# US 2019/0168182 A1 · Aqueous dispersion, method for manufacturing the same, and image forming method

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- Number: US 2019/0168182 A1
- Document ID: US20190168182A1
- Status: Published application
- Kind: A1
- Application number: 16/270,558
- Filed: 2019-02-07
- Published: 2019-06-06
- Earliest claimed: 2016-09-06
- Assignees: FUJIFILM Corporation
- Applicants: Fujifilm Corporation
- Inventors: Noriaki SATO; Ichiro KOYAMA; Shota SUZUKI
- Web page: https://patentgrep.com/patent/US20190168182A1

## CPC

- B01J 13/18: In situ polymerisation with all reactants being present in the same phase
- B01J 13/14: Polymerisation; cross-linking
- B41J 2/01: Ink jet
- C08F 2/44: Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
- C08G 18/0823: {containing carboxylate salt groups or groups forming them}
- C08G 18/227: {of antimony, bismuth or arsenic}
- C08G 18/282: {Alkanols, cycloalkanols or arylalkanols including terpenealcohols}
- C08G 18/3206: {aliphatic}
- C08G 18/3212: {containing cycloaliphatic groups}
- C08G 18/3215: {containing aromatic groups or benzoquinone groups}
- C08G 18/348: {Hydroxycarboxylic acids}
- C08G 18/381: {having bromine atoms}
- C08G 18/3872: {the sulfur atom belonging to a sulfoxide or sulfone group}
- C08G 18/42: Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G 18/4277: {Caprolactone and/or substituted caprolactone}
- C08G 18/44: Polycarbonates
- C08G 18/5024: {containing primary and/or secondary amino groups}
- C08G 18/6659: {with compounds of group C08G18/34}
- C08G 18/6692: {with compounds of group C08G18/34}
- C08G 18/6755: {Unsaturated carboxylic acids}
- C08G 18/73: acyclic
- 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 18/8025: {Masked aliphatic or cycloaliphatic polyisocyanates}
- C08G 18/8029: {Masked aromatic polyisocyanates}
- C08J 3/03: in aqueous media
- 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 11/102: containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C09D 11/30: Inkjet printing inks
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- 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)

## Abstract

Provided are an aqueous dispersion, a method for manufacturing the aqueous dispersion, and an image forming method in which the image is formed of the aqueous dispersion, the aqueous dispersion including a microcapsule that has a shell having a three-dimensional cross-linked structure containing a urethane bond and/or urea bond, and has a core, in which the shell and/or core has a polymerizable group; a dispersant in which a urethane bond and/or urea bond and an anionic group are contained, a weight-average molecular weight is 5000 or more, and an anionic group value, which is the number of millimoles of the anionic group contained in 1 g of the dispersant, is from 0.10 to 2.50 mmol/g; and water.

## Claims

### Claim 1

An aqueous dispersion comprising:
a microcapsule that includes a shell having a three-dimensional cross-linked structure containing at least one bond selected from a urethane bond or a urea bond, and includes a core, in which at least one of the shell or the core has a polymerizable group;
a dispersant in which at least one bond selected from a urethane bond or a urea bond, and an anionic group are contained, a weight-average molecular weight is 5000 or more, and an anionic group value, which is the number of millimoles of the anionic group contained in 1 g of the dispersant, is from 0.10 mmol/g to 2.50 mmol/g; and
water.

### Claim 2 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the dispersant contains Structural Unit (C),
in Structural Unit (C), RC1 represents a divalent organic group, and in a case of assuming a compound HRC1H in which a hydrogen atom is bonded to each of two binding positions of the divalent organic group, RC1 represents the divalent organic group which allows C log P of the compound HRC1H to be 1.00 or more, YC1 represents O, S, NH, or NZC1, YC2 represents O, S, NH, or NZC2; ZC1 and ZC2 each independently represent a hydrocarbon group having 1 to 10 carbon atoms, and two *3's each represent a binding position with a structural unit other than Structural Unit (C).

### Claim 3 (depends on 2)

The aqueous dispersion according to claim 2,
wherein the dispersant further contains Structural Unit (A) and Structural Unit (B),
in Structural Unit (A), RA1 represents a divalent hydrocarbon group having 1 to 20 carbon atoms, and two *1's each represent a binding position with a structural unit other than Structural Unit (A), and
in Structural Unit (B), X1 represents a (pX+2)-valent organic group, pX represents an integer of 1 or more, YB1 represents O, S, NH, or NZB1, YB2 represents O, S, NH, or NZB2, ZB1 and ZB2 each independently represent a hydrocarbon group having 1 to 10 carbon atoms, LB1 represents a single bond or a divalent linking group, and two *2's each represent a binding position with a structural unit other than Structural Unit (B), and
a carboxy group in Structural Unit (B) may be neutralized.

### Claim 4 (depends on 3)

The aqueous dispersion according to claim 3,
wherein the divalent hydrocarbon group represented by RA1 in Structural Unit (A) contains a cyclic structure.

### Claim 5 (depends on 2)

The aqueous dispersion according to claim 2,
wherein C log P of the compound HRC1H is 3.00 or more.

### Claim 6 (depends on 2)

The aqueous dispersion according to claim 2,
wherein RC1 in Structural Unit (C) is a divalent polyalkyleneoxy group in which two hydroxy groups are removed from polyalkylene glycol, a divalent polycarbonate group in which two hydroxy groups are removed from polycarbonate diol, a divalent polyester group in which two hydroxy groups are removed from polyester diol, a divalent organic group in which two hydroxy groups are removed from a diol compound having 2 to 50 carbon atoms other than polyalkylene glycol, polycarbonate diol, and polyester diol, or a divalent organic group in which two amino groups are removed from a diamine compound having 2 to 50 carbon atoms.

### Claim 7 (depends on 2)

The aqueous dispersion according to claim 2,
wherein the divalent organic group represented by RC1 in Structural Unit (C) contains a cyclic structure.

### Claim 8 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the weight-average molecular weight of the dispersant is from 10000 to 100000.

### Claim 9 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the anionic group value of the dispersant is from 0.30 mmol/g to 1.50 mmol/g.

### Claim 10 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the shell contains a cyclic structure.

### Claim 11 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the polymerizable group is a radically polymerizable group, and
the core contains a radically polymerizable compound as a compound having the radically polymerizable group.

### Claim 12 (depends on 11)

The aqueous dispersion according to claim 11,
wherein the core contains a di- or lower functional radically polymerizable compound and a tri- or higher functional radically polymerizable compound as compounds having the radically polymerizable group.

### Claim 13 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the core contains a photopolymerization initiator.

### Claim 14 (depends on 1)

The aqueous dispersion according to claim 1,
wherein the polymerizable group is a thermally polymerizable group, and
the core contains a thermally polymerizable compound as a compound having the thermally polymerizable group.

### Claim 15 (depends on 1)

The aqueous dispersion according to claim 1,
wherein a total amount of a total solid content of the microcapsule and the dispersant is 50% by mass or more with respect to a total solid content of the aqueous dispersion.

### Claim 16 (depends on 1)

The aqueous dispersion according to claim 1, which is used as an ink jet ink.

### Claim 17 (depends on 1)

A method for manufacturing the aqueous dispersion according to claim 1, the method comprising:
mixing an oil-phase component containing an organic solvent, the dispersant, a tri- or higher functional isocyanate compound, and at least one of an isocyanate compound into which a polymerizable group is introduced or a polymerizable compound, with a water-phase component containing water, and emulsifying the obtained mixture so as to form the microcapsule.

### Claim 18 (depends on 1)

An image forming method comprising:
applying the aqueous dispersion according to claim 1 onto a recording medium; and
curing the aqueous dispersion applied onto the recording medium.