US5565022A
Expired / Lapsed
US
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Fast drying, bleed-free ink-jet ink compositions
Assignee: Hewlett Packard Development Co LP
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Filing: 1995-09-14
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Granted: 1996-10-15
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Expires: 2015-09-14
Abstract
Abstract Ink-jet ink compositions are provided which exhibit fast dry times and bleed-free prints when printed onto a print medium so that the throughput of an ink-jet printer may be increased. The ink compositions of the invention comprise (a) at least one dye; (b) at least one high-boiling, water-insoluble organic compound; (c) at least one amphiphile; and (d) water. The dye may be either water-soluble or water-insoluble and the high boiling organic compound has a vapor pressure low enough such that only water evaporates from the ink during normal printing operations. The amphiphile is present in an amount sufficient to solubilize the water-insoluble organic compound in the water. Preferably, the amphiphile belongs to a class of compounds known as hydrotropes.
Inventors
- 👤 Palitha Wickramanayake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:31
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; C09D11/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
59 words
An aqueous ink-jet ink composition with improved dry time and reduced bleed, said aqueous ink-jet ink composition comprising: (a) at least one dye; (b) at least one water-insoluble organic compound; (c) at least one amphiphile; and (d) water, wherein said amphiphile is present in an amount sufficient to solubilize said at least one water-insoluble organic compound in said water.
Claim 2
Dependent Claim
59 words
An aqueous ink-jet ink composition with improved dry time and reduced bleed, said aqueous ink-jet ink composition comprising: (a) at least one dye; (b) at least one water-insoluble organic compound; (c) at least one amphiphile; and (d) water, wherein said amphiphile is present in an amount sufficient to solubilize said at least one water-insoluble organic compound in said water.
Claim 3
Dependent Claim
32 words
The aqueous ink-jet ink composition of claim 1 wherein said at least one dye is present in said ink-jet ink composition in an amount ranging from about 0.1 to 10 wt %.
Claim 4
Dependent Claim
42 words
The aqueous ink-jet ink composition of claim 1 wherein said at least one water-insoluble organic compound is selected from the group consisting of water-insoluble monoglycol ethers, water-insoluble polyglycol ethers, water-insoluble N-substituted 2-pyrrolidones, water-insoluble monoglycol esters, water-insoluble polyglycol esters, and water insoluble hydrocarbons.
Claim 5
Dependent Claim
52 words
The aqueous ink-jet ink composition of claim 3 wherein said at least one water-insoluble organic compound is selected from the group consisting of monoethylene glycol phenyl ethers, polyethylene glycol phenyl ethers, monopropylene glycol phenyl ethers, polypropylene glycol phenyl ethers, ethylene glycol esters, propylene glycol esters, polyethylene glycol esters, and polypropylene glycol esters.
Claim 6
Dependent Claim
34 words
The aqueous ink-jet ink composition of claim 1 wherein said at least one water-insoluble organic compound is present in said ink-jet ink composition in an amount ranging from about 1 to 70 wt %.
Claim 7
Dependent Claim
18 words
The aqueous ink-jet ink composition of claim 1 wherein said at least one amphiphile is a hydrotropic amphiphile.
Claim 8
Dependent Claim
54 words
The aqueous ink-jet ink composition of claim 6 wherein said hydrotropic amphiphile is selected from the group consisting of sodium benzoate, sodium salicylate, sodium benzene sulfonate, sodium benzene disulfonate, sodium toluene sulfonate, sodium xylene sulfonate, sodium cumene sulfonate, sodium cymene sulfonate, sodium cinnamate, para amino benzoic acid hydrochloride, procaine hydrochloride, caffeine, resorcinol and pyrogallol.
Claim 9
Dependent Claim
42 words
The aqueous ink-jet ink composition of claim 1 wherein said at least one water-insoluble organic compound is selected from the group consisting of propylene glycol phenyl ether and ethylene glycol phenyl ether and said at least one amphiphile is sodium xylene sulfonate.
Claim 10
Dependent Claim
50 words
The aqueous ink-jet ink composition of claim 1 further comprising a co-surfactant comprising an alcohol having a carbon chain length ranging from three to eight carbon atoms in length, said alcohol having a concentration within the range of 0 to about 10 wt % of said aqueous ink-jet ink composition.
Claim 11
Dependent Claim
86 words
The aqueous ink-jet ink composition of claim 1 wherein said aqueous ink-jet ink comprises: (a) about 0.1 to 10 wt % of at least one water-insoluble dye; (b) about 1 to 70 wt % of at least one water-insoluble organic compound selected from the group consisting of propylene glycol phenyl ether and ethylene glycol phenyl ether; (c) sodium xylene sulfonate; and (d) water, wherein said sodium xylene sulfonate is present in an amount sufficient to solubilize said at least one water-insoluble organic compound in said water.
Claim 12
Dependent Claim
92 words
A process for reducing dry times in inks employed in ink-jet printing, comprising (a) formulating an ink-jet ink composition comprising (i) at least one dye, (ii) at least one water-insoluble organic compound, (iii) at least one amphiphile, and (iv) water, wherein said amphiphile is present in an amount sufficient to solubilize said at least one water-insoluble organic compound in said water; and (b) printing said ink-jet ink composition on a print medium by means of an ink-jet pen, whereby said ink-jet ink composition dries essentially instantaneously upon impact with said print medium.
Claim 13
Dependent Claim
92 words
A process for reducing dry times in inks employed in ink-jet printing, comprising (a) formulating an ink-jet ink composition comprising (i) at least one dye, (ii) at least one water-insoluble organic compound, (iii) at least one amphiphile, and (iv) water, wherein said amphiphile is present in an amount sufficient to solubilize said at least one water-insoluble organic compound in said water; and (b) printing said ink-jet ink composition on a print medium by means of an ink-jet pen, whereby said ink-jet ink composition dries essentially instantaneously upon impact with said print medium.
Claim 14
Dependent Claim
29 words
The process of claim 11 wherein said at least one dye is present in said ink-jet ink composition in an amount ranging from about 0.1 to 10 wt %.
Claim 15
Dependent Claim
38 words
The process of claim 11 wherein said at least one water-insoluble organic compound is selected from the group consisting of water-insoluble monoglycol ethers, water-insoluble polyglycol ethers, water-insoluble N-substituted 2-pyrrolidones, water-insoluble monoglycol esters, water-insoluble polyglycol esters, and water-insoluble hydrocarbons.
Claim 16
Dependent Claim
49 words
The process of claim 13 wherein said at least one water-insoluble organic compound is selected from the group consisting of monoethylene glycol phenyl ethers, polyethylene glycol phenyl ethers, monopropylene glycol phenyl ethers, polypropylene glycol phenyl ethers, ethylene glycol esters, propylene glycol esters, polyethylene glycol esters, and polypropylene glycol esters.
Claim 17
Dependent Claim
31 words
The process of claim 11 wherein said at least one water-insoluble organic compound is present in said ink-jet ink composition in an amount ranging from about 1 to 70 wt %.
Claim 18
Dependent Claim
15 words
The process of claim 11 wherein said at least one amphiphile is a hydrotropic amphiphile.
Claim 19
Dependent Claim
51 words
The process of claim 16 wherein said hydrotropic amphiphile is selected from the group consisting of sodium benzoate, sodium salicylate, sodium benzene sulfonate, sodium benzene disulfonate, sodium toluene sulfonate, sodium xylene sulfonate, sodium cumene sulfonate, sodium cymene sulfonate, sodium cinnamate, para amino benzoic acid hydrochloride, procaine hydrochloride, caffeine, resorcinol and pyrogallol.
Claim 20
Dependent Claim
39 words
The process of claim 11 wherein said at least one water-insoluble organic compound is selected from the group consisting of propylene glycol phenyl ether and ethylene glycol phenyl ether and said at least one amphiphile is sodium xylene sulfonate.
Claim 21
Dependent Claim
86 words
The process of claim 11 wherein said ink-jet ink composition is formulated to comprise: (a) about 0.1 to 10 wt % of at least one water-insoluble dye; (b) about 1 to 70 wt % of at least one water-insoluble organic compound selected from the group consisting of propylene glycol phenyl ether and ethylene glycol phenyl ether; (c) sodium xylene sulfonate; and (d) water, wherein said sodium xylene sulfonate is present in an amount sufficient to solubilize said at least one water-insoluble organic compound in said water.
Claim 22
Dependent Claim
51 words
The process of claim 11 wherein said ink-jet ink composition further comprises a co-surfactant comprising an alcohol having a carbon chain length ranging from three to eight carbon atoms in length, said alcohol having a concentration within the range of 0 to about 10 wt % of said ink-jet ink composition.
References Cited (Backward Citations)
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