Toner
Toner comprising a toner particle, the toner particle includes a toner core particle and an organosilicon polymer covering the toner core particle surface, the organosilicon polymer has a structure represented by R 4 —SiO 3/2 (R 4 each independently represents an alkyl group having 1 to 6 carbon atoms or a phenyl group), the toner core particle includes a resin A having a substituted or unsubstituted silyl group in a molecule thereof, a substituent of the substituted silyl group is at least one selected from the group consisting of an alkyl group having 1 or more carbon atoms, an alkoxy group having 1 or more carbon atoms, a hydroxy group, a halogen atom, and an aryl group having 6 or more carbon atoms, a content of silicon atoms in the resin A is 0.02 to 10.00% by mass, and a content of silicon atoms in the organosilicon polymer is 30 to 50% by mass.
1. A toner, comprising:
a toner particle, the toner particle includes comprising a toner core particle and an organosilicon polymer that coats a surface of the toner core particle, the organosilicon polymer having a structure represented by formula (A)
R 4 —SiO 3/2 (A)
where R 4 independently represents an alkyl group having 1 to 6 carbon atoms or a phenyl group; and
the toner core particle includes a resin A having an optionally substituted silyl group in a molecule thereof, a substituent of the substituted silyl group being at least one member selected from the group consisting of an alkyl group, an alkoxy group, a hydroxy group, a halogen atom and an aryl group having 6 or more carbon atoms, wherein
a content of silicon atoms in resin A is 0.02 to 10.00% by mass, and
a content of silicon atoms in the organosilicon polymer is 30 to 50% by mass.
2. The toner according to claim 1 , wherein resin A has a structure represented by formula (1)
where P 1 represents a polymer segment, L 1 represents a single bond or a divalent linking group, and R 1 to R 3 independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group having 6 or more carbon atoms or a hydroxy group, m represents a positive integer, with the proviso that when m is 2 or more, a plurality of L 1 , a plurality of R 1 , a plurality of R 2 and a plurality of R 3 may be the same or different.
3. The toner according to claim 2 , wherein at least one of R 1 to R 3 represents said alkoxy or hydroxy group.
4. The toner according to claim 2 , wherein R 1 to R 3 each independently represent said alkoxy or hydroxy group.
5. The toner according to claim 2 , wherein P 1 represents a polyester segment or a styrene acrylic segment.
6. The toner according to claim 2 , wherein P 1 represents a polyester segment.
7. The toner according to claim 1 , wherein resin A has a weight average molecular weight of 3,000 to 100,000.
8. The toner according to claim 1 , where a proportion of a peak area of the structure represented by formula (A) to a total peak area of the organosilicon polymer is 30 to 100% in 29 Si-NMR measurement of a tetrahydrofuran-insoluble matter of the toner particle.
9. The toner according to claim 8 , wherein the proportion of the peak area of the structure represented by formula (A) to the total peak area of the organosilicon polymer is 50 to 90%.
10. The toner according to claim 1 , wherein R 4 represents an alkyl group having from 1 to 3 carbon atoms.