Patents by Inventor Eiko Okamoto

Eiko Okamoto 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: 20240026123
    Abstract: The present invention provides a resin additive capable of imparting low temperature impact properties to a resin material, a resin composition comprising the resin additive, and a molded article formed from the resin composition. The resin additive of the present invention is a polymer having a structural unit (a1) derived from the following monomer (1); the resin composition of the present invention comprises the resin additive and a resin material; and the molded article of the present invention is formed from the resin composition.
    Type: Application
    Filed: August 8, 2023
    Publication date: January 25, 2024
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yutaka AOKI, Hiroshi NIINO, Eiko OKAMOTO, Hiroyuki NISHII, Masahiro UEDA, Masashi IIMORI, Atsushi KUWAHARA
  • Publication number: 20230063756
    Abstract: A polymer composition, in which a differential distribution value in a differential molecular weight distribution curve of the polymer composition, as measured by gel permeation chromatography, satisfies Equation 1 and a maximum value of a normalized back-scattering intensity of a 35 wt % base oil solution of the polymer composition, where a size q of a scattering vector of small-angle X-ray scattering at 25° C. is in a range of 0.07 nm?1 or more and 2 nm?1 or less, is 40 cm?1 or more.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 2, 2023
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hiroki Fukuta, Katsufumi Mochizuki, Fumiko Fujie, Takahiro Mukuda, Hiroshi Niino, Eiko Okamoto, Kazunari Matsumura, Hiroko Shinada, Hiroki Hamamoto
  • 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
  • Patent number: 10137661
    Abstract: A structural body which comprises a base and a microrelief structure layer having a microrelief structure. The microrelief structure layer is laminated on the base so as to form the surface layer of this structural body, and the microrelief structure layer has at least one physical property selected from the group consisting of (A) and (B) described below. (A) The elastic modulus at 25° C. is 50 MPa or more, and the elastic modulus at 80° C. is 30 MPa or less. (B) The tensile elongation at break at 80° C. is from 20% to 100% (inclusive).
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: November 27, 2018
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tsuyoshi Takihara, Eiko Okamoto
  • 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: 9902792
    Abstract: This dispersion-type acrylic copolymer has a matrix (I) formed of an acrylic copolymer having a glass transition temperature of 50° C. or higher and a polymer unit (II) formed of an acrylic copolymer having a glass transition temperature of less than 50° C., the polymer unit (II) forms localized regions having an average diameter of 5-300 nm in the matrix (I), the matrix (I) and polymer unit (II) contain units of a crosslinking component, and the content of these units of a crosslinking component is more than 2% by mass relative to the total weight of the acrylic copolymer.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: February 27, 2018
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Saori Kikuchi, Eiko Okamoto, Hiroshi Niino
  • 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
  • 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
  • Patent number: 9519082
    Abstract: In a protective film affixed to a microscopic roughness structure having a microscopically rough structure on the surface, water contact angle of the surface of the microscopic roughness structure is 40° or less, compressive stress obtainable when the adhesive layer of the protective film is compressed to a compression ratio of 20% is 0.6 MPa to 3.0 MPa; in the infrared absorption spectrum of the surface on the microscopically rough structure side of the microscopic roughness structure, ratio (A1/A2) of peak area A1 having absorption maximum of 3700 cm?1 to 3100 cm?1, and peak area A2 having absorption maximum of 1730±10 cm?1, is 0.1 to 0.8; in the surface of adhesive layer of the protective film, ratio (B1/B2) of peak area B1 having absorption maximum of 3700 cm?1 to 3100 cm?1, and peak area B2 having absorption maximum of 1730±10 cm?1, is 0.6 to 1.3.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: December 13, 2016
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Tsuyoshi Takihara, Seiichiro Mori, Eiko Okamoto
  • Publication number: 20160200846
    Abstract: This dispersion-type acrylic copolymer has a matrix (I) formed of an acrylic copolymer having a glass transition temperature of 50° C. or higher and a polymer unit (II) formed of an acrylic copolymer having a glass transition temperature of less than 50° C., the polymer unit (II) forms localized regions having an average diameter of 5-300 nm in the matrix (I), the matrix (I) and polymer unit (II) contain units of a crosslinking component, and the content of these units of a crosslinking component is more than 2% by mass relative to the total weight of the acrylic copolymer.
    Type: Application
    Filed: August 20, 2014
    Publication date: July 14, 2016
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Saori KIKUCHI, Eiko OKAMOTO, Hiroshi NIINO
  • Patent number: 9335445
    Abstract: The present invention relates to an antireflection article of which the first surface has sufficient abrasion resistance and can suppress reflectance to a low level throughout the visible light region, and a display device. The present invention relates to an antireflection article that has light transmittance, in which a plurality of convex portions are disposed on a first surface positioned at a visible side and a second surface opposite to the first surface, the average gap of the convex portions is 400 nm or less, the ratio (H1/W1) of the height H1 of the convex portions and the width W1 of the bottoms of the convex portions is 1.3 or more, in the first surface, and the ratio (H2/W2) of the height H2 of the convex portions and the width W2 of the bottoms of the convex portions is larger than the ratio (H1/W1), in the second surface.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: May 10, 2016
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventor: Eiko Okamoto
  • Patent number: 9290666
    Abstract: A laminate includes a substrate, and a surface layer laminated on the substrate with an intermediate layer sandwiched therebetween. The intermediate layer has a thickness of 8 to 40 ?m. The surface layer has a thickness 0.4 to 1.5 times that of the intermediate layer. The laminate satisfies the following (A) and/or (B): (A) tan ? (loss tangent) of the intermediate layer as measured under a condition of a vibration frequency of 1 Hz at 20° C. is 0.2 or greater; and (B) A ratio (MG/SG) of a storage modulus (MG) of the intermediate layer to a storage modulus (SG) of the surface layer as measured under a condition of a vibration frequency of 1 Hz at 20° C. is 0.003 or greater and 0.14 or less.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: March 22, 2016
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Tsuyoshi Takihara, Seiichiro Mori, Eiko Okamoto
  • Publication number: 20160052227
    Abstract: A structural body which comprises a base and a microrelief structure layer having a microrelief structure. The microrelief structure layer is laminated on the base so as to form the surface layer of this structural body, and the microrelief structure layer has at least one physical property selected from the group consisting of (A) and (B) described below. (A) The elastic modulus at 25° C. is 50 MPa or more, and the elastic modulus at 80° C. is 30 MPa or less. (B) The tensile elongation at break at 80° C. is from 20% to 100% (inclusive).
    Type: Application
    Filed: April 4, 2014
    Publication date: February 25, 2016
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Tsuyoshi TAKIHARA, Eiko OKAMOTO
  • Patent number: 9234065
    Abstract: The present invention provides an active energy ray-curable resin composition comprising at least a multifunctional monomer having three or more radical polymerizable functional groups in the molecule in which the cured product of the composition exhibits anti-reflective function because of an uneven microstructure formed on the surface of the cured product, and provides a product having the uneven microstructure having high decontaminating properties such as fingerprint removal properties and high scratch resistance.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: January 12, 2016
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Tsuyoshi Takihara, Eiko Okamoto, Go Otani, Yusuke Nakai
  • 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
  • Patent number: 9062142
    Abstract: The present invention provides an active energy ray-curable resin composition comprising at least a multifunctional monomer having three or more radical polymerizable functional groups in the molecule in which the cured product of the composition exhibits anti-reflective function because of an uneven microstructure formed on the surface of the cured product, and provides a product having the uneven microstructure having high decontaminating properties such as fingerprint removal properties and high scratch resistance.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: June 23, 2015
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Tsuyoshi Takihara, Eiko Okamoto, Go Otani, Yusuke Nakai