摘要:
The invention relates to a pigment dispersion comprising: a condensate of or a salt between a polyallylamine and a polyester having a free carboxylic acid or the salt; a pigment derivative represented by the following general formula (1); a pigment; and an organic solvent, (PnullX)nullnullN(R1, R2, R3, R4)nullnullnullnullgeneral formula (1) wherein P represents an organic dyestuff residue; X represents a sulfonic acid group or a carboxylic acid group; R1 represents an alkyl group having 5 to 20 carbon atoms; and R2, R3 and R4 each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms.
摘要:
The invention relates to a nonaqueous ink-jet ink comprising at least two kinds of mixed organic solvents, a pigment and a resin, wherein all of the following mathematical formulae (1) (2) and (3) are satisfied in which when the total amount of the mixed organic solvents is regarded as 1, weight ratios of the respective organic solvents are x1, x2 . . . xn wherein n represents an integer; vapor pressures (mmHg) of the respective organic solvents at 20null C. are y1, y2 . . . yn wherein n represents an integer; Anullx1y1nullx2y2null . . . nullxnyn; and Bnullx1/y1nullx2/y2null . . . nullxn/yn: 5>A>0.1nullnullmathematical formula (1) 10>B>1nullnullmathematical formula (2) 8>(BnullA)>0.1nullnullmathematical formula (3).
摘要:
The present invention relates to an aqueous pigment dispersion that shows excellent dispersibility and storage stability, an inkjet ink that shows excellent jetability, water resistance, and adhesion, and a process for producing an aqueous pigment dispersion that shows excellent dispersibility and storage stability, as well as superior jetability, water resistance and adhesion. An aqueous pigment dispersion of the present invention comprises a dispersion formed by dispersing a monoalkyl maleate graft polymer of a maleic anhydride/null-olefin copolymer in water in the presence of a base, a pigment, and an aqueous medium.