US5169436A
Expired / Lapsed
US
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Sulfur-containing penetrants for ink jet inks
Assignee: EIDP Inc
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Filing: 1992-05-13
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Granted: 1992-12-08
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Expires: 2012-05-13
Abstract
Abstract Aqueous ink jet ink compositions comprising an aqueous carrier medium, a colorant and a sulfoxide or sulfone penetrant having a solubility in water of at least 4.5% at 25 DEG C. and represented by the formula: H(CH2)aS(O)n(CH2)bH wherein a+b=5-8, and n=1-2; exhibit rapid drying, excellent image definition, are storage stable and have excellent decap properties.
Inventors
- 👤 Howard Matrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
An aqueous ink jet ink composition comprising: (a) an aqueous carrier medium, (b) a colorant; and (c) a sulfoxide or sulfone penetrant having a solubility in water of at least 4.5% at 25° C., and which is represented by the formula: H(CH.sub.2).sub.a S(O).sub.n (CH.sub.2).sub.b H wherein a+b=5-8, and n=1-2.
Claim 2
Dependent Claim
49 words
An aqueous ink jet ink composition comprising: (a) an aqueous carrier medium, (b) a colorant; and (c) a sulfoxide or sulfone penetrant having a solubility in water of at least 4.5% at 25° C., and which is represented by the formula: H(CH.sub.2).sub.a S(O).sub.n (CH.sub.2).sub.b H wherein a+b=5-8, and n=1-2.
Claim 3
Dependent Claim
15 words
The ink composition of claim 1 wherein the colorant comprises a pigment and a dispersant.
Claim 4
Dependent Claim
13 words
The ink composition of claim 2 wherein the dispersant is a polymeric dispersant.
Claim 5
Dependent Claim
10 words
The ink composition of claim 1 wherein a+b=7 and n=1-2.
Claim 6
Dependent Claim
10 words
The ink composition of claim 1 wherein a+b=6 and n=1-2.
Claim 7
Dependent Claim
8 words
The ink composition of claim 1 wherein n=1.
Claim 8
Dependent Claim
8 words
The ink composition of claim 1 wherein n=2.
Claim 9
Dependent Claim
12 words
The ink composition of claim 1 wherein the penetrant is di-n-propyl sulfoxide.
Claim 10
Dependent Claim
12 words
The ink composition of claim 1 wherein the penetrant is di-n-propyl sulfone.
Claim 11
Dependent Claim
12 words
The ink composition of claim 1 wherein the penetrant is ethyl-n-propyl sulfone.
Claim 12
Dependent Claim
12 words
The ink composition of claim 1 wherein the penetrant is n-butyl-n-propyl sulfone.
Claim 13
Dependent Claim
22 words
The ink composition of claim 2 wherein the pigment comprises particles having a median particle size of approximately 0.01 to 0.3 micron.
Claim 14
Dependent Claim
51 words
The ink composition of claim 3 wherein said polymeric dispersant comprises a block copolymer and wherein the ink composition comprises approximately 0.1 to 8% pigment, 0.1 to 8% block copolymer, and 94 to 99.8% aqueous carrier medium plus sulfoxide or sulfone penetrant based upon the total weight of the ink composition.
Claim 15
Dependent Claim
21 words
The ink composition of claim 1 wherein the aqueous carrier medium comprises water and at least one water soluble organic solvent.
Claim 16
Dependent Claim
32 words
The ink composition of claim 14 wherein the aqueous carrier medium comprises from 30% to 95% water based on the total weight of the aqueous carrier medium plus sulfoxide or sulfone penetrant.
Claim 17
Dependent Claim
44 words
The ink composition of claim 1 wherein said colorant is a dye and wherein said ink composition comprises approximately 0.2 to 20% dye, and 80 to 99.8% aqueous carrier medium plus sulfoxide or sulfone penetrant, based on the total weight of the ink composition.
Claim 18
Dependent Claim
30 words
The ink composition of claim 1 wherein the aqueous carrier medium is a mixture of water and at least one water soluble organic solvent having at least 2 hydroxyl groups.
Claim 19
Dependent Claim
32 words
The ink composition of claim 1 wherein said ink composition has a surface tension of approximately 20 to 70 dyne/cm and a viscosity of no greater than 20 cP at 20° C.
Claim 20
Dependent Claim
11 words
The ink composition of claim 1, wherein a surfactant is present.
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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) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |