US4994110A
Expired / Lapsed
US
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Dyes containing lithium for ink-jet printing inks
Assignee: HP Inc
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Filing: 1989-12-22
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Granted: 1991-02-19
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Expires: 2009-12-22
Abstract
Abstract Inks used in ink-jet printing comprise a vehicle and a dye. The vehicle consists essentially of about 5 to 10 wt % of a glycol and/or glycol ether and the balance water. The dye is typically an anionic dye, associated with undesirable cations such as sodium or potassium cations. Several properties of such inks are improved by replacing substantially all of said cations on the anionic dye with lithium cations and removing such cations, preferably to leave a maximum concentration of such cations of less than about 500 ppm, and most preferably less than about 350 ppm.
Inventors
- 👤 John L. Stoffel
- 👤 Ronald A. Askeland
- 👤 William D. Kappele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:22
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
97 words
A thermal ink-jet composition suitable for use in ink-jet printers comprising: (a) a vehicle comprising about 5 to 10% at least one member selected from the group consisting of glycols ethers and the balance water; and (b) a dye having at least one negatively charged functional group per molecule, present in an amount up to about 0.1 Molar of the vehicle composition, said dye having a plurality of anionic sites, originally associated with undesirable cations, substantially all of said cations being replaced with lithium cations, said ink containing less than about 500 ppm of said undesirable cations.
Claim 2
Dependent Claim
97 words
A thermal ink-jet composition suitable for use in ink-jet printers comprising: (a) a vehicle comprising about 5 to 10% at least one member selected from the group consisting of glycols ethers and the balance water; and (b) a dye having at least one negatively charged functional group per molecule, present in an amount up to about 0.1 Molar of the vehicle composition, said dye having a plurality of anionic sites, originally associated with undesirable cations, substantially all of said cations being replaced with lithium cations, said ink containing less than about 500 ppm of said undesirable cations.
Claim 3
Dependent Claim
21 words
The ink composition of claim 1 wherein said undesirable cations are selected from the group consisting of sodium and potassium cations.
Claim 4
Dependent Claim
23 words
The ink composition of claim 1 wherein said member is selected from the group consisting of diethylene glycol, triethylene glycol and polyethylene glycols.
Claim 5
Dependent Claim
25 words
The ink composition of claim 3 wherein said vehicle consists essentially of diethylene glycol, present in an amount of about 5.5%, and the balance water.
Claim 6
Dependent Claim
27 words
The ink composition of claim 1 wherein said dye includes at least one functional group per molecule selected from the group consisting of sulfonate and carboxylate groups.
Claim 7
Dependent Claim
15 words
The ink composition of claim 1 containing less than about 350 ppm of sodium cations.
Claim 8
Dependent Claim
117 words
A thermal ink-jet composition suitable for use in thermal ink-jet printers comprising: (a) a vehicle comprising about 5% to less than about 10% of at least one member selected from the group consisting of glycols and glycol ethers and the balance water; and (b) a dye having at least one negatively charged functional group per molecule selected from the group consisting of sulfonate and carboxylate groups, said dye present in an amount up to about 0.1 Molar of the vehicle composition, said dye having a plurality of anionic sites, originally associated with sodium catations, substantially all of said sodium cations being replaced with lithium cations, said ink containing less than about 500 ppm of said sodium cations.
Claim 9
Dependent Claim
117 words
A thermal ink-jet composition suitable for use in thermal ink-jet printers comprising: (a) a vehicle comprising about 5% to less than about 10% of at least one member selected from the group consisting of glycols and glycol ethers and the balance water; and (b) a dye having at least one negatively charged functional group per molecule selected from the group consisting of sulfonate and carboxylate groups, said dye present in an amount up to about 0.1 Molar of the vehicle composition, said dye having a plurality of anionic sites, originally associated with sodium catations, substantially all of said sodium cations being replaced with lithium cations, said ink containing less than about 500 ppm of said sodium cations.
Claim 10
Dependent Claim
23 words
The ink composition of claim 7 wherein said member is selected from the group consisting of diethylene glycol, triethylene glycol and polyethylene glycols.
Claim 11
Dependent Claim
25 words
The ink composition of claim 8 wherein said vehicle consists essentially of diethylene glycol, present in an amount of about 5.5%, and the balance water.
Claim 12
Dependent Claim
15 words
The ink composition of claim 8 containing less than about 350 ppm of sodium cations.
Claim 13
Dependent Claim
123 words
A process for increasing dye solubility without adversely affecting kogation in a thermal ink-jet ink comprising a vehicle and a dye, said vehicle comprising about 5 to 10% of at least one member selected from the group consisting of glycols and glycol ethers and the balance water and said dye having at least one negatively charged functional group per molecule, said dye being present in an amount up to about 0.1 Molar of the vehicle composition and having a plurality of anionic sites originally associated with undesirable cations, said process comprising replacing substantially all of said undesirable cations with lithium cations and removing substantially all of said undesirable cations to provide said ink containing less than about 500 ppm of said undesirable cations.
Claim 14
Dependent Claim
123 words
A process for increasing dye solubility without adversely affecting kogation in a thermal ink-jet ink comprising a vehicle and a dye, said vehicle comprising about 5 to 10% of at least one member selected from the group consisting of glycols and glycol ethers and the balance water and said dye having at least one negatively charged functional group per molecule, said dye being present in an amount up to about 0.1 Molar of the vehicle composition and having a plurality of anionic sites originally associated with undesirable cations, said process comprising replacing substantially all of said undesirable cations with lithium cations and removing substantially all of said undesirable cations to provide said ink containing less than about 500 ppm of said undesirable cations.
Claim 15
Dependent Claim
20 words
The process of claim 11 wherein said undesirable cations are selected from the group consisting of sodium and potassium cations.
Claim 16
Dependent Claim
22 words
The process of claim 11 wherein said member is selected from the group consisting of diethylene glycol, triethylene glycol and polyethylene glycols.
Claim 17
Dependent Claim
23 words
The process of claim 13 wherein said vehicle consists essentially of diethylene glycol, present in an amount of 5.5%, and the balance water.
Claim 18
Dependent Claim
26 words
The process of claim 12 wherein said dye includes at least one functional group per molecule selected from the group consisting of sulfonate and coaroxylate groups.
Claim 19
Dependent Claim
23 words
The process of claim 12 wherein said ink following said replacing and said removal contains less than about 350 ppm of undesirable cations.
Claim 20
Dependent Claim
136 words
A process for increasing dye solubility without adversely affecting kogation in a thermal ink-jet ink comprising a vehicle and a dye, said vehicle comprising about 5% to less than about 10% of at least one member selected from the group consisting of glycols and glycol ethers and the balance water and said dye having at least one negatively charged functional group per molecule selected from the group consisting of sulfonate and carboxylate groups, said dye present in an amount up to about 0.1 Molar of the vehicle composition, said dye having a plurality of anionic sites, originally associated with sodium cations, said process comprising replacing substantially all of said sodium cations with lithium cations and removing substantially all of said sodium cations to provide said ink containing less than about 500 ppm of said sodium cations.
Claim 21
Dependent Claim
136 words
A process for increasing dye solubility without adversely affecting kogation in a thermal ink-jet ink comprising a vehicle and a dye, said vehicle comprising about 5% to less than about 10% of at least one member selected from the group consisting of glycols and glycol ethers and the balance water and said dye having at least one negatively charged functional group per molecule selected from the group consisting of sulfonate and carboxylate groups, said dye present in an amount up to about 0.1 Molar of the vehicle composition, said dye having a plurality of anionic sites, originally associated with sodium cations, said process comprising replacing substantially all of said sodium cations with lithium cations and removing substantially all of said sodium cations to provide said ink containing less than about 500 ppm of said sodium cations.
Claim 22
Dependent Claim
22 words
The process of claim 17 wherein said member is selected from the group consisting of diethylene glycol, triethylene glycol and polyethylene glycols.
Claim 23
Dependent Claim
24 words
The process of claim 18 wherein said vehicle consists essentially of diethylene glycol, present in an amount of about 5.5%, and the balance water.
Claim 24
Dependent Claim
23 words
The process of claim 17 wherein said ink following said replacing and said removal contains less than about 350 ppm of sodium cations.
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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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
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