Patents by Inventor Hideo Nagashima
Hideo Nagashima 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).
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
Patent number: 9243084Abstract: There is provided a novel production method of a chlorinated hyperbranched polymer that is optically stable and is capable of derivatizing the chlorinated hyperbranched polymer into various compounds. A production method of a chlorinated hyperbranched polymer for producing a chlorinated hyperbranched polymer of Formula (1): {where X is a chlorine atom; R1 is a hydrogen atom or a methyl group; and A1 is a phenylene-alkylene group, n is the number of repeating unit structures and is an integer of 2 to 100,000}, comprising the step of substituting a dithiocarbamate group of a hyperbranched polymer of Formula (3): (where R1, A1, and n are the same as defined in Formula (1); and each of R2 and R3 is a C1-5 alkyl group, a C1-5 hydroxyalkyl group, or a C7-12 arylalkyl group, or R2 and R3 optionally form a ring together with a nitrogen atom bonded to R2 and R3) with a chlorine atom using sulfuryl chloride.Type: GrantFiled: March 2, 2012Date of Patent: January 26, 2016Assignees: KYUSHU UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hideo Nagashima, Keisuke Kojima, Akihiro Tanaka, Keisuke Odoi, Osamu Uesugi
-
Publication number: 20140288264Abstract: A metal fine particle dispersant for forming a disperse system of metal fine particles, the metal fine particle dispersant having a branched polymer compound having an ammonium group and having a weight average molecular weight of 500 to 5,000,000.Type: ApplicationFiled: March 18, 2014Publication date: September 25, 2014Applicants: KYUSHU UNIVERSITY, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Keisuke KOJIMA, Akihiro TANAKA, Keisuke ODOI, Hideo NAGASHIMA, Takashi SUE
-
Patent number: 8722562Abstract: There is provided a metal fine particle dispersant containing a branched polymer compound having an ammonium group. The metal fine particle dispersant of the present invention comprises a branched polymer compound having an ammonium group and having a weight average molecular weight of 500 to 5,000,000. The metal fine particle dispersant has the structure of Formula (1): The present invention also relates to a composition comprising the metal fine particle dispersant and a metal fine particle.Type: GrantFiled: August 21, 2009Date of Patent: May 13, 2014Assignees: Nissan Chemical Industries, Ltd., Kyushu UniversityInventors: Keisuke Kojima, Akihiro Tanaka, Keisuke Odoi, Hideo Nagashima, Takashi Sue
-
Publication number: 20140073744Abstract: There is provided a novel production method of a chlorinated hyperbranched polymer that is optically stable and is capable of derivatizing the chlorinated hyperbranched polymer into various compounds. A production method of a chlorinated hyperbranched polymer for producing a chlorinated hyperbranched polymer of Formula (1): {where X is a chlorine atom; R1 is a hydrogen atom or a methyl group; and A1 is a phenylene-alkylene group, n is the number of repeating unit structures and is an integer of 2 to 100,000}, comprising the step of substituting a dithiocarbamate group of a hyperbranched polymer of Formula (3): (where R1, A1, and n are the same as defined in Formula (1); and each of R2 and R3 is a C1-5 alkyl group, a C1-5 hydroxyalkyl group, or a C7-12 arylalkyl group, or R2 and R3 optionally form a ring together with a nitrogen atom bonded to R2 and R3) with a chlorine atom using sulfuryl chloride.Type: ApplicationFiled: March 2, 2012Publication date: March 13, 2014Applicants: NISSAN CHEMICAL INDUSTRIES, LTD., KYUSHU UNIVERSITYInventors: Hideo Nagashima, Keisuke Kojima, Akihiro Tanaka, Keisuke Odoi, Osamu Uesugi
-
Publication number: 20110318554Abstract: There is provided a polymer having a high refractive index without forming a complex with inorganic fine particles, being excellent in the solubility in an organic solvent and the coating properties during film formation, and having a high transparency, and further being capable of dispersing optically homogeneously a functional dye such as a nonlinear dye in a high concentration. A hyperbranched polymer containing a thioester group of Formula (1) below [where R1 is a hydrogen atom or a methyl group; Ar1 and Ar2 are independently an aromatic ring group constituted of 5 to 18 ring atoms that is optionally substituted with a C1-6 alkyl group, a C1-6 alkoxy group, a C1-6 alkylthio group, or a halogen atom, the aromatic ring group optionally contains a hetero atom, or is optionally an aromatic ring group formed by two or more fused rings; A? is a structure of Formula (2) or Formula (3) below; and n is the number of repeating unit structures and is an integer of 2 to 100,000].Type: ApplicationFiled: January 27, 2010Publication date: December 29, 2011Applicants: NISSAN CHEMICAL INDUSTRIES, LTD., KYUSHU UNIVERSITYInventors: Hideo Nagashima, Shiyoshi Yokoyama, Shin-ichiro Inoue, Azusa Inoue, Keisuke Kojima
-
Publication number: 20110183837Abstract: There is provided a metal fine particle dispersant containing a branched polymer compound having an ammonium group. The metal fine particle dispersant of the present invention comprises a branched polymer compound having an ammonium group and having a weight average molecular weight of 500 to 5,000,000. The metal fine particle dispersant has the structure of Formula (1): The present invention also relates to a composition comprising the metal fine particle dispersant and a metal fine particle.Type: ApplicationFiled: August 21, 2009Publication date: July 28, 2011Applicants: NISSAN CHEMICAL INDUSTRIES, LTD., KYUSHU UNIVERSITYInventors: Keisuke Kojima, Akihiro Tanaka, Keisuke Odoi, Hideo Nagashima, Takashi Sue
-
Patent number: 7674866Abstract: The object of the present invention is to provide a method of producing a polymer wherein radical-polymerizable monomers can be polymerized in a quantitative manner in a relatively short time, and a polymer or a block copolymer having at its termini a functional group that can be chemically converted while the polymer or the block copolymer has a high molecular weight can be produced. Furthermore, the object of the present invention is to provide a method of producing a polymer wherein the polymer is re-precipitated in a general solvent by an easy method, and the used iron complexes are recovered in the solvent, thereby recycling the iron complexes.Type: GrantFiled: September 12, 2006Date of Patent: March 9, 2010Assignees: Kyushu University, National University Corporation, Dainippon Ink and Chemicals, Inc.Inventors: Hideo Nagashima, Shota Niibayashi, Ren-Hua Jin, Hitoshi Hayakawa
-
Publication number: 20090118448Abstract: The object of the present invention is to provide a method of producing a polymer wherein radical-polymerizable monomers can be polymerized in a quantitative manner in a relatively short time, and a polymer or a block copolymer having at its termini a functional group that can be chemically converted while the polymer or the block copolymer has a high molecular weight can be produced. Furthermore, the object of the present invention is to provide a method of producing a polymer wherein the polymer is re-precipitated in a general solvent by an easy method, and the used iron complexes are recovered in the solvent, thereby recycling the iron complexes.Type: ApplicationFiled: September 12, 2006Publication date: May 7, 2009Applicants: Kyushu University, National University Corporatio, Dainippo Ink and Chemicals, Inc.Inventors: Hideo Nagashima, Shota Niibayashi, Ren-Hua Jin, Hitoshi Hayakawa
-
Patent number: 7425599Abstract: Disclosed is a technology for the production of polyvinyl ethers having a reactive silicon-containing functional or atomic group at the terminal thereof. The polyvinyl ether as expressed by the formula (VII) is prepared by allowing, in the presence of a catalyst composed of a polynuclear ruthenium-carbonyl complex in which carbonyl groups coordinate with two to four ruthenium atoms, a vinylether compound expressed by the formula (III) to react with a silane compound expressed by the formula (IV). In the formulae, R1, R2 and R3 each represents a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, R4 represents an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, or a silyl group, and X1, X2 and X3 each represents a hydrogen atom, a halogen atom, an amino group, an alkyl group, an alkoxy group, a thioalkyl group, an alkylamino group, an aryl group, an arylamino group, an aralkyl group a vinyl group, or a heterocyclic group.Type: GrantFiled: June 10, 2003Date of Patent: September 16, 2008Assignee: Japan Science and Technology AgencyInventors: Hideo Nagashima, Kouki Matsubara
-
Patent number: 7153916Abstract: Catalyst for polymerization of an olefin is provided, which comprises (A) a transition metal compound having a carbon-metal bond structure and (B) an activating co-catalyst, or (A) a transition metal compound having a carbon-metal bond structure, (B) an activating cocatalyst and (C) an organometallic compound.Type: GrantFiled: March 12, 2002Date of Patent: December 26, 2006Assignee: Tosoh CorporationInventors: Masao Tanabiki, Hideo Nagashima
-
Publication number: 20060142510Abstract: Disclosed is a technology for the production of polyvinyl ethers having a reactive silicon-containing functional or atomic group at the terminal thereof. The polyvinyl ether as expressed by the formula (VII) is prepared by allowing, in the presence of a catalyst composed of a polynuclear ruthenium-carbonyl complex in which carbonyl groups coordinate with two to four ruthenium atoms, a vinylether compound expressed by the formula (III) to react with a silane compound expressed by the formula (IV). In the formulae, R1, R2 and R3 each represents a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, R4 represents an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, or a silyl group, and X1, X2 and X3 each represents a hydrogen atom, a halogen atom, an amino group, an alkyl group, an alkoxy group, a thioalkyl group, an alkylamino group, an aryl group, an arylamino group, an aralkyl group a vinyl group, or a heterocyclic group.Type: ApplicationFiled: June 10, 2003Publication date: June 29, 2006Inventors: Hideo Nagashima, Kouki Matsubara