Patents Assigned to Research Association of Synethtic Dyestuffs
  • Dye compositions for polyester fibers
    Patent number: 4494957
    Abstract: Dye compositions for dyeing polyester fibers comprise at least one disazo dye represented by the formula (I): ##STR1## wherein X represents a hydrogen atom, a chlorine atom, a nitro group or a trifluoromethyl group; Y represents a cyano group, an alkoxycarbonyl group or a carbamoyl group; Z represents a hydrogen atom, a chlorine atom, a methyl group, a hydroxyl group, or an alkyl group substituted with a formylamino group or an acylamino group; R.sup.1 and R.sup.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: January 22, 1985
    Assignee: Research Association of Synethtic Dyestuffs
    Inventors: Toshio Niwa, Kiyoshi Himeno, Shuichi Maeda