Patent ID: 8722822

Claim:
An aqueous emulsion, comprising a dispersant comprising a polyvinyl alcohol-based resin and a polymer comprising, as a dispersoid, a structural unit derived from an ethylenically unsaturated monomer, wherein an average particle size of the dispersoid is from 100 to 450 nm and an apparent grafting efficiency of the polyvinyl alcohol-based resin based on the dispersoid is from 65 to 75%, which is obtained by adding a pre-emulsion dropwise to an aqueous medium to carry out emulsion polymerization, wherein the pre-emulsion is obtained by emulsifying and dispersing the ethylenically unsaturated monomer in water in the presence of the polyvinyl alcohol-based resin which comprises a 1,2-diol structural unit represented by the following formula (1) and has a degree of saponification of from 80 to 93% by mol: wherein in the formula, R 1 , R 2 , and R 3 each independently represents a hydrogen atom, X represents a single bond or a bonding chain, and R 4 , R 5 , and R 6 each independently represents a hydrogen atom.