US5713993A
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US
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Pigmented ink set and process for alleviating bleed in printed elements using carboxylic acid additives
Assignee: EIDP Inc
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Filing: 1996-08-30
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Granted: 1998-02-03
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Expires: 2016-08-30
Abstract
Abstract Bleed between two adjacent pigmented inks on a printing medium is reduced. The first ink has at least one neutralized carboxylic acid group, neutralized amine, or a quaternized amine group; and the second ink contains a polymeric dispersant having at least one sulfonate or phosphonate group, and a carboxylic acid additive having a pKa of up to 3.5.
Inventors
- 👤 Loretta Ann Grezzo Page
- 👤 Milan Bohuslav Bednarek
- 👤 Zeying Ma
- 👤 Keshava Anand Prasad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:59
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
110 words
A set of printing liquids particularly adapted to alleviate bleed from one liquid into the other during printing comprising: (a) a first pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one group selected from the group consisting of a neutralized carboxylic acid group, a neutralized amine group and a quaternized amine group; and (b) a second pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a C(O)OH moiety and having a pKa of up to 3.5.
Claim 2
Dependent Claim
110 words
A set of printing liquids particularly adapted to alleviate bleed from one liquid into the other during printing comprising: (a) a first pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one group selected from the group consisting of a neutralized carboxylic acid group, a neutralized amine group and a quaternized amine group; and (b) a second pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a C(O)OH moiety and having a pKa of up to 3.5.
Claim 3
Dependent Claim
15 words
The set of claim 1 wherein both the first and second printing liquids are anionic.
Claim 4
Dependent Claim
19 words
The set of claim 1 wherein the first printing liquid is cationic and the second printing liquid is anionic.
Claim 5
Dependent Claim
47 words
The set of claim 1 wherein said dispersants are selected from the group consisting of AB, BAB, and ABC block copolymers, and A x (BA) y B z graft copolymers wherein x is 0 to 10,000, y is 2 to 10,000, and z is 0 to 10,000.
Claim 6
Dependent Claim
31 words
The set of claim 1 wherein the carboxylic acid additive is present in the amount of approximately 0.2 to 30%, based on the total weight of the second pigmented printing liquid.
Claim 7
Dependent Claim
38 words
The set of claim 5 wherein the carboxylic acid additive is selected from the group consisting of oxalic acid, citric acid, glycolic acid, bromoacetic acid, chloroacetic acid, chloropropionic acid, maleic acid, malonic acid, phthalic acid and tartaric acid.
Claim 8
Dependent Claim
106 words
An ink set particularly adapted to alleviate bleed from one ink to the other during ink-jet printing, said ink set comprising: (a) a first pigmented ink comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one group consisting of a neutralized carboxylic acid group, a neutralized amine group, and a quaternized amine group; and (b) a second pigmented ink comprising: (i) an aqueous carrier medium, (ii) a pigment, (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a C(O)OH moiety and having a pKa of up to 3.5.
Claim 9
Dependent Claim
106 words
An ink set particularly adapted to alleviate bleed from one ink to the other during ink-jet printing, said ink set comprising: (a) a first pigmented ink comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one group consisting of a neutralized carboxylic acid group, a neutralized amine group, and a quaternized amine group; and (b) a second pigmented ink comprising: (i) an aqueous carrier medium, (ii) a pigment, (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a C(O)OH moiety and having a pKa of up to 3.5.
Claim 10
Dependent Claim
47 words
The set of claim 7 wherein said dispersants are selected from the group consisting of AB, BAB, and ABC block copolymers and A x (BA) y B z graft copolymers wherein x is 0 to 10,000, y is 2 to 10,000, and z is 0 to 10,000.
Claim 11
Dependent Claim
34 words
The ink set of claim 8 wherein the carboxylic acid additive present in said second ink is present in the amount of approximately 0.2 to 30%, based on the total weight of said ink.
Claim 12
Dependent Claim
18 words
The ink set of claim 9 wherein said carboxylic acid additive has a pKa up to approximately 2.5.
Claim 13
Dependent Claim
39 words
The ink set of claim 9 wherein said carboxylic acid additive is selected from the group consisting of oxalic acid, citric acid, glycolic acid, bromoacetic acid, chloroacetic acid, chloropropionic acid, maleic acid, malonic acid, phthalic acid and tartaric acid.
Claim 14
Dependent Claim
42 words
The ink set of claim 8 wherein said pigment in each ink has a particle size of 0.005 to 15 microns and is present in the amount of approximately 0.1 to 15% by weight, based on the total weight of the ink.
Claim 15
Dependent Claim
36 words
The ink set of claim 7 wherein the polymeric dispersant in the first ink is quaternized with at least one compound selected from the group consisting of benzyl chloride, methyl iodide, methyl sulfate and dimethyl sulfate.
Claim 16
Dependent Claim
23 words
The ink set of claim 7 wherein the polymeric dispersant in the first ink is neutralized with dimethylethanolamine, sodium hyroxide or potassium hydroxide.
Claim 17
Dependent Claim
38 words
The ink set of claim 7 wherein the polymer in the second ink is neutralized with at least one compound selected from the group consisting of organic bases; alcohol amines; pyridine; ammonium hydroxide; tetraalkylammonium salts and alkali metals.
Claim 18
Dependent Claim
122 words
A process for creating a multicolor printed element having reduced color bleed comprising: (a) providing a first pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant containing at least one group selected from the group consisting of a neutralized carboxylic acid group, a neutralized amine group, and a quaternized amine group; (b) providing a second pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a C(O)OH moiety and having a pKa of up to 3.5; and (c) applying said first and second printing liquids to a substrate in contact with each other.
Claim 19
Dependent Claim
122 words
A process for creating a multicolor printed element having reduced color bleed comprising: (a) providing a first pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant containing at least one group selected from the group consisting of a neutralized carboxylic acid group, a neutralized amine group, and a quaternized amine group; (b) providing a second pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a C(O)OH moiety and having a pKa of up to 3.5; and (c) applying said first and second printing liquids to a substrate in contact with each other.
Claim 20
Dependent Claim
21 words
The process of claim 16 wherein said printing liquids are inks and are applied to said substrate by an ink-jet printer.
Claim 21
Dependent Claim
16 words
The process of claim 17 wherein said inks are applied in abutting relationship to each other.
Claim 22
Dependent Claim
16 words
The process of claim 17 wherein said inks are applied in overlay relationship to each other.
Claim 23
Dependent Claim
10 words
The process of claim 17 wherein said substrate is paper.
Claim 24
Dependent Claim
47 words
The process of claim 17 wherein said dispersants are selected from the group consisting of AB, BAB, and ABC block copolymers, and A x (BA) y B z graft copolymers wherein x is 0 to 10,000, y is 2 to 10,000, and z is 0 to 10,000.
Claim 25
Dependent Claim
30 words
The process of claim 21 wherein the carboxylic acid present in said second ink in the amount of approximately 0.2 to 30%, based on the total weight of said ink.
Claim 26
Dependent Claim
17 words
The process of claim 22 wherein said carboxylic acid additive has a pKa up to approximately 2.5.
Claim 27
Dependent Claim
38 words
The process of claim 22 wherein said carboxylic acid additive is selected from the group consisting of oxalic acid, citric acid, glycolic acid, bromoacetic acid, chloroacetic acid, chloropropionic acid, maleic acid, malonic acid, phthalic acid and tartaric acid.
Claim 28
Dependent Claim
41 words
The process of claim 21 wherein said pigment in each ink has a particle size of 0.005 to 15 microns and is present in the amount of approximately 0.1 to 15% by weight, based on the total weight of the ink.
Claim 29
Dependent Claim
35 words
The process of claim 17 wherein the polymeric dispersant in the first ink is quaternized with at least one compound selected from the group consisting of benzyl chloride, methyl iodide, methyl sulfate and dimethyl sulfate.
Claim 30
Dependent Claim
22 words
The process of claim 17 wherein the polymeric dispersant in the first ink is neutralized with dimethylethanolamine, sodium hyroxide or potassium hydroxide.
Claim 31
Dependent Claim
37 words
The process of claim 17 wherein the polymer in the second ink is neutralized with at least one compound selected from the group consisting of organic bases; alcohol amines; pyridine; ammonium hydroxide; tetraalkylammonium salts and alkali metals.
Claim 32
Dependent Claim
106 words
A set of printing liquids particularly adapted to alleviate bleed from one liquid into the other during printing comprising: (a) a cationic pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one group selected from the group consisting of a neutralized carboxylic acid group, a neutralized amine group and a quaternized amine group; and (b) an anionic pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a pKa of up to 3.5.
Claim 33
Dependent Claim
106 words
A set of printing liquids particularly adapted to alleviate bleed from one liquid into the other during printing comprising: (a) a cationic pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one group selected from the group consisting of a neutralized carboxylic acid group, a neutralized amine group and a quaternized amine group; and (b) an anionic pigmented printing liquid comprising: (i) an aqueous carrier medium, (ii) a pigment, and (iii) a polymeric dispersant having at least one sulfonate or phosphonate group, and (iv) a carboxylic acid additive having a pKa of up to 3.5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-02 | 2001-08-04 | 2002-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-02 | 2005-08-04 | 2006-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-02 | 2009-08-04 | 2010-02-03 | $7700.00 | Window Closed / Lapsed |