Patents by Inventor Shinichi Kojoh

Shinichi Kojoh 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: 10604643
    Abstract: The pipe articles with excellent stress crack resistance can be achieved by providing ethylene copolymer composition comprises ethylene and a C6-C10 ?-olefin comonomer; the ethylene copolymer having a total density of 0.945-0.980 g/cm3 and a MFR5 of 0.10-0.50 g/10 min; and the ethylene copolymer having a comonomer content of 1-5% wt. The ethylene copolymer has Mx/My in the range of not less than 14.0; gpcBR in the range of from 0.20 to 0.80; and strain hardening modulus <Gp> in the range of not less than 53.4.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: March 31, 2020
    Assignees: SCG Chemicals Co., Ltd., Mitsui Chemicals, Inc.
    Inventors: Natthaporn Suchao-in, Kenji Iwamasa, Eiji Shiba, Warachad Klomkamol, Patcharin Samphawamontri, Watcharee Cheevasrirungruang, Shinichi Kojoh, Yasunori Kaneko, Takashi Fukawa, Thipphaya Pathaweeisariyakul
  • Publication number: 20190248991
    Abstract: The pipe articles with excellent stress crack resistance can be achieved by providing ethylene copolymer composition comprises ethylene and a C6-C10 ?-olefin comonomer; the ethylene copolymer having a total density of 0.945-0.980 g/cm3 and a MFR5 of 0.10-0.50 g/10 min; and the ethylene copolymer having a comonomer content of 1-5% wt. The ethylene copolymer has Mx/My in the range of not less than 14.0; gpcBR in the range of from 0.20 to 0.80; and strain hardening modulus <Gp> in the range of not less than 53.4.
    Type: Application
    Filed: November 15, 2016
    Publication date: August 15, 2019
    Applicants: SCG Chemicals Co., Ltd., Mitsui Chemicals, Inc.
    Inventors: Natthaporn SUCHAO-IN, Kenji IWAMASA, Eiji SHIBA, Warachad KLOMKAMOL, Patcharin SAMPHAWAMONTRI, Watcharee CHEEVASRIRUNGRUANG, Shinichi KOJOH, Yasunori KANEKO, Takashi FUKAWA, Thipphaya PATHAWEEISARIYAKUL
  • Patent number: 8338557
    Abstract: Olefin polymer with narrow molecular weight distribution and specific molecular weight, olefin polymer having functional group introduced at terminal, tapered polymer containing segment wherein monomer composition continuously changes in the polymer chain, olefin polymer having different segments bonded to each other, and process for preparing these polymers. The olefin polymers are polymers of C2-20 carbon atom olefins and have a number-average molecular weight of ?500 and Mw/Mn of ?1.5. In syntheses, an olefin of 2-20 carbon atoms is polymerized in the presence of a catalyst comprising a transition metal compound represented by the formula LmMXn wherein M is a transition metal atom of Group 3-11, m is 1-5, n is a number satisfying a valence of M, L is a ligand—coordinated to the central metal M—which contains a heteroatom having no direct bond to the central metal, and X is e.g. halogen or a hydrocarbon.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: December 25, 2012
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
  • Publication number: 20110196103
    Abstract: An olefin polymerization catalyst having (A) a transition metal compound (2a) or (3a) and (B) at least one compound selected from (B-1) an organometallic compound, (B-2) an organoaluminum oxy compound and (B-3) a compound capable of forming an ion pair by reacting with the transition metal compound (A).
    Type: Application
    Filed: April 22, 2011
    Publication date: August 11, 2011
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Nobuo Kawahara, Shinichi Kojoh, Norio Kashiwa
  • Patent number: 7868097
    Abstract: A hybrid polymer has a structure in which a polyolefin segment and a polar polymer segment are connected not via a bonding group containing a heteroatom. A method of the invention produces the hybrid polymer with industrial advantages. The hybrid polymer includes a polyolefin segment (A) and a polar polymer segment (B), the polar polymer segment being obtained by radical polymerization of a radically polymerizable monomer.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: January 11, 2011
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hideyuki Kaneko, Shinichi Kojoh, Nobuo Kawahara, Shingo Matsuo, Tomoaki Matsugi, Norio Kashiwa
  • Patent number: 7847021
    Abstract: A modified polyolefin resin comprising a copolymer having a structure that a propylene-based polyolefin segment (a) and a segment (b) containing a lactic acid as a constituent are bonded in a block state and/or a graft state through a vinyl monomer having a hydroxyl group, wherein a number average molecular weight of the propylene-based polyolefin segment (a) is from 1,000 to 100,000, a number average molecular weight of the segment (b) containing lactic acid as a constituent is from 1,000 to 200,000, and a weight composition of the propylene-based polyolefin segment (a) and the segment (b) containing lactic acid as a constituent is from 10/90 to 90/10. The modified polyolefin resin can be used in a resin composition containing an aliphatic polyester resin (A), a polyolefin resin (B) and the modified polyolefin resin (C). The composition can exhibit excellent heat resistance and impact resistance and can be used for molding various parts.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: December 7, 2010
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hosei Shinoda, Takeshi Kashima, Masahiro Enna, Shinichi Kojoh, Hideyuki Kaneko, Shingo Matsuo, Nobuo Kawahara, Tomoaki Matsugi, Yuichi Matsuda, Takayuki Onogi, Fumio Kageyama
  • Patent number: 7803888
    Abstract: A novel olefin-based polymer has excellent thermal resistance, as well as excellent balance among various properties. The olefin-based polymer is an olefin-based polymer comprising 50 to 100% by weight of a constituent unit derived from 4-methyl-1-pentene, and 0 to 50% by weight of a constituent unit derived from at least one olefin selected from olefins having 2 to 20 carbon atoms except 4-methyl-1-pentene, and having the following properties: i) the diad isotacticity is 70% or greater, ii) the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) as measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5, and iii) the intrinsic viscosity [?] is 0.5 (dl/g) or greater.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: September 28, 2010
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Nobuo Kawahara, Shinichi Kojoh, Shingo Matsuo, Hideyuki Kaneko, Tomoaki Matsugi, Norio Kashiwa, Munehito Funaya, Naritoshi Hirota, Tooru Tanaka, Toshiyuki Hirose, Nobuhisa Mikawa, Kouichi Kizu, Keiji Okada
  • Patent number: 7592403
    Abstract: The present invention provides ethylene polymers capable of preparing various molded articles such as films, sheets or the like, and having excellent moldability, particularly excellent high-speed moldability. The ethylene polymers of the present invention have a density and molecular weight distribution in specific ranges. The first ethylene polymer is characterized by having (C) a ratio (MFR10/MFR2) of a melt flow rate (MFR10) at 190° C. under a load of 10 Kg to a melt flow rate (MFR2) at 190° C. under a load of 2.16 Kg of from 16.2 to 50. The second ethylene polymer is characterized by having (C) a ratio (MFR10/MFR2) from 12 to 50. The third ethylene polymer is characterized by having (D) a relation of ?2/?1?18 where ?1 and ?2 denote angular velocity (rad/sec) when complex elastic modulus G* (dyne/cm2) at 200° C. is 5.0×105 dyne/cm2 and 2.0×106 dyne/cm2, respectively, which are determined by measurement of the angular velocity dependence of the complex elastic modulus of the copolymer.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: September 22, 2009
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Norio Kashiwa, Shingo Matsuo, Shinichi Kojoh, Mamoru Takahashi
  • Patent number: 7566761
    Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: July 28, 2009
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Makoto Mitani, Yasunori Yoshida, Junichi Mohri, Kazutaka Tsuru, Seiichi Ishii, Shinichi Kojoh, Tomoaki Matsugi, Junji Saito, Naoto Matsukawa, Shigekazu Matsui, Takashi Nakano, Hidetsugu Tanaka, Norio Kashiwa, Terunori Fujita
  • Publication number: 20090186985
    Abstract: The present invention relates to olefinic compositions comprising a functionalized branched olefin copolymer containing functionalized sidechains derived from olefin and at least one chain end nucleophilic heteroatom containing functional group with at least one protic hydrogen, optionally with one or more copolymerizable monomers, the copolymer characterized by having A) a Tg<?10° C. as measured by DSC; B) a Ta>100° C.; C) an elongation at break of greater than or equal to 500 percent; D) a Tensile Strength of greater than or equal to 1,500 psi (10,300 kPa) at 25° C.; E) a TMA temperature>80° C., and F) an elastic recovery of greater than or equal to 50 percent.
    Type: Application
    Filed: January 21, 2005
    Publication date: July 23, 2009
    Inventors: Roger L. Kuhlman, Timothy T. Wenzel, Yunwa W. Cheung, Phillip D. Hustad, Edmund M. Carnahan, John R. Briggs, Brian A. Jazdzewski, Wenbin Liang, Roji Mori, Kouichi Kizu, Nobuo Kawahara, Shingo Matuso, Shinichi Kojoh, Norio Kashiwa
  • Publication number: 20090124760
    Abstract: It is an object to provide a new polyolefin hybrid polymer composed of a polyolefin segment and a polar polymer segment (Z) and a method for manufacturing the hybrid polymer by an industrially advantageous procedure. A polyolefin hybrid polymer composed of a polyolefin segment and a polar polymer segment (Z), wherein the polyolefin hybrid polymer is a modified compound of maleic polyolefin (A), is characterized by comprising a constitutional unit represented by the general formula (I): wherein Z represents a polar polymer segment obtained by polymerizing monomers of at least one kind selected from organic compounds having at least one carbon-carbon unsaturated bond, and F represents a group including an unsaturated bond.
    Type: Application
    Filed: July 11, 2006
    Publication date: May 14, 2009
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Hideyuki Kaneko, Shinichi Kojoh, Nobuo Kawahara, Shingo Matsuo, Tomoaki Matsugi, Norio Kashiwa
  • Publication number: 20090118426
    Abstract: The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5.
    Type: Application
    Filed: December 1, 2008
    Publication date: May 7, 2009
    Inventors: Makoto MITANI, Yasunori YOSHIDA, Junichi MOHRI, Kazutaka TSURU, Seiichi ISHII, Shinichi KOJOH, Tomoaki MATSUGI, Junji SAITO, Naoto MATSUKAWA, Shigekazu MATSUI, Takashi NAKANO, Hidetsugu TANAKA, Norio KASHIWA, Terunori FUJITA
  • Publication number: 20090076233
    Abstract: A novel hybrid polymer has a structure in which a polyolefin segment and a polar polymer segment are connected not via a bonding group containing a heteroatom. A method of the invention produces the hybrid polymer with industrial advantages. The hybrid polymer includes a polyolefin segment (A) and a polar polymer segment (B), the polar polymer segment being obtained by radical polymerization of a radically polymerizable monomer.
    Type: Application
    Filed: February 21, 2006
    Publication date: March 19, 2009
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Hideyuki Kaneko, Shinichi Kojoh, Nobuo Kawahara, Shingo Matsuo, Tomoaki Matsugi, Norio Kashiwa
  • Publication number: 20090043050
    Abstract: A polypropylene composition containing a propylene/1-butene random copolymer which contains 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75° C. and a crystallization rate at 45° C. of 10 minutes or less, and satisfying the following relation, 146 exp (?0.022M)?Tm?125 exp (?0.032M), and an olefin catalyst for preparation thereof.
    Type: Application
    Filed: August 4, 2008
    Publication date: February 12, 2009
    Inventors: Shigenobu Ikenaga, Keiji Okada, Hiroshi Hoya, Norihide Inoue, Naritoshi Hirota, Hiromu Kaneyoshi, Munehito Funaya, Koji Kawai, Nobuo Kawahara, Shinichi Kojoh, Norio Kashiwa, Ryoji Mori
  • Patent number: 7488789
    Abstract: A propylene/1-butene random copolymer containing 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75° C. and a crystallization rate at 45° C. of 10 minutes or less, and satisfying the following relation, 146 exp (?0.022M)?Tm?125 exp (?0.032M), and an olefin catalyst for preparation thereof.
    Type: Grant
    Filed: December 26, 2003
    Date of Patent: February 10, 2009
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Shigenobu Ikenaga, Keiji Okada, Hiroshi Hoya, Norihide Inoue, Naritoshi Hirota, Hiromu Kaneyoshi, Munehito Funaya, Koji Kawai, Nobuo Kawahara, Shinichi Kojoh, Norio Kashiwa, Ryoji Mori
  • Publication number: 20080312461
    Abstract: A transition metal compound represented by the following formula (2a):
    Type: Application
    Filed: August 4, 2008
    Publication date: December 18, 2008
    Inventors: Shigenobu Ikenaga, Keiji Okada, Hiroshi Takayasu, Norihide Inoue, Naritoshi Hirota, Hiromu Kaneyoshi, Munehito Funaya, Koji Kwawi, Nobuo Kawahara, Shinichi Kojoh, Norio Kashiwa, Ryoji Mori
  • Publication number: 20080306219
    Abstract: An olefin polymerization catalyst having (A) a transition metal compound (2a) or (3a) and (B) at least one compound selected from (B-1) an organometallic compound, (B-2) an organoaluminum oxy compound and (B-3) a compound capable of forming an ion pair by reacting with the transition metal compound (A).
    Type: Application
    Filed: August 4, 2008
    Publication date: December 11, 2008
    Inventors: Shigenobu IKENAGA, Keiji OKADA, Hiroshi TAKAYASU, Norihide INOUE, Naritoshi HIROTA, Hiromu KANEYOSHI, Munehito FUNAYA, Koji KAWAI, Nobuo KAWAHARA, Shinichi KOJOH, Norio KASHIWA, Ryoji MORI
  • Publication number: 20080306234
    Abstract: A propylene elastomer (PBER) comprising (a) 50 to 85 mol % of units derived from propylene, (b) 5 to 25 mol % of units derived from 1-butene and (c) 10 to 25 mol % of units derived from ethylene, and having a molar ratio of propylene content to ethylene content of from 89/11 to 70/30, and a modulus in tension (YM), as measured in accordance with JIS 6301, of not more than 40 Mpa.
    Type: Application
    Filed: August 4, 2008
    Publication date: December 11, 2008
    Inventors: Shigenobu Ikenaga, Keiji Okada, Hiroshi Takayasu, Norihide Inoue, Naritoshi Hirota, Hiromu Kaneyoshi, Munehito Funaya, Koji Kawai, Nobuo Kawahara, Shinichi Kojoh, Norio Kashiwa, Ryoji Mori
  • Publication number: 20080292896
    Abstract: A polypropylene composite film having a propylene/1-butene random copolymer which has 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75° C. and a crystallization rate at 45° C. of 10 minutes or less, and satisfying the following relation, 146 exp (?0.022M)?Tm ?125 exp (?0.032M), and an olefin catalyst for preparation thereof.
    Type: Application
    Filed: August 4, 2008
    Publication date: November 27, 2008
    Inventors: Shigenobu Ikenaga, Keiji Okada, Hiroshi Takayasu, Norihide Inoue, Naritoshi Hirota, Hiromu Kaneyoshi, Munehito Funaya, Koji Kawai, Nobuo Kawahara, Shinichi Kojoh, Norio Kashiwa, Ryoji Mori
  • Publication number: 20080281046
    Abstract: Disclosed is a propylene based resin composition comprising 1 to 99% by weight of a specific propylene based polymer (A) and 99 to 1% by weight of an olefin based block copolymer (B) comprising specific polymer segments (B1), (B1?) and (B2) (wherein the total amount of the propylene based polymer (A) and the olefin based block copolymer (B) is 100% by weight).
    Type: Application
    Filed: August 22, 2006
    Publication date: November 13, 2008
    Inventors: Ryoji Mori, Kouichi Kizu, Tomoaki Matsugi, Shinichi Kojoh
  • Patent number: 5220471
    Abstract: A thin film magnetic head comprises a slider and a reading/writing element attached to an end surface of the slider, wherein the reading/writing element is disposed at an end surface in the longitudinal direction of the slider when the longitudinal direction and the width direction are determined on the surface which faces a magnetic recording medium, of the slider, and the slider has a linear groove in the surface opposite the surface which faces the magnetic recording medium, at the intermediate portion in the width direction of the slider and along the longitudinal direction.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: June 15, 1993
    Assignee: TDK Corporation
    Inventor: Mikio Matsuzaki