Toner particle having hydrotalcite particle containing fluorine

Patent metadata

Field	Value
Publication number	US-12535751-B2
Application number	US-202318173278-A
Country	US
Kind code	B2
Filing date	Feb 23, 2023
Priority date	Feb 28, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A toner comprising a toner particle comprising a binder resin, and a strontium titanate particle and a hydrotalcite particle on a surface of the toner particle, wherein the hydrotalcite particle comprises fluorine, the fluorine is present inside the hydrotalcite particle in line analysis of STEM-EDS mapping analysis of the toner, and when an area ratio of the strontium titanate particle to the toner particle in an EDS measurement field, which is measured through the STEM-EDS mapping analysis of the toner, is defined as T1 (%) and an area ratio of the hydrotalcite particle to the toner particle in the EDS measurement field, which is measured through the STEM-EDS mapping analysis of the toner, is defined as H1 (%),
T1/H1 is 0.15 to 9.00.

First claim

What is claimed is:

1 . A toner, comprising:
a toner particle comprising a binder resin; a strontium titanate particle on a surface of the toner particle; and a hydrotalcite particle on a surface of the toner particle, the hydrotalcite particle comprising fluorine, the fluorine being present inside the hydrotalcite particle in line analysis of STEM-EDS mapping analysis of the toner, wherein (T1/H1) is 0.15 to 9.00 and (T2/H2) is 0.50 to 145.00 when T1(%) is an area ratio of the strontium titanate particle to the toner particle in an EDS measurement field measured through the STEM-EDS mapping analysis, H1(%) is an area ratio of the hydrotalcite particle to the toner particle in the EDS measurement field, H2=((an atomic concentration of the fluorine in the hydrotalcite particle obtained from main component mapping of the hydrotalcite particle through the STEM-EDS mapping analysis of the toner)×H1×100) and T2=((an atomic concentration of strontium in the strontium titanate particle, obtained from main component mapping of the strontium titanate particle through the STEM-EDS mapping analysis of the toner)×T1×100).

2 . The toner according to claim 1 , wherein the hydrotalcite particle comprises aluminum.

3 . The toner according to claim 2 , wherein a ratio of an atomic concentration of fluorine to aluminum comprising the hydrotalcite particle obtained from main component mapping of the hydrotalcite particle through the STEM-EDS mapping analysis of the toner is 0.01 to 0.70.

4 . The toner according to claim 1 , wherein a number average particle diameter T3 (nm) of primary particle of the strontium titanate particle is 20 to 750 nm.

5 . The toner according to claim 1 , wherein a number average particle diameter H3 (nm) of primary particle of the hydrotalcite particle is 40 to 1100 nm.

6 . The toner according to claim 1 , wherein H3/T3 is 0.40 to 18.00 when T3 (nm) is a number average particle diameter of primary particle of the strontium titanate particle, and H3 (nm) is a number average particle diameter of primary particle of the hydrotalcite particle.

7 . The toner according to claim 1 , wherein H3/T4 is 0.20 to 8.00 when H3 (nm) is a number average particle diameter of primary particle of the hydrotalcite particle and T4 (nm) is a modal diameter in a weight-based particle size distribution of the strontium titanate particle adhering to the surface of the toner particle.

8 . The toner according to claim 1 , wherein T2/H2 is 4.00 to 76.00.

Assignees

• Canon Kk

Inventors

• Tsuda Shohei
• Kamikura Kenta
• Fukudome Kosuke
• Komiya Yuta
• Arimura Satoshi
• Ishii Toru

Classifications

• G03G9/0819 Primary

  characterised by the dimensions of the particles · CPC title

• G03G9/09708 Primary

  Inorganic compounds · CPC title

• G03G9/0975

  anionic · CPC title

• G03G9/09716

  treated with organic compounds · CPC title

• G03G9/09766

  comprising fluorine · CPC title