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).

  • Patent number: 10836834
    Abstract: 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: Grant
    Filed: July 22, 2016
    Date of Patent: November 17, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Patent number: 10007029
    Abstract: [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: Grant
    Filed: October 21, 2014
    Date of Patent: June 26, 2018
    Assignees: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, SEKISUI CHEMICAL CO., LTD.
    Inventors: Masami Kamigaito, Kotaro Satoh, Shinya Suzuki, Yasuyuki Kori, Yuji Eguchi, Koichiro Iwasa, Hitoshi Shirato
  • Patent number: 9499638
    Abstract: 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: Grant
    Filed: October 30, 2013
    Date of Patent: November 22, 2016
    Assignee: DAICEL CORPORATION
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Shunsuke Kondo, Masami Kamigaito
  • Publication number: 20160326267
    Abstract: 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: Application
    Filed: July 22, 2016
    Publication date: November 10, 2016
    Inventors: Yoshio OKAMOTO, Chiyo YAMAMOTO, Tomoyuki IKAI, Masami KAMIGAITO
  • Publication number: 20160223715
    Abstract: [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: Application
    Filed: October 21, 2014
    Publication date: August 4, 2016
    Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, SEKISUI CHEMICAL CO., LTD.
    Inventors: Masami KAMIGAITO, Kotaro SATOH, Shinya SUZUKI, Yasuyuki KORI, Yuji EGUCHI, Koichiro IWASA, Hitoshi SHIRATO
  • Publication number: 20140128597
    Abstract: 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: Application
    Filed: October 30, 2013
    Publication date: May 8, 2014
    Inventors: Yoshio OKAMOTO, Chiyo YAMAMOTO, Shunsuke KONDO, Masami KAMIGAITO
  • Publication number: 20120165516
    Abstract: 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: Application
    Filed: January 17, 2012
    Publication date: June 28, 2012
    Inventors: Yoshio OKAMOTO, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Patent number: 8124712
    Abstract: 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: Grant
    Filed: May 2, 2007
    Date of Patent: February 28, 2012
    Assignees: National University Corporation Nagoya University, Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Patent number: 8093344
    Abstract: 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: Grant
    Filed: April 1, 2009
    Date of Patent: January 10, 2012
    Assignees: Yasuhara Chemical Co., Ltd., Kuraray Co., Ltd., National University Corporation Nagoya University
    Inventors: Masami Kamigaito, Kotaro Satoh, Hiroko Sugiyama
  • Patent number: 8053543
    Abstract: 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: Grant
    Filed: May 2, 2007
    Date of Patent: November 8, 2011
    Assignees: National University Corporation Nagoya University, Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Patent number: 7772382
    Abstract: 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: Grant
    Filed: April 28, 2006
    Date of Patent: August 10, 2010
    Assignees: National University Corporation Nagoya University, Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Masami Kamigaito
  • Patent number: 7745616
    Abstract: 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: Grant
    Filed: April 28, 2006
    Date of Patent: June 29, 2010
    Assignees: National University Corporation, Nagoya University, Daicel Chemical Industries, Ltd.
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Publication number: 20100099861
    Abstract: 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: Application
    Filed: May 2, 2008
    Publication date: April 22, 2010
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Publication number: 20090264639
    Abstract: 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: Application
    Filed: September 4, 2007
    Publication date: October 22, 2009
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Shunsuke Kondo, Masami Kamigaito
  • Publication number: 20090209720
    Abstract: 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: Application
    Filed: April 1, 2009
    Publication date: August 20, 2009
    Applicants: Yasuhara Chemical Co., Ltd., Kuraray Co., Ltd., National University Corporation Nagoya University
    Inventors: Masami Kamigaito, Kotaro Satoh, Hiroko Sugiyama
  • Publication number: 20090124798
    Abstract: 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: Application
    Filed: May 2, 2007
    Publication date: May 14, 2009
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Publication number: 20090105440
    Abstract: 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: Application
    Filed: May 2, 2007
    Publication date: April 23, 2009
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Publication number: 20090068468
    Abstract: 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: Application
    Filed: April 28, 2006
    Publication date: March 12, 2009
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Publication number: 20090062519
    Abstract: 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: Application
    Filed: April 28, 2006
    Publication date: March 5, 2009
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Masami Kamigaito