| abstract |
The present invention discloses a surfactant-mediated, free radical initiated emulsion/dispersion polymerization of n-vinylformamide with a styrene or substituted styrene copolymer, and carrying a methotrexate, amine and styrene functional group Subsequent hydrolysate. The invention also discloses methods for polymerization, polymer compositions, and hydrolysis of such polymers. Such polymers bearing cationic functional groups can be used as dry strength additives, wet strength additives, retention aids, drainage aids, sizing agents, sizing accelerators, and resin and adhesive control agents in papermaking applications. |