Toner

Patent metadata

Field	Value
Publication number	US-2025093791-A1
Application number	US-202418885366-A
Country	US
Kind code	A1
Filing date	Sep 13, 2024
Priority date	Sep 19, 2023
Publication date	Mar 20, 2025
Grant date	—

Abstract

A toner comprising a toner particle comprising a binder resin, wherein the toner particle comprises a toner base particle and a silicon polymer composite present at a surface of the toner base particle, the silicon polymer composite comprises a silicon polymer and a specific metal atom, and when, in X-ray photoelectron spectroscopy on the toner, a ratio of the number of the specific metal atom is defined as ME and a ratio of the number of the silicon atom is defined as SiE, and when, in an EDS mapping image of constituent elements in a cross section of the toner, a ratio of the number of the specific metal atom to a sum of the number of the silicon atom and the specific metal atom in a region outside a contour of the toner base particle is defined as MX, ME, SiE, and MX satisfy a specific relationship.

First claim

What is claimed is:

1 . A toner comprising a toner particle comprising a binder resin,
wherein the toner particle comprises a toner base particle and a silicon polymer composite present at a surface of the toner base particle, the silicon polymer composite comprises
a silicon polymer and
at least one specific metal atom selected from the group consisting of metal atoms included in Groups 3 to 13, and
when, a ratio of the number of the specific metal atom to a sum of the numbers of a carbon atom, an oxygen atom, a silicon atom, a phosphorus atom, and the specific metal atom obtained by X-ray photoelectron spectroscopy on the toner is defined as ME, and a ratio of the number of the silicon atom to a sum of the numbers of a carbon atom, an oxygen atom, a silicon atom, a phosphorus atom, and the specific metal atom obtained by X-ray photoelectron spectroscopy on the toner is defined as SiE, and in an EDS mapping image of constituent elements in a cross section of the toner obtained by analyzing with use of energy dispersive X-ray spectroscopy, the cross section of the toner observed with a transmission electron microscope, a ratio of the number of the specific metal atom to a sum of the numbers of a silicon atom and the specific metal atom in a region outside a contour of the toner base particle is defined as MX, the ME, the SiE, and the MX satisfy Formulae (1) and (2) below:

0.5
≤

(

ME
/

Si
⁢
E

)

/
MX

≤
2.5

;
and

(
1
)

5.
×

10

-
3

≤
MX
≤

6.
×

10

-
2

.

(
2
)

2 . The toner according to claim 1 , wherein the MX satisfies Formula (3) below:

1.
×

10

-
2

≤
MX
≤

6.
×

10

-
2

.

(
3
)

3 . The toner according to claim 1 , wherein the silicon polymer composite fixes on the surface of the toner base particle in a protrusion shape.

4 . The toner according to claim 3 , wherein
an image of the toner base particle and an image of the silicon polymer composite are observed in the EDS mapping image and the image of the silicon polymer composite is observed at a position corresponding to the surface of the toner base particle in the image of the toner base particle, and when line scanning is performed in the EDS mapping image on a region X specified by a following method, a maximum value of a strength count of the specific metal atom is defined as Mmax, and an average value of the strength counts is defined as Mave, the Mmax and the Mave satisfy formula (4) below:

1.
<

M
⁢
max
/
Mave

<
1.8

;

(
4
)

Method for Specifying the Region X:
(i) End points of an interface formed by the image of the silicon polymer composite and the image of the toner base particle are connected by a straight line to define a base line,
(ii) A perpendicular line L1 having a maximum length among perpendicular lines connecting the base line and an outer surface of the image of the silicon polymer composite is defined,
(iii) When a width of the image of the silicon polymer composite, which is a length of the base line, is defined as W, a line segment L2 connecting two points on an inner side of 0.1 W from respective end portions of the base line is defined on the base line,
(iv) A region in which a line segment overlaps the image of the silicon polymer composite when the line segment L2 is moved to a position of a midpoint of the perpendicular line L1 in parallel with the base line in a direction in which the perpendicular line L1 extends is defined as “region X”.

5 . The toner according to claim 1 , wherein a conductivity of the silicon polymer composite measured at a frequency of 10 kHz is 1.0×10 −5 to 1.0×10 −2 S/m.

6 . The toner according to claim 1 , wherein in the silicon polymer composite, at least parts of the specific metal atoms and at least parts of silicon atoms are bonded via an oxygen atom.

7 . The toner according to claim 1 , wherein the specific metal atom comprises at least one metal atom selected from the group consisting of titanium, zirconium, copper, and aluminum.

8 . The toner according to claim 1 , wherein the specific metal atom comprises titanium.

9 . The toner according

Assignees

• Canon Kk

Inventors

• Inoue Koki
• Shiotari Yoshiaki
• Uratani Kozue

Classifications

• G03G9/0825

  characterised by their structure; characterised by non-homogenuous distribution of components (microcapsular toners G03G9/093) · CPC title

• G03G9/09708

  Inorganic compounds · CPC title

• G03G9/09775

  containing atoms other than carbon, hydrogen or oxygen (G03G9/09741 - G03G9/09766 take precedence) · CPC title

• G03G9/09328 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• G03G9/09378 Primary

  Non-macromolecular organic compounds · CPC title