Patents by Inventor Kazuo Tagawa

Kazuo Tagawa 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).

  • Publication number: 20210032550
    Abstract: A method for producing a wax isomerized oil, comprising a step of providing an ethylene polymer wax, a step of hydrocracking the ethylene polymer wax by a hydrocracking catalyst to obtain a cracked product, and a step of isomerization dewaxing the cracked product by a hydroisomerization catalyst to obtain a wax isomerized oil.
    Type: Application
    Filed: February 21, 2019
    Publication date: February 4, 2021
    Applicant: ENEOS Corporation
    Inventors: Kazuo TAGAWA, Fuyuki AIDA, Koshi TAKAHAMA
  • Publication number: 20210024849
    Abstract: The present invention provides a wax isomerized oil, wherein a content of a hydrocarbon compound having an even number of carbon atoms, as determined from a chromatogram obtained by mass spectrometry, is more than 50% by mass based on a total amount of the wax isomerized oil.
    Type: Application
    Filed: March 27, 2019
    Publication date: January 28, 2021
    Applicant: ENEOS Corporation
    Inventors: Kazuo TAGAWA, Fuyuki AIDA, Koshi TAKAHAMA
  • Patent number: 10894842
    Abstract: A method for producing an oligomer, the method comprising a step of oligomerizing a polymerizable monomer comprising an olefin in the presence of a catalyst comprising an iron complex represented by the following Formula (1) and trialkylaluminum: [In Formula (1), R represents a hydrocarbyl group having 1 to 6 carbon atoms or an aromatic group having 6 to 12 carbon atoms, a plurality of R in the same molecule may be the same or different, R? represents a free radical having an oxygen atom and/or a nitrogen atom, a plurality of R? in the same molecule may be the same or different, and Y represents a chlorine atom or a bromine atom].
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: January 19, 2021
    Assignee: ENEOS CORPORATION
    Inventors: Fuyuki Aida, Kazuo Tagawa
  • Patent number: 10815317
    Abstract: The present invention provides a method for preparing an oligomer and a catalyst comprising a step of oligomerizing a polymerizable monomer containing an olefin in the presence of a catalyst, which comprises (A) a complex of a diimine compound and at least one metal selected from the group consisting of Group 8 elements, Group 9 elements and Group 10 elements, (B) a mixture of a pyridine diimine compound and an iron salt and/or an iron complex, (C) methylaluminoxane and/or a boron compound, and (D) an organoaluminum compound other than methylaluminoxane and/or an organozinc compound. The components (A), (B), (C) and (D) described above are respectively as defined in the present Description.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: October 27, 2020
    Assignee: ENEOS CORPORATION
    Inventors: Fuyuki Aida, Kazuo Tagawa
  • Patent number: 10400047
    Abstract: An olefin polymerization catalyst containing a complex of a ligand being a diimine compound represented by the formula (1) and at least one metal selected from the group consisting of Group 8 elements, Group 9 elements and Group 10 elements: wherein Ar1 and Ar2 are respectively a group represented by the formula (2): wherein R1 and R5 are respectively a hydrogen atom or a hydrocarbyl group having 1 to 5 carbon atoms, the total number of carbon atoms of R1 and R5 is 1 or more and 5 or less, and R2, R3 and R4 are respectively a hydrogen atom or an electron-donating group.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: September 3, 2019
    Assignee: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Fuyuki Aida, Kazuo Tagawa
  • Publication number: 20190185593
    Abstract: A method for producing an oligomer, the method comprising a step of oligomerizing a polymerizable monomer comprising an olefin in the presence of a catalyst comprising an iron complex represented by the following Formula (1) and trialkylaluminum: [In Formula (1), R represents a hydrocarbyl group having 1 to 6 carbon atoms or an aromatic group having 6 to 12 carbon atoms, a plurality of R in the same molecule may be the same or different, R? represents a free radical having an oxygen atom and/or a nitrogen atom, a plurality of R? in the same molecule may be the same or different, and Y represents a chlorine atom or a bromine atom].
    Type: Application
    Filed: August 28, 2017
    Publication date: June 20, 2019
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Fuyuki AIDA, Kazuo TAGAWA
  • Publication number: 20190077888
    Abstract: The present invention provides a method for preparing an oligomer and a catalyst comprising a step of oligomerizing a polymerizable monomer containing an olefin in the presence of a catalyst, which comprises (A) a complex of a diimine compound and at least one metal selected from the group consisting of Group 8 elements, Group 9 elements and Group 10 elements, (B) a mixture of a pyridine diimine compound and an iron salt and/or an iron complex, (C) methylaluminoxane and/or a boron compound, and (D) an organoaluminum compound other than methylaluminoxane and/or an organozinc compound. The components (A), (B), (C) and (D) described above are respectively as defined in the present Description.
    Type: Application
    Filed: February 20, 2017
    Publication date: March 14, 2019
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Fuyuki AIDA, Kazuo TAGAWA
  • Publication number: 20180051103
    Abstract: An oligomer production method and a catalyst, the method comprising a step of co-oligomerizing a polymerizable monomer including ethylene and an ?-olefin in the presence of a catalyst containing (A) a compound represented by a formula (1), (B) a compound represented by a formula (2), (C) methylaluminoxane and/or a boron compound and (D) an organozine compound and/or an organoaluminun compound other than methylaluminoxane, and an oligomer production method and a catalyst comprising a step of oligomerizing a polymerizable monomer including an olefin in the presence of a catalyst containing a complex of a ligand being a diimine compound represented by a formula (3) and a metal of Group 8 elements, etc.
    Type: Application
    Filed: March 16, 2016
    Publication date: February 22, 2018
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Fuyuki AIDA, Kazuo TAGAWA
  • Publication number: 20180016367
    Abstract: An olefin polymerization catalyst containing a complex of a ligand being a diimine compound represented by the formula (1) and at least one metal selected from the group consisting of Group 8 elements, Group 9 elements and Group 10 elements: wherein Ar1 and Ar2 are respectively a group represented by the formula (2): wherein R1 and R5 are respectively a hydrogen atom or a hydrocarbyl group having 1 to 5 carbon atoms, the total number of carbon atoms of R1 and R3 is 1 or more and 5 or less, and R2, R3 and R4 are respectively a hydrogen atom or an electron-donating group.
    Type: Application
    Filed: February 25, 2016
    Publication date: January 18, 2018
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Fuyuki AIDA, Kazuo TAGAWA
  • Patent number: 9783757
    Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by the following formula (1), and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a C1 to C36 alkyl group.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: October 10, 2017
    Assignee: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno
  • Publication number: 20160053196
    Abstract: Disclosed is a lubricating oil composition comprising: a lubricating base oil having a kinematic viscosity at 100° C. of 3.5 to 4.5 mm2/s, a viscosity index of 145 or greater, and an urea adduct value of 2 to 7% by mass; and a poly(meth)acrylate pour-point depressant containing structural units represented by the formula (1): wherein R1 represents a hydrogen atom and the like, R2 represents an alkyl group; based on the total amount of the units contained in the depressant, a ratio of the units wherein the R2 is a methyl group is 0 to 10 mol %, a ratio of the units wherein the R2 is an alkyl group having 12C or greater is 90 to 100 mol %; the alkyl group having 12C or greater has an average number of 13-16C; the depressant has a weight-average molecular weight of 10,000 to 200,000.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 25, 2016
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Kazuo TAGAWA, Kazuaki HAYASAKA
  • Publication number: 20160055934
    Abstract: Disclosed is a method for producing a lubricating base oil. The method comprises subjecting a synthetic wax obtained by a gas-to-liquid process, or a lubricating-oil fraction separated from the synthetic wax, to hydrocracking, thereby obtaining a hydrocracked oil having a normal paraffin content of 30% or greater and 50% or less; and subjecting the hydrocracked oil to hydroisomerization dewaxing in the presence of a hydroisomerization catalyst, wherein the lubricating base oil has a volume resistivity at 80° C. of 1 T?·m or greater, and a volume resistivity at 25° C. relative to the volume resistivity at 80° C. that satisfies conditions represented by the following formula (1): B(25° C.)/A(80° C.)?1.5 wherein in formula (1), A (80° C.) indicates the volume resistivity at 80° C. of the lubricating base oil, and B (25° C.) indicates the volume resistivity at 25° C. of the lubricating base oil.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 25, 2016
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventor: Kazuo TAGAWA
  • Publication number: 20150376538
    Abstract: Provided is a compound which can increase all of the shudder prevention lifetime, transmission characteristic and transmission torque capacity to satisfactory levels when contained in a lubricating oil. Provided are a succinimide compound represented by the following general formula (1), and a friction modifier and a lubricating oil composition containing the succinimide compound. (In the formula (1), R represents a hydrocarbyl group having 8 to 30 carbon atoms; and n represents an integer of 1 to 7.
    Type: Application
    Filed: March 6, 2014
    Publication date: December 31, 2015
    Inventors: Yoshitaka MANABE, Kazuo TAGAWA, Ryuichi UENO, Shinji HASEGAWA, Miho FURUKAWA
  • Publication number: 20150322370
    Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion, and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by formula (1) and a structural unit represented by formula (2) and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a group represented by formula (3), and R3 represents a C1 to C18 alkyl group that is straight-chain or has a branch having 5 or less carbon atoms: m and n are integers which satisfy m?5, n?4, and m+n?31.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 12, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki MATSUI, Hiroya MIYAMOTO, Hiromitsu MATSUDA, Kazuo TAGAWA, Akira TAKAGI, Ryuichi UENO
  • Publication number: 20150203785
    Abstract: A lubricating oil composition comprising a lubricating base oil having a kinematic viscosity at 100° C. of 1 to 10 mm2/s, and a poly(meth)acrylate viscosity index improver containing a structural unit represented by the formula (1) in a proportion of 30 to 90 mol % and having a hydrocarbon main chain ratio of 0.18 or less: wherein R1 represents hydrogen or a methyl group, and R2 represents a linear or branched hydrocarbon group having a carbon number of 6 or less.
    Type: Application
    Filed: July 24, 2013
    Publication date: July 23, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi
  • Publication number: 20150203781
    Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by the following formula (1), and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a C1 to C36 alkyl group.
    Type: Application
    Filed: July 24, 2013
    Publication date: July 23, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno
  • Publication number: 20150203782
    Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a polymer chain comprising a structural unit represented by the following formula (1), wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less. [In the formula (1), R1 represents hydrogen or a methyl group, and R2 represents a C1 to C36 alkyl group.
    Type: Application
    Filed: July 24, 2013
    Publication date: July 23, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno
  • Publication number: 20150197705
    Abstract: An engine oil composition comprising: a lubricating base oil having a kinematic viscosity at 100° C. of 1 to 5 mm2/s; a poly(meth)acrylate viscosity index improver containing a structural unit represented by the formula (1) in a proportion of 30 to 90 mol % and having a PSSI in an ultrasonic shear test of 15 or less; and a friction modifier, the engine oil composition has a kinematic viscosity at 100° C. of 4 to 8 mm2/s, and an HTHS viscosity at 150° C. of less than 2.
    Type: Application
    Filed: July 24, 2013
    Publication date: July 16, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa
  • Publication number: 20150184109
    Abstract: A lubricating oil composition comprising a lubricating base oil having a kinematic viscosity at 100° C. of 1 to 10 mm2/s, and a branched poly(meth)acrylate viscosity index improver containing a structural unit represented by the following formula (1) in the proportion of 30 to 90 mol % and having a branching degree of 0.1 to 8.0: wherein R1 represents hydrogen or a methyl group, and R2 represents a linear or branched hydrocarbon group having a carbon number of 6 or less.
    Type: Application
    Filed: July 24, 2013
    Publication date: July 2, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi
  • Publication number: 20150175926
    Abstract: The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a polymer chain comprising a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2), wherein Mw is 100000 or more, and Mw/Mn, is 1.6 or less. [R1 represents hydrogen or a methyl group, and R2 represents a group represented by the following formula (3), and R3 represents a C1 to C18 alkyl group that is straight-chain or has a branch having 5 or less carbon atoms. m and n are integers which satisfy m?5, n?4, and m+n?31.
    Type: Application
    Filed: July 24, 2013
    Publication date: June 25, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno