Retention and drainage in the manufacture of paper
OwnerJohn Harrington, Frank Sutman +1inventors
InventorsJohn Harrington, Frank Sutman, Robert Gelman
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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 microparticle and optionally a siliceous material to a papermaking slurry. Additionally, a composition comprising an associative polymer and a microparticle and optionally further comprising cellulose fiber is disclosed.
Claims16
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 polymeric microparticle, 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 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 3:10.
A composition comprising an associative polymer and a polymeric microparticle wherein the water soluble copolymer 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 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 3:10.
Dependencies are inferred from the claim text.