Patents by Inventor Yuuhei Konokawa

Yuuhei Konokawa 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: 10654962
    Abstract: An acrylic film having few fish eyes and a method for producing latex of an acrylic rubber-containing polymer having low amounts of coarse particles, excellent filtering properties, and low filter clogging frequency during a filtration step for removing foreign substances. An acrylic film containing an acrylic rubber-containing polymer and a thickness of 30 to 300 ?m, wherein the number of fish eyes that are 0.001 mm2 or greater in size is 130/m2 or fewer when a section having a light transmission rate of 75% or less for light having a wavelength of 400 to 1100 nm was detected as a fish eye A laminate film formed by laminating the acrylic film and a layer of at least one resin selected from thermoplastic resin, thermosetting resin, and photo curable resin. A laminated injection molded article formed by laminating the acrylic film on an injection molded article.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: May 19, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Naomi Hara, Masato Yamamoto, Hidehito Shimonaka, Yuuhei Konokawa
  • Patent number: 10450396
    Abstract: An acrylic film having few fish eyes and a method for producing latex of an acrylic rubber-containing polymer having low amounts of coarse particles, excellent filtering properties, and low filter clogging frequency during a filtration step for removing foreign substances are provided. An acrylic film containing an acrylic rubber-containing polymer (G) has a thickness of 30 to 300 ?m, wherein the number of fish eyes that are 0.001 mm2 or greater in size is 130/m2 or fewer when a section having a light transmission rate of 75% or less for light having a wavelength of 400 to 1100 nm was detected as a fish eye.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: October 22, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Naomi Hara, Masato Yamamoto, Hidehito Shimonaka, Yuuhei Konokawa
  • Publication number: 20170190822
    Abstract: An acrylic film having few fish eyes and a method for producing latex of an acrylic rubber-containing polymer having low amounts of coarse particles, excellent filtering properties, and low filter clogging frequency during a filtration step for removing foreign substances are provided. An acrylic film containing an acrylic rubber-containing polymer (G) has a thickness of 30 to 300 ?m, wherein the number of fish eyes that are 0.001 mm2 or greater in size is 130/m2 or fewer when a section having a light transmission rate of 75% or less for light having a wavelength of 400 to 1100 nm was detected as a fish eye.
    Type: Application
    Filed: March 17, 2017
    Publication date: July 6, 2017
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Naomi Hara, Masato Yamamoto, Hidehito Shimonaka, Yuuhei Konokawa
  • Publication number: 20150240014
    Abstract: An acrylic film having few fish eyes and a method for producing latex of an acrylic rubber-containing polymer having low amounts of coarse particles, excellent filtering properties, and low filter clogging frequency during a filtration step for removing foreign substances. An acrylic film containing an acrylic rubber-containing polymer and a thickness of 30 to 300 ?m, wherein the number of fish eyes that are 0.001 mm2 or greater in size is 130/m2 or fewer when a section having a light transmission rate of 75% or less for light having a wavelength of 400 to 1100 nm was detected as a fish eye A laminate film formed by laminating the acrylic film and a layer of at least one resin selected from thermoplastic resin, thermosetting resin, and photo curable resin. A laminated injection molded article formed by laminating the acrylic film on an injection molded article.
    Type: Application
    Filed: September 6, 2013
    Publication date: August 27, 2015
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Naomi Hara, Masato Yamamoto, Hidehito Shimonaka, Yuuhei Konokawa
  • Patent number: 8795843
    Abstract: Provided is an acrylic film for punching excellent in transparency and free from breakage or whitening even if it is punched. The present invention is an acrylic film for punching containing a polymer (C) containing a di(meth)acrylate (A) unit represented by general formula (1) below and a mono(meth)acrylate (B) unit: —CH2—CR1—COO—(X)n—COCR1—CH2—??(1) wherein (X) represents at least one repeat unit selected from C2H4O, C3H6O and C4H8O; the molecular weight of (X)n is 500 or more; and R1 represents H or CH3.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: August 5, 2014
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yuuhei Konokawa, Yoshiaki Satou, Kousuke Fujiyama, Yasuhiko Nabeshima, Tomoyoshi Yamashita
  • Patent number: 8642676
    Abstract: A polymerizable composition comprising a syrup composition (?) and a polymerization initiator (?), wherein the syrup composition (?) contains a copolymer (C) and at least one (meth)acrylate selected from a di(meth)acrylate (A) represented by the general formula (1) and a mono(meth)acrylate (B), wherein the copolymer (C) is obtained by polymerization of a monomer mixture containing 1 to 60 wt % of the di(meth)acrylate (A) represented by the following general formula (1): CH2?CR1—COO—(X)—COCR1?CH2 (1) (wherein, (X) represents at least one residue selected from a polyalkylene glycol, a polyester diol and a polycarbonate diol having a number-average molecular weight of 500 or more, and R1 represents H or CH3) and 40 to 99 wt % of the mono(meth)acrylate (B); and an acrylic resin film 1 having flexibility and high transparency obtained by polymerizing and curing the polymerizable composition.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: February 4, 2014
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yuuhei Konokawa, Kousuke Fujiyama, Yasuhiko Nabeshima
  • Publication number: 20120225971
    Abstract: A polymerizable composition comprising a syrup composition (?) and a polymerization initiator (?), wherein the syrup composition (?) contains a copolymer (C) and at least one (meth)acrylate selected from a di(meth)acrylate (A) represented by the general formula (1) and a mono(meth)acrylate (B), wherein the copolymer (C) is obtained by polymerization of a monomer mixture containing 1 to 60 wt % of the di(meth) acrylate (A) represented by the following general formula (1): CH2?CR1—COO—(X)—COCR1?CH2 (1) (wherein, (X) represents at least one residue selected from a polyalkylene glycol, a polyester diol and a polycarbonate diol having a number-average molecular weight of 500 or more, and R1 represents H or CH3) and 40 to 99 wt % of the mono(meth)acrylate (B); and an acrylic resin film 1 having flexibility and high transparency obtained by polymerizing and curing the polymerizable composition.
    Type: Application
    Filed: September 10, 2010
    Publication date: September 6, 2012
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Yuuhei Konokawa, Kousuke Fujiyama, Yasuhiko Nabeshima
  • Publication number: 20120127757
    Abstract: Provided is an acrylic film for punching excellent in transparency and free from breakage or whitening even if it is punched. The present invention is an acrylic film for punching containing a polymer (C) containing a di(meth)acrylate (A) unit represented by general formula (1) below and a mono(meth)acrylate (B) unit: —CH2—CR1—COO—(X)n—COCR1—CH2—??(1) wherein (X) represents at least one repeat unit selected from C2H4O, C3H6O and C4H8O; the molecular weight of (X)n is 500 or more; and R1 represents H or CH3.
    Type: Application
    Filed: July 9, 2010
    Publication date: May 24, 2012
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Yuuhei Konokawa, Yoshiaki Satou, Kousuke Fujiyama, Yasuhiko Nabeshima, Tomoyoshi Yamashita