Patents by Inventor Masami Maki

Masami Maki 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).

  • Polypropylene resin compositions
    Patent number: 5023286
    Abstract: The present invention relates to polypropylene resin compositions that exhibit an improved smell over prior art polypropylene resin compositions and comprises a polypropylene resin containing an inorganic filler, at least one phenolic antioxidant, at least one phosphorus antioxidant, and fine powders comprising aggregates of intimately bonded particles comprising zinc oxide, titanium dioxide and water.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: June 11, 1991
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masaru Abe, Yoichi Kawai, Masami Maki, Katuo Wada
  • Polypropylene-base resin composition containing an inorganic filler and 0.01 to 0.6 wt. % of carbon black
    Patent number: 4734450
    Abstract: A polypropylene-base resin composition comprising a polypropylene-base resin and carbon black in an amount of 0.01-0.6 wt. % based on the polypropylene-base resin and being suitable for use in the production of molded articles having excellent paintability.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: March 29, 1988
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yoichi Kawai, Masami Maki, Masaru Abe, Sachio Yokote, Katsumi Sekiguchi
  • Glass-fiber reinforced polypropylene resin composition
    Patent number: 4663369
    Abstract: A glass-fiber reinforced polypropylene composition having superior adhesion of glass fibers therein, stiffness, high-impact properties and molding properties is provided, which composition comprises a graft polypropylene resin obtained by graft-polymerizing a radically polymerizable unsaturated compound onto a crystalline polypropylene resin with an organic peroxide catalyst in a hydrocarbon solvent or a blend of the graft polypropylene with a crystalline polypropylene resin, glass fibers treated with an organic silane or titanium compound, Ca stearate and an alkaline earth metal compound, the respective quantities of the above components being specified.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: May 5, 1987
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Masaru Abe, Masami Maki, Koutarou Suzuki, Minoru Hoshino
  • Electrically-conductive resin composition
    Patent number: 4510079
    Abstract: An electrically-conductive polyolefin resin composition having excellent resin flow properties which comprises (a) a polyolefin resin, (b) sulfur, (c) a plate adhesion promoter, (d) an electrically-conductive carbon black, and (e) a flow improver.
    Type: Grant
    Filed: April 7, 1982
    Date of Patent: April 9, 1985
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Yoshihisa Gotoh, Sachio Yokote, Masami Maki, Katsumi Sekiguchi
  • Electroconductive resin composition
    Patent number: 4481131
    Abstract: An electroconductive polyolefin composition comprising (1) 100 parts by weight of a polyolefin resin, (2) 10 to 60 parts by weight of carbon black, (3) 0.1 to 6 parts by weight of sulfur and (4) at least 0.1 part by weight of one or two specified accelerators, and optionally containing 5 to 60 parts by weight of atactic polypropylene.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: November 6, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Yoshihisa Gotoh, Masami Maki, Sachio Yokote, Katsumi Sekiguchi, Katsuyoshi Sasagawa, Masao Imai
  • Polypropylene-base resin composition
    Patent number: 4480065
    Abstract: A polypropylene-base resin composition which comprises:(a) 80-60 wt. % of a crystalline ethylenepropylene block copolymer having an ethylene content of 11-30 wt. % and specific physical data;(b) 5-35 wt. % of an ethylene-propylene copolymer rubber having a propylene content of 20-50 wt. % and a specific Mooney viscosity;(c) 5-35 wt. % of an ethylene-propylene-a specific diene terpolymer having a propylene content of 20-50 wt. % and a specific Mooney viscosity; and(d) 2-5 wt. %, based on the total weight of the above resin components (a), (b) and (c), of an inorganic filler having a particle size of 3 .mu.m or smaller.The composition has excellent paintability and high stiffness, impact resistance and molding fluidity.
    Type: Grant
    Filed: May 17, 1983
    Date of Patent: October 30, 1984
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Yoichi Kawai, Yoshihisa Gotoh, Masami Maki, Akio Yoshihara, Minoru Hoshino, Katsumi Sekiguchi
  • Electroconductive resin composition
    Patent number: 4425262
    Abstract: An electroconductive polyolefin composition comprising (a) 100 parts by weight of a polyolefin resin, (b) 10 to 60 parts by weight of carbon black, (c) 0.1 to 6 parts by weight of sulfur and (d) 0.1 to 5 parts by weight of trithiolcyanuric acid, and optionally containing 5 to 60 parts by weight of atactic polypropylene.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: January 10, 1984
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Yoshiro Nakamura, Yoshihisa Gotoh, Masami Maki, Sachio Yokote, Katsumi Sekiguchi
  • Polypropylene composition containing a 1.3,2.4-di(alkylbenzylidene) sorbitol
    Patent number: 4314039
    Abstract: A composition having improved transparency and being substantially free from a bleeding phenomenon comprising 100 parts by weight of polypropylene and 0.005 to 8 parts by weight of a 1.3,2.4-di(alkylbenzylidene) sorbitol with each alkyl group having 2 to 18 carbon atoms.
    Type: Grant
    Filed: August 6, 1980
    Date of Patent: February 2, 1982
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoichi Kawai, Katsuyoshi Sasagawa, Masami Maki, Hozumi Ueda, Masayoshi Miyamoto