Magenta toner and toner kit
Provided is a magenta toner having a magenta toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester, wherein the wax dispersant is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group, the colorant contains C.I. Pigment Red 32, and when observing a cross-section of the magenta toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester are dispersed in the cross-section, and the number average value of maximum lengths of the crystals is 50 nm or less.
1. A magenta toner comprising a magenta toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester,
wherein the wax dispersant is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group,
the colorant contains Compound (1) represented by Formula below,
a content of the compound (1) in the magenta toner particles is 0.5 parts by mass or more and 20.0 parts by mass or less with respect to 100 parts by mass of the binder resin,
the colorant further contains, in addition to the compound (1), at least one compound selected from the group consisting of a naphthol-based compound, a quinacridone-based compound, and a lake compound thereof,
when observing a cross-section of the magenta toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester are dispersed in the cross-section, and
the number average value of maximum lengths of the crystals is 50 nm or less.
2. The magenta toner according to claim 1 , wherein the binder resin contains an amorphous polyester resin.
3. The magenta toner according to claim 1 , wherein a content of the crystalline polyester in the magenta toner particle is 1.0 part by mass or more and 15.0 parts by mass or less with respect to 100 parts by mass of the binder resin.
4. The magenta toner according to claim 1 , wherein the monomer unit having a saturated alicyclic group has the following structure:
(in Formula, R represents a hydrogen atom or a methyl group).
5. The magenta toner according to claim 1 , wherein a content of the colorant in the magenta toner particle is 5.0 parts by mass or more and 25.0 parts by mass or less with respect to 100 parts by mass of the binder resin.
6. A toner kit comprising:
a cyan toner, a black toner, a yellow toner, and a magenta toner,
wherein the magenta toner has a magenta toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester,
the wax dispersant is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group,
the colorant contains Compound (1) represented by Formula below,
a content of the compound (1) in the magenta toner particle is 0.5 parts by mass or more and 20.0 parts by mass or less with respect to 100 parts by mass of the binder resin,
the colorant further contains, in addition to the compound (1), at least one compound selected from the group consisting of a naphthol-based compound, a quinacridone-based compound, and a lake compound thereof,
when observing a cross-section of the magenta toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester are dispersed in the cross-section,
the number average value of maximum lengths of the crystals is 50 nm or less,
the black toner is a black toner having a black toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester,
the yellow toner is a yellow toner having an yellow toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester,
the cyan toner is a cyan toner having a cyan toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester,
each of the wax dispersants in the black toner particle, the yellow toner particle, and the cyan toner particle is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group, and
when observing a cross-section of each of the black toner particle, the yellow toner particle, and the cyan toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester observed in a needle shape are dispersed in each cross-section, and the number average value of long axis lengths of the crystals to be observed is 60 nm or more and 250 nm or less, respectively.
7. The toner kit according to claim 6 , wherein the binder resin in the black toner particle, the yellow toner particle, and the cyan toner particle contains an amorphous polyester resin, respectively.
8. The toner kit according to claim 6 , wherein each content of the crystalline polyester in the black toner particle, the yellow toner particle, and the cyan toner particle is 1.0 part by mass or more and 15.0 parts by mass or less with respect to 100 parts by mass of the binder resin.
9. The toner kit according to claim 6 , wherein the monomer unit having a saturated alicyclic group of the wax dispersant in the black toner particle, the yellow toner particle, and the cyan toner particle has the following structure:
(in Formula, R represents a hydrogen atom or a methyl group).
10. The toner kit according to claim 6 , wherein a solubility parameter SP1 of the crystalline polyester and a solubility parameter SP2 of the wax dispersant in the magenta toner particle, the black toner particle, the yellow toner particle, and the cyan toner particle satisfy the relationship of Formula below, respectively:
0≤SP1−SP2≤1.3.