Patent ID: 9229345
Filing Date: 2016-01-05
CPC Classification: G03G

Claim Text:
1. A toner comprising toner particles prepared by forming particles of a polymerizable monomer composition comprising a polymerizable monomer, a pigment, a pigment dispersant and a crystalline polyester resin in an aqueous medium, and polymerizing the polymerizable monomer contained in the particles, wherein the polymerizable monomer is a polymerizable monomer for preparing a vinyl copolymer, the pigment dispersant satisfies (i) to (v): (i) a difference (A−B) between an SP value (A) of the pigment dispersant and an SP value (B) of the crystalline polyester resin is −1.5 or more and +0.8 or less, (ii) a difference (A−C) between the SP value (A) of the pigment dispersant and an SP value (C) of the vinyl copolymer is −1.1 or more and +1.2 or less, (iii) the pigment dispersant contains a polymer component and an adsorbable component adsorbed to the pigment, and the polymer component is a vinyl polymer, (iv) the polymer component of the pigment dispersant has a number average molecular weight (Mn) of 3,000 or more and 20,000 or less, and (v) a rate of adsorption of the pigment dispersant to the pigment is 30% or more.