US6719420B2
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US
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Liquid composition, ink set, method for forming colored portion on recording medium, and ink-jet recording apparatus
Assignee: Canon Inc
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Filing: 2002-05-06
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Granted: 2004-04-13
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Expires: 2022-05-06
Abstract
Abstract The present invention relates to a liquid composition for forming a colored portion on a recording medium together with an anionic or cationic water-based ink containing a coloring material. The liquid composition comprises a solvent, fine particles in a dispersion state, wherein the fine particles have a surface charge in a polarity opposite to the water-based ink and has ion whose polarity is opposite to that of the fine particles in an ionic equivalence of 0.1-40 meq/l.
Inventors
- 👤 Hiroshi Tomioka
- 👤 Yutaka Kurabayashi
- 👤 Masao Kato
- 👤 Makiko Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:15
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/54; B; B41; B41M; B41M7/00; B41M7/0018; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
74 words
A liquid composition for forming a colored portion on a recording medium together with an anionic or cationic water-based ink containing a coloring material, comprising a solvent, and fine particles in a dispersion state, wherein the fine particles have a surface charge in a polarity opposite to the water-based ink, and the liquid composition further comprises ions whose polarity is opposite to that of the fine particles in an ionic equivalence of 0.1-40 meq/l.
Claim 2
Dependent Claim
74 words
A liquid composition for forming a colored portion on a recording medium together with an anionic or cationic water-based ink containing a coloring material, comprising a solvent, and fine particles in a dispersion state, wherein the fine particles have a surface charge in a polarity opposite to the water-based ink, and the liquid composition further comprises ions whose polarity is opposite to that of the fine particles in an ionic equivalence of 0.1-40 meq/l.
Claim 3
Dependent Claim
19 words
The liquid composition according to claim 1 , wherein the ionic equivalence is in a range of 1-30 meq/l.
Claim 4
Dependent Claim
14 words
The liquid composition according to claim 1 , wherein the fine particles are aspherical.
Claim 5
Dependent Claim
30 words
The liquid composition according to claim 1 , wherein the fine particles adsorb the colorant on the surface thereof while preventing the colorant from agglomerating when forming the colored portion.
Claim 6
Dependent Claim
27 words
The liquid composition according to claim 1 , wherein the fine particles adsorb the colorant on the surface thereof while keeping the colorant in a monomolecular state.
Claim 7
Dependent Claim
20 words
The liquid composition according to claim 1 , wherein the liquid composition has a zeta-potential of +5 to +90 mV.
Claim 8
Dependent Claim
20 words
The liquid composition according to claim 1 , further containing an acid, and having a pH of 2 to 7.
Claim 9
Dependent Claim
23 words
The liquid composition according to claim 7 , wherein the acid has a primary dissociation constant pKa of 5 or lower in water.
Claim 10
Dependent Claim
20 words
The liquid composition according to claim 1 , wherein the liquid composition has a zeta-potential of −5 to −90 mV.
Claim 11
Dependent Claim
20 words
The liquid composition according to claim 1 , further containing a base, and having a pH of 7 to 12.
Claim 12
Dependent Claim
23 words
The liquid composition according to claim 10 , wherein the base has a primary dissociation constant pKb of 5 or lower in water.
Claim 13
Dependent Claim
76 words
An ink set comprising an ink and a liquid composition respectively, the ink being an anionic or cationic water based ink, and the liquid composition comprising a solvent, and fine particles in a dispersion state, wherein the fine particles have a surface charged in a polarity opposite to the water-based ink and wherein the liquid composition further comprises ions whose polarity is opposite to that of the fine particles in an ionic equivalence of 0.1-40 meq/l.
Claim 14
Dependent Claim
76 words
An ink set comprising an ink and a liquid composition respectively, the ink being an anionic or cationic water based ink, and the liquid composition comprising a solvent, and fine particles in a dispersion state, wherein the fine particles have a surface charged in a polarity opposite to the water-based ink and wherein the liquid composition further comprises ions whose polarity is opposite to that of the fine particles in an ionic equivalence of 0.1-40 meq/l.
Claim 15
Dependent Claim
37 words
The ink set according to claim 12 , comprising at least one ink as the ink selected from the group consisting of yellow ink, magenta ink, cyan ink, black ink, red ink, blue ink and green ink.
Claim 16
Dependent Claim
22 words
The ink set according to claim 12 , comprising a yellow ink, a magenta ink, and a cyan ink as the ink.
Claim 17
Dependent Claim
25 words
The ink set according to claim 12 , comprising a yellow ink, a magenta ink, a cyan ink, and a black ink as the ink.
Claim 18
Dependent Claim
25 words
The ink set according to claim 12 , wherein the ink is anionic and a zeta-potential of the liquid composition is +5 to +90 mV.
Claim 19
Dependent Claim
28 words
The ink set according to claim 12 , wherein the ink is anionic, and the liquid composition contains an acid and has a pH of 2 to 7.
Claim 20
Dependent Claim
27 words
The ink set according to claim 17 , wherein the acid in the liquid composition has a primary dissociation constant pKa of 5 or lower in water.
Claim 21
Dependent Claim
25 words
The ink set according to claim 12 , wherein the ink is cationic, and the liquid composition has a zeta-potential of −5 to −90 mV.
Claim 22
Dependent Claim
28 words
The ink set according to claim 12 , wherein the ink is cationic and the liquid composition contains a base, and has a pH of 7 to 12.
Claim 23
Dependent Claim
27 words
The ink set according to claim 20 , wherein the base in the liquid composition has a primary dissociation constant pKb of 5 or lower in water.
Claim 24
Dependent Claim
18 words
The ink set according to claim 12 , wherein the ink is anionic and contains an anionic compound.
Claim 25
Dependent Claim
20 words
The ink set according to claim 22 , wherein the anionic compound is a water-soluble dye having an anionic group.
Claim 26
Dependent Claim
23 words
The ink set according to claim 22 , wherein the anionic compound is a pigment having an anionic group on the surface thereof.
Claim 27
Dependent Claim
25 words
The ink set according to claim 22 , wherein the ink contains a pigment and an anionic compound that is a dispersant for the pigment.
Claim 28
Dependent Claim
18 words
The ink set according to claim 12 , wherein the ink is cationic and contains a cationic compound.
Claim 29
Dependent Claim
40 words
A method for forming a colored portion on a recording medium, comprising the steps of: (i) applying an ink containing a coloring material to a recording medium; and (ii) applying a liquid composition of claim 1 to the recording medium.
Claim 30
Dependent Claim
17 words
The method of claim 27 , wherein the step (ii) is conducted prior to the step (i).
Claim 31
Dependent Claim
21 words
The method according to claim 27 , wherein the step (i) is conducted twice, and the step (ii) is conducted therebetween.
Claim 32
Dependent Claim
40 words
The method according to claim 27 , wherein in the step (i) the ink is applied to the recording medium by an ink-jet recording method in which the ink is ejected from an orifice in response to a recording signal.
Claim 33
Dependent Claim
26 words
The method according to claim 30 , wherein the ink-jet recording method is a method for ejecting the ink by applying heat energy to the ink.
Claim 34
Dependent Claim
42 words
The method according to claim 27 , wherein in the step (ii) the liquid composition is applied to the recording medium by an ink-jet recording method in which the liquid composition is ejected from an orifice in response to a recording signal.
Claim 35
Dependent Claim
28 words
The method according to claim 32 , wherein the ink-jet recording method is a method for ejecting the liquid composition by applying heat energy to the liquid composition.
Claim 36
Dependent Claim
41 words
An ink-jet recording apparatus comprising an ink container containing an ink comprising a coloring material, and a liquid composition container containing the liquid composition of claim 1 , and an ink-jet head for ejecting the ink and the liquid composition respectively.
Claim 37
Dependent Claim
29 words
The ink-jet recording apparatus according to claim 34 , wherein the ink-jet head is a thermal ink-jet head for ejecting a liquid by applying heat energy to the liquid.
Claim 38
Dependent Claim
73 words
The liquid composition according to claim 1 , wherein the fine particles adsorb the colorant on the surface thereof or bind the colorant to the surface thereof when the liquid composition and the ink are brought into contact with each other in a liquid state, the adsorbed or bound colorant on or to the surface of the fine particles being in the same molecular state as that of the colorant in the ink.
Claim 39
Dependent Claim
21 words
The liquid composition according to claim 3 , wherein the particle size of the fine particles is 150 nm or less.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-04-13 | 2007-10-13 | 2008-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-13 | 2011-10-13 | 2012-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-13 | 2015-10-13 | 2016-04-13 | $7700.00 | Window Closed / Lapsed |