Patents by Inventor Shinji Ohtomo

Shinji Ohtomo 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: 10927225
    Abstract: Aromatic polyether microparticles contain a plurality of particles containing an aromatic polyether in which a content of the particles having a particle diameter equal to or smaller than 50 ?m to a total volume of the aromatic polyether microparticles is equal to or higher than 50% by volume. The aromatic polyether microparticles contain phenolic hydroxyl groups in a content equal to or greater than 80 ?mol/g.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: February 23, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji Ohtomo, Yoshio Shoda
  • Publication number: 20210024687
    Abstract: An aromatic liquid crystal polyester containing repeating structural units represented by formulas (A1), (B), (C) and (D) shown below. —O—Ar1—CO—??(A1) —CO—Ar2—CO—??(B) —O—Ar3—O—??(C) —O—Ar4—O—??(D) (In the formulas, Ar1 represents a 2,6-naphthalene group, Art represents at least one group selected from the group consisting of a 2,6-naphthalenediyl group, 1,4-phe vlene group, 1,3-phenvIene group and 4,4?-biphenylene group, Ar3 represents at least one group selected from the group consisting of a 2, mphthalenediyl group, 1,6-naphthalenediyl group and 1,5-naphthalenediyl group, Ar4 represents at least one group selected from the group consisting of a 2,6-naphthalenediyl group, 1,4-phenylene group, 1,3-phenylene group and 4,4?-hiphenylene group, and each of the groups represented by Ar1, Ar3 or Ar4 may have a halogen atom, an alkyl group of 1 to 10 carbon atoms Of alt aryl group of 6 to 20 carbon atoms as a substituent.
    Type: Application
    Filed: March 25, 2019
    Publication date: January 28, 2021
    Inventors: Shinji OHTOMO, Masanobu MATSUBARA
  • Patent number: 10899888
    Abstract: A thermoplastic aromatic polysulfone is obtained by polymerizing a dihalogeno compound (A) and a dihydric phenol (B). The ratio (Mw/Mn) between a number average molecular weight (Mn) and a weight average molecular weight (Mw) is at least 1.91, and the number average molecular weight (Mn) is at least 6,000 and less than 14,000, In (A) and (B), each of X and X? independently represents a halogen atom; each of R1, R2, R3 and R4 independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; each of n1, n2, n3 and n4 independently represents an integer of 0 to 4; and when n1, n2, n3 or n4 is an integer of 2 to 4, a plurality of R1, R2, R3 or R4 groups may be the same or different from each other.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: January 26, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji Ohtomo, Masanobu Matsubara
  • Patent number: 10870755
    Abstract: The present invention relates to a method for producing thermoplastic aromatic polysulfone resin, in which a polymerization reaction is performed in an organic solvent by using compound (A), a dihalogeno compound represented by Formula (I), compound (B), a divalent phenol represented by Formula (II), and compound (C), an alkali metal carbonate, at a charging molar ratio satisfying the following Formulae (1) to (3): (1) 0.900<(A)/(B)<0.990; (2) {(A)/(B)}?0.02<(C)/(B)<{(A)/(B)}+0.01; and (3) (C)/(B)<1.00, In Formulae (I) and (II), R1 to R4 represent an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, X and X? represent a halogen atom, Y represents one or more groups selected from the group consisting of —SO2—, —C(CH3)2—, —CH2—, —O— and —CO—, or a single bond, and n1, n2, n3 and n4 represent an integer of 0 to 4.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: December 22, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Tomokazu Yasunaga, Shinji Ohtomo, Toshiaki Sugimura
  • Patent number: 10851207
    Abstract: A thermoplastic aromatic polysulfone is obtained by polymerizing a dihalogeno compound (A) and a dihydric phenol (B). The ratio (Mw/Mn) between a number average molecular weight (Mn) and a weight average molecular weight (Mw) is at least 1.80 and less than 1.90, and the number average molecular weight (Mn) is at least 6,000 and less than 14,000. In (A) and (B), each of X and X? independently represents a halogen atom; each of R1, R2, R3 and R4 independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; each of n1, n2, n3 and n4 independently represents an integer of 0 to 4; and when n1, n2, n3 or n4 is an integer of 2 to 4, a plurality of R1, R2, R3 or R4 groups may be the same or different from each other.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: December 1, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji Ohtomo, Masanobu Matsubara
  • Publication number: 20190345295
    Abstract: A resin microparticle production method includes a step of pulverizing resin particles having a thermoplastic resin as a forming material and having a BET specific surface area of equal to or more than 5 m2/g using an impact type pulverizer
    Type: Application
    Filed: December 25, 2017
    Publication date: November 14, 2019
    Inventors: Kenji GOUDA, Toshiaki SUGIMURA, Shinji OHTOMO
  • Publication number: 20190270855
    Abstract: Aromatic polyether microparticles contain a plurality of particles containing an aromatic polyether in which a content of the particles having a particle diameter equal to or smaller than 50 ?m to a total volume of the aromatic polyether microparticles is equal to or higher than 50% by volume. The aromatic polyether microparticles contain phenolic hydroxyl groups in a content equal to or greater than 80 ?mol/g.
    Type: Application
    Filed: September 14, 2017
    Publication date: September 5, 2019
    Inventors: Shinji OHTOMO, Yoshio SHODA
  • Patent number: 10400069
    Abstract: An aromatic polysulfone produced by polymerizing a dihalogeno compound represented by general formula (A) shown below, and a dihydric phenol represented by general formula (B) shown below, the aromatic polysulfone having a value (Mw/Mn) for the ratio between the weight average molecular weight (Mw) and the number average molecular weight (Mn) of less than 1.8, and having a number average molecular weight (Mn) of at least 6,000 but less than 14,000. (In the formula, each of X and X? independently represents a halogen atom; each of R1, R2, R3 and R4 independently represents an alkyl group having a carbon number of 1 to 4 or an alkoxy group having a carbon number of 1 to 4; each of n1, n2, n3 and n4 independently represents an integer of 0 to 4; and when n1, n2, n3 or n4 is an integer of 2 to 4, the plurality of R1, R2, R3 or R4 groups may be the same as, or different from, each other).
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: September 3, 2019
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji Ohtomo, Masanobu Matsubara
  • Publication number: 20190071542
    Abstract: A thermoplastic aromatic polysulfone is obtained by polymerizing a dihalogeno compound (A) and a dihydric phenol (B). The ratio (Mw/Mn) between a number average molecular weight (Mn) and a weight average molecular weight (Mw) is at least 1.91, and the number average molecular weight (Mn) is at least 6,000 and less than 14,000, In (A) and (B), each of X and X? independently represents a halogen atom; each of R1, R2, R3 and R4 independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; each of n1, n2, n3 and n4 independently represents an integer of 0 to 4; and when n1, n2, n3 or n4 is an integer of 2 to 4, a plurality of R1, R2, R3 or R4 groups may be the same or different from each other.
    Type: Application
    Filed: February 2, 2017
    Publication date: March 7, 2019
    Inventors: Shinji OHTOMO, Masanobu MATSUBARA
  • Publication number: 20190040203
    Abstract: A thermoplastic aromatic polysulfone is obtained by polymerizing a dihalogeno compound (A) and a dihydric phenol (B). The ratio (Mw/Mn) between a number average molecular weight (Mn) and a weight average molecular weight (Mw) is at least 1.80 and less than 1.90, and the number average molecular weight (Mn) is at least 6,000 and less than 14,000. In (A) and (B), each of X and X? independently represents a halogen atom; each of R1, R2, R3 and R4 independently represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; each of n1, n2, n3 and n4 independently represents an integer of 0 to 4; and when n1, n2, n3 or n4 is an integer of 2 to 4, a plurality of R1, R2, R3 or R4 groups may be the same or different from each other.
    Type: Application
    Filed: February 2, 2017
    Publication date: February 7, 2019
    Inventors: Shinji OHTOMO, Masanobu MATSUBARA
  • Publication number: 20180346710
    Abstract: The present invention relates to a method for producing thermoplastic aromatic polysulfone resin, in which a polymerization reaction is performed in an organic solvent by using compound (A), a dihalogeno compound represented by Formula (I), compound (B), a divalent phenol represented by Formula (II), and compound (C), an alkali metal carbonate, at a charging molar ratio satisfying the following Formulae (1) to (3): (1) 0.900<(A)/(B)<0.990; (2) {(A)/(B)}?0.02<(C)/(B)<{(A)/(B)}+0.01; and (3) (C)/(B)<1.00, In Formulae (I) and (II), R1 to R4 represent an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, X and X? represent a halogen atom, Y represents one or more groups selected from the group consisting of —SO2—, —C(CH3)2—, —CH2—, —O— and —CO—, or a single bond, and n1, n2, n3 and n4 represent an integer of 0 to 4.
    Type: Application
    Filed: September 14, 2016
    Publication date: December 6, 2018
    Inventors: Tomokazu YASUNAGA, Shinji OHTOMO, Toshiaki SUGIMURA
  • Publication number: 20180057636
    Abstract: An aromatic polysulfone produced by polymerizing a dihalogeno compound represented by general formula (A) shown below, and a dihydric phenol represented by general formula (B) shown below, the aromatic polysulfone having a value (Mw/Mn) for the ratio between the weight average molecular weight (Mw) and the number average molecular weight (Mn) of less than 1.8, and having a number average molecular weight (Mn) of at least 6,000 but less than 14,000. (In the formula, each of X and X? independently represents a halogen atom; each of R1, R2, R3 and R4 independently represents an alkyl group having a carbon number of 1 to 4 or an alkoxy group having a carbon number of 1 to 4; each of n1, n2, n3 and n4 independently represents an integer of 0 to 4; and when n1, n2, n3 or n4 is an integer of 2 to 4, the plurality of R1, R2, R3 or R4 groups may be the same as, or different from, each other.) Vertical axis: 5% weight reduction temperature (° C.
    Type: Application
    Filed: March 15, 2016
    Publication date: March 1, 2018
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji OHTOMO, Masanobu MATSUBARA
  • Patent number: 8759474
    Abstract: Disclosed is a method for producing a liquid crystal polyester, which includes the steps of: (1) polycondensing a mixture of 70.5 to 71.5 mol % of a compound represented by the defined formula (I) (for example, 4-acetoxybenzoic acid) with 28.5 to 29.5 mol % of a compound represented by the defined formula (II) (for example, 6-acetoxy-2-naphthoic acid) to form a prepolymer, wherein the prepolymer has a flow initiation temperature of 200° C. or higher, and the mixture is polycondensed until reaching the temperature which is at least 30° C. lower than the polycondensation temperature; (2) removing the prepolymer in a molten state, followed by solidification and further grinding to produce prepolymer particles; and (3) subjecting the prepolymer particles to a heat treatment at 200 to 310° C. under circulation of an inert gas while remaining in a solid phase state.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: June 24, 2014
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shinji Ohtomo, Yusaku Kohinata, Hidehiro Kotaka
  • Patent number: 8383759
    Abstract: A method is provided for producing a liquid crystal polyester including: (1) polycondensing a mixture of a compound of formula (I) with a compound of formula (II) in a polymerization tank at 260 to 350° C. to form a prepolymer, wherein a ratio of by-products to be distilled off to the theoretical amount of by-products formed when the compound of formula (I) is polycondensed with the compound of formula (II) in a stoichiometric relation is 95% or more; (2) continuously discharging the prepolymer from the polymerization tank in a molten state, solidifying the prepolymer while transferring, and continuously grinding the solidified prepolymer by a grinder provided downstream in a transfer direction to produce prepolymer particles; and (3) heat-treating the prepolymer particles in their solid state under an inert gas atmosphere, thereby subjecting them to solid phase polymerization.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: February 26, 2013
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shinji Ohtomo, Tadashi Fukunaka, Yi Zhang
  • Publication number: 20120253060
    Abstract: Disclosed is a method for producing a liquid crystal polyester, which includes the steps of: (1) polycondensing a mixture of 70.5 to 71.5 mol % of a compound represented by the defined formula (I) (for example, 4-acetoxybenzoic acid) with 28.5 to 29.5 mol % of a compound represented by the defined formula (II) (for example, 6-acetoxy-2-naphthoic acid) to form a prepolymer, wherein the prepolymer has a flow initiation temperature of 200° C. or higher, and the mixture is polycondensed until reaching the temperature which is at least 30° C. lower than the polycondensation temperature; (2) removing the prepolymer in a molten state, followed by solidification and further grinding to produce prepolymer particles; and (3) subjecting the prepolymer particles to a heat treatment at 200 to 310° C. under circulation of an inert gas while remaining in a solid phase state.
    Type: Application
    Filed: March 23, 2012
    Publication date: October 4, 2012
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji OHTOMO, Yusaku KOHINATA, Hidehiro KOTAKA
  • Publication number: 20120253003
    Abstract: A method is provided for producing a liquid crystal polyester including: (1) polycondensing a mixture of a compound of formula (I) with a compound of formula (II) in a polymerization tank at 260 to 350° C. to form a prepolymer, wherein a ratio of by-products to be distilled off to the theoretical amount of by-products formed when the compound of formula (I) is polycondensed with the compound of formula (II) in a stoichiometric relation is 95% or more; (2) continuously discharging the prepolymer from the polymerization tank in a molten state, solidifying the prepolymer while transferring, and continuously grinding the solidified prepolymer by a grinder provided downstream in a transfer direction to produce prepolymer particles; and (3) heat-treating the prepolymer particles in their solid state under an inert gas atmosphere, thereby subjecting them to solid phase polymerization.
    Type: Application
    Filed: March 26, 2012
    Publication date: October 4, 2012
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Shinji OHTOMO, Tadashi FUKUNAKA, Yi ZHANG
  • Publication number: 20100239744
    Abstract: A process for producing a porous film containing a liquid crystal polyester comprising the following steps (a), (b) and (c) in this order: (a) dispersing 1 to 1,500 parts by weight of a filler, based on 100 parts by weight of a liquid crystal polyester, in a solution in which 100 parts by weight of the liquid crystal polyester is dissolved in a solvent to produce a slurry coating liquid; (b) coating the coating liquid on at least one side of a substrate to form a coating film; and (c) removing the solvent from the coating film, immersing the film in a solvent which does not dissolve the liquid crystal polyester, and drying the film to form a porous film containing a liquid crystal polyester.
    Type: Application
    Filed: May 9, 2008
    Publication date: September 23, 2010
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hiroyuki Sato, Shinji Ohtomo, Satoshi Okamoto, Yutaka Suzuki
  • Publication number: 20100216028
    Abstract: Provided is a laminated porous film comprising a laminate of a heat-resistant porous layer containing a liquid crystalline polyester and a shutdown layer containing a thermoplastic resin.
    Type: Application
    Filed: May 9, 2008
    Publication date: August 26, 2010
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hiroyuki Sato, Shinji Ohtomo, Satoshi Okamoto, Yutaka Suzuki
  • Publication number: 20100159318
    Abstract: Provided is a laminated porous film comprising a laminate of a heat-resistant porous layer containing a heat-resistant resin and a shutdown layer containing a thermoplastic resin, wherein the film has a free chlorine content of 1×102 ppm by weight or less.
    Type: Application
    Filed: May 9, 2008
    Publication date: June 24, 2010
    Applicant: Sumitomo Chemical Company Limited
    Inventors: Hiroyuki Sato, Shinji Ohtomo, Satoshi Okamoto, Yutaka Suzuki
  • Patent number: 7618552
    Abstract: A liquid-crystalline polymer composition with less warpage not only in molding but also in a high temperature treatment conducted after molding is provided. The liquid-crystalline polymer comprises (i) 30 to 95% by weight of a first liquid-crystalline polymer having a deflection temperature under load of 200° C. or higher and (ii) 5 to 70% by weight of a second liquid-crystalline polymer having a deflection temperature under load lower than that of the first liquid-crystalline polymer, a melting point from 270° C. to lower than 400° C. and a flow-beginning temperature of 270° C. or higher.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: November 17, 2009
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tomoya Hosoda, Satoshi Okamoto, Toru Fujiki, Shinji Ohtomo