Patents by Inventor Toshihiro UCHIYAMA
Toshihiro UCHIYAMA 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: 10087292Abstract: Provided is a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a monohydrazide compound (C) supported on a solid. The monohydrazide compound (C) is represented by general formula (I): R—CONHNH2, where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. The method comprises compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the monohydrazide compound (C) supported on the solid and kneading in the preliminary compounding stage and/or a first compounding stage. Also provided is a rubber composition produced with this method.Type: GrantFiled: September 11, 2015Date of Patent: October 2, 2018Assignee: BRIDGESTONE CORPORATIONInventors: Aya Saiki, Toshihiro Uchiyama
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Publication number: 20180244808Abstract: Provided is a method capable of efficiently producing a modified diene-based rubber, and a rubber composition and a tire with excellent low hysteresis loss property, durability, etc. The method for producing a modified diene-based rubber of this disclosure comprises: performing modification by adding a modifier into a solution of a diene-based rubber as raw material obtained by dissolving a diene-based rubber as raw material in a solvent, and removing the solvent and reacting the modifier with the diene-based rubber as raw material while exerting a mechanical shear force, to thereby generate a modified diene-based rubber. The rubber composition of this disclosure uses a modified diene-based rubber produced with the method for producing a modified diene-based rubber of this disclosure. The tire of this disclosure uses the rubber composition of this disclosure.Type: ApplicationFiled: August 1, 2016Publication date: August 30, 2018Applicant: BRIDGESTONE CORPORATIONInventors: Toshihiro UCHIYAMA, Hajime KONDO, Yoichi OZAWA
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Patent number: 10017593Abstract: A method for providing a polymer having terminal functionality involves reacting a terminally active polymer with an ?,?-ethylenically unsaturated compound that includes a group 2-13 element so as to provide a functionalized polymer. The resulting polymer exhibits enhanced interactivity with particulate fillers and can be used in the manufacture of vulcanizates.Type: GrantFiled: January 31, 2017Date of Patent: July 10, 2018Assignee: Bridgestone CorporationInventors: Zengquan Qin, Terrence E. Hogan, Toshihiro Uchiyama, Joshua P. Abell, Steven Luo
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Patent number: 9951208Abstract: Disclosed herein are rubber compositions comprising at least one conjugated diene polymer or copolymer, silica filler, and a silica shielding agent of formula (I), and related methods such as for improving silica dispersability in silica-filled rubber compositions. Also disclosed herein are tire components, such as tire treads containing the rubber compositions disclosed herein.Type: GrantFiled: November 5, 2015Date of Patent: April 24, 2018Assignee: Bridgestone CorporationInventors: Yaohong Chen, Arif O. Gozen, Toshihiro Uchiyama
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Publication number: 20170267818Abstract: Provided is a method for producing a rubber composition that includes a rubber component (A) including natural rubber, at least one filler (B) selected from an inorganic filler and carbon black, and a monohydrazide compound (C) supported on a solid. The monohydrazide compound (C) is represented by general formula (I): R—CONHNH2, where R represents an alkyl group having from 1 to 30 carbon atoms, a cycloalkyl group having from 3 to 30 carbon atoms, or an aryl group. The method comprises compounding in an optional preliminary compounding stage and a plurality of compounding stages, and adding the monohydrazide compound (C) supported on the solid and kneading in the preliminary compounding stage and/or a first compounding stage. Also provided is a rubber composition produced with this method.Type: ApplicationFiled: September 11, 2015Publication date: September 21, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Aya SAIKI, Toshihiro UCHIYAMA
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Publication number: 20170267798Abstract: A method for providing a polymer having terminal functionality involves reacting a terminally active polymer with an ?,?-ethylenically unsaturated compound that includes a group 2-13 element so as to provide a functionalized polymer. The resulting polymer exhibits enhanced interactivity with particulate fillers and can be used in the manufacture of vulcanizates.Type: ApplicationFiled: January 31, 2017Publication date: September 21, 2017Inventors: Zengquan Qin, Terrence E. Hogan, Toshihiro Uchiyama, Joshua P. Abell, Steven Luo
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Patent number: 9758639Abstract: Disclosed herein are vulcanizable and vulcanized rubber compositions comprising a conjugated diene polymer or copolymer, silica, and a substituted imidazole-based silica shielding agent of Formula (I), and methods for preparing such rubber compositions. Also disclosed herein are tire components, such as tire treads, containing the rubber compositions disclosed herein.Type: GrantFiled: April 30, 2015Date of Patent: September 12, 2017Assignee: Bridgestone CorporationInventors: Yaohong Chen, Arif Omer Gozen, Toshihiro Uchiyama
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Patent number: 9670341Abstract: The present disclosure provides reinforcing filler-containing rubber compositions suitable for use in tires, and particularly in tire treads. These rubber compositions comprise a metal carboxylate. The metal carboxylate provides improved processability to the rubber compositions in the form of a reduced Mooney viscosity. In certain exemplary embodiments, these rubber compositions containing the metal carboxylate also have an enhanced elastic modulus (also referred to as the G?). Further, in certain of the enhanced elastic modulus embodiments, the rubber compositions containing the metal carboxylate also have decreased hysteresis loss.Type: GrantFiled: November 4, 2013Date of Patent: June 6, 2017Assignee: Bridgestone CorporationInventors: Yaohong Chen, Toshihiro Uchiyama, Arif O. Gozen, Mindaugas Rackaitis
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Patent number: 9556297Abstract: A method for providing a polymer having terminal functionality involves reacting a terminally active polymer with an ?,?-ethylenically unsaturated compound that includes a group 2-13 element so as to provide a functionalized polymer. The resulting polymer exhibits enhanced interactivity with particulate fillers and can be used in the manufacture of vulcanizates.Type: GrantFiled: December 20, 2012Date of Patent: January 31, 2017Assignee: Bridgestone CorporationInventors: Zengquan Qin, Terrence E. Hogan, Toshihiro Uchiyama, Joshua P. Abell, Steven Luo
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Publication number: 20160130423Abstract: Disclosed herein are rubber compositions comprising at least one conjugated diene polymer or copolymer, silica filler, and a silica shielding agent of formula (I), and related methods such as for improving silica dispersability in silica-filled rubber compositions. Also disclosed herein are tire components, such as tire treads containing the rubber compositions disclosed herein.Type: ApplicationFiled: November 5, 2015Publication date: May 12, 2016Inventors: Yaohong Chen, Arif O. Gozen, Toshihiro Uchiyama
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Publication number: 20150315362Abstract: Disclosed herein are vulcanizable and vulcanized rubber compositions comprising a conjugated diene polymer or copolymer, silica, and a substituted imidazole-based silica shielding agent of Formula (I), and methods for preparing such rubber compositions. Also disclosed herein are tire components, such as tire treads, containing the rubber compositions disclosed herein.Type: ApplicationFiled: April 30, 2015Publication date: November 5, 2015Applicant: Bridgestone CorporationInventors: Yaohong Chen, Arif Omer Gozen, Toshihiro Uchiyama
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Publication number: 20150274939Abstract: The present disclosure provides reinforcing filler-containing rubber compositions suitable for use in tires, and particularly in tire treads. These rubber compositions comprise a metal carboxylate. The metal carboxylate provides improved processability to the rubber compositions in the form of a reduced Mooney viscosity. In certain exemplary embodiments, these rubber compositions containing the metal carboxylate also have an enhanced elastic modulus (also referred to as the G?). Further, in certain of the enhanced elastic modulus embodiments, the rubber compositions containing the metal carboxylate also have decreased hysteresis loss.Type: ApplicationFiled: November 4, 2013Publication date: October 1, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Yaohong Chen, Toshihiro Uchiyama, Arif O. Gozen, Mindaugas Rackaitis
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Publication number: 20150011710Abstract: A method for providing a polymer having terminal functionality involves reacting a terminally active polymer with an ?,?-ethylenically unsaturated compound that includes a group 2-13 element so as to provide a functionalized polymer. The resulting polymer exhibits enhanced interactivity with particulate fillers and can be used in the manufacture of vulcanizates.Type: ApplicationFiled: December 20, 2012Publication date: January 8, 2015Applicant: Bridgestone CorporationInventors: Zengquan Qin, Terrence E. Hogan, Toshihiro Uchiyama, Joshua P. Abell, Steven Luo
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Patent number: 8722806Abstract: An object of the present invention is to provide a rubber composition for a tire, which is, when it is used as a rubber composition for a tire, capable of exhibiting good dry grip properties and excellent grip properties in both a relatively low temperature range and a relatively high temperature range, as well as a tire produced by using the rubber composition. The rubber composition of the present invention contains: a rubber component made of at least one type of diene-based polymer; and a copolymer resin obtained by copolymerizing ?-methylstyrene based monomer and aromatic vinyl monomer.Type: GrantFiled: February 16, 2009Date of Patent: May 13, 2014Assignee: Bridgestone CorporationInventors: Toshihiro Uchiyama, Seiichi Kato, Rika Fukushima
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Patent number: 8673998Abstract: A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent; introducing a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas; and isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.Type: GrantFiled: September 22, 2011Date of Patent: March 18, 2014Assignee: Bridgestone CorporationInventors: Kevin M McCauley, Toshihiro Uchiyama, Christine M. Rademacher, Terrence E. Hogan
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Publication number: 20120071583Abstract: A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent; introducing a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas; and isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.Type: ApplicationFiled: September 22, 2011Publication date: March 22, 2012Inventors: Toshihiro UCHIYAMA, Christine M. Rademacher, Terrence E. Hogan, Kevin M. McCauley
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Publication number: 20110196100Abstract: An object of the present invention is to provide a rubber composition for a tire, which is, when it is used as a rubber composition for a tire, capable of exhibiting good dry grip properties and excellent grip properties in both a relatively low temperature range and a relatively high temperature range, as well as a tire produced by using the rubber composition. The rubber composition of the present invention contains: a rubber component made of at least one type of diene-based polymer; and a copolymer resin obtained by copolymerizing ?-methylstyrene based monomer and aromatic vinyl monomer.Type: ApplicationFiled: February 16, 2009Publication date: August 11, 2011Applicant: BRIDGESTONE CORPORATIONInventors: Toshihiro Uchiyama, Seiichi Kato, Rika Fukushima