US5221332A
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US
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Ink compositions
Assignee: Xerox Corp
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Filing: 1991-04-29
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Granted: 1993-06-22
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Expires: 2011-04-29
Abstract
Abstract An ink composition which comprises an aqueous liquid vehicle, a colorant, and silica particles in an amount of from about 0.1 to about 5 percent by weight. The inks are particularly suited for ink jet printing processes, including thermal ink jet printing processes, and exhibit increased drop volume and increased drop velocity when employed in ink jet printing processes.
Inventors
- 👤 Julia A. Kohlmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:56
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/38
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
52 words
An ink composition which consists essentially of water, a water-miscible organic liquid, a colorant in an amount of at least about 0.5 percent by weight, an optional surfactant, an optional biocide, an optional pH controlling agent, and silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 2
Dependent Claim
52 words
An ink composition which consists essentially of water, a water-miscible organic liquid, a colorant in an amount of at least about 0.5 percent by weight, an optional surfactant, an optional biocide, an optional pH controlling agent, and silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 3
Dependent Claim
53 words
An ink composition according to claim 1 wherein the water-miscible organic component is selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycols, glycerine, dipropylene glycol, polyethylene glycols, polypropylene glycols, amides, ethers, carboxylic acids, esters, alcohols, organosulfides, organosulfoxides, sulfones, dimethylsulfoxide, sulfolane, alcohol derivatives, ether derivatives, amino alcohols, ketones, and mixtures thereof.
Claim 4
Dependent Claim
27 words
An ink composition according to claim 1 wherein the water-miscible organic liquid is present in an amount of from about 3 to about 70 percent by weight.
Claim 5
Dependent Claim
15 words
An ink composition according to claim 1 wherein the water-miscible organic liquid is diethylene glycol.
Claim 6
Dependent Claim
26 words
An ink composition according to claim 4 wherein the diethylene glycol is present in an amount of from about 4.5 to about 6.5 percent by weight.
Claim 7
Dependent Claim
15 words
An ink composition according to claim 1 wherein the colorant is Food Black 2 dye.
Claim 8
Dependent Claim
21 words
An ink composition according to claim 1 wherein the silica particles have an average particle diameter of less than 0.1 micron.
Claim 9
Dependent Claim
26 words
An ink composition according to claim 1 wherein the silica particles are present in an amount of from about 0.5 to about 5 percent by weight.
Claim 10
Dependent Claim
72 words
In a printing process which comprises (1) incorporating into an ink jet printing apparatus an ink composition; and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate, the improvement which comprises employing an ink composition which comprises an aqueous liquid vehicle, a colorant, and silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 11
Dependent Claim
72 words
In a printing process which comprises (1) incorporating into an ink jet printing apparatus an ink composition; and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate, the improvement which comprises employing an ink composition which comprises an aqueous liquid vehicle, a colorant, and silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 12
Dependent Claim
42 words
A printing process according to claim 9 wherein the ink jet printing apparatus is a thermal ink jet printer and the ink in the printer is selectively heated in an imagewise pattern, thereby causing droplets to be ejected in an imagewise pattern.
Claim 13
Dependent Claim
21 words
A printing process according to claim 9 wherein the liquid vehicle comprises a mixture of water and a water-miscible organic component.
Claim 14
Dependent Claim
53 words
A printing process according to claim 11 wherein the water-miscible organic component is selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycols, glycerin, dipropylene glycols, polyethylene glycols, polypropylene glycols, amides, ethers, carboxylic acids, esters, alcohols, organosulfides, organosulfoxides, sulfones, dimethylsulfoxide, sulfolane, alcohol derivatives, ether derivatives, amino alcohols, ketones, and mixtures thereof.
Claim 15
Dependent Claim
27 words
A printing process according to claim 11 wherein the water-miscible organic component is present in an amount of from about 3 to about 70 percent by weight.
Claim 16
Dependent Claim
15 words
A printing process according to claim 11 wherein the water-miscible organic component is diethylene glycol.
Claim 17
Dependent Claim
26 words
A printing process according to claim 14 wherein the diethylene glycol is present in an amount of from about 4.5 to about 6.5 percent by weight.
Claim 18
Dependent Claim
15 words
A printing process according to claim 9 wherein the colorant is Food Black 2 dye.
Claim 19
Dependent Claim
21 words
A printing process according to claim 9 wherein the silica particles have an average particle diameter of less than 0.1 micron.
Claim 20
Dependent Claim
26 words
A printing process according to claim 9 wherein the silica particles are present in an amount of from about 0.5 to about 5 percent by weight.
Claim 21
Dependent Claim
53 words
An ink composition which consists essentially of water, a water-miscible organic liquid, a colorant in an amount of at least about 0.5 percent by weight, an optional surfactant, an optional biocide, an optional pH controlling agent, and colorless silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 22
Dependent Claim
53 words
An ink composition which consists essentially of water, a water-miscible organic liquid, a colorant in an amount of at least about 0.5 percent by weight, an optional surfactant, an optional biocide, an optional pH controlling agent, and colorless silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 23
Dependent Claim
73 words
In a printing process which comprises (1) incorporating into an ink jet printing apparatus an ink composition; and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate, the improvement which comprises employing an ink composition which comprises an aqueous liquid vehicle, a colorant, and colorless silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 24
Dependent Claim
73 words
In a printing process which comprises (1) incorporating into an ink jet printing apparatus an ink composition; and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate, the improvement which comprises employing an ink composition which comprises an aqueous liquid vehicle, a colorant, and colorless silica particles in an amount of from about 0.1 to about 5 percent by weight.
Claim 25
Dependent Claim
87 words
In a printing process which comprises (1) incorporating into an ink jet printing apparatus an ink composition; and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate, the improvement which comprises employing an ink composition which consists essentially of water, a water-miscible organic liquid, a colorant, an optional surfactant, an optional biocide, an optional pH controlling agent, and colorless silica particle sin an amount of from about 0.1 to about 5 percent by weight.
Claim 26
Dependent Claim
87 words
In a printing process which comprises (1) incorporating into an ink jet printing apparatus an ink composition; and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate, the improvement which comprises employing an ink composition which consists essentially of water, a water-miscible organic liquid, a colorant, an optional surfactant, an optional biocide, an optional pH controlling agent, and colorless silica particle sin an amount of from about 0.1 to about 5 percent by weight.
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