Patents by Inventor Kunimasa Kamio

Kunimasa Kamio 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).

  • Thermosetting resin composition of an allylated novolak and a bis-maleimide
    Patent number: 4632966
    Abstract: A thermosetting resin composition comprising an N,N'-bismaleimide compound and an allylated phenol novolak resin having partially or wholly allyl-etherified phenolic hydroxyl groups and substantially no nucleous-substituted allyl group.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: December 30, 1986
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shuichi Kanagawa, Hisao Takagishi, Teruho Adachi, Kunimasa Kamio
  • Phosphinylmethyl polypenols and polyglycidyl ethers thereof
    Patent number: 4621123
    Abstract: Novel phosphorus-containing polyglycidyl ethers capable of forming a cured epoxy resin having a high flame retardancy and excellent in heat resistance characteristics such as heat deterioration resistance, glass transition temperature, thermal deformation temperature and the like; a process for producing said phosphorus-containing polyglycidyl ethers; phosphorus-containing polyphenol compounds used in production of said phosphorus-containing polyglycidyl ethers; and a process for producing said phosphorus-containing polyphenol compounds.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: November 4, 1986
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Takagishi, Kazunori Kawakami, Kunimasa Kamio, Khoichi Okuno
  • Epoxy resin composition
    Patent number: 4529790
    Abstract: An epoxy resin composition comprising a polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and then reacting the novolak with an epihalohydrin, which composition is useful in electronic fields, for example, for encapsulating semiconductor products or for the production of printed circuit boards.
    Type: Grant
    Filed: July 31, 1984
    Date of Patent: July 16, 1985
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kunimasa Kamio, Hisao Takagishi, Shuichi Kanagawa
  • Conductive paste
    Patent number: 4410457
    Abstract: An electroconductive paste comprising(a) an electroconductive filler,(b) a reactive solvent, and(c) a hardener comprising(c-1) an epoxy resin,(c-2) a latent hardener, and(c-3) an epoxy compound-dialkylamine adduct,the percent by weight of (a), (b) and (c) being 95 to 50, 1 to 20 and 4 to 30, respectively, and the weight ratio of (c-1):(c-2):(c-3) being 100:0 to 30:0.1 to 40. The paste is useful for bonding electronic elements to metal lead frames and/or substrates.
    Type: Grant
    Filed: May 5, 1982
    Date of Patent: October 18, 1983
    Assignees: Sumitomo Chemical Co., Ltd., Sumitomo Metal Mining Company, Ltd.
    Inventors: Kenji Fujimura, Shigeru Sekiya, Kunimasa Kamio, Koichi Okuno, Satoru Haraguchi, Koiti Ohasi, Hiroyuki Yamaguchi
  • Oligomerization of m-isopropenylphenol
    Patent number: 4408086
    Abstract: m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polyermizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: October 4, 1983
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shunsuke Matsushima, Kazuhiko Hata, Kentaro Mashita, Shuichi Kanagawa, Shinji Nakao, Kiyoshi Nakai, Kunimasa Kamio
  • Curable composition
    Patent number: 4360649
    Abstract: A curable resin composition comprising an epoxy resin, a hardener and an epoxy compound-dialkylamine adduct as a latent hardener. The composition is excellent in storage stability at ambient temperatures and rapidly curable under heating conditions, and is usable as adhesives, paints, molding materials, casting materials and so on.
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: November 23, 1982
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kunimasa Kamio, Koichi Okuno, Satoru Haraguchi, Hiroyuki Yamaguchi, Koichi Ohashi
  • Oligomer of m-isopropenylphenol
    Patent number: 4337367
    Abstract: An oligomer of m-isopropenylphenol is produced by subjecting m-isopropenylphenol to thermal polymerization in the absence of a catalyst.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: June 29, 1982
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shuichi Kanagawa, Shinji Nakao, Kiyoshi Nakai, Kunimasa Kamio, Shunsuke Matsushima, Kazuhiko Hata, Kentaro Mashita
  • Oligomerization of m-isopropenylphenol
    Patent number: 4260831
    Abstract: m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polymerizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.
    Type: Grant
    Filed: March 27, 1979
    Date of Patent: April 7, 1981
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shunsuke Matsushima, Kazuhiko Hata, Kentaro Mashita, Shuichi Kanagawa, Shinji Nakao, Kiyoshi Nakai, Kunimasa Kamio
  • Epoxy resins and process for producing the same
    Patent number: 4211715
    Abstract: An epoxy resin of the formulae (I) and/or (II), ##STR1## wherein R and R' are each hydrogen atom or an alkyl group having 1 to 3 carbon atoms and n is a mean value satisfying the equation, 0<n.ltoreq.2, which is excellent in heat resistance, flexibility, curability and the like, and is useful in paints, adhesives, civil engineering and construction industry, electric appliances and the like.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: July 8, 1980
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shuichi Kanagawa, Shinji Nakao, Kiyoshi Nakai, Kunimasa Kamio, Shunsuke Matsushima, Kazuhiko Hata, Kentaro Mashita
  • Stabilized chlorine-containing resin composition
    Patent number: 4108924
    Abstract: A chlorine-containing resin is prevented from degradation due to heat and light by addition of a novolac type epoxy compound of the formula, ##STR1## wherein R is hydrogen or C.sub.1 - C.sub.4 alkyl, and n is a number of 5 to 15.
    Type: Grant
    Filed: February 25, 1976
    Date of Patent: August 22, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Katsuo Akagane, Teruho Adachi, Kunimasa Kamio