Patents by Inventor Yusuke Sunada
Yusuke Sunada 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: 10829504Abstract: Provided are a novel isocyanide compound, a hydrosilylation reaction catalyst having excellent handling properties and storage properties that allows a hydrosilylation reaction to proceed under moderate conditions by using the isocyanide compound, and a method for producing an addition compound by a hydrosilylation reaction using the hydrosilylation reaction catalyst. A hydrosilylation reaction catalyst prepared from a catalyst precursor comprising a transition metal compound of groups 8, 9, or 10 of the periodic table, excluding platinum, such as an iron carboxylate, cobalt carboxylate, or nickel carboxylate, and a ligand comprising an isocyanide compound having an organosiloxane group.Type: GrantFiled: January 18, 2017Date of Patent: November 10, 2020Assignees: SHIN-ETSU CHEMICAL CO., LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Koji Sakuta, Hideo Nagashima, Yusuke Sunada, Daisuke Noda
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Publication number: 20200165274Abstract: Provided are a novel isocyanide compound, a hydrosilylation reaction catalyst having excellent handling properties and storage properties that allows a hydrosilylation reaction to proceed under moderate conditions by using the isocyanide compound, and a method for producing an addition compound by a hydrosilylation reaction using the hydrosilylation reaction catalyst. A hydrosilylation reaction catalyst prepared from a catalyst precursor comprising a transition metal compound of groups 8, 9, or 10 of the periodic table, excluding platinum, such as an iron carboxylate, cobalt carboxylate, or nickel carboxylate, and a ligand comprising an isocyanide compound having an organosiloxane group.Type: ApplicationFiled: January 18, 2017Publication date: May 28, 2020Applicants: SHIN-ETSU CHEMICAL CO., LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Koji SAKUTA, Hideo NAGASHIMA, Yusuke SUNADA, Daisuke NODA
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Patent number: 10363551Abstract: A mononuclear iron bivalent complex having iron-silicon bonds, which is represented by formula (1), can exhibit an excellent catalytic activity in at least one reaction selected from three reactions, i.e., a hydrosilylation reaction, a hydrogenation reaction and a reaction for reducing a carbonyl compound.Type: GrantFiled: March 8, 2016Date of Patent: July 30, 2019Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Mina Sawano, Daisuke Noda, Koji Sakuta
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Patent number: 10239896Abstract: A hydrosilylation iron catalyst prepared from a two-electron ligand (L) and a mononuclear, binuclear, or trinuclear complex of iron indicated by formula (1), Fe having bonds with carbon atoms included in X and the total number of Fe-carbon bonds being 2-10. As a result of using iron, the hydrosilylation iron catalyst is advantageous from a cost perspective as well as being easily synthesized. Hydrosilylation reactions can be promoted under mild conditions by using this catalyst. Fe(X)a??(1) (in the formula, each X independently indicates a C2-30 ligand that may include an unsaturated group excluding carbonyl groups (CO groups) and cyclopentadienyl groups, however at least one X includes an unsaturated group, a indicates an integer of 2-4 per Fe atom.Type: GrantFiled: August 19, 2015Date of Patent: March 26, 2019Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Daisuke Noda, Hiroe Soejima, Koji Sakuta
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Publication number: 20180243732Abstract: A mononuclear iron bivalent complex having iron-silicon bonds, which is represented by formula (1), can exhibit an excellent catalytic activity in at least one reaction selected from three reactions, i.e., a hydrosilylation reaction, a hydrogenation reaction and a reaction for reducing a carbonyl compound.Type: ApplicationFiled: March 8, 2016Publication date: August 30, 2018Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo NAGASHIMA, Yusuke SUNADA, Mina SAWANO, Daisuke NODA, Koji SAKUTA
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Publication number: 20180200703Abstract: A hydrosilylation reaction catalyst prepared from: a prescribed transition metal compound such as iron pivalate, cobalt pivalate, iron acetate, cobalt acetate, or nickel acetate; a ligand comprising t-butylisocyanide or another isocyanide compound; and a borane compound, Grignard reagent, alkoxysilane, or other prescribed promoter makes it possible to promote a hydrosilylation reaction under moderate conditions, and has exceptional handling properties and storage stability.Type: ApplicationFiled: July 6, 2016Publication date: July 19, 2018Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo NAGASHIMA, Yusuke SUNADA, Atsushi TAHARA, Daisuke NODA, Koji SAKUTA
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Patent number: 10005797Abstract: A hydrosilylation reaction catalyst prepared from: a catalyst precursor comprising a transition metal compound, excluding platinum, belonging to group 8-10 of the periodic table, e.g., iron acetate, cobalt acetate, nickel acetate, etc.; and a ligand comprising an isocyanide compound such as t-butyl isocyanide. The hydrosilylation reaction catalyst has excellent handling and storage properties. As a result of using this catalyst, a hydrosilylation reaction can be promoted under gentle conditions.Type: GrantFiled: August 12, 2015Date of Patent: June 26, 2018Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Atsushi Tahara, Daisuke Noda, Hiroe Soejima, Koji Sakuta
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Patent number: 10000515Abstract: A hydrosilylation reaction catalyst prepared from: a catalyst precursor comprising a transition metal compound, excluding platinum, belonging to group 8-10 of the periodic table, e.g., iron acetate, cobalt acetate, nickel acetate, etc.; and a ligand comprising a carbine compound such as 1,3-dimesitylimidazol-2-ylidene, etc.. The hydrosilylation reaction catalyst has excellent handling and storage properties. As a result of using this catalyst, a hydrosilylation reaction can be promoted under gentle conditions.Type: GrantFiled: August 12, 2015Date of Patent: June 19, 2018Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Atsushi Tahara, Daisuke Noda, Hiroe Soejima, Koji Sakuta
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Patent number: 9884316Abstract: A neutral or cationic mononuclear ruthenium divalent complex represented by formula (1) can actualize exceptional catalytic activity in at least one reaction among a hydrosilylation reaction, hydrogenation reaction, and carbonyl compound reduction reaction. (In the formula, R1-R6 each independently represent a hydrogen atom or an alkyl group, aryl group, aralkyl group, organooxy group, monoorganoamino group, diorganoamino group, monoorganophosphino group, diorganophosphino group, monoorganosilyl group, diorganosilyl group, triorganosilyl group, or organothio group optionally substituted by X; at least one pair comprising any of R1-R3 and any of R4-R6 together represents a crosslinkable substituent; X represents a halogen atom, organooxy group, monoorganoamino group, diorganoamino group, or organothio group; L each independently represent a two-electron ligand other than CO and thiourea ligands; two L may bond to each other; and m represents an integer of 3 or 4.Type: GrantFiled: March 3, 2015Date of Patent: February 6, 2018Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Hajime Ogushi, Koji Sakuta
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Patent number: 9782762Abstract: Provided is a mononuclear ruthenium complex that comprises a ruthenium-silicon bond that is represented by formula (1) and that exhibits excellent catalyst activity in each of a hydrosilylation reaction, a hydrogenation reaction, and reduction of a carbonyl compound. In formula (1), R1-R6 either independently represent an alkyl group, an aryl group, an aralkyl group or the like that may be substituted with a hydrogen atom or X, or represent a crosslinking substituent in which at least one pair comprising one of R1-R3 and one of R4-R6 is combined. X represents a halogen atom, an organoxy group, or the like. L represents a two-electron ligand other than CO and phosphine. When a plurality of L are present, the plurality of L may be the same as or different from each other. When two L are present, the two L may be bonded to each other. n and m independently represent an integer of 1 to 3 with the stipulation that n+m equals 3 or 4.Type: GrantFiled: February 26, 2014Date of Patent: October 10, 2017Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Hironori Tsutsumi, Toru Hashimoto, Koji Sakuta
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Publication number: 20170260216Abstract: A hydrosilylation iron catalyst prepared from a two-electron ligand (L) and a mononuclear, binuclear, or trinuclear complex of iron indicated by formula (1), Fe having bonds with carbon atoms included in X and the total number of Fe-carbon bonds being 2-10. As a result of using iron, the hydrosilylation iron catalyst is advantageous from a cost perspective as well as being easily synthesized. Hydrosilylation reactions can be promoted under mild conditions by using this catalyst. Fe(X)a??(1) (in the formula, each X independently indicates a C2-30 ligand that may include an unsaturated group excluding carbonyl groups (CO groups) and cyclopentadienyl groups, however at least one X includes an unsaturated group, a indicates an integer of 2-4 per Fe atom.Type: ApplicationFiled: August 19, 2015Publication date: September 14, 2017Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo NAGASHIMA, Yusuke SUNADA, Daisuke NODA, Hiroe SOEJIMA, Koji SAKUTA
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Publication number: 20170260215Abstract: A hydrosilylation reaction catalyst prepared from: a catalyst precursor comprising a transition metal compound, excluding platinum, belonging to group 8-10 of the periodic table, e.g., iron acetate, cobalt acetate, nickel acetate, etc.; and a ligand comprising a carbine compound such as 1,3-dimesitylimidazol-2-ylidene, etc. The hydrosilylation reaction catalyst has excellent handling and storage properties. As a result of using this catalyst, a hydrosilylation reaction can be promoted under gentle conditions.Type: ApplicationFiled: August 12, 2015Publication date: September 14, 2017Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo NAGASHIMA, Yusuke SUNADA, Atsushi TAHARA, Daisuke NODA, Hiroe SOEJIMA, Koji SAKUTA
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Publication number: 20170233417Abstract: A hydrosilylation reaction catalyst prepared from: a catalyst precursor comprising a transition metal compound, excluding platinum, belonging to group 8-10 of the periodic table, e.g., iron acetate, cobalt acetate, nickel acetate, etc.; and a ligand comprising an isocyanide compound such as t-butyl isocyanide. The hydrosilylation reaction catalyst has excellent handling and storage properties. As a result of using this catalyst, a hydrosilylation reaction can be promoted under gentle conditions.Type: ApplicationFiled: August 12, 2015Publication date: August 17, 2017Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo NAGASHIMA, Yusuke SUNADA, Atsushi TAHARA, Daisuke NODA, Hiroe SOEJIMA, Koji SAKUTA
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Publication number: 20170056872Abstract: A neutral or cationic mononuclear ruthenium divalent complex represented by formula (1) can actualize exceptional catalytic activity in at least one reaction among a hydrosilylation reaction, hydrogenation reaction, and carbonyl compound reduction reaction. (In the formula, R1-R6 each independently represent a hydrogen atom or an alkyl group, aryl group, aralkyl group, organooxy group, monoorganoamino group, diorganoamino group, monoorganophosphino group, diorganophosphino group, monoorganosilyl group, diorganosilyl group, triorganosilyl group, or organothio group optionally substituted by X; at least one pair comprising any of R1-R3 and any of R4-R6 together represents a crosslinkable substituent; X represents a halogen atom, organooxy group, monoorganoamino group, diorganoamino group, or organothio group; L each independently represent a two-electron ligand other than CO and thiourea ligands; two L may bond to each other; and m represents an integer of 3 or 4.Type: ApplicationFiled: March 3, 2015Publication date: March 2, 2017Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo NAGASHIMA, Yusuke SUNADA, Hajime OGUSHI, Koji SAKUTA
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Patent number: 9421532Abstract: Provided is a mononuclear iron complex that comprises an iron-silicon bond that is represented by formula (1) and that exhibits excellent catalyst activity in each of a hydrosilylation reaction, a hydrogenation reaction, and reduction of a carbonyl compound. In formula (1), R1-R6 either independently represent an alkyl group, an aryl group, an aralkyl group or the like that may be substituted with a hydrogen atom or X, or represent a crosslinking substituent in which at least one pair comprising one of R1-R3 and one of R4-R6 is combined. X represents a halogen atom, an organoxy group, or the like. L represents a two-electron ligand other than CO. When a plurality of L are present, the plurality of L may be the same as or different from each other. When two L are present, the two L may be bonded to each other. n and m independently represent an integer of 1 to 3 with the stipulation that n+m equals 3 or 4.Type: GrantFiled: February 26, 2014Date of Patent: August 23, 2016Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hideo Nagashima, Yusuke Sunada, Hironori Tsutsumi, Toru Hashimoto, Koji Sakuta
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Publication number: 20160023197Abstract: Provided is a mononuclear ruthenium complex that comprises a ruthenium-silicon bond that is represented by formula (1) and that exhibits excellent catalyst activity in each of a hydrosilylation reaction, a hydrogenation reaction, and reduction of a carbonyl compound. In formula (1), R1-R6 either independently represent an alkyl group, an aryl group, an aralkyl group or the like that may be substituted with a hydrogen atom or X, or represent a crosslinking substituent in which at least one pair comprising one of R1-R3 and one of R4-R6 is combined. X represents a halogen atom, an organoxy group, or the like. L represents a two-electron ligand other than CO and phosphine. When a plurality of L are present, the plurality of L may be the same as or different from each other. When two L are present, the two L may be bonded to each other. n and m independently represent an integer of 1 to 3 with the stipulation that n+m equals 3 or 4.Type: ApplicationFiled: February 26, 2014Publication date: January 28, 2016Applicants: SHIN-ETSU CHEMICAL CO., LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Hideo NAGASHIMA, Yusuke SUNADA, Hironori TSUTSUMI, Toru HASHIMOTO, Koji SAKUTA
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Publication number: 20160023196Abstract: Provided is a mononuclear iron complex that comprises an iron-silicon bond that is represented by formula (1) and that exhibits excellent catalyst activity in each of a hydrosilylation reaction, a hydrogenation reaction, and reduction of a carbonyl compound. In formula (1), R1-R6 either independently represent an alkyl group, an aryl group, an aralkyl group or the like that may be substituted with a hydrogen atom or X, or represent a crosslinking substituent in which at least one pair comprising one of R1-R3 and one of R4-R6 is combined. X represents a halogen atom, an organoxy group, or the like. L represents a two-electron ligand other than CO. When a plurality of L are present, the plurality of L may be the same as or different from each other. When two L are present, the two L may be bonded to each other. n and m independently represent an integer of 1 to 3 with the stipulation that n+m equals 3 or 4.Type: ApplicationFiled: February 26, 2014Publication date: January 28, 2016Applicants: Shin-Etsu Chemical Co., Ltd., Kyushu University, National University CorporationInventors: Hideo NAGASHIMA, Yusuke SUNADA, Hironori TSUTSUMI, Toru HASHIMOTO, Koji SAKUTA
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Patent number: 4414433Abstract: A microphone output transmission circuit for a capactive microphone such as an electret microphone employs a differential amplifier to provide a transformerless balanced connection to a microphone transmission line, either at the transmission end or at the reception end thereof. Power is applied in a phantom connection by superimposing a DC voltage on two balanced signal conductors of the transmission line, and using the shield thereof as a ground return line. A pair of microphones with oppositely-directed sound-gathering planes can be connected to respective inputs of a differential amplifier at the transmission end, so that the two microphones together have a bidirectional characteristic.Type: GrantFiled: June 16, 1981Date of Patent: November 8, 1983Assignee: Sony CorporationInventors: Masao Horie, Yusuke Sunada, Junta Inari