Patents by Inventor Kiichiro Seki

Kiichiro Seki 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: 5670612
    Abstract: An aqueous self-emulsifiable epoxy resin curing agent which is produced by reacting, with each other, an (A) polyamine (meta-xylylenediamine, etc), a (B) epoxy group-containing alkoxypolyethylene polyether compound (methoxypolyethyleneglycol glycidyl ether, etc.) having 500 to 5000 average molecular weight, at least one (C) hydrophobic epoxy compound having at least one epoxy group in the molecule (butyl glycidyl ether, epoxy resin of type bisphenol A or F, etc.) and optionally, a (D) unsaturated compound capable of addition reaction (acrylonitrile, methyl methacrylate, etc.), in a molar quantity of the epoxy group in (B) of 0.001 to 0.1 mol and in a molar quantity of the sum of the epoxy group in (C) and the unsaturated group in (D) of 0.2 to 0.5 mol, each based on 1 mol of a hydrogen atom bonded to a nitrogen atom in (A) which is capable of reacting with an epoxy group or a unsaturated group.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: September 23, 1997
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Shuta Kihara, Shinichi Yonehama, Kiichiro Seki
  • Patent number: 5387368
    Abstract: An oxygen scavenging composition comprising an intimate mixture of (A) a compound having a skeleton of the following formula (1), ##STR1## wherein R is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, m is an integer of 3 to 5, and n is an integer of 1 to 3, provided that m+n equals 6,(B) a transition metal compound and (C) a phosphorus compound. This composition is useful in a variety of fields requiring prevention of rust formation on metal, prevention of oxidation and decay of an organic substance, preservation of foods, prevention of insects and prevention of mold.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: February 7, 1995
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Toshiaki Nishimura, Kazumi Tanaka, Masahiro Harada, Kiichiro Seki, Shuta Kihara
  • Patent number: 5356961
    Abstract: There is disclosed an aqueous epoxy resin composition which comprises an epoxy resin; an amidoamine obtained by the reaction of a carboxylic acid with a polyamine compound represented by the general formula (I) ##STR1## wherein n is an integer of 0 or 1 or greater indicating the number of the repeating units which compound is obtained by the reaction of epichlorohydrin with xylylenediamine, especially m-xylenediamine; and water. The above-mentioned epoxy resin composition can be utilized in a wide variety of industrial applications such as a coating material used for the purpose of anticorrosion or decoration, an adhesive for civil and building work or the like.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: October 18, 1994
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Toshiaki Nishimura, Kiichiro Seki, Yasushi Ohnuma