Patents by Inventor Tadasu Kawashima

Tadasu Kawashima 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: 20120305178
    Abstract: An anisotropic electrically conductive adhesive film for establishing electrically conductive interconnection between electronic components includes a first peel film having a first peel layer on its one surface, and an adhesive layer provided on the first peel film via the first peel layer. The adhesive layer is formed of an anisotropic electrically conductive adhesive material. The adhesive film also includes a second peel film having a second peel layer on its one surface. The second peel film is provided via the second peel layer on a surface of the adhesive layer opposite to the surface of the adhesive layer provided with the first peel film. The first and second peel films have a non-contractile biodegradable film composed of a fatty acid polyester component as a base material. The first and second peel layers formed of a thermosetting silicone resin curable are provided on each top of the base material.
    Type: Application
    Filed: June 7, 2012
    Publication date: December 6, 2012
    Applicant: SONY CHEMICAL & INFORMATION DEVICE CORPORATION
    Inventors: Minoru Nagashima, Tadasu Kawashima
  • Patent number: 8211330
    Abstract: A latent epoxy resin curing agent is provided which can be manufactured without using an amphiphilic polymer compound requiring a painful trial and error selection process, exhibits excellent solvent resistance and low-temperature fast-curing ability, and contains an imidazole-based compound as a main component. In the latent epoxy resin curing agent containing the imidazole-based compound as a main component, the adduct particles of the epoxy-based compound and the imidazole-based compound are coated with an ethyl cellulose film, and the surface thereof is crosslinked with a polyfunctional isocyanate compound. The epoxy-based compound, the imidazole-based compound, and ethyl cellulose are dissolved in a predetermined saturated hydrocarbon-based solvent under stirring and heating. Then, the epoxy-based compound and the imidazole-based compound are subjected to adduct reaction to obtain a slurry of the adduct.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: July 3, 2012
    Assignee: Sony Chemical & Information Device Corporation
    Inventors: Daisuke Masuko, Katsuhiko Komuro, Masahiko Ito, Tadasu Kawashima
  • Patent number: 8128837
    Abstract: A latent epoxy resin curing agent is provided which exhibits excellent solvent resistance and low-temperature fast-curing ability, and contains an imidazole-based compound as a main component. In the latent epoxy resin curing agent containing the imidazole-based compound as a main component, adduct particles formed through adduct reaction of an epoxy-based compound with the particulate imidazole-based compound are coated with an ethyl cellulose film. Furthermore, the surfaces of the adduct particles may be crosslinked with a polyfunctional isocyanate compound. A mixture of the epoxy-based compound, the particulate imidazole-based compound, and ethyl cellulose in a predetermined saturated hydrocarbon-based solvent is heated under stirring. Then, the epoxy-based compound and the particulate imidazole-based compound are subjected to adduct reaction to give a slurry of the adduct. After the slurry is cooled, the latent epoxy resin curing agent is filtrated.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: March 6, 2012
    Assignees: Sony Corporation, Sony Corporation & Information Device Corporation
    Inventors: Daisuke Masuko, Katsuhiko Komuro, Masahiko Ito, Tadasu Kawashima
  • Publication number: 20100129582
    Abstract: Disclosed is an anisotropic electrically conductive adhesive film for establishing electrically conductive interconnection between electronic components. The adhesive film includes a first peel film (2) having a first peel layer (5) on its one surface, and an adhesive layer (3) provided on the first peel film (2) via the first peel layer (5). The adhesive layer is formed of an anisotropic electrically conductive adhesive material. The adhesive film also includes a second peel film (4) having a second peel layer (6) on its one surface. The second peel film (4) is provided via the second peel layer (6) on a surface of the adhesive layer (3) opposite to the surface of the adhesive layer provided with the first peel film (2). The first and second peel films (2), (4) have a non-contractile biodegradable film composed of a fatty acid polyester component as a base material. The first and second peel layers (5), (6), formed of a thermosetting silicone resin curable at a temperature not lower than 100° C.
    Type: Application
    Filed: April 22, 2008
    Publication date: May 27, 2010
    Applicant: SONY CHEMICAL & INFORMATION DEVICE CORPORATION
    Inventors: Minoru Nagashima, Tadasu Kawashima
  • Publication number: 20090230360
    Abstract: An aluminum chelate-based latent curing agent, which can cure a thermosetting epoxy resin at a relatively low temperature in a short time, is made latent by reacting a silsesquioxane-type oxetane derivative with an aluminum chelating agent in the presence of an alicyclic epoxy compound, and then further reacting the resultant mixture with a liquid epoxy resin and an imidazole compound or with an aromatic vinyl compound and a radical polymerization initiator.
    Type: Application
    Filed: January 17, 2008
    Publication date: September 17, 2009
    Applicant: SONY CHEMICAL & INFORMATION DEVICE CORPORATION
    Inventors: Katsuhiko Komuro, Masahiko Ito, Tadasu Kawashima, Daisuke Masuko
  • Patent number: 7557230
    Abstract: An aluminum chelate-based latent curing agent capable of curing a thermosetting epoxy resin under the condition of relatively low temperature in a short period of time is provided. Furthermore, a method for manufacturing the latent curing agent is provided, in which the curing conditions of the aluminum chelate-based latent curing agent can be controlled relatively easily. The aluminum chelate-based latent curing agent is prepared by reacting an aluminum chelate agent with a silsesquioxane type oxetane derivative in the presence of a water insoluble or poorly water-soluble cellulose ether, whereby latency properties are imparted thereto. This latent curing agent contains a coating layer composed of the water insoluble or poorly water-soluble cellulose ether. Preferably, the surface is treated with an isocyanate compound.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: July 7, 2009
    Assignees: Sony Corporation, Sony Chemical & Information Device Corporation
    Inventors: Katsuhiko Komuro, Tadasu Kawashima, Masahiko Ito, Daisuke Masuko
  • Publication number: 20080249257
    Abstract: A latent epoxy resin curing agent is provided which can be manufactured without using an amphiphilic polymer compound requiring a painful trial and error selection process, exhibits excellent solvent resistance and low-temperature fast-curing ability, and contains an imidazole-based compound as a main component. In the latent epoxy resin curing agent containing the imidazole-based compound as a main component, adduct particles formed through adduct reaction of an epoxy-based compound with the particulate imidazole-based compound are coated with an ethyl cellulose film. Furthermore, the surfaces of the adduct particles may be crosslinked with a polyfunctional isocyanate compound. A mixture of the epoxy-based compound, the particulate imidazole-based compound, and ethyl cellulose in a predetermined saturated hydrocarbon-based solvent is heated under stirring. Then, the epoxy-based compound and the particulate imidazole-based compound are subjected to adduct reaction to give a slurry of the adduct.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 9, 2008
    Applicant: SONY CHEMICAL & INFORMATION DEVICE CORPORATION
    Inventors: Daisuke Masuko, Katsuhiko Komuro, Masahiko Ito, Tadasu Kawashima
  • Publication number: 20080249258
    Abstract: A latent epoxy resin curing agent is provided which can be manufactured without using an amphiphilic polymer compound requiring a painful trial and error selection process, exhibits excellent solvent resistance and low-temperature fast-curing ability, and contains an imidazole-based compound as a main component. In the latent epoxy resin curing agent containing the imidazole-based compound as a main component, the adduct particles of the epoxy-based compound and the imidazole-based compound are coated with an ethyl cellulose film, and the surface thereof is crosslinked with a polyfunctional isocyanate compound. The epoxy-based compound, the imidazole-based compound, and ethyl cellulose are dissolved in a predetermined saturated hydrocarbon-based solvent under stirring and heating. Then, the epoxy-based compound and the imidazole-based compound are subjected to adduct reaction to obtain a slurry of the adduct.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 9, 2008
    Applicant: SONY CHEMICAL & INFORMATION DEVICE CORPORATION
    Inventors: Daisuke Masuko, Katsuhiko Komuro, Masahiko Ito, Tadasu Kawashima
  • Publication number: 20080161589
    Abstract: An aluminum chelate-based latent curing agent capable of curing a thermosetting epoxy resin under the condition of relatively low temperature in a short period of time is provided. Furthermore, a method for manufacturing the latent curing agent is provided, in which the curing conditions of the aluminum chelate-based latent curing agent can be controlled relatively easily. The aluminum chelate-based latent curing agent is prepared by reacting an aluminum chelate agent with a silsesquioxane type oxetane derivative in the presence of a water insoluble or poorly water-soluble cellulose ether, whereby latency properties are imparted thereto. This latent curing agent contains a coating layer composed of the water insoluble or poorly water-soluble cellulose ether. Preferably, the surface is treated with an isocyanate compound.
    Type: Application
    Filed: June 2, 2006
    Publication date: July 3, 2008
    Applicant: SONY CHEMICAL & INFORMATION DEVICE CORPORATION
    Inventors: Katsuhiko Komuro, Tadasu Kawashima, Masahiko Ito, Daisuke Masuko
  • Patent number: 6811847
    Abstract: A printing medium is manufactured by forming a primer layer 12 and an adhesive layer 13 successively on the rubbed surface of a base film 11 and wound into a roll 15. When the printing medium is delivered from roll 15, adhesive layer 13 does not remain on the roll 15 side even if adhesive layer 13 has a low adhesive power because the adhesion between adhesive layer 13 and primer layer 12 is strong while the adhesion between adhesive layer 13 and base film 11 in roll 15 is weak. The printing medium can be run in a printer without using a release film because adhesive layer 13 has a low adhesive power.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: November 2, 2004
    Assignee: Sony Chemicals Corporation
    Inventor: Tadasu Kawashima
  • Patent number: 6534172
    Abstract: A technique for improving the adhesive force between a biodegradable base film and a rubbery adhesive layer. An adhesive tape is obtained by rubbing the surface of a biodegradable film 9 by a means of rubbing 7 and then applying solution of ingredients of adhesive layer thereonto, thus forming an adhesive layer. The adhesion force between the base film and the adhesive layer is improved by the rubbing treatment. When the solution of ingredients of adhesive layer is an aqueous system, it is also possible that solution of ingredients of primer layer containing an organic compound as a solvent is applied onto the rubbed surface to thereby form a primer layer followed by the formation of the adhesive layer. The adhesive layer may contain fillers, coloring agents, age resistors, etc. so long as the biodegradability is not deteriorated thereby. It is preferable that a separate film to be bonded to the surface of the adhesive layer is also a biodegradable one.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: March 18, 2003
    Assignee: Sony Chemicals Corp.
    Inventor: Tadasu Kawashima
  • Patent number: 6379808
    Abstract: It is an object of the present invention to provide a highly durable photochromic film retaining a photochromic activity for a long time even when used under high temperture and high humidity conditions. A durable photochromic film comprising a coloring material layer containing a photochromic material and a phototransmissive deposition film laminated to said coloring material layer is disclosed.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: April 30, 2002
    Assignee: Sony Chemicals Corporation
    Inventor: Tadasu Kawashima
  • Publication number: 20020039633
    Abstract: The present invention aims to provide a printing medium free from release films.
    Type: Application
    Filed: April 4, 2001
    Publication date: April 4, 2002
    Inventor: Tadasu Kawashima
  • Patent number: 6274213
    Abstract: A double-faced adhesive tape without release liner is provided. A weakly adhesive layer 12 having a relatively weak adhesive force is formed on one face of a resin film 11 and a strongly adhesive layer 13 having a stronger adhesive force than that of the weakly adhesive layer 12 is formed on the other face and the assembly is formed into a roll of a double-faced adhesive tape 5. The weakly adhesive layer 12 is formed after the surface of the resin film 11 has been subjected to a rubbing treatment to increase the adhesive force between them, so that the weakly adhesive layer 12 and the strongly adhesive layer 13 are separated without using a release liner when the tape is rolled up.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: August 14, 2001
    Assignee: Sony Chemicals Corp.
    Inventor: Tadasu Kawashima
  • Publication number: 20010009721
    Abstract: It is an object of the present invention to provide a highly durable photochromic film retaining a photochromic activity for a long time even when used under high temperture and high humidity conditions. A durable photochromic film comprising a coloring material layer containing a photochromic material and a phototransmissive deposition film laminated to said coloring material layer is disclosed.
    Type: Application
    Filed: April 2, 1998
    Publication date: July 26, 2001
    Inventor: TADASU KAWASHIMA
  • Patent number: 4237886
    Abstract: An electrode, or grounding pad for contact with a living body comprises a conductive substrate of a textile having conductive fibers, a conductive adhesive layer containing carbon fibers for contacting the surface of the living body and being affixed to the conductive substrate, and an electrical connection to the conductive substrate.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: December 9, 1980
    Assignees: Sony Corporation, Natsuo Uchiyama
    Inventors: Isoji Sakurada, Tadasu Kawashima