Patent ID: 7407561
Filing Date: 2008-08-05
Classification: D21H

Abstract:
1. A method of controlling pitch and stickies deposition in papermaking, which method comprises the step of adding to paper furnish prior to sheet formation a multi-crosslinked cationic polymer, which polymer is prepared by the method comprising: (i) polymerizing substantially all of the monomer components by free radical initiation to form a base cationic polymer solution, wherein at least one of the monomer components is a cationic monomer component; and (ii) contacting the base cationic polymer solution with additional free radical initiator to form interconnecting bonds between the base cationic polymers to form the multi-crosslinked cationic polymer and the interconnecting bonds occur at points on the backbone of the cationic polymer, wherein the multi-crosslinked cationic polymer has a higher molecular weight than the base cationic polymer, which base cationic polymer is a homopolymer formed from diallydialkylammonium monomer.