Patent ID: 8895646
Filing Date: 2014-11-25
Classification: C08F,C08K,C09B,C09D

Abstract:
1. A pigment dispersion for use as a colorant for an oil-based product, the pigment dispersion comprising: a dispersion medium, which comprises at least one medium selected from the group consisting of monomers, organic solvents, thermoplastic resins, thermosetting resins, and UV/ER-curable resins; and a resin-treated pigment dispersed in the dispersion medium, wherein a resin-treated pigment comprises: the polymer block A formed of the A chain in the A-B block copolymer is an acrylic polymer that is miscible with the dispersion medium, and the polymer block B formed of the B chain in the A-B block copolymer is an acrylic polymer comprising the addition-polymerizable monomer having the UV-absorbing group, and the polymer block B includes 70 mass % or more of a total mass of the addition-polymerizable monomer included in the A-B block copolymer, and a weight ratio of the pigment to the polymer (pigment:polymer) is from 50 to 95 of the pigment to from 50 to 5 of the polymer, wherein the pigment is encapsulated with the acrylic A-B block copolymer.