EP0867484A2
Expired / Lapsed
EP
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Ink-composition for ink jet recording
Assignee: Seiko Epson Corp
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Filing: 1998-03-27
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Granted: —
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Expires: 2018-03-27
Abstract
Abstract An ink composition is provided which can realize an image having excellent rubbing/scratch resistance and waterfastness, is free from a clogged nozzle problem, and enables stable printing. The ink composition comprises a colorant, a fine particle of a polymer, a water-soluble organic solvent, and water, the fine particle of the polymer having a film-forming property, a carboxyl group on its surface, and a reactivity with a divalent metal salt such that, when three volumes of an aqueous emulsion, of the fine particle of the polymer, having a fine particle concentration of 0.1% by weight is brought into contact with one volume of an aqueous divalent metal salt solution having a concentration of 1 mol/liter, the time for the transmission of light at a wavelength of 700 nm to be decreased to 50% of the initial transmission is not more than 1 x 10 4 sec.
Inventors
- 👤 Toshiyuki Miyabayashi
- 👤 Yasushi Takamatsu
- 👤 Futoshi Hoshino
- 👤 Masatoshi Kaneko
- 👤 Toshihiro Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 04:03
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
118 words
An ink composition comprising a colorant, a fine
particle of a polymer, a water-soluble organic solvent, and
water, the fine particle of the polymer having a film-forming
property, a carboxyl group on its surface, and a reactivity
with a divalent metal salt such that, when three volumes
of an aqueous emulsion, of the fine particle of the
polymer, having a fine particle concentration of 0.1% by
weight is brought into contact with one volume of an
aqueous divalent metal salt solution having a concentration
of 1 mol/liter, the time for the transmission of light at
a wavelength of 700 nm to be decreased to 50% of the
initial transmission is not more than 1 x 10 4 sec.
Claim 2
Dependent Claim
51 words
The ink composition according to claim 1, wherein
when the fine particle of the polymer is dispersed in a
water to prepare an aqueous emulsion having a fine particle
concentration of 10% by weight, the contact angle of the
resultant aqueous emulsion on a teflon sheet is not less
than 70°.
Claim 3
Dependent Claim
52 words
The ink composition according to claim 1, wherein
when the fine particle of the polymer is dispersed in a
water to prepare an aqueous emulsion having a fine particle
concentration of 35% by weight, the resultant aqueous
emulsion has a surface tension of not less than 40 x 10 -3 N/m (20°C).
Claim 4
Dependent Claim
61 words
The ink composition according to any one of claims
1 to 3, wherein the fine particle of the polymer comprises
1 tpo 10% by weight of a structure derived from an
unsaturated vinyl monomer having a carboxyl group and 0.2
to 4% by weight of a crosslinkable monomer-derived
structure crosslinked by a crosslinkable monomer having two
or more polymerizable double bonds.
Claim 5
Dependent Claim
29 words
The ink composition according to any one of claims
1 to 4, wherein the fine particle of the polymer has a
core/shell structure comprising a core and a shell.
Claim 6
Dependent Claim
16 words
The ink composition according to claim 5, wherein
the fine particle of the polymer is self-crosslinkable.
Claim 7
Dependent Claim
27 words
The ink composition according to claim 6, wherein
the core comprises a resin having an epoxy group with the
shell comprising a resin having a carboxyl group.
Claim 8
Dependent Claim
28 words
The ink composition according to any one of claims
1 to 7, wherein the fine particle of the polymer has a
minimum film-forming temperature of 30°C or below.
Claim 9
Dependent Claim
25 words
The ink composition according to any one of claims
1 to 8, wherein the water-soluble organic solvent has a
boiling point of 180°C or above.
Claim 10
Dependent Claim
116 words
A fine particle of a polymer for use in an ink
composition for ink jet recording, said fine particle of a polymer having a film-forming
property, a carboxyl group on its surface, and a reactivity
with a divalent metal salt such that, when three volumes
of an aqueous emulsion, of the fine particle of the
polymer, having a fine particle concentration of 0.1% by
weight, is brought into contact with one volume of an
aqueous divalent metal salt solution having a concentration
of 1 mol/liter, the time for the transmission of light at
a wavelength of 700 nm to be decreased to 50% of the
initial transmission is not more than 1 x 10 4 sec.
Claim 11
Dependent Claim
43 words
The fine particle of a polymer according to claim
10, wherein the contact angle of an aqueous emulsion, of
the fine particle of the polymer, having a fine particle
concentration of 10% by weight on a teflon sheet is not
less than 70°.
Claim 12
Dependent Claim
42 words
The fine particle of a polymer according to claim
10, wherein the surface tension of an aqueous emulsion, of
the fine particle of the polymer, having a concentration
of 35% by weight is not loss than 40 x 10 -3 N/m (20°C).
Claim 13
Dependent Claim
58 words
The fine particle of a polymer according to any
one of claims 10 to 12, which comprises 1 to 10% by weight
of a structure derived from an unsaturated vinyl monomer
having a carboxyl group and 0.2 to 4% by weight of a
crosslinkable monomer-derived structure crosslinked by a
crosslinkable monomer having two or more polymerizable
double bonds.
Claim 14
Dependent Claim
20 words
The fine particle of a polymer according to any
one of claims 10 to 13, which has a core/shell structure.
Claim 15
Dependent Claim
13 words
The fine particle of a polymer according to claim
14, which is self-crosslinkable.
Claim 16
Dependent Claim
30 words
The fine particle of the polymer according to
claim 15, wherein the core comprises a resin having an
epoxy group with the shell comprising a resin having a
carboxyl group.
Claim 17
Dependent Claim
31 words
The fine particle of the polymer according to any
one of claims 10 to 16, wherein the fine particle of the
polymer has a minimum film-forming temperature of 30°C or
below.
Claim 18
Dependent Claim
37 words
A recording method comprising the step of
depositing an ink composition onto a recording medium to
conduct printing on the recording medium, wherein the ink
composition is one according to any one of claims 1 to 9.
Claim 19
Dependent Claim
45 words
An ink jet recording method comprising the steps
of: ejecting droplets of an ink composition; and depositing
the droplets onto a recording medium to conduct printing
on the recording medium, wherein the ink composition is one
according to any one of claims 1 to 9.
Claim 20
Dependent Claim
13 words
A record produced by the recording method
according to claim 18 or 19.
References Cited (Backward Citations)
No citation records indexed.
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