[Problem to be solved] A non-aqueous ink, which has excellent pigment dispersion stability and can achieve reduction or elimination of print-through, thereby achieving high print density, is disclosed. [Solution] The non-aqueous ink contains at least a pigment and an organic solvent, wherein the organic solvent contains a five-membered heterocyclic compound having a Câ• O bond in an amount of 50 mass % or more of the organic solvent, and the content of a polymer component in the ink is 20 mass % or less relative to the pigment.

Claims

11 · 1 independent · depth 3

11 granted claims

›1.independentA non-aqueous ink comprisingnat least a pigment and an organic solvent, and substantially containing no polymer component,wherein the organic solvent …+10

›2.↳ 1The non-aqueous ink as claimed in claim 1, wherein the carbonate compound is at least one selected from ethylene carbonate, propylene carbonate, 1,2-b…d2+3

›3.↳ 1The non-aqueous ink as claimed in claim 1, wherein a content of the heterocyclic compound is 60 to 97 mass % relative to the total amount of the ink.d2+2

›4.↳ 1The non-aqueous ink as claimed in claim 1, wherein the pigment is carbon black subjected to an acidic treatment.d2+1

›5.↳ 1The non-aqueous ink as claimed in claim 1, wherein the ink is an inkjet ink.d2

Classifications

4 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C09D11/322
C09D11/36
C09D11/02

USPC · US Patent Classification

106/31.86

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Pendency

3.2 y

1,163 days filing → grant

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non-final + final

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1 RCE

Examiner

Veronica F Faison

art unit 1731 · TC 1700

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Citations: 23 back · 0 forward

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›Priority documents — 1

Type	Document	Date
related publication	US 20130233203 A1	12 Sep 2013

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