Patents by Inventor Yasunobu Hirota

Yasunobu Hirota 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: 20170327720
    Abstract: The invention provides an adhesive coating material which realizes excellent adhesive strength and moist-heat resistance at the time of bonding a solar cell sealing material and a base sheet, a polyol composition for the coating material, a cured object of the adhesive coating material, an adhesive sheet obtained by being coated with adhesive coating material, and a solar cell module using the sheet. As a polyol component of the adhesive coating material which forms an adhesive layer b in a back sheet E of the solar cell module illustrated in Figure, a hydroxyl group-containing (meth)acrylic resin (I) and unsaturated double bond-containing polyester polyol (II) are used as essential components.
    Type: Application
    Filed: February 25, 2016
    Publication date: November 16, 2017
    Applicant: DIC CORPORATION
    Inventors: Miho Takeda, Takatoshi Matsuo, Tatsuya Kouyama, Kan Takeuchi, Yasunobu Hirota
  • Patent number: 8067477
    Abstract: An object of the present invention is to provide the resin composition for electro-photographic toner, which the electro-photographic toner to be obtained by it is superior to low temperature fixing properties and a hot offset resistance, and the electro-photographic toner thereof. To be achieved this purpose, multi-branched state polyester structure having a structure representing the following structural formula (1) as a repeating unit, is made into a main skeleton (In the formula, R expresses an aliphatic hydrocarbon group, and n shows the number of repeating units of a branched structure and is an average of 1-5.) *a is a node of the carbon atom of a carbonyl group, *b is a node of an oxygen atom, and *b is bonded to *a in the other repeating unit of the structural formula (1)).
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: November 29, 2011
    Assignee: DIC Corporation
    Inventors: Yasunobu Hirota, Nobuyoshi Shirai
  • Publication number: 20100297547
    Abstract: An object of the present invention is to provide the resin composition for electro-photographic toner, which the electro-photographic toner to be obtained by it is superior to low temperature fixing properties and a hot offset resistance, and the electro-photographic toner thereof. To be achieved this purpose, multi-branched state polyester structure having a structure representing the following structural formula (1) as a repeating unit, is made into a main skeleton (In the formula, R expresses an aliphatic hydrocarbon group, and n shows the number of repeating units of a branched structure and is an average of 1-5.) *a is a node of the carbon atom of a carbonyl group, *b is a node of an oxygen atom, and *b is bonded to *a in the other repeating unit of the structural formula (1)).
    Type: Application
    Filed: January 22, 2009
    Publication date: November 25, 2010
    Applicant: DIC CORPORATION
    Inventors: Yasunobu Hirota, Nobuyoshi Shirai
  • Patent number: 6809889
    Abstract: A radiation curable resin composition for a Fresnel lens is provided, which exhibits a high elastic modulus and a high refractive index and is superior in adhesion to the plastic substrate and is superior in transparency. A lens layer exhibits excellent shape retention over a wide temperature range and is less likely to chip and crack due to an external force. A Fresnel lens sheet using the radiation curable resin composition is also provided. The resin composition comprises, as an essential component, an epoxy (meth)acrylate (a) having an epoxy equivalent per weight of 450 g/eq or more, which has a cyclic structure and two or more (meth)acryloyl groups; a specific trifunctional (meth)acrylate (b); a (meth)acrylate (c) having a molecular weight of 700 or less from an aliphatic polyhydric alcohol having an oxypropylene structure; and a monofunctional (meth)acrylate (d) having a cyclic structure.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: October 26, 2004
    Assignees: Dainippon Ink and Chemicals, Inc., Dai Nippon Printing Co., Ltd.
    Inventors: Hiroyuki Tokuda, Yasunobu Hirota, Yasuhiro Doi
  • Publication number: 20040096757
    Abstract: An object of the present invention is to provide a photosensitive resin composition or a photosensitive resist for color filters which is superior in heat resistance, water resistance, solvent resistance, chemical resistance, and also transparency, and a method for producing color filters using them. The present invention relates to a photosensitive resin composition comprising a vinyl polymer (A) having at least one cyclocarbonate group and at least one carboxyl group in the molecule and a compound (B) having at least two ethylenically unsaturated double bonds in the molecule as a main component, which can introduce crosslinked structures by photocuring and thermosetting, a photosensitive resist for color filters comprising the photosensitive resin composition and a colorant, and a method for producing a color filter, using the photosensitive resist for color filters.
    Type: Application
    Filed: September 25, 2003
    Publication date: May 20, 2004
    Inventors: Hiroyuki Tokuda, Yasunobu Hirota, Hidenobu Ishikawa
  • Publication number: 20030113544
    Abstract: A radiation curable resin composition for a Fresnel lens is provided, which exhibits a high elastic modulus and a high refractive index and is superior in adhesion to the plastic substrate and is superior in transparency. A lens layer exhibits excellent shape retention over a wide temperature range and is less likely to chip and crack due to an external force. A Fresnel lens sheet using the radiation curable resin composition is also provided. The resin composition comprises, as an essential component, an epoxy (meth)acrylate (a) having an epoxy equivalent per weight of 450 g/eq or more, which has a cyclic structure and two or more (meth)acryloyl groups; a specific trifunctional (meth)acrylate (b); a (meth)acrylate (c) having a molecular weight of 700 or less from an aliphatic polyhydric alcohol having an oxypropylene structure; and a monofunctional (meth)acrylate (d) having a cyclic structure.
    Type: Application
    Filed: October 16, 2002
    Publication date: June 19, 2003
    Applicants: DAINIPPON INK AND CHEMICALS, INC., DAI NIPPON PRINTING CO., LTD.
    Inventors: Hiroyuki Tokuda, Yasunobu Hirota, Yasuhiro Doi
  • Patent number: 6524757
    Abstract: An object is to provide a color filter which is capable of forming a pattern using an alkaline developer and has excellent heat resistance, solvent resistance and chemical resistance, and is also suitable for practical use. The color filter comprises a transparent substrate and a pixel formed on the transparent substrate, wherein the pixel is made of a coating film of a curable colored composition containing (a) a coloring material, (b) a compound having a photopolymerizable functional group and (c) an amino resin having a carboxyl group and/or a phenolic hydroxyl group and the coating layer is photocured, followed by heat curing.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: February 25, 2003
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Junichiro Koike, Hisatomo Yonehara, Hiroyuki Tokuda, Yasunobu Hirota
  • Publication number: 20020025481
    Abstract: An object is to provide a color filter which is capable of forming a pattern using an alkaline developer and has excellent heat resistance, solvent resistance and chemical resistance, and is also suitable for practical use. The color filter comprises a transparent substrate and a pixel formed on the transparent substrate, wherein the pixel is made of a coating film of a curable colored composition containing (a) a coloring material, (b) a compound having a photopolymerizable functional group and (c) an amino resin having a carboxyl group and/or a phenolic hydroxyl group and the coating layer is photocured, followed by heat curing.
    Type: Application
    Filed: July 11, 2001
    Publication date: February 28, 2002
    Applicant: Dainippon Ink and Chemicals, Inc.
    Inventors: Junichiro Koike, Hisatomo Yonehara, Hiroyuki Tokuda, Yasunobu Hirota