Toner

Patent metadata

Field	Value
Publication number	US-9632441-B2
Application number	US-201414509257-A
Country	US
Kind code	B2
Filing date	Oct 8, 2014
Priority date	Oct 9, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

The present invention is a toner that has toner particles that have a surface layer that contains an organosilicon polymer, wherein this organosilicon polymer has a specific substructure and the ratio [ST3], in a 29 Si-NMR measurement of a tetrahydrofuran-insoluble matter of the toner particles, of the peak area for this substructure to the total peak area for the organosilicon polymer satisfies the relationship ST3≧0.40.

First claim

What is claimed is:

1. A toner comprising toner particles, each of which has a surface layer that contains an organosilicon polymer, the organosilicon polymer having a substructure represented by formula (T3)
R—Si(O 1/2 ) 3   (T3)

where R represents an alkyl group having 1 to 6 carbons or a phenyl group, wherein
a ratio ST3 of the peak area for the substructure represented by formula (T3) to the total peak area for the organosilicon polymer in a 29 Si-NMR measurement of a tetrahydrofuran-insoluble matter in the toner particles satisfies the relationship ST3≧0.40, and
a silicon atom concentration dSi with reference to a total concentration (dC+dO+dSi) of the silicon atom concentration dSi, an oxygen atom concentration dO, and a carbon atom concentration dC in electron spectroscopy for chemical analysis of a surface of the toner particles is 2.5 atom % or more.

2. The toner according to claim 1 , wherein ST3/SX2≧1.00 when SX2 is a ratio of the peak area for the structure in which the number of silicon-bonded O 1/2 is 2.0 to the total peak area for the organosilicon polymer in a 29 Si-NMR measurement of the tetrahydrofuran-insoluble matter in the toner particles.

3. The toner according to claim 1 , wherein the organosilicon polymer is obtained by polymerization of an organosilicon compound having a structure represented by formula (Z)

where R 1 represents an alkyl group having 1 to 6 carbons or a phenyl group, and R 2 , R 3 , and R 4 each independently represent a halogen atom, hydroxy group, acetoxy group, or alkoxy group.

4. The toner according to claim 3 , wherein R 1 is a methyl group, ethyl group, propyl group, or phenyl group.

5. The toner according to claim 3 , wherein R 1 is an alkyl group having 1 to 3 carbons.

6. The toner according to claim 5 , wherein the alkyl group is a methyl group, ethyl group, or propyl group.

7. The toner according to claim 3 , wherein R 2 , R 3 , and R 4 are each independently an alkoxy group.

8. The toner according to claim 1 , wherein the silicon atom concentration dSi with reference to the total concentration (dC+dO+dSi) is 5.0 atomic % or more.

9. The toner according to claim 1 , wherein the silicon atom concentration dSi with reference to the total concentration (dC+dO+dSi) is 10.0 atomic % or more.

10. The toner according to claim 3 , wherein R 1 is a methyl group.

Assignees

• Canon Kk

Inventors

• Abe Koji
• Terui Yuhei
• Katsura Taiji
• Nonaka Katsuyuki

Classifications

• G03G9/09328 Primary

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

• G03G9/08773

  Polymers having silicon in the main chain, with or without sulfur, oxygen, nitrogen or carbon only · CPC title

• G03G9/0825 Primary

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

• G03G9/09716

  treated with organic compounds · CPC title