| abstract |
Provided is a polymer that improves the dispersibility of each color pigment in a water-insoluble solvent. Provided are a pigment composition, a pigment dispersion, and a toner having good coloring power. A polymer having a monomer unit having a phthalocyanine structure. (I) a step of polymerizing a polymerizable monomer having a hydroxyl group to obtain a polymer having a hydroxy group; (ii) reacting a hydroxyl group of the polymer with a phthalonitrile having a leaving group to form an ether bond. A step of introducing phthalonitrile into the polymer through (iii) a method of reacting the phthalonitrile introduced into the polymer to form a phthalocyanine ring. Pigment compositions, pigment dispersions, and toners having the polymer, carbon black or phthalocyanine pigment. [Selection figure] None |