Patents Assigned to Procomp, Inc.
  • Retention and drainage aid for papermaking
    Patent number: 4798653
    Abstract: A papermaking stock comprising cellulose fibers in an aqueous medium at a concentration of preferably about 50% by weight of the total solids in the stock including a retention and dewatering aid comprising a two component combination of an anionic polyacrylamide and a cationic colloidal silicia sol. The stock exhibits enhanced resistance to shear forces during the papermaking process. A papermaking process is also described.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: January 17, 1989
    Assignee: Procomp, Inc.
    Inventor: John D. Rushmere