Patents Assigned to Shikoku Chemicals Corp.
  • Rubber compositions with granules of sulfur, oil and methylstyrene
    Patent number: 4775724
    Abstract: A rubber composition contains granules of two-layer structure composed of insoluble sulfur powder treated with .alpha.-methylstyrene and a process oil as a vulcanizing agent. In this case, the content of process oil in the inner layer portion of the granule is larger than that in the outer layer portion thereof.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: October 4, 1988
    Assignees: Bridgestone Corporation, Shikoku Chemicals Corp.
    Inventors: Masaaki Morimoto, Seiichiro Iwafune
  • Epoxy resin composition
    Patent number: 4593069
    Abstract: An epoxy resin composition comprising an epoxy resin, either 2-vinyl-4,6-diamino-s-triazine or 2-vinyl-4,6-diamino-s-triazine/isocyanuric acid adduct, and at least one compound selected from dicyandiamide, polyvinyl-p-phenol and specific imidazole compounds. The composition is useful, for example, in inks, insulating paints and adhesives for printed circuit base boards and in copper-clad laminated boards.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: June 3, 1986
    Assignees: Shikoku Chemicals Corp., Shikoku Finechemicals Corp.
    Inventors: Kazuo Kamagata, Toshiaki Yamada, Shunichi Kawata, Takashi Mizui
  • Isocyanuric acid adduct of 2-vinyl-4,6-diamino-S-triazine
    Patent number: 4567259
    Abstract: Disclosed is an isocyanuric acid adduct of 2-vinyl-4,6-diamino-S-triazine represented by the following structural formula: ##STR1## This adduct is prepared by heating 2-vinyl-4,6-diamino-S-triazine and isocyanuric acid in the presence of water, preferably by using sodium sulfide as a polymerization inhibitor. This adduct is valuable as a hardening agent for an epoxy resin.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: January 28, 1986
    Assignee: Shikoku Chemicals Corp.
    Inventors: Natsuo Sawa, Takeshi Masuda, Takashi Mizui