Patents by Inventor Tatsuhiro Suwa

Tatsuhiro Suwa 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: 8288450
    Abstract: An adhesive composition and an optical member, the adhesive composition including 100 parts by weight of a polymer prepared by polymerization of (meth)acrylic ester containing monomers; 0.01 to about 3 parts by weight of an antistatic agent containing an ionic compound and/or a lithium salt; 0 to about 1 part by weight of a silane coupling agent; and about 3 to about 20 parts by weight of a benzotriazole group containing compound; and about 0.05 to about 5 parts by weight of a cross-linking agent, or about 3 to about 30 parts by weight of a multifunctional (meth)acrylate monomer, and 0 to about 5 parts by weight of an active energy-ray initiator.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: October 16, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Cheong Hun Song, Hiroshi Ogawa, Tatsuhiro Suwa
  • Patent number: 8236872
    Abstract: A photocationically polymerizable adhesive composition and an optical member, the photocationically polymerizable adhesive composition including about 75 to about 99.8 parts by weight of a compound including one of aliphatic epoxy, alicyclic epoxy, oxetane, and vinyl ether compounds, about 0.1 to about 5 parts by weight of a titanate coupling agent, and about 0.1 to about 20 parts by weight of a photopolymerization initiator, wherein a sum of weights of the compound, the titanate coupling agent, and the photopolymerization initiator is 100 parts by weight.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: August 7, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Cheong Hun Song, Hiroshi Ogawa, Tatsuhiro Suwa
  • Patent number: 8217100
    Abstract: An adhesive composition includes an antistatic agent that includes an ionic compound having a melting point of 50° C. or more, and a base polymer having a glass transition temperature of 0° C. or less.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: July 10, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Hiroshi Ogawa, Tatsuhiro Suwa, Cheong Hun Song
  • Publication number: 20120108734
    Abstract: An adhesive composition, an optical member, a surface protective film, and an adhesive sheet, the adhesive composition including 100 parts by weight of a (meth)acrylic copolymer having a weight average molecular weight of about 100,000 to about 2,000,000 g/mol; about 0.01 to about 5 parts by weight of a peroxide crosslinking agent; and about 0.001 to about 5 parts by weight of a carbodiimide.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 3, 2012
    Inventors: Hiroshi OGAWA, Tatsuhiro Suwa
  • Publication number: 20120108733
    Abstract: An adhesive composition, an optical member, a surface protective film, and an adhesive sheet, the adhesive composition including 100 parts by weight of a (meth)acrylic copolymer having a weight average molecular weight of about 100,000 to about 2,000,000 g/mol; about 0.05 to about 5 parts by weight of a carbodiimide crosslinker, based on 100 parts by weight of the (meth)acrylic copolymer; and about 0.001 to about 5 parts by weight of an imidazole compound represented by Formula 1, based on 100 parts by weight of the (meth)acrylic copolymer: wherein, in Formula 1, R1, R2, and R3 are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted C1 to C10 straight or branched alkyl group.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 3, 2012
    Inventors: Tatsuhiro SUWA, Hiroshi Ogawa
  • Patent number: 8168704
    Abstract: An adhesive composition includes a base polymer, the base polymer including a copolymer having at least one (meth)acrylic ester with a halogen element and at least one (meth)acrylate in a copolymeric unit, and an antistatic agent, the antistatic agent including an ionic compound.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: May 1, 2012
    Assignee: Cheil Industries, Inc.
    Inventors: Hiroshi Ogawa, Tatsuhiro Suwa, Cheong Hun Song
  • Publication number: 20120004369
    Abstract: An adhesive composition includes a (meth)acrylic copolymer, the (meth)acrylic copolymer containing about 92 to about 99.7 parts by weight of a moiety derived from a (meth)acrylic acid ester monomer, and about 0.3 to about 8 parts by weight of at least one of a moiety derived from a carboxyl group-containing monomer and a moiety derived from a hydroxyl group-containing (meth)acrylic acid monomer, the (meth)acrylic copolymer having a weight average molecular weight of about 500,000 g/mol to about 2,000,000 g/mol, a carbodiimide curing agent, and an oligomeric silane coupling agent.
    Type: Application
    Filed: July 5, 2011
    Publication date: January 5, 2012
    Inventors: Hiroshi OGAWA, Tatsuhiro Suwa, Cheong Hun Song
  • Publication number: 20110245364
    Abstract: An adhesive composition and an optical member, the adhesive composition including 100 parts by weight of a polymer prepared by polymerization of (meth)acrylic ester containing monomers; 0.01 to about 3 parts by weight of an antistatic agent containing an ionic compound and/or a lithium salt; 0 to about 1 part by weight of a silane coupling agent; and about 3 to about 20 parts by weight of a benzotriazole group containing compound; and about 0.05 to about 5 parts by weight of a cross-linking agent, or about 3 to about 30 parts by weight of a multifunctional (meth)acrylate monomer, and 0 to about 5 parts by weight of an active energy-ray initiator.
    Type: Application
    Filed: June 13, 2011
    Publication date: October 6, 2011
    Inventors: Cheong Hun Song, Hiroshi Ogawa, Tatsuhiro Suwa
  • Publication number: 20110195249
    Abstract: A photocationically polymerizable adhesive composition and an optical member, the photocationically polymerizable adhesive composition including about 75 to about 99.8 parts by weight of a compound including one of aliphatic epoxy, alicyclic epoxy, oxetane, and vinyl ether compounds, about 0.1 to about 5 parts by weight of a titanate coupling agent, and about 0.1 to about 20 parts by weight of a photopolymerization initiator, wherein a sum of weights of the compound, the titanate coupling agent, and the photopolymerization initiator is 100 parts by weight.
    Type: Application
    Filed: April 22, 2011
    Publication date: August 11, 2011
    Inventors: Cheong Hun SONG, Hiroshi Ogawa, Tatsuhiro Suwa
  • Publication number: 20100239859
    Abstract: An adhesive composition includes a copolymer (A), the copolymer (A) being a copolymer of: a hydroxyl group-containing (meth)acrylamide (a1), the hydroxyl group-containing (meth)acrylamide (a1) including at least one of a hydroxyl group-containing acrylamide and a hydroxyl group-containing methacrylamide, and a (meth)acrylate (a2), the (meth)acrylate (a2) including at least one of an acrylic ester and a methacrylic ester; and an antistatic agent (B), the antistatic agent (B) including an ionic compound.
    Type: Application
    Filed: May 24, 2010
    Publication date: September 23, 2010
    Inventors: Cheong Hun Song, Tatsuhiro Suwa, Hiroshi Ogawa
  • Publication number: 20090053519
    Abstract: An adhesive composition includes a base polymer, the base polymer including a copolymer having at least one (meth)acrylic ester with a halogen element and at least one (meth)acrylate in a copolymeric unit, and an antistatic agent, the antistatic agent including an ionic compound.
    Type: Application
    Filed: August 12, 2008
    Publication date: February 26, 2009
    Inventors: Hiroshi Ogawa, Tatsuhiro Suwa, Cheong Hun Song
  • Publication number: 20090014123
    Abstract: An adhesive composition includes an antistatic agent that includes an ionic compound having a melting point of 50° C. or more, and a base polymer having a glass transition temperature of 0° C. or less.
    Type: Application
    Filed: July 14, 2008
    Publication date: January 15, 2009
    Inventors: Hiroshi Ogawa, Tatsuhiro Suwa, Cheong Hun Song
  • Patent number: 6699565
    Abstract: The pressure sensitive transferring adhesive tape which transfers adhesive agent layer alone to an adherent is widely well-known, and in this case, the adhesive agent layer applied to a supporter has to be cut after it has been transferred to the adherent. However, since the adhesive layer is coated continuously, this type has a weak point that the adhesive agent layer causes problem of stringiness and stretching and cannot be cut smoothly. In the present invention, above mentioned weak points are dissolved by coating adhesive agent layer by discontinuous island shape pattern or by making the surface of adhesive agent layer to have concave and convex shape.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: March 2, 2004
    Assignee: Tombow Pencil Co., Ltd.
    Inventors: Hidetatsu Kikuchi, Koujirou Matsushima, Kazunobu Tanaka, Minoru Enomoto, Tatsuhiro Suwa
  • Publication number: 20020182373
    Abstract: The pressure sensitive transferring adhesive tape which transfers adhesive agent layer alone to an adherent is widely well-known, and in this case, the adhesive agent layer applied to a supporter has to be cut after it has been transferred to the adherent. However, since the adhesive layer is coated continuously, this type has a weak point that the adhesive agent layer causes problem of stringiness and stretching and cannot be cut smoothly. In the present invention, above mentioned weak points are dissolved by coating adhesive agent layer by discontinuous island shape pattern or by making the surface of adhesive agent layer to have concave and convex shape.
    Type: Application
    Filed: September 5, 2001
    Publication date: December 5, 2002
    Inventors: Hidetatsu Kikuchi, Koujirou Matsushima, Kazunobu Tanaka, Minoru Enomoto, Tatsuhiro Suwa