Patents by Inventor Fumito Takeuchi

Fumito Takeuchi 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: 20250388767
    Abstract: A method for producing a varnish-like cyclic olefin-based copolymer composition including a cyclic olefin-based copolymer and an organic solvent, the cyclic olefin-based copolymer including one or more repeating units derived from an olefin, one or more repeating units derived from a cyclic non-conjugated diene, and one or more repeating units derived from a cyclic olefin, the method includes a step of copolymerizing an olefin, a cyclic non-conjugated diene, and a cyclic olefin in a presence of a catalyst containing a transition metal compound and a compound, the transition metal compound contains one or two or more selected from the group consisting of a transition metal compound and a transition metal compound, and the compound contains one or two or more selected from the group consisting of an organic metal compound, an organic aluminum oxy compound, and a compound that reacts with the transition metal compound to form an ion pair.
    Type: Application
    Filed: June 23, 2023
    Publication date: December 25, 2025
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Manami UENO, Kazuoki NAKAI, Fumito TAKEUCHI, Koutarou ASAHINA
  • Patent number: 12378377
    Abstract: A cyclic olefin-based copolymer resin composition includes a cyclic olefin-based copolymer (M); and a maleimide compound (L), in which the cyclic olefin-based copolymer (M) includes a cyclic olefin-based copolymer (m) including a repeating unit represented by a specific general formula, the maleimide compound (L) has a solubility parameter (SP value) obtained by Fedors method of 19 J1/2/cm3/2 or more and 26 J1/2/cm3/2 or less and includes a maleimide compound (l), which is a bismaleimide compound having at least two maleimide groups in a molecule, and when a total of the cyclic olefin-based copolymer (M) and the maleimide compound (L) is 100 parts by mass, a content of the maleimide compound (L) is 1 part by mass or more and 50 parts by mass or less.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: August 5, 2025
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Hirohiko Murase, Koutarou Asahina, Fumito Takeuchi
  • Publication number: 20250215125
    Abstract: A cyclic olefin-based resin composition contains a cyclic olefin-based copolymer (A), an azo compound (B) which has an azo group in a molecule and includes no heteroatom other than a nitrogen atom constituting the azo group, and a hindered phenol compound (C), in which an iodine value of the cyclic olefin-based copolymer (A) is in a range of equal to or more than 20 g/100 g and equal to or less than 120 g/100 g, and a number-average molecular weight Mn of the cyclic olefin-based copolymer (A) is in a range of equal to or more than 3,000 and equal to or less than 30,000.
    Type: Application
    Filed: March 27, 2023
    Publication date: July 3, 2025
    Applicants: MITSUI CHEMICALS, INC., PANASONIC HOLDINGS CORPORATION
    Inventors: Hirohiko MURASE, Koutarou ASAHINA, Manami UENO, Fumito TAKEUCHI, Yuki KITAI, Ryusei KOZAWA
  • Publication number: 20250129193
    Abstract: A cyclic olefin-based copolymer including: (A) structural units (A) derived from one or more olefins represented by General Formula (I), (B) structural units (B) derived from one or more cyclic non-conjugated dienes represented by General Formula (II), and (C) structural units (C) derived from one or more cyclic olefins represented by General Formula (III).
    Type: Application
    Filed: February 1, 2023
    Publication date: April 24, 2025
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Manami UENO, Hirohiko MURASE, Fumito TAKEUCHI
  • Publication number: 20240025109
    Abstract: The present invention provides a method of producing a modeled object by material extrusion using a 3D printer, the 3D printer including a modeling stage having a placement surface for placing the modeled object thereon, the method including: forming at least one first modeling layer on a surface of a modeling sheet disposed on the placement surface, using a molten product of a first modeling layer material; and forming at least one second modeling layer on the at least one first modeling layer, using a molten product of a second modeling layer material, wherein the first modeling layer material is different from the second modeling layer material.
    Type: Application
    Filed: November 24, 2021
    Publication date: January 25, 2024
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Yuki KONDO, Fumito TAKEUCHI, Mikiko MIYATA
  • Patent number: 11760819
    Abstract: The purpose of the present invention is to obtain an ethylene??-olefin?non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene??-olefin?non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an ?-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4) 125° C. is 5-100, and (4) the B value is 1.20 or more.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: September 19, 2023
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koji Endo, Mayumi Hiwara, Sadahiko Matsuura, Yusuke Mizobuchi, Yuichi Yamamura, Yuji Noguchi, Yuji Ishii, Tatsuya Sakai, Keisuke Shishido, Kotaro Ichino, Kiyohide Inomata, Fumito Takeuchi, Kenta Ide
  • Patent number: 11613595
    Abstract: The purpose of the present invention is to obtain an ethylene??-olefin?non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene??-olefin?non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an ?-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4)125° C. is 5-100, and (4) the B value is 1.20 or more.
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: March 28, 2023
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koji Endo, Mayumi Hiwara, Sadahiko Matsuura, Yusuke Mizobuchi, Yuichi Yamamura, Yuji Noguchi, Yuji Ishii, Tatsuya Sakai, Keisuke Shishido, Kotaro Ichino, Kiyohide Inomata, Fumito Takeuchi, Kenta Ide
  • Publication number: 20230059817
    Abstract: A cyclic olefin copolymer includes one or more olefin-derived constituent units (A) represented by General Formula (I), one or more cyclic olefin-derived constituent units (C) represented by General Formula (II), one or more cyclic non-conjugated diene-derived constituent units (B) represented by General Formula (III), and one or more cyclic olefin-derived constituent units (D) represented by General Formula (V), in which, when a total number of moles of the constituent units in the cyclic olefin copolymer is 100 mol %, a content of the constituent unit (C) is 5 mol % or more and 40 mol % or less.
    Type: Application
    Filed: January 20, 2021
    Publication date: February 23, 2023
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kazuoki NAKAI, Hirohiko MURASE, Fumito TAKEUCHI
  • Publication number: 20220340742
    Abstract: A material for 3D printing includes a thermoplastic resin, a thermoplastic elastomer, and a filler. The filler includes talc. A content of the filler is 5% by mass or more and 70% by mass or less with respect to a total mass of the material for 3D printing.
    Type: Application
    Filed: September 23, 2020
    Publication date: October 27, 2022
    Applicants: MITSUI CHEMICALS, INC., PRIME POLYMER CO., LTD.
    Inventors: Yuki KONDO, Tomoaki ITO, Fumito TAKEUCHI, Pingfan CHEN
  • Publication number: 20220275135
    Abstract: A cyclic olefin-based copolymer resin composition includes a cyclic olefin-based copolymer (M); and a maleimide compound (L), in which the cyclic olefin-based copolymer (M) includes a cyclic olefin-based copolymer (m) including a repeating unit represented by a specific general formula, the maleimide compound (L) has a solubility parameter (SP value) obtained by Fedors method of 19J1/2/cm3/2 or more and 26J1/2/cm3/2 or less and includes a maleimide compound (1), which is a bismaleimide compound having at least two maleimide groups in a molecule, and when a total of the cyclic olefin-based copolymer (M) and the maleimide compound (L) is 100 parts by mass, a content of the maleimide compound (L) is 1 part by mass or more and 50 parts by mass or less.
    Type: Application
    Filed: November 22, 2019
    Publication date: September 1, 2022
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Hirohiko MURASE, Koutarou ASAHINA, Fumito TAKEUCHI
  • Publication number: 20210122861
    Abstract: The purpose of the present invention is to obtain an ethylene??-olefin?non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene??-olefin?non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an ?-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4) 125° C. is 5-100, and (4) the B value is 1.20 or more.
    Type: Application
    Filed: December 23, 2020
    Publication date: April 29, 2021
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Koji ENDO, Mayumi HIWARA, Sadahiko MATSUURA, Yusuke MIZOBUCHI, Yuichi YAMAMURA, Yuji NOGUCHI, Yuji ISHII, Tatsuya SAKAI, Keisuke SHISHIDO, Kotaro ICHINO, Kiyohide INOMATA, Fumito TAKEUCHI, Kenta IDE
  • Publication number: 20210122860
    Abstract: The purpose of the present invention is to obtain an ethylene??-olefin?non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene??-olefin?non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an ?-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4)125° C. is 5-100, and (4) the B value is 1.20 or more.
    Type: Application
    Filed: December 23, 2020
    Publication date: April 29, 2021
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Koji ENDO, Mayumi HIWARA, Sadahiko MATSUURA, Yusuke MIZOBUCHI, Yuichi YAMAMURA, Yuji NOGUCHI, Yuji ISHII, Tatsuya SAKAI, Keisuke SHISHIDO, Kotaro ICHINO, Kiyohide INOMATA, Fumito TAKEUCHI, Kenta IDE
  • Patent number: 10919997
    Abstract: The purpose of the present invention is to obtain an ethylene.?-olefin.non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene.?-olefin.non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an ?-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4)125° C. is 5-100, and (4) the B value is 1.20 or more.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: February 16, 2021
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koji Endo, Mayumi Hiwara, Sadahiko Matsuura, Yusuke Mizobuchi, Yuichi Yamamura, Yuji Noguchi, Yuji Ishii, Tatsuya Sakai, Keisuke Shishido, Kotaro Ichino, Kiyohide Inomata, Fumito Takeuchi, Kenta Ide
  • Publication number: 20200129682
    Abstract: A supporter for body (1) to be attached to a skin of a body includes a pad base member (10) which is made of an elastic member and has a curved shape at least locally, and an adhesion layer (11) which is provided in a surface of the pad base member (10) on a side being adhered to the skin. The adhesion layer (11) is adhered to the skin with the curved shape of the pad base member (10) being stretched along a shape of the body, and holds the skin in a state in which the skin is drawn up, using a restoring force of the pad base member (10).
    Type: Application
    Filed: October 31, 2018
    Publication date: April 30, 2020
    Inventors: Aya TAKEUCHI, Fumito TAKEUCHI, Tomoaki ITO, Kazuoki NAKAI, Kenzo KASE
  • Patent number: 10457802
    Abstract: The present invention is a crosslinked body obtained by crosslinking a composition which comprises 100 parts by mass of (A) an ethylene/?-olefin/non-conjugated polyene copolymer having one or more peaks of tan ? in the temperature range of ?50 to ?30° C., the tan ? being determined by dynamic viscoelasticity measurement, 50 to 500 parts by mass of (B) an olefin-based copolymer having one or more peaks of tan ? in the temperature range of 0 to 40° C., the tan ? being determined by dynamic viscoelasticity measurement, 5 to 300 parts by mass of (C) a softener, 10 to 300 parts by mass of (D) a reinforcing filler and 0.1 to 10 parts by mass of (E) a vulcanizing agent, and which has a content ratio by mass ((C)/(D)) of (C) the softener to (D) the reinforcing filler of 0.3 to 1.5, the crosslinked body having a durometer hardness (value immediately after measurement) of 50 to 8.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: October 29, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Fumito Takeuchi, Kengo Goto
  • Publication number: 20190218853
    Abstract: The elastically deformable seal member has hollow tube (6) and porous body (7) inserted into the interior of tube (6). The interior of tube (6) is not completely filled by porous body (7), and air-holding space (8) is provided between a portion of the inner wall of tube (6) and a portion of the outer surface of porous body (7). Porous body (7) comprises a material having a water absorption coefficient in the range of 10% to 3000% in an uncompressed state. Porous body (7) is disposed such that the volume of porous body (7) occupies 2.5% or more of the internal volume of tube (6).
    Type: Application
    Filed: May 16, 2017
    Publication date: July 18, 2019
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Fumito TAKEUCHI, Kengo GOTO
  • Publication number: 20190211193
    Abstract: The present invention is a crosslinked body obtained by crosslinking a composition which comprises 100 parts by mass of (A) an ethylene/?-olefin/non-conjugated polyene copolymer having one or more peaks of tan ? in the temperature range of ?50 to ?30° C., the tan ? being determined by dynamic viscoelasticity measurement, 50 to 500 parts by mass of (B) an olefin-based copolymer having one or more peaks of tan ? in the temperature range of 0 to 40° C., the tan ? being determined by dynamic viscoelasticity measurement, 5 to 300 parts by mass of (C) a softener, 10 to 300 parts by mass of (D) a reinforcing filler and 0.1 to 10 parts by mass of (E) a vulcanizing agent, and which has a content ratio by mass ((C)/(D)) of (C) the softener to (D) the reinforcing filler of 0.3 to 1.5, the crosslinked body having a durometer hardness (value immediately after measurement) of 50 to 8.
    Type: Application
    Filed: March 1, 2016
    Publication date: July 11, 2019
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Fumito TAKEUCHI, Kengo GOTO
  • Patent number: 9865752
    Abstract: An encapsulating material for solar cell of the invention contains an ethylene/?-olefin copolymer, and a content of a fluorine element in the ethylene/?-olefin copolymer, which is determined using a combustion method and an ion chromatograph method, is equal to or less than 30 ppm.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: January 9, 2018
    Assignees: MITSUI CHEMICALS, INC., MITSUI CHEMICALS TOHCELLO, INC.
    Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito
  • Patent number: 9761747
    Abstract: The encapsulating material for solar cell is an encapsulating material for solar cell including an ethylene/?-olefin copolymer and an organic peroxide having a one-minute half-life temperature in a range of 100° C. to 170° C. In addition, the complex viscosity of the encapsulating material for solar cell has the minimum value (?*1) of the complex viscosity at a temperature in a range of 100° C. to lower than 135° C., the minimum value (?*1) of the complex viscosity is in a range of 6.0×103 Pa·s to 4.0×104 Pa·s, the complex viscosity (?*2) of the encapsulating material for solar cell at 150° C. is in a range of 2.0×104 Pa·s to 1.0×105 Pa·s, and the content of the organic peroxide in the encapsulating material for solar cell is in a range of 0.1 parts by weight to 3 parts by weight with respect to 100 parts by weight of the ethylene/?-olefin copolymer.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: September 12, 2017
    Assignee: MITSUI CHEMICALS TOHCELLO, INC.
    Inventors: Shigenobu Ikenaga, Fumito Takeuchi, Tomoaki Ito, Kazuhiro Yarimizu, Kaoru Ohshimizu, Masaaki Odoi
  • Publication number: 20170148427
    Abstract: The present invention provides a sound insulator which includes: a flexible material (A) having a peak of loss tangent (tan ?), which is determined by dynamic viscoelasticity measurement, in a temperature range of ?60° C. to lower than 0° C.; and a resin (B) having a peak of loss tangent (tan ?), which is determined by dynamic viscoelasticity measurement, in a temperature range of 0° C. to 60° C., the sound insulator including the resin (B) at a ratio of 1 to 50 parts by mass with respect to 100 parts by mass of the flexible material (A). The sound insulator of the present invention is a material which realizes excellent sound insulation properties without relying on a complex shape and an increase in weight.
    Type: Application
    Filed: March 18, 2015
    Publication date: May 25, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Fumito TAKEUCHI, Yuji ISHII, Mitsunao ARINO, Ryo NAKATSUJI, Kiyohide INOMATA, Tatsuya SAKAI