Patents by Inventor Yoshifumi Araki

Yoshifumi Araki 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: 20210284827
    Abstract: Problem to be Solved The present invention provides a conjugated diene-based polymer composition excellent in rolling resistance, grip performance on a wet road surface, and abrasion resistance when formed into a tire. Solution A conjugated diene-based polymer composition containing: 10 to 90 parts by mass of a conjugated diene-based polymer (A) having a glass transition temperature of ?20° C. or more; and 10 to 90 parts by mass of a conjugated diene-based polymer (B) having a glass transition temperature of ?25° C. or less, wherein the conjugated diene-based polymer (A) has an absolute molecular weight, measured by viscosity detector-equipped GPC-light scattering measurement, of 40×104 or more and 5000×104 or less, and a branch number (Bn), measured by the viscosity detector-equipped GPC-light scattering measurement, of 8 or more.
    Type: Application
    Filed: March 9, 2021
    Publication date: September 16, 2021
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Shogo Sumitani, Shinichi Sekikawa, Kenta Hisamura, Yoshifumi Araki
  • Publication number: 20210189039
    Abstract: A production method for a branched conjugated diene-based polymer, comprising: a polymerizing step of obtaining a conjugated diene-based polymer having an active end by polymerizing or copolymerizing a conjugated diene compound, or a conjugated diene compound and an aromatic vinyl compound with an alkali metal compound or an alkaline earth metal compound used as a polymerization initiator; and a branching step of introducing a branch structure by reacting a styrene derivative as a branching agent with the active end of the conjugated diene-based polymer.
    Type: Application
    Filed: December 9, 2020
    Publication date: June 24, 2021
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Shinichi Sekikawa, Kenta Hisamura, Syogo Sumitani, Yoshifumi Araki
  • Patent number: 10640639
    Abstract: The present invention provides a polymer comprising conjugated diene monomer units and vinyl aromatic monomer units, wherein the polymer has a polymer block (A) comprising principally vinyl aromatic monomer units, and a polymer block (B) comprising conjugated diene monomer units and vinyl aromatic monomer units, and has a Bragg spacing of 27 nm or larger and 50 nm or smaller.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: May 5, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Takayuki Shiromoto, Shigeo Nakajima, Yoshifumi Araki, Takuya Suzuki
  • Publication number: 20200087458
    Abstract: The present invention provides a polyamide composition containing 50 to 99 parts by mass of an aliphatic polyamide (1A) formed from a diamine and a dicarboxylic acid, and 1 to 50 parts by mass of a semi-aromatic polyamide (1B) containing a dicarboxylic acid unit that includes at least 75 mol % of isophthalic acid and a diamine unit that includes at least 50 mol % of a diamine of 4 to 10 carbon atoms, wherein the tan ? peak temperature of the polyamide composition is at least 90° C., and the weight average molecular weight Mw of the polyamide composition satisfies 15,000?Mw?35,000. The invention also provides a molded article or the like formed using the polyamide composition.
    Type: Application
    Filed: March 30, 2018
    Publication date: March 19, 2020
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Shinji IEDA, Koichi NAGASE, Hisho YAMADA, Jun MIKAMI, Takayuki WAKITA, Yoshifumi ARAKI, Kimiaki KAWATANI, Tomoyo OKUMURA, Yoshikimi KONDO, Kazunori TERADA
  • Patent number: 10563060
    Abstract: A thermoplastic resin composition comprising: a block copolymer (a) having 60 to 80% by mass of a vinyl aromatic monomer unit and 40 to 20% by mass of a conjugated diene monomer unit; and a copolymer (b) having 60 to 90% by mass of a vinyl aromatic monomer unit and 40 to 10% by mass of an unsaturated nitrile monomer unit, wherein the block copolymer (a) has at least one polymer block (S) primarily having a vinyl aromatic monomer unit, the block copolymer (a) has at least one tan ? peak of dynamic viscoelasticity at a temperature in a range of ?73 to ?10° C., and a mass ratio (a)/(b) of the block copolymer (a) to the copolymer (b) is 1/99 to 80/20.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: February 18, 2020
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Naohiko Sato, Yoshifumi Araki
  • Patent number: 10487249
    Abstract: The adhesive composition according to the invention of the present application contains a block copolymer (a) having a block mainly comprising a vinyl aromatic monomer unit, a tackifier (b) and an oil (c), in which the block copolymer (a) contains a partially hydrogenated block copolymer (a-1), the partially hydrogenated block copolymer (a-1) has a vinyl aromatic monomer unit and a conjugated diene monomer unit, the content of the vinyl aromatic monomer unit is 10 mass % or more and 19 mass % or less based on 100 mass % of the partially hydrogenated block copolymer (a-1), and the hydrogenation ratio of double bonds contained in the conjugated diene monomer unit in the partially hydrogenated block copolymer (a-1) is 15 mol % or more and less than 80 mol % based on the total (amount) of double bonds before hydrogenation.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 26, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshifumi Araki, Kosuke Nakatani, Shigeo Nakajima
  • Patent number: 10472514
    Abstract: A block copolymer composition including: 10% by mass or more and 90% by mass or less of a component (a), and 10% by mass or more and 90% by mass or less of a component (b), wherein the component (a) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit, wherein the block copolymer has a weight average molecular weight of 30,000 or higher and 150,000 or lower; and the component (b) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 12, 2019
    Assignees: Asahi Kasei Kabushiki Kaisha, Japan Elastomer Co., Ltd.
    Inventors: Takahiro Hisasue, Shigeo Nakajima, Yoshifumi Araki, Yukinori Nakamichi
  • Patent number: 10414849
    Abstract: A partially hydrogenated block copolymer of the present invention includes: a polymer block (A) containing a vinyl aromatic monomer unit as a main component: and a polymer block (B) containing a conjugated diene monomer unit, wherein in a differential molecular weight distribution (B) of a degradation product of the partially hydrogenated block copolymer obtained by an ozone degradation method, a distribution of degree of hydrogenation H, which is given by a maximum peak height in a region of a molecular weight of 800 or more and 3,000 or less, is 0.01 to 0.5.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: September 17, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Ippei Kameda, Yoshifumi Araki
  • Patent number: 10385243
    Abstract: Disclosure provides a block copolymer composition having 20% by mass or more and 90% by mass or less of a component (A) and 10% by mass or more and 80% by mass or less of a component (B), wherein the component (A) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 30,000 or higher and 190,000 or lower; and the component (B) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 60,000 or higher and 500,000 or lower.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: August 20, 2019
    Assignees: Asahi Kasei Kabushiki Kaisha, Japan Elastomer Co., Ltd.
    Inventors: Kosuke Nakatani, Yoshifumi Araki, Kenta Shibuya, Takahiro Hisasue, Kazuo Moritou
  • Patent number: 10351475
    Abstract: The asphalt composition of the present invention is an asphalt composition comprising 1% to 15% by mass of a block copolymer (a) and an asphalt (c), wherein the block copolymer (a) comprises a specific block copolymer (a-1) and a specific block copolymer (a-2) in specific amounts, wherein the content of a vinyl aromatic monomer unit in the block copolymer (a) is 34% by mass or more and 55% by mass or less, the number average molecular weight of the block copolymer (a-1) is in the range of 20,000 to 73,000, and the number average molecular weight of the block copolymer (a-2) is 1.5 to 5.0 times higher than the number average molecular weight of the block copolymer (a-1).
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: July 16, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventor: Yoshifumi Araki
  • Patent number: 10323164
    Abstract: A hydrogenated block copolymer composition, comprising: a component (A) comprising at least one polymer block comprising a vinyl aromatic hydrocarbon as a primary component and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 30,000 or higher and 500,000 or lower, and a component (B) comprising at least two polymer blocks comprising a vinyl aromatic hydrocarbon and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 50,000 or higher and 1,000,000 or lower, wherein the composition satisfies predetermined requirements.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: June 18, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Kosuke Nakatani, Takahiro Hisasue, Yoshifumi Araki, Tadashi Matsushita, Kenta Shibuya, Takeshi Aoyagi, Ippei Kameda, Atsushi Yasumoto
  • Publication number: 20190153214
    Abstract: The present invention provides a polymer comprising conjugated diene monomer units and vinyl aromatic monomer units, wherein the polymer has a polymer block (A) comprising principally vinyl aromatic monomer units, and a polymer block (B) comprising conjugated diene monomer units and vinyl aromatic monomer units, and has a Bragg spacing of 27 nm or larger and 50 nm or smaller.
    Type: Application
    Filed: January 16, 2015
    Publication date: May 23, 2019
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Takayuki Shiromoto, Shigeo Nakajima, Yoshifumi Araki, Takuya Suzuki
  • Publication number: 20190153273
    Abstract: The adhesive composition according to the invention of the present application contains a block copolymer (a) having a block mainly comprising a vinyl aromatic monomer unit, a tackifier (b) and an oil (c), in which the block copolymer (a) contains a partially hydrogenated block copolymer (a-1), the partially hydrogenated block copolymer (a-1) has a vinyl aromatic monomer unit and a conjugated diene monomer unit, the content of the vinyl aromatic monomer unit is 10 mass % or more and 19 mass % or less based on 100 mass % of the partially hydrogenated block copolymer (a-1), and the hydrogenation ratio of double bonds contained in the conjugated diene monomer unit in the partially hydrogenated block copolymer (a-1) is 15 mol % or more and less than 80 mol % based on the total (amount) of double bonds before hydrogenation.
    Type: Application
    Filed: January 22, 2015
    Publication date: May 23, 2019
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshifumi Araki, Kosuke Nakatani, Shigeo Nakajima
  • Patent number: 10179850
    Abstract: The present invention provides a foam which maintains high hardness while being lightweight and has excellent peel strength and permanent compression set, and a foamable composition used to obtain the aforementioned foam. A foamable composition comprising (A) an olefin-based copolymer; (B) a copolymer that is (B-I) and/or (B-II) described below, (B-I) a vinyl aromatic-based copolymer comprising a vinyl aromatic compound and a conjugated diene, and/or a vinyl aromatic-based copolymer comprising a vinyl aromatic compound and alkylene, (B-II) an ethylene-based copolymer having an unsaturated group; (C) an inorganic filler; (D) an organic silane coupling agent; and (E) a foaming agent; wherein a mass ratio of the component (A) to the component (B), (A/B), is from 5/95 to 100/0; an amount of the component (C) is from 0.5 to 35 mass parts, and an amount of the component (E) is from 0.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: January 15, 2019
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Yasuhiro Kusanose, Mika Horiuchi, Yoshifumi Araki
  • Publication number: 20180345261
    Abstract: The present invention, with the purpose of providing a catalyst composition for hydrogenation having high hydrogenation activity, provides a catalyst composition for hydrogenation, comprising: a titanocene dichloride; an organometal compound comprising one or two or more elements selected from the group consisting of Li, Na, K, Mg, Zn, Al and Ca; an unsaturated compound; and a polar compound, wherein a content ratio of the unsaturated compound to the titanocene dichloride is 0.1 or more and 8.0 or less, and a content ratio of the polar compound to the titanocene dichloride is 0.01 or more and 2.0 or less.
    Type: Application
    Filed: November 25, 2016
    Publication date: December 6, 2018
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshifumi Araki, Katsunori Nitta, Eiji Sasaya, Takahiro Tsuji
  • Patent number: 10144004
    Abstract: A method for producing a catalyst composition for hydrogenation, wherein: (A): a titanocene compound represented by following general formula (1): wherein R5 and R6 represent a group selected from the group consisting of hydrogen, a hydrocarbon group having 1 to 12 carbon atoms, an aryloxy group, an alkoxy group, a halogen group and a carbonyl group, and may be the same or different, and R1 and R2 represent a group selected from the group consisting of hydrogen and a hydrocarbon group having 1 to 12 carbon atoms, and may be the same or different, provided that R1 and R2 represent are not all hydrogens or all hydrocarbon groups having 1 to 12 carbon atoms; (B): a compound containing at least one element selected from the group consisting of elements Li, Na, K, Mg, Zn, Al, and Ca; and (C): an unsaturated compound are used, and the method has: a force application step of applying a shearing force at a shearing rate of 1000 (1/s) or more to at least component (A); and a step of mixing components (A
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: December 4, 2018
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Yoshifumi Araki, Eiji Sasaya, Katsunori Nitta
  • Patent number: 10138319
    Abstract: The polymer according to the present invention is a polymer containing a conjugated diene monomer unit and a vinyl aromatic monomer unit, wherein the polymer has a polymer block (A) containing the vinyl aromatic monomer unit as a main component and a polymer block (B) containing the conjugated diene monomer unit and the vinyl aromatic monomer unit, a content of the polymer block (A) is 10% by mass or more and 40% by mass or less, a bulk density of the polymer is 0.05 g/mL or more and 0.45 g/mL or less, and a specific surface area of the polymer is 0.10 m2/g or more and 0.60 m2/g or less.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: November 27, 2018
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Takayuki Shiromoto, Shigeo Nakajima, Yoshifumi Araki, Nobuaki Kubo, Takuya Suzuki
  • Patent number: 10138368
    Abstract: A block copolymer composition including: 10% by mass or more and 90% by mass or less of a component (a), and 10% by mass or more and 90% by mass or less of a component (b), wherein the component (a) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit, wherein the block copolymer has a weight average molecular weight of 30,000 or higher and 150,000 or lower; and the component (b) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 27, 2018
    Assignees: Asahi Kasei Kabushiki Kaisha, Japan Elastomer Co., Ltd.
    Inventors: Takahiro Hisasue, Shigeo Nakajima, Yoshifumi Araki, Yukinori Nakamichi
  • Publication number: 20180201716
    Abstract: A partially hydrogenated block copolymer of the present invention includes: a polymer block (A) containing a vinyl aromatic monomer unit as a main component: and a polymer block (B) containing a conjugated diene monomer unit, wherein in a differential molecular weight distribution (B) of a degradation product of the partially hydrogenated block copolymer obtained by an ozone degradation method, a distribution of degree of hydrogenation H, which is given by a maximum peak height in a region of a molecular weight of 800 or more and 3,000 or less, is 0.01 to 0.5.
    Type: Application
    Filed: July 15, 2016
    Publication date: July 19, 2018
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Ippei Kameda, Yoshifumi Araki
  • Patent number: 10016749
    Abstract: A catalyst composition for hydrogenation including (A) to (D), in which a mass ratio ((C)/(A)) is 0.1 to 4.0 and a mass ratio ((D)/(A)) is 0.01 to 1.00, (A): a titanocene compound represented by formula (1), (wherein R5 and R6 are any group selected from hydrogen, a hydrocarbon group having 1 to 12 carbon atoms, an aryloxy group, an alkoxy group, a halogen group, and a carbonyl group. R1 and R2 are any group selected from the group consisting of hydrogen and a hydrocarbon group having 1 to 12 carbon atoms, and R1 and R2 are not all hydrogen atoms or all a hydrocarbon group having 1 to 12 carbon atoms), (B): a reductant formed from a compound containing an element selected from the elements Li, Na, K, Mg, Zn, Al, and Ca, (C): an unsaturated compound having a molecular weight of 400 or less, and (D): a polar compound.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: July 10, 2018
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Yoshifumi Araki, Eiji Sasaya, Katsunori Nitta