The cationic emulsion having a polymer core shell structure, water-based ink and recording medium

The present invention, when used in an aqueous ink, excellent adhesion to a substrate, water resistance, moisture resistance, alcohol resistance, and exhibits high gloss, when used in a recording medium, excellent coloring property, the water resistance the cationic emulsion having a polymer core shell structure exhibits, i.e. made from the following components (a) and component (B) weight ratio of component (a): 25 of polymer core shell structure: component (B) = 25: 75 to 75 providing a cationic emulsion. (A) polymeric core component of the emulsion obtained by polymerizing a monomer having as a component the vinyl chloride monomer. (B) compounds of styrenes of the formula (1), or, as styrenes and compounds with compound (2) as the ester moiety number of 1 to 22 carbon (meth) constituent component and an acrylic ester of formula (1) has a structure obtained by polymerizing a monomer mixture comprising, polymeric shell component of the emulsion compound is the monomer mixture from 20 to 45 wt% of formula (1).