Retention and drainage in the manufacture of paper

A method of improving retention and drainage in a papermaking process comprising:

• adding to a papermaking slurry, an associative polymer and an about 50% hydrolyzed poly(vinylamine) in a ratio between 1:1 and 1:2.5 by mass,
• wherein the associative polymer comprises the formula (I);
• B-co-F (I)
• wherein B is a nonionic polymer segment comprising one or more ethylenically unsaturated nonionic monomers, F is a 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 one 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.

A method of improving retention and drainage in a papermaking process comprising adding to a papermaking slurry, an associative polymer and a poly(vinylamine), wherein the poly(vinylamine) has been hydrolyzed between about 50% and 100%, wherein the associative polymer and the poly(vinylamine) are added at a ratio of approximately 1:2.5 by mass, and

• wherein the associative polymer comprises the formula (I):
• B-co-F (I)
• wherein B is a nonionic polymer segment comprising one or more ethylenically unsaturated nonionic monomers;
• F is a polymer segment comprising at least one ethylenically unsaturated anionic 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 one 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.

A method of improving retention and drainage in a papermaking process comprising adding to a papermaking slurry, an associative polymer, a poly(vinylamine), and silica, wherein the poly(vinylamine) is about 50% hydrolyzed, wherein the associative polymer and the poly(vinylamine) are added at a ratio of between 1:0.25 and 1:1 by mass, respectively, and

• wherein the associative polymer comprises the formula (I):
• B-co-F (I)
• wherein B is a nonionic polymer segment comprising one or more ethylenically unsaturated nonionic monomers;
• F is a polymer segment comprising at least one ethylenically unsaturated anionic 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 one 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.