| abstract |
(57) [Summary] [PROBLEMS] To provide excellent water-based dispersibility, high print density and print quality, quick drying, excellent abrasion resistance and fixability, and water resistance, light resistance, And a water-based ink composition capable of obtaining a recorded matter having excellent chemical resistance. SOLUTION: The aqueous ink composition has a general formula (I): [D is a portion containing a hydrophobic segment; L 1 and L 2 are the same or different linker groups; R 1 , R 2 , R 3 , and R 4 are an alkyl group or a cyano group having 1 to 4 carbon atoms; An integer greater than or equal to 1] In the presence of a polymer azo initiator and a vinyl polymerizable dispersant containing a repeating unit of the above, under conditions where the initiator is not activated, disperse a water-insoluble colorant, in the resulting dispersion, A microencapsulated colorant obtained by activating the initiator to polymerize the polymerizable dispersant. |