Cellulose Or Derivative As Chemical Reactant Patents (Class 525/54.21)
Previously formed solid polymer is derived from n=c=x reactant or contains n=c=x group wherein x is chalcogen (Class 525/54.22)
Previously formed solid polymer is derived from ethylenically unsaturated reactants only (Class 525/54.23)
  • Absorbent composite containing polymaleic acid crosslinked cellulosic fibers
    Patent number: 6184271
    Abstract: Cellulosic fibers intrafiber crosslinked with a polymeric polycarboxylic acid crosslinking agent are disclosed. In one embodiment, the polymeric polycarboxylic acid is polyacrylic acid and, in another embodiment, the polycarboxylic acid is polymaleic acid. Methods for forming cellulosic fibers having stable intrafiber crosslinks and for forming crosslinked cellulosic fibers having low knot level are also disclosed.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: February 6, 2001
    Assignee: Weyerhaeuser Company
    Inventors: John A. Westland, Richard A. Jewell, Amar N. Neogi