TONER

摘要

The present invention is a toner including toner particles prepared by forming particles of a polymerizable monomer composition including a polymerizable monomer, a pigment, a pigment dispersant and a crystalline polyester resin in an aqueous medium, and polymerizing the polymerizable monomer, wherein the polymerizable monomer is a polymerizable monomer for preparing a vinyl copolymer, the difference in an SP value between the pigment dispersant and the crystalline polyester resin is −1.5 to +0.8, the difference in an SP value between the pigment dispersant an the vinyl copolymer is −1.1 to +1.2, the pigment dispersant has a polymer component and an adsorbable component adsorbed to the pigment, the polymer component is a vinyl polymer, the polymer component of the pigment dispersant has a number average molecular weight of 3,000 to 20,000, and a rate of adsorption of the pigment dispersant to the pigment is 30% or more.

主权项

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.