Toner
A toner having a toner particle containing an amorphous resin, a crystalline resin, a colorant, a release agent, and a polymer in which a styrene-acrylic polymer is graft-polymerized on a polyolefin, wherein the amorphous resin contains an amorphous polyester resin A, and the amorphous polyester resin A has a monomer unit derived from polyhydric alcohol and a monomer unit derived from polyhydric carboxylic acid, has, a particular amount of a succinic acid-derived monomer unit in the monomer unit derived from polyhydric carboxylic acid, and has, a particular amount of a monomer unit derived from a propylene oxide adduct on bisphenol A in the monomer unit derived from polyhydric alcohol; and has a particular softening point, a particular solubility parameter, and a particular peak molecular weight.
1. A toner comprising: a toner particle containing:
an amorphous resin,
a crystalline resin,
a colorant,
a release agent, and
a polymer in which a styrene-acrylic polymer is graft-polymerized on a polyolefin,
wherein
the amorphous resin contains an amorphous polyester resin A, and
the amorphous polyester resin A
(1) has a monomer unit derived from polyhydric alcohol and a monomer unit derived from polyhydric carboxylic acid,
has a content, in the monomer unit derived from polyhydric carboxylic acid, of at least 20.0 mol % and not more than 60.0 mol % of a succinic acid-derived monomer unit, and
has a content, in the monomer unit derived from polyhydric alcohol, of at least 90.0 mol % and not more than 100.0 mol % of a monomer unit derived from a propylene oxide adduct on bisphenol A,
(2) has a softening point of at least 85° C. and not more than 95° C.,
(3) has a solubility parameter [SP(A)], determined based on Fedors' equation, of at least 12.30 and not more than 12.40, and
(4) has a peak molecular weight [Mp(A)] of at least 4,000 and not more than 5,000.
2. The toner according to claim 1 , wherein
the crystalline resin comprises a crystalline polyester resin C, and
the crystalline polyester resin C has a solubility parameter [SP(C)], determined based on Fedors' equation, of at least 11.00 and not more than 11.40.
3. The toner according to claim 1 , wherein the styrene-acrylic polymer comprises a monomer unit derived from a cycloalkyl (meth)acrylate.