Patents by Inventor Masami Kamigaito
Masami Kamigaito 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: 10836834Abstract: Provided is a complex obtained by reacting a polymer compound derivative obtained by modifying part of the hydroxy groups or amino groups of a polymer compound having the hydroxy groups or amino groups with a compound represented by the following general formula (I) with one or more kinds of compounds represented by the following general formulae (II) to (V): (I) A-X—Si(Y)nR3-n; (II) M(OR1)nR24-n; (III) Al(OR1)pR23-p; (IV) Mg(OR1)qR22-q; and (V) [Si(OR3)nR43-n]—(X)—[Si(OR5)nR63-n].Type: GrantFiled: July 22, 2016Date of Patent: November 17, 2020Assignee: DAICEL CORPORATIONInventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Patent number: 10007029Abstract: [1] A ?-phellandrene polymer which is a polymerization product of ?-phellandrene. [2] The ?-phellandrene polymer comprising ?-phellandrene units represented by chemical formulae (I-1), (I-2), (II-1) and (II-2), a total amount of the ?-phellandrene units being 50% by mass or more. [3] The ?-phellandrene polymer, which has a number average molecular weight Mn of 40,000 or more. [4] The ?-phellandrene polymer, wherein at least a part of olefinic carbon-carbon double bonds thereof are hydrogenated. [5] The ?-phellandrene polymer, which has a glass transition temperature of 80° C. or more.Type: GrantFiled: October 21, 2014Date of Patent: June 26, 2018Assignees: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, SEKISUI CHEMICAL CO., LTD.Inventors: Masami Kamigaito, Kotaro Satoh, Shinya Suzuki, Yasuyuki Kori, Yuji Eguchi, Koichiro Iwasa, Hitoshi Shirato
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Patent number: 9499638Abstract: The present invention provides: a polysaccharide derivative containing a structure wherein hydrogen atoms in a hydroxyl group at the 2-position and the 3-position of a structure unit of polysaccharide are substituted with different substituents respectively represented by a specific general formula and a separating agent for optical isomers which contains such a polysaccharide derivative. The present invention can provide a novel polysaccharide derivative which has excellent optical isomer separating ability, making it suitable as a separating agent for optical isomers, and can provide a separating agent for optical isomers which contains the polysaccharide derivative.Type: GrantFiled: October 30, 2013Date of Patent: November 22, 2016Assignee: DAICEL CORPORATIONInventors: Yoshio Okamoto, Chiyo Yamamoto, Shunsuke Kondo, Masami Kamigaito
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Publication number: 20160326267Abstract: Provided is a complex obtained by reacting a polymer compound derivative obtained by modifying part of the hydroxy groups or amino groups of a polymer compound having the hydroxy groups or amino groups with a compound represented by the following general formula (I) with one or more kinds of compounds represented by the following general formulae (II) to (V) : (I) A-X—Si (Y)nR3-n; (II) M(OR1)nR24-n; (III) Al (OR1)pR23-p; (IV) Mg (OR1)qR22-q; and (V) [Si (OR3)nR43-n]—(X)—[Si (OR5)nR63-n].Type: ApplicationFiled: July 22, 2016Publication date: November 10, 2016Inventors: Yoshio OKAMOTO, Chiyo YAMAMOTO, Tomoyuki IKAI, Masami KAMIGAITO
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Publication number: 20160223715Abstract: [1] A ?-phellandrene polymer which is a polymerization product of ?-phellandrene. [2] The ?-phellandrene polymer comprising ?-phellandrene units represented by chemical formulae (I-1), (I-2), (II-1) and (II-2), a total amount of the ?-phellandrene units being 50% by mass or more. [3] The ?-phellandrene polymer, which has a number average molecular weight Mn of 40,000 or more. [4] The ?-phellandrene polymer, wherein at least a part of olefinic carbon-carbon double bonds thereof are hydrogenated. [5] The ?-phellandrene polymer, which has a glass transition temperature of 80° C. or more.Type: ApplicationFiled: October 21, 2014Publication date: August 4, 2016Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, SEKISUI CHEMICAL CO., LTD.Inventors: Masami KAMIGAITO, Kotaro SATOH, Shinya SUZUKI, Yasuyuki KORI, Yuji EGUCHI, Koichiro IWASA, Hitoshi SHIRATO
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Publication number: 20140128597Abstract: The present invention provides: a polysaccharide derivative containing a structure wherein hydrogen atoms in a hydroxyl group at the 2-position and the 3-position of a structure unit of polysaccharide are substituted with different substituents respectively represented by a specific general formula; and, a separating agent for optical isomers, which contains such a polysaccharide derivative. The present invention can provide a novel polysaccharide derivative which has excellent optical isomer separating ability, and is thus suitable for a separating agent for optical isomers, and can provide a separating agent for optical isomers which contains the polysaccharide derivative.Type: ApplicationFiled: October 30, 2013Publication date: May 8, 2014Inventors: Yoshio OKAMOTO, Chiyo YAMAMOTO, Shunsuke KONDO, Masami KAMIGAITO
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Publication number: 20120165516Abstract: A filler for optical isomer separation which: allows a polymer compound derivative to be immobilized on the surface of a carrier at a high ratio and is excellent in optical separation ability. The filler is characterized in that the filler is obtained by modifying part of the hydroxy or amino groups of a polymer compound having hydroxy or amino groups with molecules of a compound represented by the following general formula (I): A-X—Si(Y)nR3-n, and is carried by a carrier through chemical bonding.Type: ApplicationFiled: January 17, 2012Publication date: June 28, 2012Inventors: Yoshio OKAMOTO, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Patent number: 8124712Abstract: A filler for optical isomer separation which: allows a polymer compound derivative to be immobilized on the surface of a carrier at a high ratio and is excellent in optical separation ability. The filler is characterized in that the filler is obtained by modifying part of the hydroxy or amino groups of a polymer compound having the hydroxy or amino groups with molecules of a compound represented by the following general formula (I): A-X—Si(Y)nR3-n, and is carried by a carrier through chemical bonding.Type: GrantFiled: May 2, 2007Date of Patent: February 28, 2012Assignees: National University Corporation Nagoya University, Daicel Chemical Industries, Ltd.Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Patent number: 8093344Abstract: To provide a ?-pinene polymer excellent in heat resistance while having thermoplasticity, and further also having excellent strength, without impairing the inherent characteristics of small specific gravity and excellent transparency. A desired ?-pinene polymer having a weight average molecular weight of 90,000 to 1,000,000 and a glass transition temperature of 80° C. or more was obtained by polymerizing ?-pinene in the presence of a bifunctional vinyl compound.Type: GrantFiled: April 1, 2009Date of Patent: January 10, 2012Assignees: Yasuhara Chemical Co., Ltd., Kuraray Co., Ltd., National University Corporation Nagoya UniversityInventors: Masami Kamigaito, Kotaro Satoh, Hiroko Sugiyama
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Patent number: 8053543Abstract: A polymer compound derivative, obtained by modifying part of the hydroxy or amino groups of a polymer compound having the hydroxy or amino groups with molecules of a compound represented by the following general formula (I): A-X—Si(Y)nR3-n (I), where A represents a reactive group which reacts with a hydroxy or amino group, X represents an alkylene group which has 1 to 18 carbon atoms and which may have a branch, or an arylene group which may have a substituent, Y represents a reactive group which reacts with a silanol group to form a siloxane bond, R represents an alkyl group which has 1 to 18 carbon atoms and which may have a branch, or an aryl group which may have a substituent, and n represents an integer of 1 to 3.Type: GrantFiled: May 2, 2007Date of Patent: November 8, 2011Assignees: National University Corporation Nagoya University, Daicel Chemical Industries, Ltd.Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Patent number: 7772382Abstract: Provided is a chitosan derivative having a high optical resolving power. Specifically provided is a chitosan derivative represented by the following Formula (I). wherein R1 represents an aliphatic group or an aromatic group having a carbon number of 1 to 30 which may have a substituent; R2 represents a substituent originating from an isocyanic acid derivative, carboxylic acid, ester, acid halide, acid amide compound, halide compound, aldehyde, or alcohol; and n is an integer of 5 or more.Type: GrantFiled: April 28, 2006Date of Patent: August 10, 2010Assignees: National University Corporation Nagoya University, Daicel Chemical Industries, Ltd.Inventors: Yoshio Okamoto, Chiyo Yamamoto, Masami Kamigaito
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Patent number: 7745616Abstract: There is provided a process for producing beads for enantiomeric isomer resolution with a satisfactory separation efficiency. The beads for enantiomeric isomer resolution include a polysaccharide derivative, in which the polysaccharide derivative has a structure crosslinked at the 6-position hydroxy group of constituent units of the polysaccharide with a crosslinking agent. The process for producing the beads for enantiomeric isomer resolution includes: the step of adding dropwise an organic solvent solution of the polysaccharide derivative to a coagulation bath being stirred to thereby produce beads; the step of taking out the beads and then optionally drying the same after washing; and the step of reacting the beads with a crosslinking agent in an organic solvent to react at least part of the 6-position hydroxy groups in the constituent units of the polysaccharide with the crosslinking agent, thereby obtaining a reaction mixture containing beads having a crosslinked structure.Type: GrantFiled: April 28, 2006Date of Patent: June 29, 2010Assignees: National University Corporation, Nagoya University, Daicel Chemical Industries, Ltd.Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Publication number: 20100099861Abstract: Provided is a complex obtained by reacting a polymer compound derivative obtained by modifying part of hydroxy groups or amino groups of a polymer compound having the hydroxy groups or amino groups with a compound represented by the following general formula (I) with one or more kinds of compounds represented by the following general formulae (II) to (V): (I) A-X—Si(Y)nR3-n (where A, X, Y, R, and n are as defined in claim 1) ; (II) M(OR1)nR24-n; (III) Al(OR1)pR23-p; (IV) Mg(OR1)gR22-q (where M, R1, R2, n, p, and q are as defined in claim 1); and (V) (where R3, R4, R5, and R6 are as defined in claim 1).Type: ApplicationFiled: May 2, 2008Publication date: April 22, 2010Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Publication number: 20090264639Abstract: The present invention provides: a polysaccharide derivative containing a structure wherein hydrogen atoms in a hydroxyl group or amino group at the 2-position and the 3-position of a structure unit of polysaccharide are substituted with different substituents respectively represented by a specific general formula; and, a separating agent for optical isomers, which contains such a polysaccharide derivative. The present invention can provide a novel polysaccharide derivative which has excellent optical isomer separating ability, and is thus suitable for a separating agent for optical isomers, and can provide a separating agent for optical isomers which comprises the polysaccharide derivative.Type: ApplicationFiled: September 4, 2007Publication date: October 22, 2009Inventors: Yoshio Okamoto, Chiyo Yamamoto, Shunsuke Kondo, Masami Kamigaito
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Publication number: 20090209720Abstract: To provide a ?-pinene polymer excellent in heat resistance while having thermoplasticity, and further also having excellent strength, without impairing the inherent characteristics of small specific gravity and excellent transparency. A desired ?-pinene polymer having a weight average molecular weight of 90,000 to 1,000,000 and a glass transition temperature of 80° C. or more was obtained by polymerizing ?-pinene in the presence of a bifunctional vinyl compound.Type: ApplicationFiled: April 1, 2009Publication date: August 20, 2009Applicants: Yasuhara Chemical Co., Ltd., Kuraray Co., Ltd., National University Corporation Nagoya UniversityInventors: Masami Kamigaito, Kotaro Satoh, Hiroko Sugiyama
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Publication number: 20090124798Abstract: A polymer compound derivative, obtained by modifying part of the hydroxy or amino groups of a polymer compound having the hydroxy or amino groups with molecules of a compound represented by the following general formula (I): A-X—Si(Y)nR3-n (I), where A represents a reactive group which reacts with a hydroxy or amino group, X represents an alkylene group which has 1 to 18 carbon atoms and which may have a branch, or an arylene group which may have a substituent, Y represents a reactive group which reacts with a silanol group to form a siloxane bond, R represents an alkyl group which has 1 to 18 carbon atoms and which may have a branch, or an aryl group which may have a substituent, and n represents an integer of 1 to 3.Type: ApplicationFiled: May 2, 2007Publication date: May 14, 2009Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Publication number: 20090105440Abstract: Disclosed is a filler for optical isomer separation which: allows a polymer compound derivative to be immobilized on the surface of a carrier at a high ratio; and is excellent in optical separation ability. The filler is characterized in that the filler is obtained by modifying part of hydroxy or amino groups of a polymer compound having the hydroxy or amino groups with molecules of a compound represented by the following general formula (I): A-X—Si(Y)nR3-n, and is carried by a carrier through chemical bonding.Type: ApplicationFiled: May 2, 2007Publication date: April 23, 2009Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Publication number: 20090068468Abstract: There is provided a process for producing beads for enantiomeric isomer resolution with a satisfactory separation efficiency. The beads for enantiomeric isomer resolution include a polysaccharide derivative, in which the polysaccharide derivative has a structure crosslinked at the 6-position hydroxy group of constituent units of the polysaccharide with a crosslinking agent. The process for producing the beads for enantiomeric isomer resolution includes: the step of adding dropwise an organic solvent solution of the polysaccharide derivative to a coagulation bath being stirred to thereby produce beads; the step of taking out the beads and then optionally drying the same after washing; and the step of reacting the beads with a crosslinking agent in an organic solvent to react at least part of the 6-position hydroxy groups in the constituent units of the polysaccharide with the crosslinking agent, thereby obtaining a reaction mixture containing beads having a crosslinked structure.Type: ApplicationFiled: April 28, 2006Publication date: March 12, 2009Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
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Publication number: 20090062519Abstract: Provided is a chitosan derivative having a high optical resolving power. Specifically provided is a chitosan derivative represented by the following Formula (I). wherein R1 represents an aliphatic group or an aromatic group having a carbon number of 1 to 30 which may have a substituent; R2 represents a substituent originating from an isocyanic acid derivative, carboxylic acid, ester, acid halide, acid amide compound, halide compound, aldehyde, or alcohol; and n is an integer of 5 or more.Type: ApplicationFiled: April 28, 2006Publication date: March 5, 2009Inventors: Yoshio Okamoto, Chiyo Yamamoto, Masami Kamigaito