US5725641A
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US
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Lightfast inks for ink-jet printing
Assignee: Hewlett Packard Development Co LP
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Filing: 1996-10-30
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Granted: 1998-03-10
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Expires: 2016-10-30
Abstract
Abstract Aqueous inks are provided for use in vehicles employing from about 10 to about 40 wt % of one or more organic solvents; and optionally up to about 5 wt % of an additive independently selected from the group consisting of surfactant, buffer, biocide, and mixtures thereof. The inks comprise, by weight, from about 1 to about 10 wt % Reactive Black 31 dye in either or both of its hydrolyzed forms, namely vinyl sulfone form and ethyl hydroxy form. Ink-jet inks made using the Pacified Reactive Black 31 provide improved lightfastness across a range of printing media while providing reliable ink-jet pen performance.
Inventors
- 👤 Cheryl A. Macleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328; C09D11/36
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
33 words
An ink-jet ink composition comprising: from about 1 to about 10 wt % dye having the formula ##STR3## wherein X is --CH 2 --CH 2 --O--H, or --CH═CH 2 , or mixtures thereof.
Claim 2
Dependent Claim
33 words
An ink-jet ink composition comprising: from about 1 to about 10 wt % dye having the formula ##STR3## wherein X is --CH 2 --CH 2 --O--H, or --CH═CH 2 , or mixtures thereof.
Claim 3
Dependent Claim
20 words
The ink of claim 1, wherein the concentration of said dye is from about 5 to about 10 wt %.
Claim 4
Dependent Claim
20 words
The ink of claim 1, wherein the concentration of said dye is from about 7 to about 10 wt %.
Claim 5
Dependent Claim
17 words
The ink of claim 1, wherein said ink contains less than about 1 wt % sulfate ion.
Claim 6
Dependent Claim
18 words
The ink of claim 1, wherein said ink contains less than about 1000 parts per million sulfate ion.
Claim 7
Dependent Claim
18 words
The ink of claim 1, wherein said ink contains less than about 100 parts per million sulfate ion.
Claim 8
Dependent Claim
43 words
The ink of claim 1, further comprising: from about 10 to about 40 wt % of an organic solvent; and optionally up to about 5 wt % of an additive independently selected from the group consisting of surfactant, biocide, buffer, and mixtures thereof.
Claim 9
Dependent Claim
64 words
The ink of claim 7, wherein: the organic solvent is present in an amount from about 15 to about 30 wt %; the surfactant is present in an amount from about 1 to about 4 wt %; the biocide is present in an amount up to about 1 wt %; and the buffer is present in an amount up to about 1 wt %.
Claim 10
Dependent Claim
62 words
The ink of claim 7, wherein: the organic solvent is present in an amount from about 20 to about 25 wt %; the surfactant is present in an amount from about 2 to about 3 wt %; the biocide is present in an amount up to 0.2 wt %; and the buffer is present in an amount up to 0.5 wt %.
Claim 11
Dependent Claim
57 words
The ink of claim 7, wherein: the organic solvent is selected from the group consisting of nitrogen-containing heterocyclic ketones, diols, glycols, and mixtures thereof; and the surfactant comprises at least one secondary alcohol ethoxylate surfactant predominantly having from about 4 to about 8 ethoxylated units and an aliphatic chain from about 12 to about 18 carbon atoms.
Claim 12
Dependent Claim
58 words
The ink of claim 7, wherein: the organic solvent is selected from the group consisting of 1,5-pentanediol, 2-pyrrolidone, N-methyl-pyrrolid-2-one, ethylhydroxy-propanediol, diethylene glycol, and mixtures thereof; and the surfactant comprises at least one secondary alcohol ethoxylate surfactant predominantly having from about 5 to about 7 ethoxylated units and an aliphatic chain from about 14 to about 16 carbon atoms.
Claim 13
Dependent Claim
50 words
The ink of claim 7, wherein: the organic solvent is selected from the group consisting of 1,5-pentanediol, 2-pyrrolidone, ethylhydroxy-propanediol, and a 1:1:1 mixture thereof; and the surfactant comprises at least one secondary alcohol ethoxylate surfactant predominantly having about 7 ethoxylated units and an aliphatic chain of about 15 carbon atoms.
Claim 14
Independent Claim
66 words
A method for printing ink-jet images having improved lightfastness using an ink-jet printer, comprising the steps of: providing an ink-jet ink comprising from about 1 to about 10 wt % dye having the formula ##STR4## wherein X is --CH 2 --CH 2 --O--H, or --CH═CH 2 , or mixtures thereof; and printing said ink-jet ink composition on a printing medium by means of an ink-jet pen.
Claim 15
Independent Claim
66 words
A method for printing ink-jet images having improved lightfastness using an ink-jet printer, comprising the steps of: providing an ink-jet ink comprising from about 1 to about 10 wt % dye having the formula ##STR4## wherein X is --CH 2 --CH 2 --O--H, or --CH═CH 2 , or mixtures thereof; and printing said ink-jet ink composition on a printing medium by means of an ink-jet pen.
Claim 16
Dependent Claim
20 words
The method of claim 1, wherein the concentration of said dye is from about 5 to about 10 wt %.
Claim 17
Dependent Claim
20 words
The method of claim 13, wherein the concentration of said dye is from about 7 to about 10 wt %.
Claim 18
Dependent Claim
17 words
The method of claim 13, wherein said ink contains less than about 1 wt % sulfate ion.
Claim 19
Dependent Claim
18 words
The method of claim 13, wherein said ink contains less than about 1000 parts per million sulfate ion.
Claim 20
Dependent Claim
18 words
The method of claim 13, wherein said ink contains less than about 100 parts per million sulfate ion.
Claim 21
Dependent Claim
46 words
The method of claim 13, wherein said ink further comprises: from about 10 to about 40 wt % of an organic solvent; and optionally up to about 5 wt % of an additive independently selected from the group consisting of surfactant, biocide, buffer, and mixtures thereof.
Claim 22
Dependent Claim
64 words
The method of claim 19, wherein: the organic solvent is present in an amount from about 15 to about 30 wt %; the surfactant is present in an amount from about 1 to about 4 wt %; the biocide is present in an amount up to about 1 wt %; and the buffer is present in an amount up to about 1 wt %.
Claim 23
Dependent Claim
62 words
The method of claim 19, wherein: the organic solvent is present in an amount from about 20 to about 25 wt %; the surfactant is present in an amount from about 2 to about 3 wt %; the biocide is present in an amount up to 0.2 wt %; and the buffer is present in an amount up to 0.5 wt %.
Claim 24
Dependent Claim
57 words
The method of claim 19, wherein: the organic solvent is selected from the group consisting of nitrogen-containing heterocyclic ketones, diols, glycols, and mixtures thereof; and the surfactant comprises at least one secondary alcohol ethoxylate surfactant predominantly having from about 4 to about 8 ethoxylated units and an aliphatic chain from about 12 to about 18 carbon atoms.
Claim 25
Dependent Claim
58 words
The method of claim 19, wherein: the organic solvent is selected from the group consisting of 1,5-pentanediol, 2-pyrrolidone, N-methyl-pyrrolid-2-one, ethylhydroxy-propanediol, diethylene glycol, and mixtures thereof; and the surfactant comprises at least one secondary alcohol ethoxylate surfactant predominantly having from about 5 to about 7 ethoxylated units and an aliphatic chain from about 14 to about 16 carbon atoms.
Claim 26
Dependent Claim
50 words
The method of claim 19, wherein: the organic solvent is selected from the group consisting of 1,5-pentanediol, 2-pyrrolidone, ethylhydroxy-propanediol, and a 1:1:1 mixture thereof; and the surfactant comprises at least one secondary alcohol ethoxylate surfactant predominantly having about 7 ethoxylated units and an aliphatic chain of about 15 carbon atoms.
Claim 27
Dependent Claim
54 words
An ink-jet ink composition for printing ink-jet images having improved lightfastness, comprising: a black ink for printing ink-jet images having an average lightfade of less than about 40%, said ink having a short term decap performance of greater than about 15 seconds and a nozzle recovery after storage performance of greater than about 30%.
Claim 28
Dependent Claim
54 words
An ink-jet ink composition for printing ink-jet images having improved lightfastness, comprising: a black ink for printing ink-jet images having an average lightfade of less than about 40%, said ink having a short term decap performance of greater than about 15 seconds and a nozzle recovery after storage performance of greater than about 30%.
Claim 29
Dependent Claim
32 words
The ink of claim 25, wherein: said ink has a short term decap performance of greater than about 25 seconds and a nozzle recovery after storage performance of greater than about 60%.
Claim 30
Dependent Claim
32 words
The ink of claim 25, wherein: said ink has a short term decap performance of greater than about 35 seconds and a nozzle recovery after storage performance of greater than about 90%.
Claim 31
Dependent Claim
17 words
The ink of claim 25, 26, or 27, wherein the average lightfade is less than about 30%.
Claim 32
Dependent Claim
17 words
The ink of claim 25, 26, or 27, wherein the average lightfade is less than about 20%.
Claim 33
Dependent Claim
41 words
The ink of claim 25, 26, or 27, wherein: said black ink comprises from about 1 to about 10 wt % dye having the formula ##STR5## wherein X is --CH 2 --CH 2 --O--H, or --CH═CH 2 _, or mixtures thereof.
Claim 34
Independent Claim
74 words
A method for printing ink-jet images having improved lightfastness using an ink-jet printer comprising the steps of: providing a black ink having a short term decap performance of greater than about 15 seconds and a nozzle recovery after storage performance of greater than about 30%; and printing an ink-jet image using said ink on a printing medium by means of an ink-jet pen, said image having an average lightfade of less than about 40%.
Claim 35
Independent Claim
74 words
A method for printing ink-jet images having improved lightfastness using an ink-jet printer comprising the steps of: providing a black ink having a short term decap performance of greater than about 15 seconds and a nozzle recovery after storage performance of greater than about 30%; and printing an ink-jet image using said ink on a printing medium by means of an ink-jet pen, said image having an average lightfade of less than about 40%.
Claim 36
Dependent Claim
32 words
The method of claim 31, wherein: said ink has a short term decap performance of greater than about 25 seconds and a nozzle recovery after storage performance of greater than about 60%.
Claim 37
Dependent Claim
32 words
The method of claim 31, wherein: said ink has a short term decap performance of greater than about 35 seconds and a nozzle recovery after storage performance of greater than about 90%.
Claim 38
Dependent Claim
45 words
The method of claim 31, wherein: said ink has a short term decap performance of greater than about 35 seconds and a nozzle recovery after storage performance of greater than about 90%; and the printed image has an average lightfade of less than about 30%.
Claim 39
Dependent Claim
45 words
The method of claim 31, wherein: said ink has a short term decap performance of greater than about 35 seconds and a nozzle recovery after storage performance of greater than about 90%; and the printed image has an average lightfade of less than about 20%.
Claim 40
Dependent Claim
40 words
The method of claim 31, 32, or 33, wherein: said ink comprises from about 1 to about 10 wt % dye having the formula ##STR6## wherein X is --CH 2 --CH 2 --O--H, or --CH═CH 2 , or mixtures thereof.
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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) | 2001-03-09 | 2001-09-08 | 2002-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-09 | 2005-09-08 | 2006-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-09 | 2009-09-08 | 2010-03-10 | $7700.00 | Window Closed / Lapsed |