Retention and drainage in the manufacture of paper
A method of improving retention and drainage in a papermaking process is disclosed. The method provides for the addition of an associative polymer, a polyelectrolyte and optionally a siliceous material to the papermaking slurry. Additionally, a composition comprising an associative polymer, and a polyelectrolyte and optionally further comprising cellulose fiber is disclosed.
1 . A method of improving retention and drainage in a papermaking process wherein the improvement comprising adding to a papermaking slurry, an associative polymer and at least one synthetic polyelectrolyte, wherein the associative polymer comprising the formula:
B-co-F (I)
wherein B is a nonionic polymer segment comprising one or more ethylenically unsaturated nonionic monomers; F is an polymer segment comprising at least one ethylenically unsaturated anionic or ethylenically unsaturated cationic monomer; and the molar percent ratio of B:F is 99:1 to 1:99 and wherein the associative polymer has associative properties provided by an effective amount of at least emulsification surfactant chosen from diblock or triblock polymeric surfactants, and wherein the amount of the at least one diblock or triblock surfactant to monomer is at least about 3:100, wherein the at least one synthetic polyelectrolyte is selected from the group consisting of cationic copolymers with 20 mole percent or greater cationic monomer content, an anionic copolymer with 20 mole percent or less anionic monomer content, polyamines, poly-diallyidimethylammonium chlorides, polyamidoamine-epichlorohydrin resins, or modified polyethyleneimines.
2 . The method of claim 1 wherein at least one synthetic polyelectrolyte is selected from the group consisting of cationic copolymers with 20 mole percent or greater cationic monomer content; and an anionic copolymer with 20 mole percent or less anionic monomer content; and wherein the cationic or anionic copolymer comprising at least one non-ionic monomer selected from acrylamide, methacrylamide, N,N-dialkylacrylamides, N-alkylacrylamides, N-vinyl methacetamide, N-vinyl formamide, N-vinyl methyl formamide, and N-vinyl pyrrolidone.
3 . The method of claim 2 wherein the at least one synthetic polyelectrolyte is a anionic copolymer with 20 mole percent or less anionic monomer content wherein the anionic copolymer comprises at least one anionic monomer selected from the free acid or salt of: acrylic acid; methacrylic acid, maleic acid; itaconic acid; acrylamidoglycolic acid; 2-acrylamido-2-methyl-1-propanesulfonic acid; 3-allyloxy-2-hydroxy-1-propanesulfonic acid; styrenesulfonic acid; vinylsulfonic acid; vinylphosphonic acid; 2-acrylamido-2-methylpropane phosphonic acid.
4 . The method of claim 3 wherein the at least one synthetic polyelectrolyte is a anionic copolymer with 20 mole percent or less anionic monomer content wherein the anionic copolymer comprises at least one anionic monomer selected from the free acid or salt of: acrylic acid, methacrylic acid, and styrenesulfonic acid.
5 . The method of claim 2 wherein the at least one synthetic polyelectrolyte is a cationic copolymer with 20 mole percent or greater cationic monomer content wherein the cationic copolymer comprises at least one cationic monomer selected from the free base or salt of: diallyidimethylammonium halide; dialkylaminoalkyl (meth)acrylate, diethylaminoethyl (meth)acrylate, dimethyl aminopropyl (meth)acrylate, 2-hydroxydimethyl aminopropyl (meth)acrylate, aminoethyl (meth)acrylate, N,N-dimethylaminoethylacrylamide, and acryloyloxyethyl trimethyl ammonium chloride.
6 . The method of claim 5 wherein the at least one synthetic polyelectrolyte is a cationic copolymer with 20 mole percent or greater cationic monomer content wherein the cationic copolymer comprises at least one cationic monomer selected from the free base or salt of: N,N-dimethylaminoethylacrylamide, and acryloyloxyethyl trimethyl ammonium chloride.
7 . The method of claim 1 wherein the at least one synthetic polyelectrolyte is selected from the group consisting of polyamidoamine-epihalohydrin resins; polyamines; polyimines; and derivatives of any of the preceding.
8 . The method of claim 7 wherein the at least one synthetic polyelectrolyte comprises polyamidoamine-epihalohydrin resins or derivatives thereof.
9 . The method of claim 1 further comprising a siliceous material.
10 . The method of claim 9 wherein the siliceous material is selected from the group consisting of silica based particles, silica microgels, amorphous silica, colloidal silica, anionic colloidal silica, silica sols, silica gels, polysilicates, polysilicic acid, and combinations thereof.
11 . The method of claim 1 wherein the at least one synthetic polyelectrolyte comprises a polyamine or derivatives thereof.
12 . The method of claim 1 wherein the associative polymer is anionic.
13 . The method of claim 1 wherein the associative polymer comprises acrylamide and the free acid or salt of acrylic acid.
14 . A composition comprising an associative polymer and at least one synthetic polyelectrolyte wherein the associative polymer comprising the formula:
B-co-F- (I)
wherein B is a nonionic polymer segment comprising one or more ethylenically unsaturated nonionic monomers; F is an polymer segment comprising at least one ethylenically unsaturated anionic or ethylenically unsaturated cationic monomer; and the molar percent ratio of B:F is 99:1 to 1:99 and wherein the associative polymer has associative properties provided by an effective amount of at least emulsification surfactant chosen from diblock or triblock polymeric surfactants, and wherein the amount of the at least one diblock or triblock surfactant to monomer is at least about 3:100, wherein the at least one synthetic polyelectrolyte is selected from the group consisting of cationic copolymers with 20 mole percent or greater cationic monomer content, an anionic monomer copolymer with 20 mole percent or less anionic monomer content, polyamines, poly-diallyldimethylammonium chlorides, polyamidoamine-epichlorohydrin resins, or modified polyethyleneimines.
15 . The composition of claim 14 further comprising cellulosic fiber.
16 . The composition of claim 14 wherein at least one synthetic polyelectrolyte is selected from the group consisting of cationic copolymers with 20 mole percent or greater cationic monomer content; and an anionic copolymer with 20 mole percent or less anionic monomer content; and wherein the cationic or anionic copolymer comprises at least one non-ionic monomer selected from acrylamide, methacrylamide, N,N-dialkylacrylamides, N-alkylacrylamides, N-vinyl methacetamide, N-vinyl formamide, N-vinyl methyl formamide, and N-vinyl pyrrolidone.
17 . The composition of claim 16 wherein the at least one synthetic polyelectrolyte is a anionic copolymer with 20 mole percent or less anionic monomer content wherein the anionic copolymer comprises at least one anionic monomer selected from the free acid or salt of: acrylic acid; methacrylic acid, maleic acid; itaconic acid; acrylamidoglycolic acid; 2-acrylamido-2-methyl-1-propanesulfonic acid; 3-allyloxy-2-hydroxy-1-propanesulfonic acid; styrenesulfonic acid; vinylsulfonic acid; vinylphosphonic acid; 2-acrylamido-2-methylpropane phosphonic acid.
18 . The composition of claim 17 wherein the at least one synthetic polyelectrolyte is a anionic copolymer with 20 mole percent or less anionic monomer content wherein the anionic copolymer comprises at least one anionic monomer selected from the free acid or salt of: acrylic acid, methacrylic acid, and styrenesulfonic acid.
19 . The composition of claim 16 wherein the at least one synthetic polyelectrolyte is a cationic copolymer with 20 mole percent or greater cationic monomer content wherein the cationic copolymer comprises at least one cationic monomer selected from the free base or salt of: diallyidimethylammonium halide; dialkylaminoalkyl (meth)acrylate, diethylaminoethyl (meth)acrylate, dimethyl aminopropyl (meth)acrylate, 2-hydroxydimethyl aminopropyl (meth)acrylate, aminoethyl (meth)acrylate, N,N-dimethylaminoethylacrylamide, and acryloyloxyethyl trimethyl ammonium chloride.
20 . The composition of claim 19 wherein the at least one synthetic polyelectrolyte is a cationic copolymer with 20 mole percent or greater cationic monomer content wherein the cationic copolymer comprises at least one cationic monomer selected from the free base or salt of: N,N-dimethylaminoethylacrylamide, and acryloyloxyethyl trimethyl ammonium chloride.
21 . The composition of claim 14 wherein the at least one synthetic polyelectrolyte is selected from the group consisting of polyamidoamine-epihalohydrin resins; polyamines; polyimines; and derivatives of any of the preceding.
22 . The composition of claim 14 wherein the at least one synthetic polyelectrolyte comprises polyamidoamine-epihalohydrin resins or derivatives thereof.