EP0761783A2
Expired / Lapsed
EP
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Pigment ink composition capable of forming image having no significant bleeding or feathering
Assignee: Seiko Epson Corp
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Filing: 1996-08-30
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Granted: —
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Expires: 2016-08-30
Abstract
Abstract An ink for ink jet recording is provided which can form a record having a high color density, free from the occurrence of bleeding or feathering even on recycled paper, and possessing water resistance. An ink composition comprising a pigment dispersible and/or soluble in water without the aid of any dispersant and a glycol ether selected from the group consisting of diethylene glycol mono-n-butyl ether, triethylene glycol mono-n-butyl ether, propylene glycol mono-n-butyl ether, and dipropylene glycol mono-n-butyl ether can realize a print having no significant bleeding or feathering. Further, a high-quality image having much less bleeding or feathering can be realized by an ink jet recording method wherein a reaction solution, containing a reactant, capable of breaking the state of dispersion and/or dissolution of a pigment in the ink composition is brought into contact with the ink composition.
Inventors
- 👤 Yatake c/o Seiko Epson Corp. Masahiro
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 01:26
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; C09D11/54
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
56 words
An ink composition comprising a pigment, a glycol ether, and water, the pigment being dispersible and/or soluble in water without the aid of any dispersant, the glycol ether being diethylene glycol mono-n-butyl ether, triethylene glycol mono-n-butyl ether, propylene glycol mono-n-butyl ether, dipropylene glycol mono-n-butyl ether or a mixture of two or more of said glycol ethers.
Claim 2
Dependent Claim
52 words
The ink composition according to claim 1, wherein the pigment has been treated to bond at least one functional group selected from carbonyl, carboxyl, hydroxyl and sulfonyl groups or a salt thereof onto the surface thereof, permitting the pigment to be dispersed and/or dissolved in water without the aid of any dispersant.
Claim 3
Dependent Claim
27 words
The ink composition according to claim 1 or 2, wherein the composition comprises the pigment in an amount within the range of 2 to 15% by weight.
Claim 4
Dependent Claim
31 words
The ink composition according to any one of claims 1 to 3, wherein the composition comprises the glycol ether in an amount within the range of 3 to 30% by weight.
Claim 5
Dependent Claim
19 words
The ink composition according to any one of claims 1 to 4, which further comprises an acetylene glycol surfactant.
Claim 6
Dependent Claim
27 words
The ink composition according to claim 5, wherein the composition comprises the acetylene glycol surfactant in an amount within the range of 0.1 to 5% by weight.
Claim 7
Dependent Claim
17 words
The ink composition according to any one of claims 1 to 6, which further comprises a glycol.
Claim 8
Dependent Claim
25 words
The ink composition according to claim 7, wherein the composition comprises the glycol in an amount within the range of 3 to 25% by weight.
Claim 9
Dependent Claim
17 words
The ink composition according to any one of claims 1 to 8, which further comprises a dye.
Claim 10
Dependent Claim
79 words
The ink composition according to claim 9, wherein the dye is a water-soluble dye represented by the following general formula (I) or (II): wherein A represents POOM or COOM, X and Y each independently represent an alkoxy or alkyl group, M represents an alkali metal, H, or NH 4 or an organic amine; and wherein M represents an alkali metal, H, or NH 4 or an organic amine, m is 1 or 2 and n is 0 or 1.
Claim 11
Dependent Claim
27 words
The ink composition according to claim 10, wherein the amount of the water-soluble dye added is 50 to less than 200% by weight based on the pigment.
Claim 12
Dependent Claim
24 words
The ink composition according to any one of claims 1 to 11, which further comprises a surfactant and/or a regulated polymerization type water-soluble resin.
Claim 13
Dependent Claim
26 words
The ink composition according to claim 12, wherein the surfactant and/or the regulated polymerization type water-soluble resin can promote or stabilize the dispersion of the pigment.
Claim 14
Dependent Claim
59 words
A recording method comprising the step of: depositing a reactant-containing reaction solution and an ink composition onto a recording medium to conduct printing, wherein an ink composition according to any of claims 1 to 13 is used as the ink composition, and the reactant is a material which can break the state of dispersion and/or dissolution of the pigment.
Claim 15
Dependent Claim
16 words
The recording method according to claim 14, wherein the reactant is a cationic material or salt.
Claim 16
Dependent Claim
33 words
The recording method according to claim 15, wherein the cationic material is selected from the group consisting of primary, secondary, tertiary, and quaternary amines and compounds having in molecule ammonium, phosphorus, and phosphonium.
Claim 17
Dependent Claim
24 words
The recording method according to claim 15, wherein the salt is a polyallylamine, polyethyleneimine, polyvinyl pyrrolidone, polyvinyl imidazole, polyvinyl pyridine, ionene, or polydialkylallylammonium salt.
Claim 18
Dependent Claim
34 words
The recording method according to claim 15, wherein the salt is formend with as a cation species a metal ion of alkali metal, an alkaline earth metal, aluminum, zinc, chromium, copper, nickel, or iron.
Claim 19
Dependent Claim
26 words
The recording method according to any one of claims 14 to 18, wherein the reaction solution contains a colorant and serves also as an ink composition.
Claim 20
Dependent Claim
33 words
The recording method according to any one of claims 14 to 19, wherein, after the deposition of the reaction solution on the recording medium, the ink composition is printed on the recording medium.
Claim 21
Dependent Claim
38 words
The recording method according to claim 20, wherein the time taken from the deposition of the reaction solution onto the recording medium to the initiation of the printing of the ink composition is not more than 3 sec.
Claim 22
Dependent Claim
33 words
The recording method according to any one of claims 14 to 19, wherein, after the printing of the ink composition on the recording medium, the reaction solution is deposited onto the recording medium.
Claim 23
Dependent Claim
35 words
The recording method according to any one of claims 14 to 19, wherein the reaction solution is combined with the ink composition immediately before or after the deposition onto the recording medium to conduct printing.
Claim 24
Dependent Claim
21 words
The recording method according to any one of claims 14 to 23, wherein the reaction solution further contains a glycol ether.
Claim 25
Dependent Claim
22 words
The recording method according to any one of claims 14 to 24, wherein the reaction solution further contains an acetylene glycol surfactant.
Claim 26
Dependent Claim
30 words
The recording method according to claim 25, wherein the acetylene glycol surfactant in the reaction solution is present in an amount within the range of 0.1 to 5% by weight.
Claim 27
Dependent Claim
36 words
The recording method according to any one of claims 14 to 26, wherein the reaction solution and/or the ink composition are ejected as droplets through fine nozzles and the droplets are deposited onto the recording medium.
Claim 28
Dependent Claim
47 words
The recording method according to claim 27, wherein, during a period wherein the droplets of the ink composition is not under ejection, the ink composition is moved to vibrate within the fine nozzle to such an extent that it is not ejected as droplets through the nozzle.
Claim 29
Dependent Claim
21 words
The recording method according to claim 28, wherein the pigment content of the ink composition is 5 to 15% by weight.
Claim 30
Dependent Claim
33 words
The recording method according to any one of claims 14 to 29, wherein the amount of the ink composition used is 50 to 200% based on the amount of the reaction solution used.
Claim 31
Dependent Claim
19 words
A recorded medium obtained by printing using a recording method according to any one of claims 14 to 30.
References Cited (Backward Citations)
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