EP0943666A2
Expired / Lapsed
EP
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Ink, ink set, ink cartridge, recording unit, image recording apparatus and image recording method
Assignee: Canon Inc
•
Filing: 1999-03-19
•
Granted: —
•
Expires: 2019-03-19
Abstract
Abstract Provided is a black ink capable of mitigating the dependency on image quality of recording media and giving a high quality image stably, which comprises at least one salt selected from the group consisting of (M1) 2 SO 4 , CH 3 COO(M1), Ph_COO(M1), (M1)NO 3 , (M1)Cl, (M1)Br, (M1)I, (M1) 2 SO 3 and (M1) 2 CO 3 , where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group, and a self dispersible carbon black.
Inventors
- 👤 Osumi c/o CANON K.K. Koichi
- 👤 Hattori c/o CANON K.K. Yoshifumi
- 👤 Takizawa c/o CANON K.K. Yoshihisa
- 👤 Mishina c/o CANON K.K. Shinya
- 👤 Sanada c/o CANON K.K. Mikio
- 👤 Teraoka c/o CANON K.K. Hisashi
- 👤 Yakushigawa c/o CANON K.K. Yuko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 17:13
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/38; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; C09D11/32; C09D11/324; C09D11/40
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
61 words
An aqueous ink comprising at least one salt
selected from the group consisting of (M1) 2 SO 4 ,
CH 3 COO(M1), Ph-COO(M1), (M1)NO 3 , (M1)Cl, (M1)Br, (M1)I,
(M1) 2 SO 3 and (M1) 2 CO 3 , where M1 represents an alkali
metal, ammonium or an organo-ammonium and Ph is a
phenyl group, and a self dispersible carbon black.
Claim 2
Dependent Claim
29 words
The ink according to claim 1, wherein the salt
is contained in an amount of from 0.05 to 10 % by
weight relative to the whole weight of ink.
Claim 3
Dependent Claim
29 words
The ink according to claim 2, wherein the salt
is contained in an amount of from 0.1 to 5 % by weight
relative to the whole weight of ink.
Claim 4
Dependent Claim
26 words
The ink according to claim 1, wherein the
carbon black has at least one hydrophilic group bonded
directly or via another atomic group to the surface.
Claim 5
Dependent Claim
97 words
The ink according to claim 4, wherein the
hydrophilic group is at least one selected from the
group consisting of -COO(M2), -SO 3 (M2) 2 , -PO 3 H( M2),
PO 3 (M2) 2 , -NH 3 + , -NR 3 + , -SO 3 N + H 3 , -SO 3 N + H 2 COR, and where M2 in the formulae is a hydrogen atom, an alkali
metal, ammonium or organo-ammonium and R is an alkyl
group having 1 to 12 carbon atoms, a substituted or
unsubstituted phenyl group or substituted or
unsubstituted naphthyl group.
Claim 6
Dependent Claim
33 words
The ink according to claim 4, wherein the
another atomic group is an alkylene group having 1 to
12 carbon atoms, a substituted or unsubstituted
phenylene group or substituted or unsubstituted
naphthylene group.
Claim 7
Dependent Claim
37 words
The ink according to claim 1, wherein the
hydrophilic group is at least one selected from the
group consisting of -COO(M2), -SO 3 (M2) 2 and -PO 3 H(M2) 2 where M2 is the same as M1.
Claim 8
Dependent Claim
18 words
The ink according to any one of claims 1 to 7,
wherein the ink further comprises a stabilizer.
Claim 9
Dependent Claim
12 words
The ink according to claim 8, wherein the
stabilizer is a surfactant.
Claim 10
Dependent Claim
13 words
The ink according to claim 9, wherein the
surfactant is an ionic surfactant.
Claim 11
Dependent Claim
11 words
The ink according to claim 8, wherein the
stabilizer is dodecylbenzenesulfonate.
Claim 12
Dependent Claim
27 words
The ink according to any one of claims 8 to
11, wherein the stabilizer is contained in an amount of
from 0.02 to 0.1 % by weight.
Claim 13
Dependent Claim
22 words
The ink according to any one of claims 1 to
12, wherein the ink has a pH of from 9 to 12.
Claim 14
Dependent Claim
17 words
The ink according to claim 13, wherein the
ink has a pH of from 9 to 11.
Claim 15
Dependent Claim
18 words
The ink according to any one of claims 1 to
12, wherein the ink further comprises an antioxidant.
Claim 16
Dependent Claim
21 words
The ink according to claim 15, wherein the
antioxidant is contained in an amount of from 0.02 to
10% by weight.
Claim 17
Dependent Claim
25 words
The ink according to claim 15 or 16, wherein
the antioxidant is at least one selected from the group
consisting of sulfites, ascorbates and hydrogensulfite.
Claim 18
Dependent Claim
20 words
The ink according to any one of claims 1 to
17, wherein the ink further comprises a water-soluble
polymer compound.
Claim 19
Dependent Claim
22 words
The ink according to claim 18, wherein the
water-soluble polymer compound has a weight average
molecular weight of from 1,000 to 5,000.
Claim 20
Dependent Claim
33 words
The ink according to claim 18 or 19, wherein
the water-soluble polymer compound is contained in an
amount of from 0.02 to 2 % by weight relative to the
whole weight of ink.
Claim 21
Dependent Claim
36 words
The ink according to any one of claims 18 to
20, wherein the water-soluble polymer compound is
contained in an amount of from 0.1 to 1 % by weight
relative to the whole weight of ink.
Claim 22
Dependent Claim
107 words
An ink for forming a predetermined optical
density of print image on a recording medium by an ink-jet
method, wherein the ink comprises at least one salt
selected from the group consisting of (M1) 2 SO 4 ,
CH 3 COO(M1), Ph-COO(M1), (M1)NO 3 , (M1)Cl, (M1)Br, (M1)I,
(M1) 2 SO 3 and (M1) 2 CO 3 , where M1 is an alkali metal,
ammonium or organic ammonium and Ph is a phenyl group,
and a self dispersible carbon black; and wherein a concentration of the carbon black is
concentration that the predetermined optical density of
image cannot be obtained in case that no salt is
contained.
Claim 23
Dependent Claim
24 words
The ink according to any one of claims 1 to
22, wherein Ka value measured by the Bristow method is
not more than 1.5.
Claim 24
Dependent Claim
24 words
The ink according to claims 23, wherein the
Ka value measured by the Bristow method is within a
range of from 0.2 to 1.5.
Claim 25
Dependent Claim
45 words
An ink set comprising a combination of an
aqueous ink comprising at least one coloring material
selected from coloring materials for cyan, for magenta,
for yellow, for red, for green and for blue and the ink
according to any one of claims 1 to 24.
Claim 26
Dependent Claim
19 words
The ink set according to claim 25, wherein
the coloring material is an acid dye or a direct dye.
Claim 27
Dependent Claim
14 words
The ink set according to claim 25, wherein
the coloring material is a pigment.
Claim 28
Dependent Claim
19 words
An ink cartridge comprising an ink tank
containing the ink according to any one of claims 1 to
25.
Claim 29
Dependent Claim
28 words
A recording unit equipped with an ink
container containing an ink according to any one of
claims 1 to 25; and a head section for ejecting the
ink.
Claim 30
Dependent Claim
34 words
An image recording apparatus comprising: an ink cartridge according to claim 28, a
recording head for ejecting the ink; and supply means for supplying the ink from the ink
cartridge to the recording head.
Claim 31
Dependent Claim
12 words
An image recording apparatus comprising a
recording unit according to claim 29.
Claim 32
Dependent Claim
66 words
An image recording apparatus comprising an ink container holding an aqueous ink comprising
at least one coloring material selected from coloring
materials for cyan, for magenta, for yellow, for red,
for green and for blue, an ink container holding an aqueous ink according
to any one of claims 1 to 24; and a head section for respectively ejecting the inks
stored in individual ink storing sections.
Claim 33
Dependent Claim
91 words
An image recording apparatus comprising an ink cartridge equipped with an ink container
holding an aqueous ink comprising at least one coloring
material selected from coloring materials for cyan, for
magenta, for yellow, for red, for green and for blue; an ink cartridge equipped with an ink container
holding an aqueous ink according to any one of claims 1
to 24; a head section for respectively ejecting the ink
held in individual ink containers; and supply means for supplying the ink from the
respective ink cartridges to the respective head
sections.
Claim 34
Dependent Claim
35 words
An image recording method for ejecting an ink
according to any one of claims 1 to 24 toward a
recording medium surface and depositing the ink to the
surface for the recording of an image.
Claim 35
Dependent Claim
17 words
An image recording method according to claim
31, wherein energy for ejecting the ink is thermal
energy.
Claim 36
Dependent Claim
17 words
An image recording method according to claim
31, wherein energy for ejecting the ink is mechanical
energy.
Claim 37
Dependent Claim
80 words
A color image forming method comprising the
steps of: ejecting a first aqueous ink comprising at least
one coloring material selected from coloring materials
for cyan, for magenta, for yellow, for red, for green
and for blue toward the surface of a recording medium
to deposit the ink to the surface; and ejecting a second ink as set forth in any one of
claims 1 to 24 toward the surface of a recording medium
and depositing it to the surface.
References Cited (Backward Citations)
No citation records indexed.
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