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US5976233A
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Water-based pigment ink, and ink-jet recording method and instruments using the same
Assignee: Canon Inc
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Filing: 1997-11-10
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Granted: 1999-11-02
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Expires: 2017-11-10
Abstract
Abstract Disclosed herein is a water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group directly or through another atomic group to the surface of carbon black, a humectant of the general formula H--(CH.sub.2).sub.m --C--((CH.sub.2).sub.n OH).sub.3 wherein m and n are independently an integer of from 1 to 5, and an aqueous medium composed of water and a water-soluble organic solvent.
Inventors
- 👤 Koichi Osumi
- 👤 Yoshifumi Hattori
- 👤 Yoshihisa Takizawa
- 👤 Ryuji Katsuragi
- 👤 Hisashi Teraoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:01
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/324
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
64 words
A water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group through another atomic group to the surface of carbon black, a humectant of the general formula H--(CH.sub.2).sub.m --C--((CH.sub.2).sub.n OH).sub.3 wherein m and n are independently an integer of 1 to 5, and an aqueous medium composed of water and a water-soluble organic solvent.
Claim 2
Dependent Claim
64 words
A water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group through another atomic group to the surface of carbon black, a humectant of the general formula H--(CH.sub.2).sub.m --C--((CH.sub.2).sub.n OH).sub.3 wherein m and n are independently an integer of 1 to 5, and an aqueous medium composed of water and a water-soluble organic solvent.
Claim 3
Dependent Claim
65 words
A water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group through an alkylene group having 1 to 12 carbon atoms, a phenylene group which may be substituted, or a naphthylene group which may be substituted, to the surface of carbon black, trimethylolpropane, and an aqueous medium composed of water and a water-soluble organic solvent.
Claim 4
Dependent Claim
65 words
A water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group through an alkylene group having 1 to 12 carbon atoms, a phenylene group which may be substituted, or a naphthylene group which may be substituted, to the surface of carbon black, trimethylolpropane, and an aqueous medium composed of water and a water-soluble organic solvent.
Claim 5
Dependent Claim
74 words
The water-based pigment ink according to claim 1, wherein the hydrophilic group is at least one selected from the group consisting of the residues: --COOM, --SO.sub.3 M, --SO.sub.2 NH.sub.2, --PO.sub.3 HM, --PO.sub.3 M.sub.2, --SO.sub.2 NHCOR, --NH.sub.3.sup.+, --NR.sub.3.sup.+, ##STR15## wherein M is hydrogen, alkali metal, ammonium or organic ammonium, R is an alkyl group having 1 to 12 carbon atoms, a phenyl group which may be substituted, or a naphthyl group which may be substituted.
Claim 6
Dependent Claim
74 words
The water-based pigment ink according to claim 2, wherein the hydrophilic group is at least one selected from the group consisting of the residues: --COOM, --SO.sub.3 M, --SO.sub.2 NH.sub.2, --PO.sub.3 HM, --PO.sub.3 M.sub.2, --SO.sub.2 NHCOR, --NH.sub.3.sup.+, --NR.sub.3.sup.+, ##STR16## wherein M is hydrogen, alkali metal, ammonium or organic ammonium, R is an alkyl group having 1 to 12 carbon atoms, a phenyl group which may be substituted, or a naphthyl group which may be substituted.
Claim 7
Dependent Claim
16 words
The water-based pigment ink according to claim 1, wherein the hydrophilic group is a basic group.
Claim 8
Dependent Claim
16 words
The water-based pigment ink according to claim 2, wherein the hydrophilic group is a basic group.
Claim 9
Dependent Claim
32 words
The water-based pigment ink according to claim 1, wherein the coloring material is contained in an amount ranging from 0.1 to 15% by weight based on the total weight of the ink.
Claim 10
Dependent Claim
32 words
The water-based pigment ink according to claim 2, wherein the coloring material is contained in an amount ranging from 0.1 to 15% by weight based on the total weight of the ink.
Claim 11
Dependent Claim
32 words
The water-based pigment ink according to claim 1, wherein the coloring material is contained in an amount ranging from 1 to 10% by weight based on the total weight of the ink.
Claim 12
Dependent Claim
32 words
The water-based pigment ink according to claim 2, wherein the coloring material is contained in an amount ranging from 1 to 10% by weight based on the total weight of the ink.
Claim 13
Dependent Claim
31 words
The water-based pigment ink according to claim 1, wherein the humectant is contained in an amount ranging from 1 to 30% by weight based on the total weight of the ink.
Claim 14
Dependent Claim
31 words
The water-based pigment ink according to claim 1, wherein the humectant is contained in an amount ranging from 1 to 10% by weight based on the total weight of the ink.
Claim 15
Dependent Claim
31 words
The water-based pigment ink according to claim 2, wherein the trimethylolpropane is contained in an amount ranging from 1 to 30% by weight based on the total weight of the ink.
Claim 16
Dependent Claim
31 words
The water-based pigment ink according to claim 2, wherein the trimethylolpropane is contained in an amount ranging from 1 to 10% by weight based on the total weight of the ink.
Claim 17
Dependent Claim
83 words
The water-based pigment ink according to claim 1, which further comprises at least one surfactant selected from the group consisting of surfactants of the formulae (1) to (4) R--O--(CH.sub.2 CH.sub.2 O).sub.n --H (1) wherein R is an alkyl group, and n is an integer; ##STR17## wherein R is an alkyl group, and n is an integer; ##STR18## wherein R is hydrogen or an alkyl group, and m and n are independently an integer; and ##STR19## wherein m and n are independently an integer.
Claim 18
Dependent Claim
83 words
The water-based pigment ink according to claim 2, which further comprises at least one surfactant selected from the group consisting of surfactants of the formulae (1) to (4) R--O--(CH.sub.2 CH.sub.2 O).sub.n --H (1) wherein R is an alkyl group, and n is an integer; ##STR20## wherein R is an alkyl group, and n is an integer; ##STR21## wherein R is hydrogen or an alkyl group, and m and n are independently an integer; and ##STR22## wherein m and n are independently an integer.
Claim 19
Dependent Claim
31 words
The water-based pigment ink according to claim 15, wherein the surfactant is contained in an amount ranging from 0.01 to 5.0% by weight based on the total weight of the ink.
Claim 20
Dependent Claim
31 words
The water-based pigment ink according to claim 16, wherein the surfactant is contained in an amount ranging from 0.01 to 5.0% by weight based on the total weight of the ink.
Claim 21
Dependent Claim
38 words
An ink-jet recording method comprising applying an ink by an ink-jet system to a recording medium to conduct recording, wherein the water-based pigment ink according to any one of claims 1 to 18 is used as said ink.
Claim 22
Dependent Claim
29 words
The ink-jet recording method according to claim 19, wherein the ink-jet system is an ink-jet system in which thermal energy is applied to the ink to eject the ink.
Claim 23
Dependent Claim
29 words
The ink-jet recording method according to claim 19, wherein the ink-jet system is an ink-jet system in which mechanical energy is applied to the ink to eject the ink.
Claim 24
Dependent Claim
41 words
A recording unit comprising an ink container portion with an ink held therein and a head from which the ink is ejected, wherein the water-based pigment ink according to any one of claims 1 to 18 is used as said ink.
Claim 25
Dependent Claim
32 words
An ink cartridge comprising an ink container portion with an ink held therein, wherein the water-based pigment ink according to any one of claims 1 to 18 is used as said ink.
Claim 26
Dependent Claim
46 words
An ink-jet recording apparatus comprising a recording unit having an ink container portion with an ink held therein and a head from which the ink is ejected, wherein the water-based pigment ink according to any one of claims 1 to 18 is used as said ink.
Claim 27
Dependent Claim
46 words
An ink-jet recording apparatus comprising an ink cartridge having an ink container portion with an ink held therein and a head from which the ink is ejected, wherein the water-based pigment ink according to any one of claims 1 to 18 is used as said ink.
Claim 28
Dependent Claim
26 words
The ink-jet recording apparatus according to claim 25, which further comprises an ink feeder for feeding the ink contained in the ink cartridge to the head.
Claim 29
Independent Claim
38 words
A method of improving the impact accuracy of an ink ejected, which comprises the step of applying the water-based pigment ink according to any one of claims 1 to 18 to a recording medium by an ink-jet system.
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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) | 2002-11-01 | 2003-05-03 | 2003-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-01 | 2007-05-03 | 2007-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-01 | 2011-05-03 | 2011-11-02 | $7700.00 | Window Closed / Lapsed |