Sulfonated Patents (Class 8/911)
  • Wholly aromatic polyamide fiber with improved dyeability
    Patent number: 5723570
    Abstract: A wholly aromatic polyamide fiber containing above about 600 ppm (about 0.2 mole percent) of sulfonate in the polymer main chain is provided. The sulfonate is represented by the general formulas (III) or (IV): ##STR1## where M is hydrogen, a metal cation, or a quaternary ammonium ion. The fiber exhibits excellent dyeability and can be cation-dyed without the use of a dye carrier.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: March 3, 1998
    Assignee: Industrial Technology Research Institute
    Inventors: Jen-Chang Yang, Jin-Chyueh Lin, Lien-Tai Chen
  • Dye suspensions
    Patent number: 5476519
    Abstract: Water insoluble or sparingly soluble dyestuffs such as disperse dyes as concentrates for making up dyebaths or for use as printing pastes, and optical brightening agents for laundry detergents are formulated as stable suspensions in aqueous structured surfactants.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: December 19, 1995
    Assignee: Albright & Wilson, Limited
    Inventors: William P. Haslop, Jill E. Newton, Richard M. Clapperton