Abstract: A cationic polyacrylamide (cPAM) and methods of making and using the same are disclosed. The cPAM comprises the radical polymerization reaction product of an acrylamide (AM) monomer, a cationic monomer, and, optionally, one or more additional ethylenically unsaturated monomer(s). A glyoxalated polyacrylamide (gPAM) resin is also disclosed, and comprises the reaction product of a glyoxalation agent and the cationic polyacrylamide (cPAM). A homopolymer of the cationic monomer is also disclosed. An additive composition for papermaking is also disclosed, along with methods of preparing and using the same. The additive composition comprises an aqueous media and the glyoxalated polyacrylamide (gPAM) resin, or the homopolymer, dispersed therein.

Abstract: A drainage-optimized additive composition for papermaking is disclosed. The composition comprises an aqueous media, a glyoxalated polyacrylamide (GPAM) resin, and an anionic polyacrylamide (APAM) resin. The GPAM resin has a weight average molecular weight (Mw) of at least about 5 MDa and a cationic monomer content of at least about 4 mol %. The APAM resin has a Mw of at least about 0.25 MDa, and an anionic monomer content up to about 25 mol %. A method of preparing the additive composition is also disclosed, and comprises preparing a cationic acrylamide (CPAM) prepolymer having a predetermined cationic monomer, selectively glyoxalating the CPAM prepolymer in aqueous media during glyoxalation to give the GPAM resin, and combining the GPAM and APAM resins. The method may be carried out in situ during a papermaking process (i.e., as an on-site method), and may be implemented in different forms during the process of forming paper.

Abstract: A cationic polyacrylamide (cPAM) and methods of making and using the same are disclosed. The cPAM comprises the radical polymerization reaction product of an acrylamide (AM) monomer, a cationic monomer, and, optionally, one or more additional ethylenically unsaturated monomer(s). A glyoxalated polyacrylamide (gPAM) resin is also disclosed, and comprises the reaction product of a glyoxalation agent and the cationic polyacrylamide (cPAM). An additive composition for papermaking is also disclosed, along with methods of preparing and using the same. The additive composition comprises an aqueous media and the glyoxalated polyacrylamide (gPAM) resin dispersed therein. The preparation methods provide for low product impurities at the cPAM, gPAM, and paper product stages.