Patents by Inventor Masahiro Domoto

Masahiro Domoto 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).

  • Pressure-sensitive adhesive and vinyl acetate-ethylene copolymer emulsion useful as base material therefor
    Patent number: 4128518
    Abstract: A pressure-sensitive adhesive containing a base material therefore comprising an aqueous emulsion of vinyl acetate-ethylene copolymer having an ethylene content of 15 to 40% by weight, preferably 20 to 35% by weight, the benzene-insoluble part of less than 30% by weight, preferably less than 20% by weight, and an intrinsic viscosity of the benzene-soluble part of 0.4 to 1.4 dl/g, preferably 0.6 to 1.0 dl/g, (at 30.degree. C) which is prepared by the emulsion copolymerization of vinyl acetate and ethylene and optionally at least one unsaturated monovinyl monomer in the presence of a protective colloid and a polyoxyethylenic nonionic sulfactant, or a base material comprising a blend of said aqueous emulsion of vinyl acetate-ethylene copolymer as set forth above and an emulsion of an acrylic ester copolymer; and the aqueous emulsion of vinyl acetate-ethylene copolymer useful as the base material for the pressure-sensitive adhesive.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: December 5, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takeo Oyamada, Choji Tomizawa, Masahiro Domoto, Shizuo Narisawa
  • Process for producing aqueous dispersion of ethylene-vinyl acetate copolymer containing no formalin
    Patent number: 4094849
    Abstract: A process for producing an aqueous dispersion of ethylene-vinyl acetate copolymer containing no formalin by emulsion-polymerizng ethylene and vinyl acetate and optionally other copolymerizable vinyl monomers in the presence of a redox catalyst consisting of an oxidizing agent and a reducing agent, which is characterized in that a reaction product of a glyoxal compound and an alkali metal, ammonium or zinc salt of a reductive sulfur oxide is used as the reducing agent for the redox catalyst, in which process the polymerization temperature is easily controlled.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: June 13, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takeo Oyamada, Kazuhisa Satoh, Shinobu Tsuru, Masahiro Domoto, Shizuo Narisawa
  • Novel nonwoven fabric and method for manufacturing same
    Patent number: 4092454
    Abstract: Nonwoven fabric having desirable water absorbency and excellent resistances to oils and solvents is obtained by use of pullulan and/or derivatives thereof as binder.
    Type: Grant
    Filed: May 27, 1976
    Date of Patent: May 30, 1978
    Assignees: Sumitomo Chemical Company, Limited, Hayashibara Biochemical Laboratories, Inc.
    Inventors: Masahiro Domoto, Kozo Tsuji
  • Paper coating material containing pullulan
    Patent number: 3932192
    Abstract: A coating material obtained by incorporating into a paper coating material pullulan, which is a linear high polymer having repetition units, bonded through .alpha.-1,6 linkages, of maltotriose, a trimer of glucose, and is represented by the formula, ##SPC1##Wherein n represents the polymerization degree and is an integer of 20 to 10,000, is excellent in such properties as gloss, printing gloss, adhesive strength, and viscosity stability during storage.
    Type: Grant
    Filed: September 24, 1974
    Date of Patent: January 13, 1976
    Assignees: Sumitomo Chemical Company, Limited, Hayashibara Biochemical Laboratories, Inc.
    Inventors: Seizo Nakashio, Noriyuki Sekine, Nobuhiro Toyota, Fumio Fujita, Masahiro Domoto