# US 2018/0321607 A1 · Curable liquid developer

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- Number: US 2018/0321607 A1
- Document ID: US20180321607A1
- Status: Published application
- Kind: A1
- Application number: 15/963,151
- Filed: 2018-04-26
- Published: 2018-11-08
- Earliest claimed: 2017-05-02
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Akifumi Matsubara; Yuzo Tokunaga; Naohiko Tsuchida; Yasutaka Akashi
- Web page: https://patentgrep.com/patent/US20180321607A1

## CPC

- G03G 9/135: characterised by stabiliser or charge-controlling agents
- G03G 9/125: characterised by the liquid
- G03G 9/131: {obtained by reactions only involving carbon-to-carbon unsaturated bonds}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A curable liquid developer containing a radical-polymerizable liquid monomer, a photopolymerization initiator, a toner particle being insoluble in the radical-polymerizable liquid monomer, and an amine compound, wherein the amine compound contains an amino group and at least one group selected from the group consisting of an alkyl group having at least 6 carbon atoms, a cycloalkyl group having at least 6 carbon atoms, an alkylene group having at least 6 carbon atoms and a cycloalkylene group having at least 6 carbon atoms, and an amine value of the amine compound is at least 2 mg KOH/g and not more than 200 mg KOH/g.

## Claims

### Claim 1

A curable liquid developer comprising
a radical-polymerizable liquid monomer,
a photopolymerization initiator,
a toner particle being insoluble in the radical-polymerizable liquid monomer, and
an amine compound,
wherein
the amine compound contains an amino group and at least one group selected from the group consisting of an alkyl group having at least 6 carbon atoms, a cycloalkyl group having at least 6 carbon atoms, an alkylene group having at least 6 carbon atoms and a cycloalkylene group having at least 6 carbon atoms, and
an amine value of the amine compound is at least 2 mg KOH/g and not more than 200 mg KOH/g.

### Claim 2 (depends on 1)

The curable liquid developer according to claim 1, wherein the radical-polymerizable liquid monomer has an acrylic group or a methacrylic group.

### Claim 3 (depends on 1)

The curable liquid developer according to claim 1, wherein
the amine compound is a polymer containing a monomer unit having an amino group and a monomer unit having at least one group selected from the group consisting of an alkyl group having at least 6 carbon atoms, a cycloalkyl group having at least 6 carbon atoms, an alkylene group having at least 6 carbon atoms and a cycloalkylene group having at least 6 carbon atoms.

### Claim 4 (depends on 3)

The curable liquid developer according to claim 3, wherein
when a mass number of the monomer unit having an amino group is denoted by X and
a mass number of the monomer unit having at least one group selected from the group consisting of an alkyl group having at least 6 carbon atoms, a cycloalkyl group having at least 6 carbon atoms, an alkylene group having at least 6 carbon atoms and a cycloalkylene group having at least 6 carbon atoms is denoted by Y,
a X:Y mass ratio is 0.5:99.5 to 70:30.

### Claim 5 (depends on 1)

The curable liquid developer according to claim 1, wherein
a content of the photopolymerization initiator is at least 0.05 parts by mass and not more than 2.00 parts by mass relative to 100 parts by mass of the radical-polymerizable liquid monomer.

### Claim 6 (depends on 1)

The curable liquid developer according to claim 1, wherein
a content of the amine compound is at least 0.010 parts by mass and not more than 1.000 parts by mass relative to 100 parts by mass of the radical-polymerizable liquid monomer.

### Claim 7 (depends on 1)

The curable liquid developer according to claim 1, wherein
the amine compound contains an amino group and an alkyl group having at least 6 carbon atoms.