Aqueous fortified rosin dispersions

In the inversion process of preparing paper size from fortified rosin wherein molten fortified rosin and water containing a dispersing agent are first mixed to provide a water-in-oil emulsion wherein the molten fortified resin is the continuous phase and the water is the disperse phase and the emulsion is subsequently inverted by the addition of water to provide an emulsion wherein the water is the continuous phase and the fortified rosin is the disperse phase, the improvement wherein there is employed as the dispersing agent one or more water-soluble compounds of the formulae ##STR8## wherein in formula (I), R is a normal or branched chain alkyl containing from 4 through 18 carbon atoms;

• wherein in formula (II) R' is a normal or branched chain alkyl or alkenyl or fused ring cycloalkyl containing from 10 through 20 carbon atoms;
• wherein in formulas (I) and (II), n is an integer such that of the molecular weight of each anion, from about 27% to about 75% thereof is attributable to the (CH.sub.2 CH.sub.2 O) group, and M.sup.+ is a monovalent cation, other than hydrogen, that will allow substantial dissolution of said dispersing agent in water and will remain in solution during the preparation of the water-in-oil emulsion.