# US 2021/0278775 A1 · Toner

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- Number: US 2021/0278775 A1
- Document ID: US20210278775A1
- Status: Published application
- Kind: A1
- Application number: 17/189,794
- Filed: 2021-03-02
- Published: 2021-09-09
- Earliest claimed: 2020-03-05
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kentaro Kamae; Takeshi Hashimoto; Takeshi Ohtsu; Hayato Ida
- Web page: https://patentgrep.com/patent/US20210278775A1

## CPC

- G03G 9/08755: {Polyesters}
- G03G 9/08711: {with esters of acrylic or methacrylic acid}
- G03G 9/08782: {Waxes}
- G03G 9/08786: {Graft polymers}
- G03G 9/08797: {characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A toner comprising a toner particle that contains a binder resin and a wax, wherein the binder resin contains an amorphous polyester resin, a polymer A, and a component B, a content of the amorphous polyester resin in the binder resin is at least 50.0 mass %, the polymer A has first monomer units represented by Formula (C) below and second monomer units, RZ3 represents a hydrogen atom or a methyl group, R represents a C18 to C36 alkyl group, a content ratio of the first monomer units in the polymer A is from 5.0 mol % to 60.0 mol %, an SP value of the second monomer units is at least 21.00, a content of the polymer A in the binder resin is from 0.10 mass % to 10.00 mass %, and SP values of the amorphous polyester resin, the polymer A, the component B and the wax satisfy specific relationships.

## Claims

### Claim 1

A toner comprising a toner particle that contains a binder resin and a wax, wherein
the binder resin contains an amorphous polyester resin, a polymer A, and a component B,
a content of the amorphous polyester resin is at least 50.0 mass % with respect to a total mass of the binder resin,
the polymer A has first monomer units represented by Formula (C) below and second monomer units different from the first monomer units:
where, RZ3 represents a hydrogen atom or a methyl group, and R represents a C18 to C36 alkyl group,
a content ratio of the first monomer units in the polymer A is from 5.0 mol % to 60.0 mol % with respect to a total number of moles of all monomer units in the polymer A,
SPA21 (J/cm3)0.5, which is an SP value of the second monomer units, is at least 21.00,
a content of the polymer A is from 0.10 mass % to 10.00 mass % with respect to the total mass of the binder resin, and
with SPP (J/cm3)0.5 being an SP value of the amorphous polyester resin,
SPA (J/cm3)0.5 being an SP value of the polymer A,
SPB (J/cm3)0.5 being an SP value of the component B, and
SPW (J/cm3)0.5 being an SP value of the wax,
the SPP, the SPA, the SPB and the SPW satisfy Expressions (1) and (2) below:
0.5≤[(SPP−SPA)−(SPA−SPW)] (1)
0.5≤[(SPA−SPW)−(SPB−SPA)] (2).

### Claim 2 (depends on 1)

The toner according to claim 1, wherein the SPP (J/cm3)0.5 and the SPB (J/cm3)0.5 satisfy relationship of Expression (3) below:
1.0≤(SPP−SPB)≤3.0 (3)

### Claim 3 (depends on 1)

The toner according to claim 1, wherein the SPA (J/cm3)0.5 satisfies relationship of Expression (4) below:
18.0≤SPA≤24.0 (4)

### Claim 4 (depends on 1)

The toner according to claim 1, wherein a content ratio of the second monomer unit is from 20.0 mol % to 90.0 mol % with respect to the total number of moles of all monomer units in the polymer A.

### Claim 5 (depends on 1)

The toner according to claim 1, wherein the second monomer units are at least one selected from the group consisting of monomer units represented by Formulae (D) and (E) below:
where, X represents a single bond or a C1 to C6 alkylene group,
R1 represents
—C≡N,
—C(═O)NHR10 (where R10 is a hydrogen atom or a C1 to C4 alkyl group),
a hydroxy group,
—COOR11 (where R11 is a hydrogen atom, a C1 to C6 alkyl group, or a C1 to C6 hydroxyalkyl group),
—NH—C(═O)—N(R13)2 (where two R13 are each independently a hydrogen atom or a C1 to C6 alkyl group),
—COO(CH2)2NHCOOR14 (where R14 is a C1 to C4 alkyl group), or
—COO(CH2)2—NH—C(═O)—N(R15)2 (where two R15 are each independently a hydrogen atom or a C1 to C6 alkyl group),
R2 represents a hydrogen atom or a methyl group, and
where, R3 represents a C1 to C4 alkyl group, and R4 represents a hydrogen atom or a methyl group.

### Claim 6 (depends on 1)

The toner according to claim 1, wherein a content of the component B is from 0.10 mass % to 10.00 mass % with respect to the total mass of the binder resin.

### Claim 7 (depends on 1)

The toner according to claim 1, wherein the polymer A has third monomer units different from the first monomer units represented by the Formula (C) and the second monomer units, and
the third monomer units are monomer units represented by Formula (F) below:
where, R5 represents a hydrogen atom or a methyl group, and Ph represents a phenyl group.

### Claim 8 (depends on 1)

The toner according to claim 1, wherein the component B contains a graft polymer of a hydrocarbon compound and a styrene acrylic polymer.

### Claim 9 (depends on 1)

The toner according to claim 1, wherein the component B contains a crystalline polyester resin.