US4789400A
Expired / Lapsed
US
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Waterfast ink jet compositions and process
Assignee: Xerox Corp
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Filing: 1987-07-10
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Granted: 1988-12-06
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Expires: 2007-07-10
Abstract
Abstract An improved ink jet composition comprised of a major amount of water, a hydroxypropylated polyethyleneimine with a weight average molecular weight of from about 1,000 to about 10,000, and a dye component; and wherein the ink has a viscosity of from about 1 to about 5 centipoise.
Inventors
- 👤 Warren E. Solodar
- 👤 Henry R. Kang
- 👤 Joseph R. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:49
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
47 words
A waterfast ink jet composition comprised of a major amount of water, a hydroxypropylated polyethyleneimine with a weight average molecular weight of from about 1,000 to about 10,000, and a dye component, and wherein the ink has a viscosity of from about 1 to about 5 centipoise.
Claim 2
Dependent Claim
47 words
A waterfast ink jet composition comprised of a major amount of water, a hydroxypropylated polyethyleneimine with a weight average molecular weight of from about 1,000 to about 10,000, and a dye component, and wherein the ink has a viscosity of from about 1 to about 5 centipoise.
Claim 3
Dependent Claim
19 words
A composition in accordance with claim 1 wherein the hydroxypropylated polyethyleneimine is of a molecular weight of about 10,000.
Claim 4
Dependent Claim
21 words
A composition in accordance with claim 1 wherein the ink has a viscosity of from about 1.5 to about 3 centipoise.
Claim 5
Dependent Claim
20 words
A composition in accordance with claim 1 wherein the pH of the ink is from about 8 to about 10.
Claim 6
Dependent Claim
25 words
A composition in accordance with claim 1 wherein the water is present in an amount of from about 70 to about 90 percent by weight.
Claim 7
Dependent Claim
12 words
A composition in accordance with claim 1 wherein the dye is black.
Claim 8
Dependent Claim
27 words
A composition in accordance with claim 6 wherein the black dye is selected from the group consisting of Direct Dyes, Acid Dyes, Food Dyes, and Reactive Dyes.
Claim 9
Dependent Claim
16 words
A composition in accordance with claim 6 wherein the black dye is Pontamine Black SP Liquid.
Claim 10
Dependent Claim
13 words
A composition in accordance with claim 1 wherein a colored dye is selected.
Claim 11
Dependent Claim
24 words
A composition in accordance with claim 9 wherein the colored dye is selected from the group consisting of blue, red, yellow, and mixtures thereof.
Claim 12
Dependent Claim
29 words
A composition in accordance with claim 1 wherein the hydroxypropylated polyethyleneimine is present in an amount of from about 2 percent by weight to about 6 percent by weight.
Claim 13
Dependent Claim
28 words
A composition in accordance with claim 1 wherein the dye is present in an amount of from about 1 percent by weight to about 10 percent by weight.
Claim 14
Dependent Claim
24 words
A composition in accordance with claim 1 further including therein a component selected from the group consisting of benzyl alcohol, N-butyldiethanolamine, 2-(2-butoxyethoxy)-ethanol, and 1-methyl-2-pyrrolidinone.
Claim 15
Dependent Claim
26 words
A composition in accordance with claim 13 wherein the components selected are present in an amount of from about 0.5 to about 5 percent by weight.
Claim 16
Independent Claim
74 words
A method for the generation of images which comprises providing an ink jet printing apparatus; generating an image on a substrate; and subsequently affecting development of this image with an ink composition comprised of a major amount of water, a hydroxypropylated polyethyleneimine with a weight average molecular weight of from about 1,000 to about 10,000, and a dye componet; and wherein the ink has a viscosity of from about 1 to about 5 centipoise.
Claim 17
Independent Claim
74 words
A method for the generation of images which comprises providing an ink jet printing apparatus; generating an image on a substrate; and subsequently affecting development of this image with an ink composition comprised of a major amount of water, a hydroxypropylated polyethyleneimine with a weight average molecular weight of from about 1,000 to about 10,000, and a dye componet; and wherein the ink has a viscosity of from about 1 to about 5 centipoise.
Claim 18
Dependent Claim
20 words
A method of imaging in accordance with claim 15 wherein the hydroxypropylated polyethyleneimine has a molecular weight of about 10,000.
Claim 19
Dependent Claim
23 words
A method of imaging in accordance with claim 15 wherein the viscosity of the ink is from about 2 to about 3 centipoise.
Claim 20
Dependent Claim
22 words
A method of imaging in accordance with claim 15 wherein the pH of the ink is from about 8 to about 10.
Claim 21
Dependent Claim
34 words
A method of imaging in accordance with claim 15 wherein the dye for the ink is black and is selected from the group consisting of Direct Dyes, Acid Dyes, Food Dyes, and Reactive Dyes.
Claim 22
Dependent Claim
18 words
A method of imaging in accordance with claim 19 wherein the black dye is Pontamine Black SP Liquid.
Claim 23
Dependent Claim
18 words
A method of imaging in accordance with claim 15 wherein a colored dye is selected for the ink.
Claim 24
Dependent Claim
24 words
A method of imaging in accordance with claim 21 wherein the colored dye is selected from the group consisting of red, blue and yellow.
Claim 25
Dependent Claim
29 words
A method of imaging in accordance with claim 15 wherein the ink further includes therein a component selected from the group consisting of benzyl alcohol, N-butyldiethanolamine, 2-(2-butoxyethoxy)-ethanol, and 1-methyl-2-pyrrolidinone.
Claim 26
Dependent Claim
21 words
A composition in accordance with claim 1 wherein the ink exhibits a waterfastness of from about 80 to about 95 percent.
Claim 27
Dependent Claim
27 words
A composition in accordance with claim 24 wherein the dye is selected from the group consisting of Pontamine Black SP, Acid Red 249, and Cartasol Yellow 3GF.
References Cited (Backward Citations)
US4197135A
Cited
US4659382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
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