| 摘要 |
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]x- 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.
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