US6022908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing liquids for improved print quality
Assignee: Hewlett Packard Development Co LP
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Filing: 1998-04-22
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Granted: 2000-02-08
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Expires: 2018-04-22
Abstract
Abstract A set of printing liquids is disclosed comprising a first anionic printing liquid comprising an aqueous vehicle, at least one first colorant, and at least one first anionic polymer; a second anionic printing liquid comprising an aqueous vehicle at least one second colorant, at least one second anionic polymer, and an acid additive having a pKa up to the pKa of the at least first polymer of the first liquid; a third cationic printing liquid comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic printing liquid comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent. More specifically, the present set of printing liquids may find application in ink-jet printing. The set of ink-jet inks provides improved print quality, specifically, reduced bleed; improved edge-acuity, uniform area fills, and color quality; while maximizing lightfastness without sacrificing printing reliability.
Inventors
- 👤 Zeying Ma
- 👤 Keshava A. Prasad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:42
CPC Classifications
B; B41; B41J; B41J2/00; C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
147 words
A set of printing liquids, comprising: a first anionic printing liquid comprising an aqueous vehicle, at least one first pigmented colorant, and at least one first anionic polymer for dispersing said first pigmented colorant thereby providing a first dispersed pigment; a second anionic printing liquid comprising an aqueous vehicle; at least one second pigmented colorant, at least one second anionic polymer for dispersing said second pigmeneted colorant thereby providing a second dispersed pigment, and an acid additive having a pKa up to the pKa of the at least first dispersed pigment of the first liquid; a third cationic printing liquid comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic printing liquid comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent.
Claim 2
Dependent Claim
147 words
A set of printing liquids, comprising: a first anionic printing liquid comprising an aqueous vehicle, at least one first pigmented colorant, and at least one first anionic polymer for dispersing said first pigmented colorant thereby providing a first dispersed pigment; a second anionic printing liquid comprising an aqueous vehicle; at least one second pigmented colorant, at least one second anionic polymer for dispersing said second pigmeneted colorant thereby providing a second dispersed pigment, and an acid additive having a pKa up to the pKa of the at least first dispersed pigment of the first liquid; a third cationic printing liquid comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic printing liquid comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent.
Claim 3
Dependent Claim
37 words
The set of claim 1 wherein said at least one first anionic polymer has at least one neutralized carboxylic acid group; and said at least one second anionic polymer has at least one sulfonate or phosphate group.
Claim 4
Dependent Claim
42 words
The set of claim 2 wherein the at least first anionic polymer, the at least second anionic polymer, and the at least third cationic polymer are independently selected from the group consisting of homopolymer, copolymer, block polymer, branched polymer, and graft polymer.
Claim 5
Dependent Claim
34 words
The set of claim 3 wherein the at least one third colorant is a third pigmented colorant and the at least one third catonic polymer is a dispersant for dispersing said third pigmented colorant.
Claim 6
Dependent Claim
102 words
The set of claim 4 wherein said at least one third cationic polymer has at least one pendent ionic moiety of the formula ##STR2## wherein A is selected from the group consisting of N, P, and S; R 1 , R 2 and R 3 are independently selected from the group consisting of H, alkyl or alkyl ether of 1-20 carbon atoms, and aryl or alkylaryl of 1-10 carbon atoms, wherein R 3 is not present when A is S; and wherein X is selected from the group consisting of halides, conjugate bases of organic acids, and conjugate bases of inorganic acids.
Claim 7
Dependent Claim
17 words
The set of claim 5 wherein the at least one cationic polymer is an AB block polymer.
Claim 8
Dependent Claim
44 words
The set of claim 6 wherein the at least one cationic AB block polymer comprises an A block prepared from homopolymers or copolymers of methyl methacrylate and butyl methacrylate and a B block prepared from homopolymers or copolymers of dimethylaminoethyl methacrylate and diethylaminoethyl methacrylate.
Claim 9
Dependent Claim
57 words
The set of claim 4 wherein the at least first polymer and the at least second polymer are selected from the group consisting of AB, BAB, and ABC block copolymers, and Ax(BA)yBz graft copolymers wherein x is from 0 to about 10,000, y is from about 2 to about 10,000, and z is 0 to about 10,000.
Claim 10
Dependent Claim
43 words
The set of claim 2 wherein the acid additive is an organic acid selected from the group consisting of polyacrylic, acetic, glycolic, malonic, malic, maleic, ascorbic, succinic, glutaric, fimaric, citric, tartaric, lactic, bromoacetic, chloroacetic, chloropropionic, phthalic, sulfonic, and ortho-phosphoric acid and derivatives thereof.
Claim 11
Dependent Claim
59 words
The set of claim 2 wherein the precipitating agent is a multi-valent metal salt comprising a multi-valent metal cation selected from the group consisting of Zn +2 , Mg +2 , Ca +2 , Cu +2 , Co +2 , Ni +2 , Fe +2 , La +3 , Nd +3 , Y +3 , and Al +3 .
Claim 12
Dependent Claim
15 words
The set of claim 2 wherein the fourth anionic liquid further comprises an acid additive.
Claim 13
Dependent Claim
30 words
The set of claim 1 wherein the first printing liquid, the second printing liquid, the third printing liquid, and the fourth printing liquid are black, magenta, yellow, and cyan respectively.
Claim 14
Dependent Claim
18 words
A set of printing liquids according to claim 1 wherein the set is particularly adapted for ink-jet printing.
Claim 15
Dependent Claim
110 words
A set of printing liquids, comprising: a first anionic printing liquid comprising an aqueous vehicle, at least one firt colorant, and at least one first anionic polymer; a second anionic printing liquid comprising an aqueous vehicle; at least one second colorant, at least one second anionic polymer, and an acid additive having a pKa up to about 3.5; a third cationic printing liquid comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic printing liquid comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent.
Claim 16
Dependent Claim
110 words
A set of printing liquids, comprising: a first anionic printing liquid comprising an aqueous vehicle, at least one firt colorant, and at least one first anionic polymer; a second anionic printing liquid comprising an aqueous vehicle; at least one second colorant, at least one second anionic polymer, and an acid additive having a pKa up to about 3.5; a third cationic printing liquid comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic printing liquid comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent.
References Cited (Backward Citations)
US5053494A
Cited
US5006582A
Cited
US5203912A
Cited
US5102448A
Cited
US5085698A
Cited
US5272201A
Cited
US5091005A
Cited
US5116409A
Cited
US5133803A
Cited
US5106416A
Cited
US5181045A
Cited
US5320668A
Cited
US5231131A
Cited
EP0556649A1
Cited
US5198023A
Cited
US5428383A
Cited
EP0586079A1
Cited
US5555008A
Cited
US5518534A
Cited
US5565022A
Cited
US5531816A
Cited
US5713989A
Cited
US5679143A
Cited
US5785743A
Cited
US5695820A
Cited
US5713993A
Cited
US5853465A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2003-02-07 | 2003-08-09 | 2004-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-07 | 2007-08-09 | 2008-02-08 | $3760.00 | Window Closed / Lapsed |
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