Patent ID: 6743335
Filing Date: 2004-06-01
Classification: B32B,D21H

Abstract:
A method for sizing paper, comprising intermixing a sizing emulsion comprised of (i) alkenyl succinic anhydride, alkyl ketene dimer, or mixtures thereof, and (ii) a water-soluble polymer comprised of ammonium groups that are attached to said polymer by at least two chemical bonds, with a paper stock, or applying said sizing emulsion to a paper web, and forming paper from said paper web or said paper stock, wherein said sizing emulsion is used in an amount effective to size said paper, and wherein said paper, when contacted with a liquid having a pH of about 8 or greater, emits a lower level of alkyl amines than when said sizing emulsion is comprised of, instead of said (ii), the same amount of a water-soluble polymer comprised of ammonium groups that are attached to said polymer by only one chemical bond.