An ink-jet ink composition comprising: a pigment, a polymer pigment dispersion, polymer particles, a hydrophilic organic solvent, water, and at least one of a water-soluble acidic compound having a molecular weight of 200 or less or a salt thereof in an amount of from 50 ppm to 1,000 ppm; an ink set that includes the ink-jet ink composition and a treatment liquid that forms an aggregate when contacted with the ink-jet ink composition; and an image forming method using the ink set.

Claims

13 · 1 independent · depth 3

13 granted claims

›1.independentAn ink-jet ink composition comprising: a pigment, a polymer pigment dispersant, polymer particles, a hydrophilic organic solvent, water, and at least …+12

›2.↳ 1The ink jet ink composition according to claim 1, wherein the water-soluble acidic compound is a compound having a carboxy group.d2

›3.↳ 1The ink-jet ink composition according to claim 1, wherein the polymer particles are self-dispersing polymer particles.d2

›4.↳ 1The ink jet ink composition according to claim 1, wherein the polymer particles have a carboxy group.d2

›5.↳ 1The ink-jet ink composition according to claim 1, wherein the glass transition temperature of the polymer particles is from 40° C. to 180° C.d2

›6.↳ 1The ink-jet ink composition according to claim 1, wherein the polymer pigment dispersant contains a carboxy group.d2

›7.↳ 1The ink-jet ink composition according to claim 1, wherein the hydrophilic organic solvent is an (alkyleneoxy)alcohol or an (alkyleneoxy)alkyl ether.d2

›8.↳ 1An ink set comprising: the ink jet ink composition according to claim 1 and a treatment liquid that forms an aggregate when contacted with the ink-jet…d2+1

›10.↳ 1An image forming method comprising: applying, onto a recording medium, a treatment liquid that forms an aggregate when contacted with the ink jet ink …d2

›11.↳ 1The ink-jet ink composition according to claim 1, wherein the at least one of a water-soluble acidic compound having a molecular weight of 200 or less…d2

›12.↳ 1The ink-jet ink composition according to claim 1, wherein the at least one of a water-soluble acidic compound having a molecular weight of 200 or less…d2

›13.↳ 1The ink-jet composition according to claim 1, wherein the at least one of a water-soluble acidic compound having a molecular weight of 200 or less or …d2

Classifications

6 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C08K5/09
C09D11/10

USPC · US Patent Classification

523/160524/284524/157427/466

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3.1 y

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non-final + final

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no RCE

Examiner

Vu A Nguyen

art unit 1762 · TC 1700

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›Priority documents — 1

Type	Document	Date
related publication	US 20100227065 A1	9 Sep 2010

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