INVERT SIZE FOR THE PULP SIZING AND SURFACE SIZING OF PAPER

摘要

of the disclosure An invert size for the engine and tub sizing of paper. It contains an aqueous dispersion of a fortified, unfortified, hydrogenated, or disproportionated and optionally esterified rosin or mixture of such rosins and of a dispersant that contains digested casein or an emulsifier of the general formula ¢R-(OCH2CH2)n-O-A!? Mx+ (I) wherein R is an alkylphenyl, alkyl, or alkenyl group or a cycloalkyl group with condensed rings, A is a group with the formula -CH2COO or -SO3, Mx+ is a cation, x is 1 or 2, and n is a number such that approximately 21 to 76% of the molecular weight of the anion is in the -OCH2CH2 group. To allow sizing control, the dispersant also contains cationic starch.