Patents Assigned to I-Hwa Industrial Co., Ltd.
  • Liquid dispersed dye of the azo or anthraquinone type
    Patent number: 6066183
    Abstract: A liquid dispersed dye of the azo or anthraquinone type that includes a dispersing agent and dispersing assistant in order to keep the dye dissolved in liquid without sedimentation. The preferred dispersing agent is a sulfonated lignin salt and the preferred dispersing assistant is a surfactant such as polyethylene glycol epoxide ether (EO-1), polyethylene glycol phenolic-formaldehyde epoxide ether (EO-2), or polyethylene glycol amino methylene epoxide ether (EO-3).
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: May 23, 2000
    Assignee: I-Hwa Industrial Co., Ltd.
    Inventor: Kun-Chen Wang