Cationic polyurethane resin aqueous dispersion, ink-jet receiving agent including the same, and ink-jet recording medium using the same

An ink-jet receiving agent, which includes:

• a cationic polyurethane resin (B) containing a structural unit (A) represented by general formula (I);
• a water-soluble resin (H);
• water-soluble polyvalent metallic salt (J);
• and
• an aqueous medium into which said resins and salt are dispersed:
• and
• the content of a cationic amino group of the structural unit (A) included in the cationic polyurethane resin (B) is 0.005 to 1.5 equivalents/kg.
• (In the formula, R1 represents an alkylene group which may include an alicyclic structure, a residue of bivalent phenol, or polyoxyalkylene group, R2 and R3 each independently represents an alkyl group which may include alicyclic structure, and R4 represents a hydrogen atom or a residue of the quaternizing agent which is introduced by the quaternizing reaction, and X− represents an anionic counter ion.)