Patents by Inventor Namiko Murayama

Namiko Murayama 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).

  • Medical adhesive and medical adhesive tape or sheet
    Patent number: 7897683
    Abstract: The present invention provides a medical adhesive and a medical adhesive tape or sheet superior in the fixing performance, particularly perspiration-resistant fixing, which shows low skin irritation and suitable adhesive strength. The present invention provides a medical adhesive containing a water-dispersed copolymer obtained by copolymerizing 100 parts by weight of a monomer mixture containing (meth)acrylic acid alkyl ester and 0.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: March 1, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Atsushi Hamada, Tomonari Naito, Namiko Murayama, Miki Funahashi, Jun Ishikura
  • Aqueous dispersion adhesive composition and adhesive film
    Patent number: 7858709
    Abstract: The aqueous dispersion adhesive composition contains an aqueous dispersion copolymer obtained by reacting of a reaction component containing alkyl (meth)acrylate whose linear or branched alkyl group has 4 to 18 carbon atoms, (meth)acrylic acid, a phosphoric acid group-containing vinyl monomer and an alkoxysilyl group-containing vinyl monomer to react; and a crosslinking agent having reactivity with a carboxyl group. In the aqueous dispersion adhesive composition, an amount of the crosslinking agent is from 0.07 to 4 parts by weight per 100 parts by weight of the aqueous dispersion copolymer, and in an adhesive layer made of the aqueous dispersion adhesive composition, an elongation at 90° C. is 200% or less.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: December 28, 2010
    Assignee: Nitto Denko Corporation
    Inventors: Toshitaka Takahasi, Kenichi Okada, Yousuke Makihata, Kuniaki Inui, Taiki Shimokuri, Mika Okada, Namiko Murayama
  • Aqueous dispersion adhesive composition and adhesive film
    Publication number: 20080281038
    Abstract: The aqueous dispersion adhesive composition contains an aqueous dispersion copolymer obtained by reacting of a reaction component containing alkyl (meth)acrylate whose linear or branched alkyl group has 4 to 18 carbon atoms, (meth)acrylic acid, a phosphoric acid group-containing vinyl monomer and an alkoxysilyl group-containing vinyl monomer to react; and a crosslinking agent having reactivity with a carboxyl group. In the aqueous dispersion adhesive composition, an amount of the crosslinking agent is from 0.07 to 4 parts by weight per 100 parts by weight of the aqueous dispersion copolymer, and in an adhesive layer made of the aqueous dispersion adhesive composition, an elongation at 90° C. is 200% or less.
    Type: Application
    Filed: May 1, 2008
    Publication date: November 13, 2008
    Applicant: Nitto Denko Corporation
    Inventors: Toshitaka Takahashi, Kenichi Okada, Yousuke Makihata, Kuniaki Inui, Taiki Shimokuri, Mika Okada, Namiko Murayama
  • Medical adhesive and medical adhesive tape or sheet
    Publication number: 20070275239
    Abstract: The present invention provides a medical adhesive and a medical adhesive tape or sheet superior in the fixing performance, particularly perspiration-resistant fixing, which shows low skin irritation and suitable adhesive strength. The present invention provides a medical adhesive containing a water-dispersed copolymer obtained by copolymerizing 100 parts by weight of a monomer mixture containing (meth)acrylic acid alkyl ester and 0.
    Type: Application
    Filed: May 21, 2007
    Publication date: November 29, 2007
    Inventors: Atsushi Hamada, Tomonari Naito, Namiko Murayama, Miki Funahashi, Jun Ishikura