Patents by Inventor Shigeru Yamago
Shigeru Yamago 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).
-
Publication number: 20240084049Abstract: The present invention provides a stereocontrol catalyst for use in radical polymerization that is applicable to polymerization of a broad range of monomers and that enables polymerization with control of both molecular weight (molecular weight distribution) and stereoselectivity, a method for producing a polymer using the stereocontrol catalyst for use in radical polymerization, and an acrylic polymer. Provided is a stereocontrol catalyst for use in radical polymerization, containing: a rare-earth metal salt compound; and a hydroxy group-containing compound.Type: ApplicationFiled: September 9, 2020Publication date: March 14, 2024Applicant: Kyoto UniversityInventor: Shigeru Yamago
-
Patent number: 11820838Abstract: An object of the present invention is to provide a diene-based polymer that can control the crosslinking morphology. The present invention provides a modified diene-based polymer having a structure represented by the formula (1). [In the formula (1), R1 and R2 represent an alkyl group having 1 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aralkyl group having 6 or more carbon atoms, a hydrogen atom, or a halogen atom; and Z is an organic group, an organic group where a part of hydrogen atom of the above organic group is substituted, a hydrogen atom, or a halogen atom.Type: GrantFiled: April 1, 2022Date of Patent: November 21, 2023Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., SHIGERU YAMAGOInventors: Takumi Kaneko, Kazuyoshi Shiga, Shigeru Yamago
-
Patent number: 11787879Abstract: An object of the present invention is to provide a production method of a diene-based polymer that can control the crosslinking morphology. The present invention provides a method for producing a modified diene-based polymer having a structure represented by the formula (1), comprising a first step of mixing a diene-based polymer and a dithioester compound to prepare a mixture; and a second step of irradiating a ray to the mixture under an inert atmosphere. [In the formula (1), R1 and R2 represent an alkyl group having 1 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aralkyl group having 6 or more carbon atoms, a hydrogen atom, or a halogen atom; and Z is an organic group, an organic group where a part of hydrogen atom of the above organic group is substituted, a hydrogen atom, or a halogen atom.Type: GrantFiled: April 1, 2022Date of Patent: October 17, 2023Assignees: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takumi Kaneko, Kazuyoshi Shiga, Shigeru Yamago
-
Publication number: 20230295384Abstract: A polymer particle manufacturing method according to the present invention includes: (i) mixing a dispersion A5 of polymer particles A3 with a reactant, the dispersion A5 including the polymer particles A3 and a first solvent 4 in which the polymer particles A3 are dispersed, the polymer particles A3 being formed from a structurally controlled polymer having an organotellurium group 1 at a growing end thereof, the polymer being synthesized by an emulsion polymerization with use of a first organotellurium compound as a polymerization control agent, the reactant being soluble in the first solvent 4; and removing the organotellurium group 1 from the growing end of the polymer to obtain a liquid mixture 8 including a second organotellurium compound 6 generated by a reaction between the reactant and the organotellurium group 1 and polymer particles B7 having an organotellurium group 1 reduced relative to the organotellurium group 1 in the polymer particles A3; and (ii) separating, from the liquid mixture 8, the poType: ApplicationFiled: May 11, 2021Publication date: September 21, 2023Inventors: Shigeru YAMAGO, Masatoshi TOSAKA
-
Publication number: 20220325012Abstract: An object of the present invention is to provide a production method of a diene-based polymer that can control the crosslinking morphology. The present invention provides a method for producing a modified diene-based polymer having a structure represented by the formula (1), comprising a first step of mixing a diene-based polymer and a dithioester compound to prepare a mixture; and a second step of irradiating a ray to the mixture under an inert atmosphere. [In the formula (1), R1 and R2 represent an alkyl group having 1 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aralkyl group having 6 or more carbon atoms, a hydrogen atom, or a halogen atom; and Z is an organic group, an organic group where a part of hydrogen atom of the above organic group is substituted, a hydrogen atom, or a halogen atom.Type: ApplicationFiled: April 1, 2022Publication date: October 13, 2022Applicants: Sumitomo Rubber Industries, Ltd.Inventors: Takumi KANEKO, Kazuyoshi SHIGA, Shigeru YAMAGO
-
Publication number: 20220315672Abstract: An object of the present invention is to provide a diene-based polymer that can control the crosslinking morphology. The present invention provides a modified diene-based polymer having a structure represented by the formula (1). [In the formula (1), R1 and R2 represent an alkyl group having 1 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aralkyl group having 6 or more carbon atoms, a hydrogen atom, or a halogen atom; and Z is an organic group, an organic group where a part of hydrogen atom of the above organic group is substituted, a hydrogen atom, or a halogen atom.Type: ApplicationFiled: April 1, 2022Publication date: October 6, 2022Applicants: Sumitomo Rubber Industries, Ltd., SHIGERU YAMAGOInventors: Takumi KANEKO, Kazuyoshi SHIGA, Shigeru YAMAGO
-
Patent number: 11427538Abstract: An organic tellurium compound is disclosed having a versatility that, when used as a living radical polymerization initiator, it is applicable to polymerization of a vinyl monomer in an aqueous vehicle without using any surfactant or dispersant. The organic tellurium compound is represented by a general formula (1), where R1 and R2 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, A represents an alkali metal atom or an alkaline earth metal atom, x=1 when A is monovalent, x=½ when A is divalent, and R3 is represented by a general formula (2), where in the general formula (2) R4 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R5 and R6 each independently represent an alkylene group having 2 to 8 carbon atoms, and a represents an integer from 0 to 10.Type: GrantFiled: April 23, 2018Date of Patent: August 30, 2022Assignees: KYOTO UNIVERSITY, OTSUKA CHEMICAL CO., LTD.Inventors: Shigeru Yamago, Osamu Ito
-
Publication number: 20210249687Abstract: Provided herein are rechargeable battery (e.g., Li-ion and Li-metal anode) catholytes and electrolyte separators that include a chemically cross-linked polymer and a solvent selected from the group consisting of a nitrile, a dinitrile, or a combination thereof; processes for making and using the same; and rechargeable batteries and electrochemical cells that include high voltage stable catholytes and/or electrolyte separators.Type: ApplicationFiled: April 30, 2019Publication date: August 12, 2021Inventors: Mohit SINGH, Will HUDSON, Shigeru YAMAGO
-
Patent number: 10808065Abstract: Provided are a method for producing a multibranched polymer that can produce a multibranched polymer having a narrow molecular weight distribution in a one-pot procedure and the multibranched polymer. A method for producing a multibranched polymer includes the step of polymerizing a first vinyl monomer having a polymerization-initiating group in an ?-position of a vinyl bond and a second vinyl monomer free of polymerization-initiating group in an ?-position of a vinyl bond by a living radical polymerization.Type: GrantFiled: April 21, 2017Date of Patent: October 20, 2020Assignees: KYOTO UNIVERSITY, OTSUKA CHEMICAL CO., LTD.Inventors: Shigeru Yamago, Minoru Yamamoto
-
Patent number: 10689336Abstract: The present invention involves a radical polymerization initiator comprising an organotellurium compound represented by a formula (1), wherein R1 represents an alkyl group or the like, each of R2 and R3 independently represents a hydrogen atom or the like, and each of R4, R5, and R6 independently represents a hydrogen atom or the like. The present invention provides: a radical polymerization initiator that is useful for producing a polymer that includes a double bond at the molecular terminal; and a method for producing a polymer that utilizes the radical polymerization initiator.Type: GrantFiled: June 12, 2019Date of Patent: June 23, 2020Assignees: ZEON CORPORATION, KYOTO UNIVERSITYInventors: Fumiaki Bando, Shigeru Yamago
-
Publication number: 20200048192Abstract: An organic tellurium compound is disclosed having a versatility that, when used as a living radical polymerization initiator, it is applicable to polymerization of a vinyl monomer in an aqueous vehicle without using any surfactant or dispersant. The organic tellurium compound is represented by a general formula (1), where R1 and R2 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, A represents an alkali metal atom or an alkaline earth metal atom, x=1 when A is monovalent, x=½ when A is divalent, and R3 is represented by a general formula (2), where in the general formula (2) R4 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R5 and R6 each independently represent an alkylene group having 2 to 8 carbon atoms, and a represents an integer from 0 to 10.Type: ApplicationFiled: April 23, 2018Publication date: February 13, 2020Applicants: Kyoto University, OTSUKA CHEMICAL CO., LTD.Inventors: Shigeru Yamago, Osamu Ito
-
Publication number: 20190292146Abstract: The present invention involves a radical polymerization initiator comprising an organotellurium compound represented by a formula (1), wherein R1 represents an alkyl group or the like, each of R2 and R3 independently represents a hydrogen atom or the like, and each of R4, R5, and R6 independently represents a hydrogen atom or the like. The present invention provides: a radical polymerization initiator that is useful for producing a polymer that includes a double bond at the molecular terminal; and a method for producing a polymer that utilizes the radical polymerization initiator.Type: ApplicationFiled: June 12, 2019Publication date: September 26, 2019Applicants: KYOTO UNIVERSITY, ZEON CORPORATIONInventors: Fumiaki Bando, Shigeru Yamago
-
Publication number: 20190106524Abstract: Provided are a method for producing a multibranched polymer that can produce a multibranched polymer having a narrow molecular weight distribution in a one-pot procedure and the multibranched polymer. A method for producing a multibranched polymer includes the step of polymerizing a first vinyl monomer having a polymerization-initiating group in an ?-position of a vinyl bond and a second vinyl monomer free of polymerization-initiating group in an ?-position of a vinyl bond by a living radical polymerization.Type: ApplicationFiled: April 21, 2017Publication date: April 11, 2019Applicants: Kyoto University, OTSUKA CHEMICAL CO., LTDInventors: Shigeru Yamago, Minoru Yamamoto
-
Publication number: 20160297755Abstract: The present invention involves a radical polymerization initiator comprising an organotellurium compound represented by a formula (1), wherein R1 represents an alkyl group or the like, each of R2 and R3 independently represents a hydrogen atom or the like, and each of R4, R5, and R6 independently represents a hydrogen atom or the like. The present invention provides: a radical polymerization initiator that is useful for producing a polymer that includes a double bond at the molecular terminal; and a method for producing a polymer that utilizes the radical polymerization initiator.Type: ApplicationFiled: November 27, 2014Publication date: October 13, 2016Applicants: Zeon Corporation, Kyoto UniversityInventors: Fumiaki BANDO, Shigeru YAMAGO
-
Patent number: 8895768Abstract: Provided are a cyclopara(hetero)arylene compound and a method for producing the same. More specifically, provided is a cycloparaphenylene compound represented by Formula (I): wherein Ar1, Ar2, Ar3, and Ar4 are the same or different, and represent an optionally substituted divalent aromatic group or an optionally substituted divalent heteroaromatic group, and n1, n2, n3, and n4 are the same or different, and represent an integer of 1 or more.Type: GrantFiled: September 29, 2010Date of Patent: November 25, 2014Assignee: Kyoto UniversityInventor: Shigeru Yamago
-
Patent number: 8664372Abstract: In preparing a glycoside compound from (a) a furanose compound or pyranose compound, and (b) an alcohol compound, a process for preparing a glycoside compound in which glycosidic bond locates selectively trans form relative to C-2 hydroxyl group, the process comprising using a furanose compound wherein the hydroxyl at the 2-position may have a substituent protected with a group A, or a pyranose compound which may have a substituent wherein R2 and R3 are the same or different and are each alkyl having 1 to 4 carbon atoms or aryl having or not having a substituent, or R2 and R3 are combined to form alkylene having 2 to 4 carbon atoms (the alkylene may be substituted with alkyl having 1 to 4 carbon atoms, or may have intervening phenylene), and m and n are each an integer of 0 or 1.Type: GrantFiled: May 22, 2012Date of Patent: March 4, 2014Assignee: Glytech, Inc.Inventor: Shigeru Yamago
-
Patent number: 8653175Abstract: The present invention provides a terminally modified acrylic polymer having excellent thermal decomposition properties at low temperatures, an inorganic fine particle dispersed paste composition obtained by using the terminally modified acrylic polymer and a method of producing of the terminally modified acrylic polymer.Type: GrantFiled: August 7, 2012Date of Patent: February 18, 2014Assignee: Sekisui Chemical Co., Ltd.Inventors: Shigeru Yamago, Hiroji Fukui
-
Publication number: 20130066003Abstract: The present invention provides a terminally modified acrylic polymer having excellent thermal decomposition properties at low temperatures, an inorganic fine particle dispersed paste composition obtained by using the terminally modified acrylic polymer and a method of producing of the terminally modified acrylic polymer.Type: ApplicationFiled: August 7, 2012Publication date: March 14, 2013Inventors: Shigeru YAMAGO, Hiroji FUKUI
-
Publication number: 20120232256Abstract: In preparing a glycoside compound from (a) a furanose compound or pyranose compound, and (b) an alcohol compound, a process for preparing a glycoside compound in which glycosidic bond locates selectively trans form relative to C-2 hydroxyl group, the process comprising using a furanose compound wherein the hydroxyl at the 2-position may have a substituent protected with a group A, or a pyranose compound which may have a substituent wherein R2 and R3 are the same or different and are each alkyl having 1 to 4 carbon atoms or aryl having or not having a substituent, or R2 and R3 are combined to form alkylene having 2 to 4 carbon atoms (the alkylene may be substituted with alkyl having 1 to 4 carbon atoms, or may have intervening phenylene), and m and n are each an integer of 0 or 1.Type: ApplicationFiled: May 22, 2012Publication date: September 13, 2012Inventor: Shigeru Yamago
-
Publication number: 20120220790Abstract: Provided are a cyclopara(hetero)arylene compound and a method for producing the same. More specifically, provided is a cycloparaphenylene compound represented by Formula (I): wherein Ar1, Ar2, Ar3, and Ar4 are the same or different, and represent an optionally substituted divalent aromatic group or an optionally substituted divalent heteroaromatic group, and n1, n2, n3, and n4 are the same or different, and represent an integer of 1 or more.Type: ApplicationFiled: September 29, 2010Publication date: August 30, 2012Applicant: KYOTO UNIVERSITYInventor: Shigeru Yamago