Emulsification of Alkenyl Succinic Anhydride with an Amine-Containing Homopolymer of Copolymer

A method of sizing paper produced by a papermaking process, the method comprising:

• adding an oil-in-water emulsion to the papermaking process;
• wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising from 10 to 60 mole percent of at least one amine-containing vinyl- or allyl-monomer, and the remainder of the polymer comprising a nonionic monomer selected from the group consisting of:
• acrylamide, methacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N-isopropylacrylamide, N-vinylformamide, N-vinylmethylacetamide, N-vinyl pyrrolidone, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, N-t-butylacrylamide, N-methylolacrylamide, vinyl acetate, vinyl alcohol, and combinations thereof;
• wherein the oil-in-water emulsion has an emulsion particle size ranging from about 0.01 to about 10 microns and is added in an amount sufficient to size the paper produced by the papermaking process.