Patents by Inventor Shigeaki Nagano

Shigeaki Nagano 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).

  • Polyarylene sulfide resin composition
    Patent number: 5302651
    Abstract: A polyarylenesulfide resin composition manufactured by compounding polyarylenesulfide resin with one or more ester-based compounds selected from the groups of compounds shown in the following formulas (1) and (2): ##STR1## where R.sup.1 to R.sup.4 are such that at least one of them is an alkyl or alkenyl group of 10-40 carbon atoms, the remaining Rs represent --H, --OH, alkyl, or aryl radicals, and 1.0<m<6.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: April 12, 1994
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Kiyotaka Kawashima, Shigeaki Nagano
  • Polyphenylene sulfide resin composition
    Patent number: 5177137
    Abstract: A polyphenylene sulfide resin composition comprising(1) a polyphenylene resin, and(2) at least one compound selected from the group consisting of(a) zinc carbonate,(b) manganese carbonate, and(c) zinc hydroxide.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: January 5, 1993
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Kiyotaka Kawashima, Tsuneyuki Adachi, Matsuo Suzuki, Shigeaki Nagano, Morikuni Yamamoto
  • Polyphenylene sulfide resin composition
    Patent number: 5169892
    Abstract: A polyphenylene sulfide resin composition including a polyphenylene sulfide resin and a metal salt solid solution represented by formula (I)[(Mg).sub.y1 (M').sub.y2 ].sub.1-x M".sub.x (OH).sub.2 A.sub.x/n.mH.sub.2 O (I)wherein M' is at least one divalent metal element selected from the group consisting of zinc (Zn), cadmium (Cd), lead (Pb), calcium (Ca), and strontium (Sr);M" is a trivalent metal element;A is an n-valent anion;x is a positive number in the range of 0<x.ltoreq.0.5;y1 and y2 are positive numbers which satisfy a relationship of 0.5.ltoreq.y1+y2<1;m is 0 or a positive number in the range of 0<m<2; andn is an integer in the range of 1 to 3,and provides a resin composition which reduces generation of gases corrosive to metals from the polyphenylene sulfide resin.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: December 8, 1992
    Assignee: Dainippon Ink and Chemicals Inc.
    Inventors: Kiyotaka Kawashima, Shigeaki Nagano