Patents by Inventor Kenichi Katase

Kenichi Katase 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).

  • Thermoformed polyarylene sulfide container
    Patent number: 5187257
    Abstract: Disclosed herein is a crystallized, thin-wall container which is excellent in heat-resistance, oil-resistance, chemical stability under high temperature and high humidity and gas impermeability, is particularly suitable for heating foodstuffs packaged in it in electronic range, electric oven, etc. and is obtained by thermoforming a substantially amorphous sheet which has a crystallinity index of below 15% and an elongation of not less than 100% at room temperature and is obtained from a poly(arylene sulfide) which has a substantially linear structure, has not less thant 70 wt % of a repeating unit of ##STR1## and a logarithmic viscosity number of 0.2 to 1.0 in a solution of 1-chloronaphthalene (concentration of 0.4 g/dl at a temperature of 208.degree. C.) and a process for producing the container.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: February 16, 1993
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takayuki Katto, Yukio Ichikawa, Toshio Enoki, Kenichi Katase
  • Polymer alloy of polyarylene thioether and a process for producing the same
    Patent number: 5134206
    Abstract: Disclosed herein are a polymer alloy prepared by polymerizing 0.1 to 100 parts by weight of at least one radically polymerizable monomer to 100 parts by weight of polyarylene thioether having a repeating unit of ##STR1## as a main constituent and at least a part of said radically polymerizable monomers is polymerized within inner pores of the polyarylene thioether particles and a process for producing the polymer alloy.The polymer alloy of polyarylene thioether according to the present invention has the fine particles of the radically polymerized monomer uniformly dispersed in the said polymer alloy, and accordingly, the polymer alloy of polyarylene thioether according to the present invention is excellent in various physical properties, such as, good impact strength and improved anti-flash property.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: July 28, 1992
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yo Iizuka, Ken Kashiwadate, Shunzo Endo, Toshio Hosokawa, Takayuki Katto, Toshiya Mizuno, Kenichi Katase
  • Polymer alloy of polyarylene thioether and a process for producing the same
    Patent number: 5021523
    Abstract: Disclosed herein are a polymer alloy prepared by polymerizing 0.1 to 100 parts by weight of at least one radically polymerizable monomer to 100 parts by weight of polyarylene thioether having a repeating unit of ##STR1## as a main constituent and at least a part of said radically polymerizable monomers is polymerized within inner pores of the polyarylene thioether particles and a process for producing the polymer alloy.The polymer alloy of polyarylene thioether according to the present invention has the fine particles of the radically polymerized monomer uniformly dispersed in the said polymer alloy, and accordingly, the polymer alloy of polyarylene thioether according to the present invention is excellent in various physical properties, such as, good impact strength and improved anti-flash property.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: June 4, 1991
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yo Iizuka, Ken Kashiwadate, Shunzo Endo, Toshio Hosokawa, Takayuki Katto, Toshiya Mizuno, Kenichi Katase
  • High-lubricity film
    Patent number: 4985512
    Abstract: A film having high lubricity and excellent dielectric strength characteristics and containing few fish eyes is obtained by biaxially-stretching a resin composition which has been obtained by radical polymerization of 0.5-80 parts by weight of a monomer component composed principally of a styrene monomer in the presence of 100 parts by weight of particles of a substantially straight-chain poly(arylene sulfide) having a melt viscosity of at least 1,000 poises.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: January 15, 1991
    Assignee: Kureha Kagaku Kogyo K. K.
    Inventors: Yo Iizuka, Ken Kashiwadate, Toshio Hosokawa, Shunzo Endo, Takayuki Katto, Toshiya Mizuno, Kenichi Katase