Patent ID: 8857966

Claim:
An inkjet printing ink comprising (A) a pigment dispersion having a mean particle diameter of 200 nm or less and a maximum particle size of 500 nm or less, consisting of a pigment, a water-soluble pigment dispersant, and a hydrophilic solvent, (B) a water-soluble fixing agent, and (C) a crosslinking agent, and having properties of crosslinking and being fixed on a fiber by heating, wherein the water-soluble pigment dispersant in (A) is an emulsion polymer having a molecular weight of 2,000-20,000 consisting of (1) 20-80 parts of (meth)acrylic acid ester monomer represented by CH 2 ═CR 1 —COOR 2 (wherein R 1 denotes a hydrogen atom or a methyl group, R 2 denotes an alkyl group with a carbon number of 2-8), (2) 80-20 parts of an aliphatic vinyl monomer comprising a carboxyl group, and (3) 0-20 parts of an aliphatic vinyl monomer comprising a non-carboxylic crosslinking functional group, which is neutralized by a basic substance; the water-soluble fixing agent (B) comprises a crosslinking functional group; and the crosslinking agent (C) comprises a functional group that crosslinks the crosslinking functional group of the water-soluble pigment dispersant in (A) and the crosslinking functional group of the water-soluble fixing agent (B) at a temperature of 100° C. or more.