| abstract |
A problem of the invention is to provide a recordingnliquid capable of giving a printed matter which is high innprinting density, is suppressed in blur, has high printingnquality, and has good fastness of a recorded matter includingnlight fastness, water fastness and the like and having a lownviscosity, good discharge properties and excellent storagenstability. n The invention is concerned with a polyvinyl alcohol basednblock copolymer represented by the following general formulan(1), a pigment dispersion aqueous liquid containing thisnpolyvinyl alcohol based block copolymer and a pigment in annaqueous medium, and a recording liquid containing this pigmentndispersion aqueous liquid.n n (In the foregoing general formula (1), A represents anpolyvinyl alcohol based block; B represents a block containingna hydrophobic segment B' and a hydrophilic or hydrophobicnsegment B" other than A and B'; X 1 , X 2 , X 3 , and X 4 eachnindependently represents a hydrogen atom, a halogen atom, annalkyl group, an aryl group, or an aralkyl group (provided that nsuch an organic group has from 1 to 20 carbon atoms and maynbe linear, branched or cyclic), and X 1 , X 2 , X 3 , and X 4 may bendifferent from each other; m1 represents an integer of fromn1 to 5; m2 represents an integer of from 0 to 4; and (m1 + m2)nrepresents an integer of from 1 to 5.) |