Toner
A toner is provided that comprises a toner particle comprising a binder resin and a wax, and an inorganic fine particle on a surface of the toner particle, wherein the binder resin comprises a resin A; the toner satisfies 2.50≤SPa−SPw≤4.50, where SPa (cal/cm 3 ) 0.5 is the SP value of the resin A, and SPw (cal/cm 3 ) 0.5 is the SP value of the wax; the inorganic fine particle comprises a silica fine particle whose surface has been treated with a silicone oil; in a 29 Si solid-state NMR measurement of the silica fine particle, 30≤B≤60 and 4.0≤A/B≤6.0 are satisfied, taking A as an integration value of a D unit obtained by taking an integration value of a Q unit in a CP/MAS measurement as 100, and taking B as an integration value of a D unit obtained by taking an integration value of a Q unit in a DD/MAS measurement as 100.
1. A toner comprising
a toner particle comprising a binder resin and a wax, and
an inorganic fine particle on a surface of the toner particle,
wherein the binder resin comprises a resin A;
taking SPa (cal/cm 3 ) 0.5 as an SP value of the resin A calculated in accordance with the Fedors method, and
taking SPw (cal/cm 3 ) 0.5 as an SP value of the wax calculated in accordance with the Fedors method,
the SPa and the SPw satisfy Expression (1) below:
2.50≤ SPa−SPw≤ 4.50 (1),
the inorganic fine particle comprises a silica fine particle whose surface has been treated with a silicone oil;
in a 29 Si solid-state NMR measurement of the silica fine particle,
taking A as an integration value of a D unit worked out by taking an integration value of a Q unit in a CP/MAS measurement as 100, and
taking B as an integration value of a D unit worked out by taking an integration value of a Q unit in a DD/MAS measurement as 100,
the A and the B satisfy Expressions (2) and (3) below:
30≤ B≤ 60 (2)
4.0≤ A/B≤ 6.0 (3).
2. The toner according to claim 1 , wherein the resin A is a polyester resin.
3. The toner according to claim 1 , wherein a content of the resin A in the toner particle is 0.5 mass % or higher.
4. The toner according to claim 1 , wherein the SPa satisfies Expression (4) below:
10.50≤ SPa≤ 12.80 (4).
5. The toner according to claim 1 , wherein the SPw satisfies Expression (5) below:
7.90≤ SPw≤ 9.60 (5).
6. The toner according to claim 5 , wherein the SPw satisfies Expression (6) below:
7.90≤ SPw≤ 9.20 (6).
7. The toner according to claim 1 ,
wherein the inorganic fine particle comprises the silica fine particle,
the silica fine particle is a surface-treated product in which a silica fine particle before surface treatment is treated on a surface with the silicone oil, and
a treatment amount by the silicone oil is 15.0 to 40.0 parts by mass relative to 100 parts by mass of the silica fine particle before surface treatment.
8. The toner according to claim 1 , wherein the resin A has a monomer unit represented by Formula (A) below:
9. The toner according to claim 1 , wherein the silicone oil comprises a modified silicone oil.
10. The toner according to claim 9 , wherein the silicone oil further comprises a polydimethylsiloxane represented by Formula (D) below:
in the formula, n is an integer from 30 to 200.
11. The toner according to claim 1 , wherein the silicone oil comprises a modified silicone oil represented by Formula (B) below:
in the formula, R 1 is a carbinol group, a hydroxy group, an epoxy group, a carboxy group, an alkyl group or a hydrogen atom; R 2 is a carbinol group, a hydroxy group, an epoxy group, a carboxy group or a hydrogen atom; m is an integer from 30 to 200; and each alkyl group in a side chain of Formula (B) is optionally substituted with a carbinol group, a hydroxy group, an epoxy group, a carboxy group or a hydrogen atom.
12. The toner according to claim 11 , wherein the modified silicone oil represented by Formula (B) is a modified silicone oil represented by Formula (C) below:
in the formula, p is an integer from 30 to 200.
13. The toner according to claim 1 ,
wherein the inorganic fine particle comprises the silica fine particle;
the silica fine particle is a surface-treated product in which a silica fine particle before surface treatment is treated on a surface with the silicone oil; and
a number-average particle diameter of a primary particle of the silica fine particle before surface treatment is 5 to 35 nm.
14. The toner according to claim 1 , wherein a number-average particle diameter of a primary particle of the silica fine particle before surface treatment is 5 to 30 nm.