Patent Number: 6,168,686

Title: Papermaking aid

Abstract: A novel method of improving drainage rate and retention of fines which is effective in unfilled, newsprint-type furnish without a silica/bentonite-type particle is disclosed. The method comprises adding a cationic or amphoteric starch, and a cationic polyelectrolyte followed by the addition of a high molecular weight anionic polyacrylamide copolymer.

Inventors: Sutman; Frank J. (Jacksonville, FL), Hobirk; Richard A. (Fernandina Beach, FL)

Assignee: Betzdearborn, Inc.

International Classification: D21H 23/00 (20060101); D21H 23/76 (20060101); D21H 17/55 (20060101); D21H 11/00 (20060101); D21H 17/66 (20060101); D21H 17/56 (20060101); D21H 17/07 (20060101); D21H 17/00 (20060101); D21H 17/44 (20060101); D21H 11/08 (20060101); D21H 17/37 (20060101); D21H 21/10 (20060101); D21H 17/29 (20060101); D21H 17/42 (20060101); D21H 011/08 (); D21H 021/10 ()

Expiration Date: 01/02/2018