# US 9,040,216 B2 · Toner

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- Number: US 9,040,216 B2
- Document ID: US9040216B2
- Status: Granted
- Kind: B2
- Application number: 14/095,963
- Filed: 2013-12-03
- Published: 2014-06-26
- Granted: 2015-05-26
- Earliest claimed: 2012-06-22
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kosuke Fukudome; Shuhei Moribe; Satoshi Mita; Kazuo Terauchi; Yojiro Hotta; Tetsuya Ida
- Web page: https://patentgrep.com/patent/US9040216B2

## CPC

- G03G 9/08755: {Polyesters}
- C08G 63/16: Dicarboxylic acids and dihydroxy compounds
- C08G 63/19: Hydroxy compounds containing aromatic rings
- C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
- G03G 9/08795: {characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants}
- G03G 9/08797: {characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Provided is a toner satisfying low-temperature fixing performance and long-term storage stability of fixed images. Further, provided is a toner capable of obtaining toner images excellent in long-term storage stability irrespective of use environments even in the case where images are formed by a high-speed fixing system having low internal pressure of a fixing nip of a fixing device and a high printing speed. The toner includes toner particles containing a binder resin having a resin A and B, and a coloring agent, in which the resin A includes a resin including a moiety capable of forming a crystalline structure; the resin B includes a resin free of a moiety capable of forming a crystalline structure; and ΔHhigh and ΔHlow satisfy the expressions: 2≦ΔHhigh≦45 3[%]≦{(ΔHlow−ΔHhigh)/ΔHlow}×100≦70[%] where ΔHhigh and ΔHlow represent a heat of melting derived from the binder resin measured at a temperature increase speed of 100° C./min and 10° C./min, respectively.

## Claims

### Claim 1

A toner, comprising toner particles, each of which contains a binder resin containing a resin A and a resin B, and a coloring agent,
wherein:
(1) the resin A comprises a resin including a moiety capable of forming a crystalline structure;
(2) the resin A comprises an aliphatic polyester resin including a unit derived from an alcohol component and a unit derived from an acid component;
in the unit derived from an alcohol component, a ratio of a unit derived from an aliphatic diol having 6 or more and 12 or less carbon atoms is 85 mol % or more; and
in the unit derived from an acid component, a ratio of a unit derived from an aliphatic dicarboxylic acid having 6 or more and 14 or less carbon atoms is 85 mol % or more,
(3) the resin A is a resin in which a crystal nucleating agent is bonded to an end of a molecule forming a resin part,
(4) the resin B comprises a resin which is free of any moieties capable of forming a crystalline structure; and
(5) in a measurement of an endothermic quantity of the toner by the use of an input compensation type differential scanning calorimeter, ΔHhigh and ΔHlow satisfy the following relationships of Expressions 1 and 2:
2≦ΔHhigh≦45 Expression 1
3≦{(ΔHlow−ΔHhigh)/ΔHlow}×100≦70 Expression 2
where
the ΔHhigh (J/g) represents a heat of melting derived from the binder resin observed when the toner is melted by increasing its temperature temporarily to 180° C. at a temperature increase speed of 100° C./min and then solidified by being cooled to −10° C. at a temperature decrease speed of 100° C./min, and the temperature is increased again to 180° C. at a temperature increase speed of 100° C./min, and
the ΔHlow (J/g) represents a heat of melting derived from the binder resin observed when the toner is melted by increasing its temperature temporarily to 180° C. at a temperature increase speed of 10° C./min and then solidified by being cooled to −10° C. at a temperature decrease speed of 10° C./min, and the temperature is increased again to 180° C. at a temperature increase speed of 10° C./min at a temperature increase speed of 10° C./min.

### Claim 2 (depends on 1)

The toner according to claim 1, wherein a ratio between a content of the resin A and a content of the resin B in the toner is 5:95 to 40:60 in terms of mass.

### Claim 3 (depends on 1)

The toner according to claim 1, wherein Sa and Sb satisfy the following relationship of Expression 3:
−0.40≦Sb−Sa≦0.80 Expression 3
wherein the Sa ((cal/cm3)1/2) represents an SP value of the resin A, and the Sb ((cal/cm3)1/2) represents an SP value of the resin B.

### Claim 4 (depends on 3)

The toner according to claim 3, wherein the Sa is 9.00 (cal/cm3)1/2 or more and 10.50 (cal/cm3)1/2 or less.

### Claim 5 (depends on 1)

The toner according to claim 1, wherein the resin A has a melting point of 60° C. or more and 120° C. or less.

### Claim 6 (depends on 1)

The toner according to claim 1, wherein the resin B comprises a polyester resin.

### Claim 7 (depends on 1)

The toner according to claim 1, wherein C1 and C2 satisfy the following Expression 5:
−2≦C1−C2≦2 Expression 5
where the C1 represents a carbon number of the unit derived from the aliphatic diol of the resin A, and the C2 represents a carbon number of the unit derived from the aliphatic dicarboxylic acid of the resin A.