Patents by Inventor Masayuki Hatanaka

Masayuki Hatanaka 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).

  • Heat-curable polysiloxane composition
    Patent number: 4329275
    Abstract: A heat-curable polysiloxane composition comprised of polydiorganosiloxane having at least 2 vinyl groups and polyorganohydrogensiloxane having at least 2 hydrogen atoms, and containing, as a catalyst, a platinum compound and a phosphorus compound or complex thereof, together with an organic peroxide compound which has no hydroperoxy group in the molecule.
    Type: Grant
    Filed: July 23, 1980
    Date of Patent: May 11, 1982
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Masayuki Hatanaka, Atsushi Kurita
  • Curable composition
    Patent number: 4303572
    Abstract: A curable silicone composition comprising 100 parts by weight of polyorganosiloxane containing at least 2 vinyl radicals bonded to silicon atom(s) in the molecule 0.1-10 parts by weight of polyorganohydrogensiloxane containing more than 2 hydrogen atoms bonded to silicon atom(s), on the average, in the molecule, 5-500 parts by weight of fine powder of a transition metal, and a catalytic amount of a platinum catalyst containing no halogen atoms in the molecule.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: December 1, 1981
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Masayuki Hatanaka, Atsushi Kurita
  • Silicone composition produced by extrusion and hot air vulcanization
    Patent number: 4260536
    Abstract: A heat vulcanizable silicone rubber composition which is capable of being extruded by an extruder and vulcanized by hot air comprising a gum, silica filler and organohydrogenpolysiloxane and as the curing catalyst a combination of an aromatic acylorganicperoxide and an alkylorganicperoxide. The advantage of the above composition is that it can be vulcanized by hot air and the cured product is not sticky.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: April 7, 1981
    Assignee: General Electric Company
    Inventors: Masaharu Yonezawa, Masayuki Hatanaka
  • Platinum complexes for silicone compositions
    Patent number: 4256616
    Abstract: Platinum catalyzed SiH-Olefin silicone compositions are disclosed, wherein the catalyst is a zero-valent platinum-phosphorus complex, which may be combined with stannous salts.
    Type: Grant
    Filed: November 22, 1978
    Date of Patent: March 17, 1981
    Inventors: Masayuki Hatanaka, Shigeru Nagashima
  • Silicone fillers for polysiloxane compositions
    Patent number: 4244856
    Abstract: A SiH-olefin platinum catalyzed composition with excellent resiliency, compression set and which can be hot air vulcanized having therein a vinyl-containing polysiloxane polymer, a hydrogen-containing polyorganio siloxane, a zero valent platinum phosphorus complex and as the novel ingredient a fine calcined silica powder with a refractive index greater than 1.446 and an ignition loss not exceeding 3% which is obtained by firing a precipitated silica.
    Type: Grant
    Filed: January 10, 1979
    Date of Patent: January 13, 1981
    Inventors: Masayuki Hatanaka, Iwao Fukushima
  • Silicone rubber compositions
    Patent number: 4157426
    Abstract: Silicone rubber compositions comprising (A) a diorganopolysiloxane in which the organo substituents are 0.01 to 2 mole % vinyl groups, 0 to 10 mole % phenyl groups and the remainder is alkyl groups, (B) an organohydrogenpolysiloxane, (C) a (O) valent platinum-(III) phosphor complex and, optionally, (D) a filler. These compositions can be cured with steam. Foamable compositions comprising (A), (B), (C) and hydrophobicized wet-process silica.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: June 5, 1979
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Masayuki Hatanaka, Makoto Matsumoto, Masaharu Yonezawa
  • Silicone rubber compositions
    Patent number: 4108833
    Abstract: Silicone rubber compositions comprising (A) a diorganopolysiloxane in which the organo substituents are 0.01 to 2 mole % vinyl groups, 0 to 10 mole % phenyl groups and the remainder is alkyl groups, (B) an organohydrogenpolysiloxane, (C) a (O) valent platinum-(III) phosphor complex and, optionally, (D) a filler. These compositions can be cured with steam. Foamable composition comprising (A), (B), (C) and hydrophobicized wet-process silica.
    Type: Grant
    Filed: November 18, 1976
    Date of Patent: August 22, 1978
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Masayuki Hatanaka, Makoto Matsumoto, Masaharu Yonezawa