JP2015075662A5 - - Google Patents

Claims (7)

A toner having toner particles containing an organosilicon polymer,
The organosilicon polymer has a partial structure represented by the following formula (1):
The toner particles contain 0.050 or more partial structures represented by the following formula (1) per 1.0 organosilicon atom contained in the toner particles;
The toner particles comprise at least one of a (meth) acrylic acid alkyl ester polymer having a melting point and a (meth) acrylic acid alkyl ester copolymer having a melting point, of 1.0% by mass or more and 90.0% by mass or less. Contains,
A toner wherein the alkyl group constituting the alkyl ester of the (meth) acrylic acid alkyl ester is a linear alkyl group having 16 to 34 carbon atoms.

(In the formula, R1 represents a saturated hydrocarbon group or aryl group having 1 to 6 carbon atoms.)   In the measurement using the X-ray photoelectron spectroscopic analysis on the surface of the toner particle, when the total of the carbon atom concentration dC, the oxygen atom concentration dO, and the silicon atom concentration dSi on the toner particle surface is 100.0 atomic%. The toner according to claim 1, wherein the silicon atom concentration dSi is 1.0 atomic% or more.   In the cross-sectional observation of the toner particles using a transmission electron microscope (TEM), the cross section of the toner particles is centered on the intersection of the long axis L of the toner particle cross section and the axis L90 that passes through the center of the long axis L and is vertical. The toner particles containing 32 organosilicon polymers on the dividing axis are equally divided into 16 and the dividing axes from the center toward the surface of the toner particles are An (n = 1 to 32), respectively. Average thickness of the surface layer Dav. The toner according to claim 1, wherein the toner is 5.0 nm or more. In the cross-sectional observation of the toner particles using a transmission electron microscope (TEM), the cross section of the toner particles is centered on the intersection of the long axis L of the toner particle cross section and the axis L90 that passes through the center of the long axis L and is vertical. Toner particles containing an organosilicon polymer on each of the 32 divided axes when the divided axes from the center to the surface of the toner particles are defined as An (n = 1 to 32). 4. The toner according to claim 1, wherein a ratio of the number of split axes in which the thickness of the surface layer is 2.5 nm or less is 20.0% or less. 5.   The toner according to any one of claims 1 to 4, wherein R1 in the formula (1) is a methyl group or an ethyl group. The organosilicon polymer, the toner according to any one of claims 1 to 5 which is a polymer of an organosilicon compound having a structure represented by the following formula (2).

(In Formula (2), R1 represents a saturated hydrocarbon group or aryl group having 1 to 6 carbon atoms, and R2, R3, and R4 each independently represent a halogen atom, a hydroxyl group, an acetoxy group, or an alkoxy group. .)   The toner according to claim 6, wherein R 2, R 3, and R 4 in the formula (2) are alkoxy groups.