Glyoxalated Polyacrylamide Terpolymer, Base Copolymer Thereof, Compositions Containing Same, Uses In Papermaking And Products Thereof
AssigneeBuckman Laboratories International, Inc.
InventorsSamuel Tekobo, John Caster
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Abstract
Glyoxalated polyacrylamide terpolymers and compositions formulated with them are described. These glyoxalated polyacrylamide terpolymers and compositions thereof, can have extended shelf lives and can be used as additives for papermaking, such as providing improved papermaking retention/drainage, and paper products with improved dry and/or temporary wet strength.
Claims29
A terpolymer comprising at least one glyoxal monomer unit, at least one primary amide-containing monomer unit, and at least one cationic monomer unit, wherein the at least one cationic monomer unit is a quaternary ammonium alkyl(meth)acrylate salt.
A terpolymer obtained from a reaction between glyoxal and a base copolymer, wherein the base copolymer comprises a reaction product of at least one primary amide-containing monomer and at least one cationic monomer copolymerizable with the primary amide-containing monomer, wherein the at least one cationic monomer is a quaternary ammonium alkyl(meth)acrylate salt.
A base copolymer comprising a reaction product of at least one primary amide-containing monomer and at least one cationic monomer copolymerizable with the primary amide-containing monomer, wherein the at least one cationic monomer is a quaternary ammonium alkyl(meth)acrylate salt, and the reaction product is a glyoxalatable copolymer in particle form.
A process for making a terpolymer comprising:
- copolymerizing from about 20 wt % to about 45 wt % of primary amide-containing monomer and from about 30 wt % to about 55 wt % of cationic monomer, that is copolymerizable with the primary amide-containing monomer, to form a base copolymer, wherein the cationic monomer comprises a quaternary ammonium alkyl(meth)acrylate salt;
- and
- copolymerizing the base copolymer with glyoxal to form a terpolymer.
Dependencies are inferred from the claim text.