Aqueous rosin emulsion and dispersant composition useful therein

摘要

PCT No. PCT/JP91/00460 Sec. 371 Date Dec. 9, 1991 Sec. 102(e) Date Dec. 9, 1991 PCT Filed Apr. 8, 1991 PCT Pub. No. WO91/16128 PCT Pub. Date Oct. 31, 1991.This invention provides a dispersing agent suitable for the production of an aqueous rosin emulsion which contains as an active ingredient a copolymer salt containing a certain oxyalkylene-containing monomer unit and a tertiary and/or quaternary nitrogen-containing monomer unit and a dispersing agent suited to the production of aqueous rosin emulsions which contains at least one member of units of quaternary nitrogen-containing monomer having a hydroxyl group, units of quaternary nitrogen-containing monomer having a vinylbenzyl group and units of quaternary nitrogen-containing monomer having a maleimide group and at least one member of hydrocarbon monomer units and (meth)acrylate ester monomer units. The invention further provides an aqueous rosin emulsion as prepared using the above dispersing agent and a sizing agent containing the emulsion as an active ingredient.