Patents by Inventor Yukiko Ishima

Yukiko Ishima 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: 10072164
    Abstract: An object of the present invention is to provide: a pigment dispersion liquid for inkjet ink, which is stable for a long period of storage and which increases repellency to ink ejection surface. Disclosed is a pigment dispersion liquid for inkjet ink, comprising: a pigment; a pigment dispersing agent; and a compound having an ethylenically unsaturated double bond, wherein the pigment dispersing agent has an amine value of 20 mgKOH/g or less and an acid value of 10 mgKOH/g or less, contains one or more components selected from the group consisting of: a copolymer having a styrene-derived repeating unit, a repeating unit derived from an unsaturated fatty acid having 12 or more carbon atoms, and a repeating unit derived from a polyalkylene oxide having an ethylenically unsaturated double bond; a specific salt of the copolymer and an amine derivative of the copolymer.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: September 11, 2018
    Assignee: DNP FINE CHEMICALS CO., LTD.
    Inventors: Yukiko Ishima, Keishiro Yoshimori, Yukio Sugita
  • Patent number: 9815991
    Abstract: An ink composition for inkjet recording, including: a color material, a binder resin, and an organic solvent, wherein the binder resin contains at least an acrylic-based resin (A), and a copolymer (B) having a constitutional unit derived from a hydroxyalkyl (meth)acrylate, a constitutional unit represented by the formula (I), and a constitutional unit represented by the formula (II), a content ratio by mass of the resin (A) to copolymer (B) is 25/75 to 70/30, and wherein the solvent contains at least a polyalkylene glycol dialkyl ether and a cyclic ester, a content ratio of the cyclic ester is 3 parts by mass or more and 10 parts by mass or less relative to 100 parts by mass of the ink composition, and a content ratio of the ethylene glycol alkyl ether acetate is 5 parts by mass or less relative to 100 parts by mass of the ink composition:
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: November 14, 2017
    Assignee: DNP FINE CHEMICALS CO., LTD.
    Inventors: Megumi Oogaki, Shinichi Yoshimitsu, Katsumi Watanabe, Ryohei Oka, Yukiko Ishima, Karuna Iwasawa
  • Publication number: 20170015849
    Abstract: The present invention provides an ink composition for inkjet recording with which high-speed printing is possible while maintaining the quality of a printed material.
    Type: Application
    Filed: February 25, 2015
    Publication date: January 19, 2017
    Inventors: Megumi OOGAKI, Shinichi YOSHIMITSU, Katsumi WATANABE, Ryohei OKA, Yukiko ISHIMA, Karuna IWASAWA
  • Publication number: 20170009089
    Abstract: An object of the present invention is to provide: a pigment dispersion liquid for inkjet ink, which is stable for a long period of storage and which increases repellency to ink ejection surface. Disclosed is a pigment dispersion liquid for inkjet ink, comprising: a pigment; a pigment dispersing agent; and a compound having an ethylenically unsaturated double bond, wherein the pigment dispersing agent has an amine value of 20 mgKOH/g or less and an acid value of 10 mgKOH/g or less, contains one or more components selected from the group consisting of: a copolymer having a styrene-derived repeating unit, a repeating unit derived from an unsaturated fatty acid having 12 or more carbon atoms, and a repeating unit derived from a polyalkylene oxide having an ethylenically unsaturated double bond; a specific salt of the copolymer and an amine derivative of the copolymer.
    Type: Application
    Filed: September 21, 2016
    Publication date: January 12, 2017
    Inventors: Yukiko ISHIMA, Keishiro YOSHIMORI, Yukio SUGITA
  • Patent number: 9487665
    Abstract: An object of the present invention is to provide: a pigment dispersion liquid for inkjet ink, which is stable for a long period of storage and which increases repellency to ink ejection surface. Disclosed is a pigment dispersion liquid for inkjet ink, comprising: a pigment; a pigment dispersing agent; and a compound having an ethylenically unsaturated double bond, wherein the pigment dispersing agent has an amine value of 20 mgKOH/g or less and an acid value of 10 mgKOH/g or less, contains one or more components selected from the group consisting of: a copolymer having a styrene-derived repeating unit, a repeating unit derived from an unsaturated fatty acid having 12 or more carbon atoms, and a repeating unit derived from a polyalkylene oxide having an ethylenically unsaturated double bond; a specific salt of the copolymer and an amine derivative of the copolymer.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: November 8, 2016
    Assignee: DNP FINE CHEMICALS CO., LTD.
    Inventors: Yukiko Ishima, Keishiro Yoshimori, Yukio Sugita
  • Publication number: 20150030825
    Abstract: An object of the present invention is to provide: a pigment dispersion liquid for inkjet ink, which is stable for a long period of storage and which increases repellency to ink ejection surface. Disclosed is a pigment dispersion liquid for inkjet ink, comprising: a pigment; a pigment dispersing agent; and a compound having an ethylenically unsaturated double bond, wherein the pigment dispersing agent has an amine value of 20 mgKOH/g or less and an acid value of 10 mgKOH/g or less, contains one or more components selected from the group consisting of: a copolymer having a styrene-derived repeating unit, a repeating unit derived from an unsaturated fatty acid having 12 or more carbon atoms, and a repeating unit derived from a polyalkylene oxide having an ethylenically unsaturated double bond; a specific salt of the copolymer and an amine derivative of the copolymer.
    Type: Application
    Filed: February 5, 2013
    Publication date: January 29, 2015
    Inventors: Yukiko Ishima, Keishiro Yoshimori, Yukio Sugita
  • Publication number: 20120077896
    Abstract: The object to be achieved by the present invention is to provide an active energy ray curable-type inkjet recording ink composition that is used for recording on a glass surface and is excellent in adhesiveness to the glass surface and water resistance and alcohol resistance. The active energy ray curable-type inkjet recording ink composition of the present invention at least contains: (b) photopolymerization initiator; 40 to 75 percent by mass of (d) cyclic monofunctional (meth)acrylate; 5 to 20 percent by mass of (e) hydroxyl group-containing (meth)acrylate; and 3 to 10 percent by mass of (c) epoxy group-containing silane coupling agent. The active energy ray curable-type inkjet recording ink composition is used for recording on a glass surface.
    Type: Application
    Filed: June 2, 2010
    Publication date: March 29, 2012
    Applicant: DNP FINE CHEMICALS CO LTD
    Inventor: Yukiko Ishima