IP Library Granted Patent US 9,658,551
Granted Patent B2
US 9,658,551 · App. 14/509,250 · Granted May 23, 2017

Toner

Inventors: Yuhei Terui (Numazu, JP); Katsuyuki Nonaka (Mishima, JP); Koji Abe (Numazu, JP); Harumi Takada (Susono, JP)
Assignee: CANON KABUSHIKI KAISHA
G03G9/08791G03G9/0825G03G9/08708G03G9/08755G03G9/09321
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Quick Facts
Patent No.
US 9,658,551
App. No.
14/509,250
Granted
May 23, 2017
Kind
B2
Abstract

The present invention provides a toner having a toner particle that contains a binder resin, wherein the binder resin contains a vinylic resin and a polyester resin, the vinylic resin contains an organic silicon polymer having a specific structure, the organic silicon polymer is contained in the surface layer of the toner particle, the proportion of a silicon atom in the organic silicon polymer having a specific structure is at least 5%, the polyester resin is a specific polymer, and the toner particle contains a specific amount of the polyester resin.

Claims (26)

1. A toner comprising:

a toner particle that contains a binder resin,

wherein

the binder resin contains a vinylic resin and a polyester resin,

the vinylic resin contains an organic silicon polymer having a partial structure represented by the following formula (1) or the following formula (2):

(wherein, A and B respectively and independently represent a partial structure represented by the following formula (3) or the following formula (4), and in formula (2), L represents a methylene group, ethylene group or phenylene group),

(wherein, R 1 represents a hydrogen atom or alkyl group having from 1 to 22 carbon atoms and R 2 represents a hydrogen atom or methyl group),

a surface layer of the toner particle contains the organic silicon polymer,

a proportion of a silicon atom in the organic silicon polymer having a structure represented by the —SiO 3/2 relative to a silicon atom in the organic silicon polymer contained in the toner particle is at least 5%,

the polyester resin contains at least one polymer selected from the group consisting of polymers indicated in the following (i), (ii) and (iii):

(i) a polymer obtained by condensation polymerization of an alcohol component containing at least 50.0 mol % of an aliphatic diol having from 2 to 16 carbon atoms, and a carboxylic acid component containing at least 50.0 mol % of an aliphatic dicarboxylic acid having from 2 to 16 carbon atoms,

(ii) a polymer obtained by condensation polymerization of an alcohol component containing at least 50.0 mol % of an aliphatic diol having from 2 to 16 carbon atoms, and a carboxylic acid component containing at least 50.0 mol % of an aromatic dicarboxylic acid having from 8 to 18 carbon atoms, and

(iii) a polymer obtained by condensation polymerization of an alcohol component containing at least 50 mol % of an aromatic diol and a carboxylic acid component containing at least 50.0 mol % of an aliphatic dicarboxylic acid having from 2 to 16 carbon atoms, and

the toner particle contains from at least 3.0% by mass to not more than 70.0% by mass of the polyester resin based on the binder resin contained in the toner particle.

2. The toner according to claim 1 , wherein the polyester resin is a polyester resin having a melting point.

3. The toner according to claim 2 , wherein the melting point of the polyester resin is from at least 40.0° C. to not more than 90.0° C.

4. The toner according to claim 1 , wherein the polyester resin is a styrene-denatured polyester resin that has been denatured with styrene.

5. The toner according to claim 1 , wherein a ratio of the density of a silicon atom dSi to the total density of the density of a carbon atom dC, the density of a hydrogen atom dH, the density of a silicon atom dSi and the density of a sulfur atom dS in a surface of the toner particle is at least 0.5 atom %.

6. The toner according to claim 1 , wherein an average thickness Dav. of a surface layer of the toner particle that has the organic silicon polymer is from at least 5.0 nm to not more than 150.0 nm.

7. The toner according to claim 1 , wherein a proportion of a portion where a thickness of a surface layer of the toner particle that has the organic silicon polymer is not more than 5.0 nm is not more than 20.0%.

8. The toner according to claim 1 , wherein the organic silicon polymer is a polymer obtained by polymerizing an organic silicon compound having a structure represented by the following formula (5) or a structure represented by the following formula (6):

(wherein, R 3 , R 4 and R 5 respectively and independently represent a halogen atom, hydroxyl group or alkoxy group, and in formula (6), L represents a methylene group, ethylene group or phenylene group).

9. The toner according to claim 8 , wherein the alkoxy group is a methoxy group or an ethoxy group.

10. The toner according to claim 1 , wherein the toner particle is produced by:

forming, in an aqueous medium, a particle of a polymerizable monomer composition: containing an organic silicon compound for forming the organic silicon polymer, a polymerizable monomer for forming the binder resin, and the polyester resin; and

polymerizing the organic silicon compound and the polymerizable monomer.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 11, 2015
From: TERUI, YUHEI; NONAKA, KATSUYUKI; ABE, KOJI; TAKADA, HARUMI
To: CANON KABUSHIKI KAISHA
Reel/Frame 035611/0752 →
Priority Claims (1)
JP 2013-212261 · Oct 9, 2013 · national
Continuity (1)
Related Publication 20150099222A1 · Apr 9, 2015