US5098478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-based ink compositions
Assignee: Sun Chemical Corp
•
Filing: 1990-12-07
•
Granted: 1992-03-24
•
Expires: 2010-12-07
Abstract
Abstract Water-based ink compositions comprising water, a pigment, a nonionic surfactant having a solubility in water of less than about 0.5 wt. % and a solubilizing agent sufficient to solubilize substantially all of the nonionic surfactant.
Inventors
- 👤 Ramasamy Krishnan
- 👤 Robert W. Bassemir
- 👤 Timothy C. Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A water-based ink comprising: (a) water; (b) a pigment; (c) a nonionic surfactant having a solubility in water of less than about 0.5 wt. % and being present in an amount effective to lower the dynamic surface tension of the ink composition to a level in the range of about 25 to 40 dynes/cm; and (d) a solubilizing agent sufficient to solubilize substantially all of the nonionic surfactant, said solubilizing agent being selected from the group consisting of: (1) the ammonium, potassium or sodium salt of 8(5-Carboxy-4-Hexyl-Cyclohex-2-enyl)Octanoic Acid: (2) the ammonium, potassium or sodium salt of a C 8 -C 13 dialkyl sulfosuccinic acid having a critical micellar concentration in the range of about 0.08 to 0.12: (3) phosphate ester surfactants; and (4) mixtures thereof.
Claim 2
Dependent Claim
125 words
A water-based ink comprising: (a) water; (b) a pigment; (c) a nonionic surfactant having a solubility in water of less than about 0.5 wt. % and being present in an amount effective to lower the dynamic surface tension of the ink composition to a level in the range of about 25 to 40 dynes/cm; and (d) a solubilizing agent sufficient to solubilize substantially all of the nonionic surfactant, said solubilizing agent being selected from the group consisting of: (1) the ammonium, potassium or sodium salt of 8(5-Carboxy-4-Hexyl-Cyclohex-2-enyl)Octanoic Acid: (2) the ammonium, potassium or sodium salt of a C 8 -C 13 dialkyl sulfosuccinic acid having a critical micellar concentration in the range of about 0.08 to 0.12: (3) phosphate ester surfactants; and (4) mixtures thereof.
Claim 3
Dependent Claim
16 words
The ink composition of claim 1 having a dynamic surface tension of 25 to 30 dynes/cm.
Claim 4
Dependent Claim
22 words
The ink composition of claim 1 wherein the nonionic surfactant is present in an amount of about 1 to 4 wt. %.
Claim 5
Dependent Claim
69 words
The ink composition of claim 1 wherein the nonionic surfactant is selected from the group consisting of acetylenic diols containing 8 to 14 carbon atoms, acetylenic carbinols containing 8 to 14 carbon atoms and block copolymers of propylene oxide and ethylene oxide having an HLB Value in the range of about 3 to 8 and a propylene oxide to ethylene oxide ratio in the range of 8:1 to 3:1.
Claim 6
Dependent Claim
22 words
The ink composition of claim 1 wherein the solubilizing agent is present in an amount of about 0.1 to 5 wt. %.
Claim 7
Dependent Claim
21 words
The ink composition of claim 1 wherein the water is present in an amount of about 30 to 80 wt. %.
Claim 8
Dependent Claim
20 words
The ink composition of claim 1 wherein the pigment is present in amount of about 3 to 15 wt. %.
References Cited (Backward Citations)
US2868741A
Cited
US4137205A
Cited
US4184881A
Cited
US4854969A
Cited
US4986851A
Cited
US4910236A
Cited
US4954556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |