Patents Assigned to EC-Showa Denko K.K.
  • Patent number: 6815477
    Abstract: The purpose of the present invention is to provide a flame-retardant polyamide resin composition which neither causes environment pollution nor liberates toxic combustion gases, exhibits good flame-retardancy even if an inorganic filler is compounded with the polyamide-based resin, and hardly stains the mold during molding. Provision of a flame-retardant polyamide resin composition comprising (A) 20 to 89 wt.-% of a polyamide-base resin consisting of a polyamide resin obtained from xylylene diamine and an &agr;,&ohgr;-straight-chain aliphatic dibasic acid, (B) 1 to 30 wt.-% of a salt of polyphosphoric acid and melamine, and (C) 10 to 50 wt.-% of inorganic filler; and of electrical parts employing the composition.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: November 9, 2004
    Assignee: EC-Showa Denko K.K.
    Inventors: Toshihiro Arai, Tadashi Takeda, Katsuo Kobori, Osamu Hamazoe
  • Patent number: 6204314
    Abstract: The object is to provide a flame retardant polyamide resin composition having excellent tensile elongation at break and excellent properties for use as a hinge. A flame retardant polyamide resin composition is provided, which comprises 100 parts by weight of a polyamide resin mixture consisting of a first aliphatic polyamide and at least one polyamide selected from the group consisting of a second aliphatic polyamide, which differs from the first aliphatic polyamide, and a semi-aromatic polyamide, and from 0.4 to 20 parts by weight of a melamine cyanurate-type flame retarder.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: March 20, 2001
    Assignee: EC-Showa Denko K.K.
    Inventors: Tadashi Takeda, Toshihiro Arai, Osamu Hamazoe, Hiroshi Kirikoshi