| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink composition which dries quickly and exhibits decreased blur between colors. SOLUTION: This ink composition contains water a colorant, and a linear ASBS'A' block copolymer. A and A' are each a polymer block comprising at least one repeating monomer unit comprising ethylene oxide units, propylene oxide units, or randomly or alternately arranged ethylene oxide units and propylene oxide units. B is a polymer block comprising at least one repeating monomer unit comprising alkylsiloxane units, dialkylsiloxane units, alkylarylsiloxane units, diarylsiloxane units, or a mixture of these units. S is a spacer group inserted as necessary into between block B and block A. S' is a spacer block inserted as necessary into between block B and block A'. |
