Patent ID: 9624623
Date: 2017-04-18
CPC Classifications: C08J,C08L,D21H

Claim:
1. 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 primary or secondary amine-containing 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.