Patents by Inventor Masashi Ikawa

Masashi Ikawa 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: 20210403619
    Abstract: A high-molecular-weight compound having a plurality of polymer chains linked through a divalent or higher-valent linking group, in which the divalent or higher-valent linking group has a thiol group and at least one of a thioether structure and a thiourethane structure, and a ratio of an absolute weight-average molecular weight to a relative weight-average molecular weight (absolute Mw/relative Mw) of the high-molecular-weight compound is 1.25 or more; and a method for producing the same are provided.
    Type: Application
    Filed: August 27, 2021
    Publication date: December 30, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Shunsuke Chatani, Yuki Miyahara, Hiroshi Niino, Masashi Ikawa, Haruki Okada, Fumiko Fujie
  • Patent number: 10435553
    Abstract: The present invention provides a resin composition including a vinylidene fluoride-based resin (A), having a crystal melting enthalpy of 10 to 45 J/g as measured with a differential scanning calorimeter, and having (2) IHv of 60 or less as obtained by (1) a light scattering measurement.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: October 8, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tatsuhiro Hiraoka, Masashi Ikawa, Eiko Okamoto, Hiroshi Hosokawa, Kikue Irie
  • Publication number: 20180208758
    Abstract: The present invention provides a resin composition including a vinylidene fluoride-based resin (A), having a crystal melting enthalpy of 10 to 45 J/g as measured with a differential scanning calorimeter, and having (2) IHv of 60 or less as obtained by (1) a light scattering measurement.
    Type: Application
    Filed: March 9, 2018
    Publication date: July 26, 2018
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tatsuhiro Hiraoka, Masashi Ikawa, Eiko Okamoto, Hiroshi Hosokawa, Kikue Irie
  • Publication number: 20180127532
    Abstract: Provided is a resin composition containing 15% by weight to 80% by weight of the following polymer X and 20% by weight to 85% by weight of the following polymer Y based on the total weight of polymers contained in the resin composition: polymer X: polyvinylidene fluoride resin; and, polymer Y: copolymer having a domain (y1) compatible with the polymer X and a domain (y2) incompatible with the polymer X, and having a molecular weight distribution of 3.0 to 16.0. The weight average molecular weight of the polymer Y determined by gel permeation chromatography as polymethyl methacrylate is preferably 50,000 to 750,000.
    Type: Application
    Filed: May 23, 2016
    Publication date: May 10, 2018
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Masashi IKAWA, Eiko OKAMOTO, Hiroshi HOSOKAWA
  • Patent number: 9908265
    Abstract: The present invention relates to a method of manufacturing a mold having an oxide film with a plurality of pores formed on a surface of an aluminum substrate, the method including (a) a process of applying a voltage to a machined aluminum substrate and anodizing a surface of the aluminum substrate to form an oxide film; and (b) a process of removing at least a part of the oxide film formed in the process (a), wherein a voltage (Va[V]) immediately before the process (a) is terminated and a time (ta[sec]) required to reach the voltage (Va[V]) after starting the application of voltage satisfy the following Equation (i) in the process (a). 0.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: March 6, 2018
    Assignees: MITSUBISHI CHEMICAL CORPORATION, KANAGAWA INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Masashi Ikawa, Eiko Okamoto, Hiroshi Onomoto, Jitsuo Hirohata, Yuji Matsubara, Hideki Masuda
  • Patent number: 9797059
    Abstract: A method for manufacturing a mold includes (a) anodizing an aluminum substrate at a voltage of 60 V to 120 V in an electrolytic solution in which two or more species of acid are mixed, and forming an oxide film having a plurality of minute holes on a surface of the aluminum substrate; and (b) removing at least a portion of the oxide film. The electrolytic solution used in (a) satisfies the relation (D1)/2<D2, where D1 is the current density when the aluminum substrate is anodized under the same conditions as in (a) in an electrolytic solution of only the acid (A) having the highest acid dissociation constant (Ka) of the two or more species of acid, and D2 is the current density when the aluminum substrate is anodized under the same conditions (a) in the same electrolytic solution as that of (a).
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: October 24, 2017
    Assignees: MITSUBISHI CHEMICAL CORPORATION, KANAGAWA INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Masashi Ikawa, Eiko Okamoto, Hideki Masuda
  • Patent number: 9718910
    Abstract: Provided is an article having high scratch resistance and satisfactory fingerprint wipeability. Disclosed is an article having a microrelief structure containing a cured product of a resin composition on the surface, in which the indentation elastic modulus (X) [MPa] and the creep deformation ratio (Y) [%] of the cured product satisfy the following formulas (1) and (2): 80?X?560??(1) Y?(0.00022X?0.01)×100??(2).
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: August 1, 2017
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Go Otani, Seiichiro Mori, Masashi Ikawa, Yusuke Nakai, Keiko Yasukawa, Shinji Makino
  • Publication number: 20170096553
    Abstract: A resin composition which contains from 5% by mass to 65% by mass (inclusive) of a polymer (X) described below and from 35% by mass to 95% by mass (inclusive) of a polymer (Y) described below. Alternatively, a resin composition which contains more than 65% by mass but 85% by mass or less of a polymer (X) described below and 15% by mass or more but less than 35% by mass of a polymer (Y) described below, wherein a domain (y1) described below or a domain (y2) described below comprises a macromonomer unit.
    Type: Application
    Filed: March 18, 2015
    Publication date: April 6, 2017
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Masashi IKAWA, Hiroshi HOSOKAWA, Eiko OKAMOTO, Kousuke FUJIYAMA
  • Patent number: 9605355
    Abstract: This method for producing anodic porous alumina such that an oxide coating film having a plurality of minute pores is formed at the surface of an aluminum substrate is characterized by containing: a step (a) for immersing the aluminum substrate in an electrolytic liquid resulting from mixing a plurality of acids; a step (b) for imposing a voltage on the aluminum substrate immersed in the electrolytic liquid; a step (c) for holding the aluminum substrate in the state of being immersed in the electrolytic liquid essentially without imposing a voltage on the aluminum substrate; and a step (d) for alternately repeating step (b) and step (c). By means of the present invention, it is possible using a simple device and with few steps to provide a method that easily produces anodic porous alumina such that an oxide coating film having a plurality of minute pores is formed at the surface of an aluminum substrate.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: March 28, 2017
    Assignees: MITSUBISHI RAYON CO., LTD., KANAGAWA ACADEMY OF SCIENCE AND TECHNOLOGY
    Inventors: Hiroshi Onomoto, Jitsuo Hirohata, Eiko Okamoto, Yuji Matsubara, Masashi Ikawa, Hideki Masuda, Takashi Yanagishita
  • Publication number: 20150299888
    Abstract: This method for producing anodic porous alumina such that an oxide coating film having a plurality of minute pores is formed at the surface of an aluminum substrate is characterized by containing: a step (a) for immersing the aluminum substrate in an electrolytic liquid resulting from mixing a plurality of acids; a step (b) for imposing a voltage on the aluminum substrate immersed in the electrolytic liquid; a step (c) for holding the aluminum substrate in the state of being immersed in the electrolytic liquid essentially without imposing a voltage on the aluminum substrate; and a step (d) for alternately repeating step (b) and step (c). By means of the present invention, it is possible using a simple device and with few steps to provide a method that easily produces anodic porous alumina such that an oxide coating film having a plurality of minute pores is formed at the surface of an aluminum substrate.
    Type: Application
    Filed: December 9, 2013
    Publication date: October 22, 2015
    Inventors: Hiroshi ONOMOTO, Jitsuo HIROHATA, Eiko OKAMOTO, Yuji MATSUBARA, Masashi IKAWA, Hideki MASUDA, Takashi YANAGISHITA
  • Publication number: 20150290844
    Abstract: The present invention relates to a method of manufacturing a mold having an oxide film with a plurality of pores formed on a surface of an aluminum substrate, the method including (a) a process of applying a voltage to a machined aluminum substrate and anodizing a surface of the aluminum substrate to form an oxide film; and (b) a process of removing at least a part of the oxide film formed in the process (a), wherein a voltage (Va [V]) immediately before the process (a) is terminated and a time (ta [sec]) required to reach the voltage (Va [V]) after starting the application of voltage satisfy the following Equation (i) in the process (a). 0.
    Type: Application
    Filed: August 6, 2013
    Publication date: October 15, 2015
    Inventors: Masashi Ikawa, Eiko Okamoto, Hiroshi Onomoto, Jitsuo Hirohata, Yuji Matsubara, Hideki Masuda
  • Publication number: 20150166704
    Abstract: Provided is an article having high scratch resistance and satisfactory fingerprint wipeability. Disclosed is an article having a microrelief structure containing a cured product of a resin composition on the surface, in which the indentation elastic modulus (X) [MPa] and the creep deformation ratio (Y) [%] of the cured product satisfy the following formulas (1) and (2): 80?X?560??(1) Y?(0.00022X?0.01)×100??(2).
    Type: Application
    Filed: June 17, 2013
    Publication date: June 18, 2015
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Go Otani, Seiichiro Mori, Masashi Ikawa, Yusuke Nakai, Keiko Yasukawa, Shinji Makino
  • Publication number: 20150140268
    Abstract: A method for manufacturing a mold includes (a) anodizing an aluminum substrate at a voltage of 60 V to 120 V in an electrolytic solution in which two or more species of acid are mixed, and forming an oxide film having a plurality of minute holes on a surface of the aluminum substrate; and (b) removing at least a portion of the oxide film. The electrolytic solution used in (a) satisfies the relation (D1)/2<D2, where D1 is the current density when the aluminum substrate is anodized under the same conditions as in (a) in an electrolytic solution of only the acid (A) having the highest acid dissociation constant (Ka) of the two or more species of acid, and D2 is the current density when the aluminum substrate is anodized under the same conditions (a) in the same electrolytic solution as that of (a).
    Type: Application
    Filed: May 28, 2013
    Publication date: May 21, 2015
    Inventors: Masashi Ikawa, Eiko Okamoto, Hideki Masuda
  • Publication number: 20150125659
    Abstract: The purpose of this embodiment is to provide a laminate equipped with a surface layer excellent in antifouling property that dirt can be easily removed and excoriation resistance. This embodiment is a laminate including a surface layer having a surface formed in a fine relief structure, wherein an elastic modulus of the surface layer is less than 250 MPa and a slope of a friction coefficient of the surface layer is 0.0018 or less.
    Type: Application
    Filed: June 14, 2013
    Publication date: May 7, 2015
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Kousuke Fujiyama, Seiichiro Mori, Go Otani, Masashi Ikawa, Yusuke Nakai, Tetsuya Jigami