Rosin emulsion composition, method of manufacture, sizing agents, it was sized methods and size paper

摘要

PURPOSE: To obtain a sizing agent exhibiting excellent sizing effect under a relatively mild drying condition by a high-speed papermaking machine not only in an acidic papermaking system but also even in a neutral papermaking system, having excellent mechanical stability and shelf stability. ;CONSTITUTION: This rosin-based emulsion composition is obtained by stably dispersing a dispersed phase containing (A) a glyceride, preferably an enhanced glyceride as an addition reaction product of a plant oil and/or an animal oil and an a#, β-unsaturated carboxylic acid, (B) a rosin-based substance, preferably enhanced rosin obtained by subjecting a rosin-based substance and an α, β-unsaturated carboxlic acid to addition reaction and (C) an emulsion dispersant and/or a dispersant composed of a protective colloid into water. The composition is preferably a dispersion obtained by dispersing 100 pts.wt. of the total of 1-50 pts.wt. of the component A, 30-98 pts.wt. of the component B and 1-20 pts.wt. of the component C, having 20-60wt.%. especially 30-50 pts.wt. of solid content concentration. 0.01-5wt.% of solid content, preferably 0.05-2wt.% of solid content of a sizing agent containing the composition based on the dry weight of an aqueous dispersion of pulp is added to the aqueous dispersion of pulp.;COPYRIGHT: (C)1995,JPO