Patents by Inventor Takashi Kanezaki

Takashi Kanezaki 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).

  • Patent number: 5502134
    Abstract: A polycarbonate-polydimethylsiloxane copolymer, the copolymer comprising a polycarbonate block of the formula ##STR1## wherein R.sup.1 and R.sup.2 are hydrogen or a C.sub.1 -C.sub.4 alkyl, R.sup.3 and R.sup.4 are hydrogen, halogen, a C.sub.1 -C.sub.20 alkyl or an aryl, x is 1 to 5, y is to 4 and n is 1 to 100, and a polydimethylsiloxane block of the formula ##STR2## wherein R.sup.5 and R.sup.6 are an organic residue having an aromatic nucleus and m is greater than or equal to 100, the copolymer having a content of the polydimethylsiloxane block of 0.5 to 10% by weight, an n-hexane soluble matter content in an amount of 1.0% by weight or less and a viscosity average molecular weight of 10,000-50,000. The copolymer has a high impact resistance and when blended with a glass fiber or a carbon fiber forms a molded product having an extremely high Izod impact strength.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: March 26, 1996
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Masaya Okamoto, Takashi Kanezaki
  • Patent number: 5206302
    Abstract: The rubber-modified styrene-based resin composition, which is a composite of a styrene-based resin as a continuum of the matrix phase and a diene-based rubbery polymer as a dispersed particulate phase in the matrix, is characterized by the parameters including an average particle diameter of the particles of the rubbery polymer in the range from 0.08 to 1.00 .mu.m, peripheral parameter thereof in the range from 0.1 to 2.5 (.mu.m).sup.-1. (% by weight).sup.-1 and relaxation time T.sub.2 thereof in the range from 300 to 2000 .mu. seconds as the determinant factors of the moldability of the resin composition as well as the impact strength and surface gloss of the shaped articles prepared from the composition.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: April 27, 1993
    Assignee: Idemitsu Petrochemical Company Limited
    Inventors: Tuneaki Kohsaka, Kazuo Sato, Yutaka Tsubokura, Takashi Kanezaki