Retention and drainage in the manufacture of paper
OwnerJohn Harrington, Robert Gelman +1inventors
InventorsJohn Harrington, Robert Gelman, Frank Sutman
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Abstract
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.
Claims22
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.
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.
Dependencies are inferred from the claim text.