With Natural Resin Or Derivative Patents (Class 106/140.2)
  • Fibrous blend and method of making
    Patent number: 7749317
    Abstract: A mixed polymer fiber, comprising a crosslinked polymer fiber comprising carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer, and cellulose fiber.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: July 6, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Su Bing
  • Methods for the preparation of mixed polymer superabsorbent fibers containing cellulose
    Patent number: 7717995
    Abstract: A method for making mixed polymer composite fibers containing cellulose fibers in which cellulose fibers are dispersed in an aqueous solution comprising a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer in water to provide an aqueous fiber dispersion; the aqueous dispersion treated with a first crosslinking agent to provide a gel; the gel mixed with a water-miscible solvent to provide composite fibers; and the composite fibers treated with a second crosslinking agent to provide crosslinked fibers.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: May 18, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Bing Su
  • Fibrous blend and methods of preparation
    Patent number: 7591891
    Abstract: A method for making crosslinked fibers containing cellulose fibers in which an aqueous solution comprising a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer in water is treated with a first crosslinking agent to provide a gel; the gel mixed with a water-miscible solvent to provide mixed polymer fibers; cellulose fibers are added to the mixed polymer fibers; and these fibers are treated with a second crosslinking agent to provide crosslinked fibers.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: September 22, 2009
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Su Bing