Patent ID: 8088209

Claim:
A method of preparing a sizing composition for paper manufacture comprising: (a) providing a cationic liquid starchy composition having: a dry matter of between 10 and 50%, a viscosity, determined according to a T test, of at least equal to 275 mPa·s and at most equal to 930 mPa·s, a total nitrogen level at least equal to 0.6% and at most equal to 1.4%, these percentages being expressed by dry weight with respect to the dry weight of the composition, and a pH of between 3.5 and less than 9; (b) diluting the cationic liquid starchy composition to a dry matter value of between 0.5 and 9%; and (c) mixing the diluted cationic liquid starchy composition with a sizing agent comprising alkenylsuccinic anhydride to obtain a resulting composition.