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).
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Patent number: 11193082Abstract: 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: GrantFiled: March 27, 2019Date of Patent: December 7, 2021Assignee: ENEOS CORPORATIONInventors: Kazuo Tagawa, Fuyuki Aida, Koshi Takahama
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Publication number: 20210032550Abstract: 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: ApplicationFiled: February 21, 2019Publication date: February 4, 2021Applicant: ENEOS CorporationInventors: Kazuo TAGAWA, Fuyuki AIDA, Koshi TAKAHAMA
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Publication number: 20210024849Abstract: 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: ApplicationFiled: March 27, 2019Publication date: January 28, 2021Applicant: ENEOS CorporationInventors: Kazuo TAGAWA, Fuyuki AIDA, Koshi TAKAHAMA
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Patent number: 10894842Abstract: 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: GrantFiled: August 28, 2017Date of Patent: January 19, 2021Assignee: ENEOS CORPORATIONInventors: Fuyuki Aida, Kazuo Tagawa
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Patent number: 10815317Abstract: 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: GrantFiled: February 20, 2017Date of Patent: October 27, 2020Assignee: ENEOS CORPORATIONInventors: Fuyuki Aida, Kazuo Tagawa
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Patent number: 10400047Abstract: 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: GrantFiled: February 25, 2016Date of Patent: September 3, 2019Assignee: JXTG NIPPON OIL & ENERGY CORPORATIONInventors: Fuyuki Aida, Kazuo Tagawa
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Publication number: 20190185593Abstract: 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: ApplicationFiled: August 28, 2017Publication date: June 20, 2019Applicant: JXTG NIPPON OIL & ENERGY CORPORATIONInventors: Fuyuki AIDA, Kazuo TAGAWA
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Publication number: 20190077888Abstract: 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: ApplicationFiled: February 20, 2017Publication date: March 14, 2019Applicant: JXTG NIPPON OIL & ENERGY CORPORATIONInventors: Fuyuki AIDA, Kazuo TAGAWA
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Publication number: 20180051103Abstract: 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: ApplicationFiled: March 16, 2016Publication date: February 22, 2018Applicant: JXTG NIPPON OIL & ENERGY CORPORATIONInventors: Fuyuki AIDA, Kazuo TAGAWA
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Publication number: 20180016367Abstract: 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: ApplicationFiled: February 25, 2016Publication date: January 18, 2018Applicant: JXTG NIPPON OIL & ENERGY CORPORATIONInventors: Fuyuki AIDA, Kazuo TAGAWA
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Patent number: 9783757Abstract: 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: GrantFiled: July 24, 2013Date of Patent: October 10, 2017Assignee: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno
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Publication number: 20160053196Abstract: 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: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Kazuo TAGAWA, Kazuaki HAYASAKA
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Publication number: 20160055934Abstract: 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: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventor: Kazuo TAGAWA
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Publication number: 20150376538Abstract: 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: ApplicationFiled: March 6, 2014Publication date: December 31, 2015Inventors: Yoshitaka MANABE, Kazuo TAGAWA, Ryuichi UENO, Shinji HASEGAWA, Miho FURUKAWA
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Publication number: 20150322370Abstract: 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: ApplicationFiled: July 24, 2013Publication date: November 12, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki MATSUI, Hiroya MIYAMOTO, Hiromitsu MATSUDA, Kazuo TAGAWA, Akira TAKAGI, Ryuichi UENO
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Publication number: 20150203785Abstract: 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: ApplicationFiled: July 24, 2013Publication date: July 23, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi
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Publication number: 20150203782Abstract: 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: ApplicationFiled: July 24, 2013Publication date: July 23, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno
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Publication number: 20150203781Abstract: 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: ApplicationFiled: July 24, 2013Publication date: July 23, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi, Ryuichi Ueno
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Publication number: 20150197705Abstract: 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: ApplicationFiled: July 24, 2013Publication date: July 16, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa
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Publication number: 20150184109Abstract: 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: ApplicationFiled: July 24, 2013Publication date: July 2, 2015Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Hiroya Miyamoto, Hiromitsu Matsuda, Kazuo Tagawa, Akira Takagi