# US 2019/0169453 A1 · Ink jet ink composition and image forming method

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- Number: US 2019/0169453 A1
- Document ID: US20190169453A1
- Status: Published application
- Kind: A1
- Application number: 16/270,555
- Filed: 2019-02-07
- Published: 2019-06-06
- Earliest claimed: 2016-08-31
- Assignees: FUJIFILM Corporation
- Applicants: Fujifilm Corporation
- Inventors: Noriaki SATO; Ichiro KOYAMA; Shota SUZUKI
- Web page: https://patentgrep.com/patent/US20190169453A1

## CPC

- C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes
- C08G 18/0823: {containing carboxylate salt groups or groups forming them}
- C08G 18/0866: {the dispersing or dispersed phase being an aqueous medium}
- C08G 18/3212: {containing cycloaliphatic groups}
- C08G 18/3215: {containing aromatic groups or benzoquinone groups}
- C08G 18/3234: {cycloaliphatic}
- C08G 18/348: {Hydroxycarboxylic acids}
- C08G 18/381: {having bromine atoms}
- C08G 18/3848: {containing two nitrogen atoms in the ring}
- C08G 18/3872: {the sulfur atom belonging to a sulfoxide or sulfone group}
- C08G 18/675: {Low-molecular-weight compounds}
- C08G 18/755: {and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate}
- C08G 18/757: {containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group}
- C08G 18/758: {containing two or more cycloaliphatic rings}
- C08G 18/7642: {containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring}
- C09D 11/023: Emulsion inks
- C09D 11/101: Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
- C09D 11/322: Pigment inks
- B41M 7/0072: {using mechanical wave energy, e.g. ultrasonics; using magnetic or electric fields, e.g. electric discharge, plasma}
- B41M 7/009: {using thermal means, e.g. infrared radiation, heat}
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)

## Abstract

There are provided an ink jet ink composition including water; and particles including a chain polymer including Unit (1), Unit (2), and a hydrophilic group and a polymerizable group, and an image forming method. Cy1 and Cy2 each independently represent a divalent organic group having 3 to 30 carbon atoms including a ring, Y1 and Y2 each independently represent an oxygen atom, a sulfur atom, or a —NR1— group, R1 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, *1 in Unit (1) represents a bonding position to a structural unit other than Unit (1), and *2 in Unit (2) represents a bonding position to a structural unit other than Unit (2).

## Claims

### Claim 1

An ink jet ink composition comprising:
water; and
particles including a chain polymer including Structural Unit (1), Structural Unit (2), and a hydrophilic group and a polymerizable group,
in Structural Units (1) and (2), Cy1 and Cy2 each independently represent a divalent organic group having 3 to 30 carbon atoms including a cyclic structure, Y1 and Y2 each independently represent an oxygen atom, a sulfur atom, or a —NR1— group, R1 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms,
*1 in Structural Unit (1) represents a bonding position to a structural unit other than Structural Unit (1), and *2 in Structural Unit (2) represents a bonding position to a structural unit other than Structural Unit (2).

### Claim 2 (depends on 1)

The ink jet ink composition according to claim 1,
wherein a total content of Structural Units (1) and (2) is 60 mass % or greater with respect to a total amount of the chain polymer.

### Claim 3 (depends on 1)

The ink jet ink composition according to claim 1,
wherein, in a case where a total millimolar number of the cyclic structure included in Structural Units (1) and (2) in 1 g of the chain polymer is defined as a ring value of the chain polymer, the ring value of the chain polymer is 3.00 mmol/g or greater.

### Claim 4 (depends on 1)

The ink jet ink composition according to claim 1,
wherein at least one of Cy1 or Cy2 includes an aliphatic ring as the cyclic structure.

### Claim 5 (depends on 1)

The ink jet ink composition according to claim 1,
wherein at least one of Cy1 or Cy2 includes two or more cyclic structures.

### Claim 6 (depends on 1)

The ink jet ink composition according to claim 1,
wherein at least one of Cy1 or Cy2 includes Bisaryl Structure (A),
*-Ar1-L-Ar2-* (A)
in Bisaryl Structure (A), Ar1 and Ar2 each independently represent an arylene group, L represents a single bond or a divalent linking group, and two *'s each represent a bonding position.

### Claim 7 (depends on 6)

The ink jet ink composition according to claim 6,
wherein at least one of Ar1 or Ar2 is an arylene group substituted with at least one halogen atom.

### Claim 8 (depends on 6)

The ink jet ink composition according to claim 6,
wherein any one of Cy1 and Cy2 includes an aliphatic ring, and the other of Cy1 and Cy2 includes Bisaryl Structure (A).

### Claim 9 (depends on 8)

The ink jet ink composition according to claim 8,
wherein, in the chain polymer, a molar ratio of the structural unit including Bisaryl Structure (A) to the structural unit including an aliphatic ring is 0.10 to 1.00.

### Claim 10 (depends on 1)

The ink jet ink composition according to claim 1,
wherein the hydrophilic group is at least one selected from the group consisting of a carboxy group and a salt of a carboxy group.

### Claim 11 (depends on 10)

The ink jet ink composition according to claim 10,
wherein, in a case where a total millimolar number of the carboxy group and the salt of a carboxy group in 1 g of the chain polymer is defined as an acid value of the chain polymer, the acid value of the chain polymer is 0.30 mmol/g to 1.50 mmol/g.

### Claim 12 (depends on 1)

The ink jet ink composition according to claim 1,
wherein a weight-average molecular weight of the chain polymer is 10,000 to 100,000.

### Claim 13 (depends on 1)

The ink jet ink composition according to claim 1,
wherein the polymerizable group of the particles is a photopolymerizable group, and
wherein the particles include a photopolymerizable compound as a compound having the photopolymerizable group.

### Claim 14 (depends on 13)

The ink jet ink composition according to claim 13,
wherein at least one kind of the photopolymerizable compound includes one or more cyclic structures and two or more (meth)acryloyl groups in a molecule.

### Claim 15 (depends on 13)

The ink jet ink composition according to claim 13,
wherein the chain polymer has a photopolymerizable group.

### Claim 16 (depends on 1)

The ink jet ink composition according to claim 1,
wherein the particles include an ethylenic double bond, and
wherein, in a case where a millimolar number of the ethylenic double bond in 1 g of a solid content of the particles is defined as the C═C value of the particles, a C═C value of the particles is 0.30 mmol/g or greater.

### Claim 17 (depends on 1)

The ink jet ink composition according to claim 1,
wherein the polymerizable group of the particles is a thermopolymerizable group, and
wherein the particles include a thermopolymerizable compound as a compound including the thermopolymerizable group.

### Claim 18 (depends on 1)

The ink jet ink composition according to claim 1,
wherein a solid content amount of the particles is 50 mass % or greater with respect to a solid content amount of the ink jet ink composition.

### Claim 19 (depends on 1)

The ink jet ink composition according to claim 1,
wherein a content of the chain polymer is 20 mass % or greater with respect to a solid content amount of the particles.

### Claim 20 (depends on 1)

An image forming method comprising:
applying the ink jet ink composition according to claim 1 to a plastic base material by an ink jet method; and
curing the ink jet ink composition applied to the plastic base material.