstract: Provided is an inner liner for a pneumatic tire including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a resin having gas barrier properties, and a layer B that is adjacent to the layer A and is constituted with a resin composition containing an elastomer, an extensional viscosity ?A of the resin composition of the layer A, and an extensional viscosity ?B of the resin composition of the layer B as determined at a predetermined temperature both being no less than 1,000 Pa·s, and an extensional viscosity ratio ?A/?B being no less than 0.2 and no greater than 10.Type: GrantFiled: May 29, 2012Date of Patent: January 22, 2019Assignees: Kuraray Co., Ltd., BRIDGESTONE CORPORATIONInventors: Nahoto Hayashi, Masao Hikasa, Yusuke Tanaka, Hideki Kitano, Takatsugu Tanaka, Tetsuo Amamoto
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Patent number: 10076932Abstract: A multilayered structure having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B being adjacent to the layer A and being constituted with a resin composition containing an elastomer. The total number of the layer A and the layer B is at least 7. The average thickness of the layer A in terms of a single layer is no less than 0.001 ?m and no greater than 10 ?m, and the average thickness of the layer B in terms of a single layer is no less than 0.001 ?m and no greater than 40 ?m. The multilayered structure is formed by irradiating with an active energy ray. Furthermore, an inner liner having the multilayered structure, and a pneumatic tire provided with the inner liner are provided.Type: GrantFiled: November 30, 2010Date of Patent: September 18, 2018Assignees: Kuraray Co., Ltd., BRIDGESTONE CORPORATIONInventors: Yuwa Takahashi, Shinji Tai, Masao Hikasa, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
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Patent number: 9873238Abstract: Disclosed is an inner liner for a pneumatic tire, the inner liner including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing an elastomer, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 500 g/15 mm. The layer A and the layer B are preferably alternately laminated.Type: GrantFiled: November 30, 2010Date of Patent: January 23, 2018Assignees: KURARAY CO., LTD., Bridgestone CorporationInventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Yuwa Takahashi, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
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Patent number: 9868267Abstract: To provide a multilayer structure having high gas barrier property and crack resistance as well as excellent fatigue resistance, an inner liner for a pneumatic tire using such a multilayer structure, and a pneumatic tire comprising the inner liner. According to the present invention, in a multilayer structure 1 including a barrier layer 2 and an elastomer layer 3, a proportion of a thickness of the elastomer layer 3 in the multilayer structure ((U1+U2+ . . . +Un)/T) is 60% or more.Type: GrantFiled: May 31, 2012Date of Patent: January 16, 2018Assignees: BRIDGESTONE CORPORATION, Kuraray Co., Ltd.Inventors: Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka, Nahoto Hayashi, Masao Hikasa, Yusuke Tanaka
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Patent number: 9815330Abstract: The laminate according to the present invention includes a thermoplastic resin film-containing layer and a rubber layer, in which the rubber layer contains a modified diene polymer, and the rubber layer has a dynamic storage modulus E? at ?20° C. of 1.0×105 to 1.0×108 Pa. This laminate can improve the resistance to the fractures and the cracks of the inner liner.Type: GrantFiled: May 30, 2012Date of Patent: November 14, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Takuya Ogasawara, Hideyuki Chiashi, Hideki Kitano
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Patent number: 9724968Abstract: To provide a multilayer structure that may adhere to rubber material without the necessity of providing an adhesive layer, an inner liner and a pneumatic tire using the multilayer structure. According to the present invention, a multilayer structure 1 is formed by alternately laminating elastomer layers 3 containing thermoplastic elastomer and barrier layers 2 containing a gas barrier resin, wherein an outermost layer 4 laminated uppermost among layers constituting the multilayer structure 1 contains an elastomer component that may heat-adhere to diene rubber.Type: GrantFiled: May 29, 2012Date of Patent: August 8, 2017Assignees: BRIDGESTONE CORPORATION, Kuraray Co., Ltd.Inventors: Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka, Yuwa Takahashi, Nahoto Hayashi, Masao Hikasa, Yusuke Tanaka
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Patent number: 9718311Abstract: A pneumatic tire includes: an inner liner having a thermoplastic resin film, a carcass, and an adhesive layer disposed between the inner liner and the carcass, in which the dynamic storage modulus E's at ?20° C. of the thermoplastic resin film, the adhesive layer, and the carcass are defined as E1?, E2?, and E3?, respectively, and the relationship among E1?, E2?, and E3? satisfies E1?>E2?>E3?. This pneumatic tire has excellent anti-crack property in a low-temperature environment of the inner liner.Type: GrantFiled: May 28, 2012Date of Patent: August 1, 2017Assignee: BRIDGESTONE CORPORATIONInventors: Takuya Ogasawara, Hideyuki Chiashi, Hideki Kitano
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Patent number: 9631056Abstract: A method is provided for synthesizing a core-shell nanoparticle that includes the following steps: providing a polymeric seed (in a solvent) that includes mono-vinyl monomer cross-liniked with a cross-linking agent to form the core of the nanoparticle, the core has an average diameter of from about nanometers to about 10,000 nanometers, and the core has polymer chains with living ends; adding a stabilizer to stabilize the seed and prevent the seed from precipitating out of solution; and grafting a shell species onto the living ends of the core to form the shell of the nanoparticle. A core-first synthesized nanoparticle, along with a rubber composition and tire product are also provided.Type: GrantFiled: September 29, 2014Date of Patent: April 25, 2017Assignee: Bridgestone CorporationInventors: Yaohong Chen, Mindaugas Rackaitis, Xiaorong Wang, Hideki Kitano
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Patent number: 9493601Abstract: Compositions and methods are included for preparing a hairy polymeric nanoparticle including first and second shell block polymer arms are at least partially phase-separated and surround a polymeric core. One type of polymeric arm can have a greater polarity than the other type(s) of polymeric arms. A rubber composition including the hairy nanoparticles is also provided.Type: GrantFiled: June 22, 2015Date of Patent: November 15, 2016Assignee: Bridgestone CorporationInventors: Xiaorong Wang, Hideki Kitano, James Herman Pawlow, Christopher G. Robertson, Yaohong Chen, Yuan-Yong Yan
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Patent number: 9266978Abstract: Disclosed is a method of manufacturing a copolymer of a conjugated diene compound and an olefin other than the conjugated diene compound, where a conjugated diene compound and an olefin other than the conjugated diene compound is copolymerized in the presence of a polymerization catalyst composition containing components: (A) a rare earth element compound or a reactant of the rare earth element compound and a Lewis base; and (B) at least one selected from a group consisting of an ionic compound (B-1) composed of a non-coordinating anion and a cation, an aluminoxane (B-2), and at least one kind of halogen compound (B-3) selected from among a Lewis acid, a complex compound of a metal halide and a Lewis base, and an organic compound containing active halogen (when containing at least one of (B-1) and (B-3), the polymerization catalyst composition further contains component (C): an organometallic compound).Type: GrantFiled: July 22, 2011Date of Patent: February 23, 2016Assignee: BRIDGESTONE CORPORATIONInventors: Shojiro Kaita, Olivier Tardif, Hideki Kitano
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Publication number: 20160039964Abstract: A method is provided for making nanoparticles, including the steps of: combining a hydrocarbon solvent and an aprotic, polar co-solvent, a mono-vinyl aromatic monomer, polymerization initiator, a solution stabilizer, and a first charge of a cross-linking agent. Subsequently, a second charge of cross-linking agent is added. The nanoparticles have an average diameter of 5 nanometers to about 10,000 nanometers. Spherical nanoparticles are also provided that include a cross-linking agent comprising 30% to 60% by weight of the combined weight of a mono-vinyl aromatic species and the cross-linking agent. The spherical nanoparticles also meet the following equation: 0.90?(D1/D2)?1.1 wherein D1 is a first diameter of a nanoparticle and D2 is a second diameter of the nanoparticle, and D1 and D2 intersect at right angles.Type: ApplicationFiled: August 10, 2015Publication date: February 11, 2016Inventors: Hideki Kitano, Yaohong Chen
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Publication number: 20150291719Abstract: Compositions and methods are included for preparing a hairy polymeric nanoparticle including first and second shell block polymer arms are at least partially phase-separated and surround a polymeric core. One type of polymeric arm can have a greater polarity than the other type(s) of polymeric arms. A rubber composition including the hairy nanoparticles is also provided.Type: ApplicationFiled: June 22, 2015Publication date: October 15, 2015Inventors: Xiaorong Wang, Hideki Kitano, James Herman Pawlow, Christopher G. Robertson, Yaohong Chen, Yuan-Yong Yan
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Patent number: 9115222Abstract: A method is provided for making nanoparticles, including the steps of: combining a hydrocarbon solvent and an aprotic, polar co-solvent, a mono-vinyl aromatic monomer, polymerization initiator, a solution stabilizer, and a first charge of a cross-linking agent. Subsequently, a second charge of cross-linking agent is added. The nanoparticles have an average diameter of 5 nanometers to about 10,000 nanometers. Spherical nanoparticles are also provided that include a cross-linking agent comprising 30% to 60% by weight of the combined weight of a mono-vinyl aromatic species and the cross-linking agent. The spherical nanoparticles also meet the following equation: 0.90?(D1/D2)?1.1 wherein D1 is a first diameter of a nanoparticle and D2 is a second diameter of the nanoparticle, and D1 and D2 intersect at right angles.Type: GrantFiled: December 28, 2010Date of Patent: August 25, 2015Assignee: Bridgestone CorporationInventors: Hideki Kitano, Yaohong Chen
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Patent number: 9074035Abstract: In a copolymer of a conjugated diene compound and a non-conjugated olefin, the conjugated diene unit has a cis-1,4 bond content of greater than 70.5% and the non-conjugated olefin is contained in an amount of 10 mol % or more.Type: GrantFiled: July 26, 2011Date of Patent: July 7, 2015Assignee: BRIDGESTONE CORPORATIONInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
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Publication number: 20150183270Abstract: Provided is a laminate for inner liner which uses a resin film in which adhesiveness between an adjacent member such as a carcass and a resin film can be sufficiently secured and a tire using the same. The laminate is a laminate for inner liner including: a gas barrier layer 1 comprising a resin material which is composed of a thermoplastic resin or a mixture of a thermoplastic resin and a thermoplastic elastomer; and rubber layers 2A, 2B each arranged on each of both sides of the gas barrier layer. The rubber layer contains at least a diene elastomer, the diene elastomer is modified by a compound including a functional group having an affinity for the resin material, and at least one of the rubber layers contains a cross-linking agent.Type: ApplicationFiled: July 23, 2013Publication date: July 2, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hideki Kitano, Hideyuki Chiashi
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Patent number: 9062144Abstract: Compositions and methods are included for preparing a hairy polymeric nanoparticle including first and second shell block polymer arms are at least partially phase-separated and surround a polymeric core. One type of polymeric arm can have a greater polarity than the other type(s) of polymeric arms. A rubber composition including the hairy nanoparticles is also provided.Type: GrantFiled: April 5, 2010Date of Patent: June 23, 2015Assignee: Bridgestone CorporationInventors: Xiaorong Wang, Hideki Kitano, James H. Pawlow, Christopher G. Robertson, Yaohong Chen, Yuan-Yong Yan
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Publication number: 20150125685Abstract: The present invention provides a rubber sheet having a thickness of 500 ?m or less, wherein a rubber component in a rubber composition to constitute the rubber sheet contains a liquid elastomer having a weight-average molecular weight of from 500 to 100000, and a method for producing a rubber sheet having a thickness of 500 ?m or less, which includes a step (A) of forming a film of a rubber composition not containing an organic compound having a boiling point not higher than 150° C., on a substrate sheet at a temperature at which the viscosity of the rubber composition falls within a range of from 10 to 100000 mPa·s. Using the specific liquid elastomer, the present invention provides a rubber sheet having a thickness of 500 ?m or less. Not using any special coating apparatus, the present invention provides a method for producing a rubber sheet of a rubber composition not containing an organic compound having a boiling point not higher than 150° C.Type: ApplicationFiled: May 2, 2013Publication date: May 7, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Hideki Kitano, Hideyuki Chiashi, Tetsuo Amamoto
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Patent number: 8962743Abstract: The present invention provides a copolymer of a conjugated diene compound and a non-conjugated olefin, in which the conjugated diene unit has cis-1,4 bonds and the non-conjugated olefin contains many ethylene structures. In a copolymer of a conjugated diene compound and an unconjugated olefin other than the conjugated diene compound, the conjugated diene unit has a cis-1,4 bond content of 50% or more and the unconjugated olefin is contained in an amount of 20 mol % or more.Type: GrantFiled: July 27, 2011Date of Patent: February 24, 2015Assignee: Bridgestone CorporationInventors: Shojiro Kaita, Olivier Tardif, Yasuo Horikawa, Hideki Kitano
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Publication number: 20150017446Abstract: A method is provided for synthesizing a core-shell nanoparticle that includes the following steps: providing a polymeric seed (in a solvent) that includes mono-vinyl monomer cross-liniked with a cross-linking agent to form the core of the nanoparticle, the core has an average diameter of from about nanometers to about 10,000 nanometers, and the core has polymer chains with living ends; adding a stabilizer to stabilize the seed and prevent the seed from precipitating out of solution; and grafting a shell species onto the living ends of the core to form the shell of the nanoparticle. A core-first synthesized nanoparticle, along with a rubber composition and tire product are also provided.Type: ApplicationFiled: September 29, 2014Publication date: January 15, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Yaohong Chen, Mindaugas Rackaitis, Xiaorong Wang, Hideki Kitano
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Patent number: 8916335Abstract: A photo-curable transfer sheet having a photo-curable transfer layer comprising a photo-curable composition, the photo-curable composition being deformable by application of pressure and containing a reactive polymer having a photopolymerizable functional group, wherein the photo-curable transfer layer shows linearity in relationship between strain [?] (%) and time [t] (second) measured by a creep test using a dynamic viscoelasticity measuring apparatus under the conditions of an ordinary temperature, stress of 50 Pa and a time period of 120 seconds, and satisfies a following formula: log ?=a+b·log t, in which “a” is a real number, and “b” is in the range of 0.10 to 0.53; and a process for the preparation of an optical information recording medium using the sheet and an optical information recording medium.Type: GrantFiled: October 6, 2004Date of Patent: December 23, 2014Assignee: Bridgestone CorporationInventors: Hideki Kitano, Takato Inamiya, Kenji Murayama, Hidefumi Kotsubo, Yasuhiro Morimura