Patent US4959661A successfully refreshed from Google Patents.
US4959661A
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Ink-jet printing process
Assignee: Olin Hunt Sub I Corp
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Filing: 1989-09-28
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Granted: 1990-09-25
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Expires: 2009-09-28
Abstract
Abstract A process for applying an ink-jet printing ink comprising the steps of: (a) preparing an aqueous Newtonian dispersion containing acidic or neutral carbon black or pigments and a surfactant; (b) removing all aggregates larger than 5 microns; and (c) ink-jet printing said dispersion onto a receptor substrate.
Inventors
- 👤 Galina P. Buxton
- 👤 Harshad M. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:40
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; C09D17/00; C09D17/004; C09D17/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
A process for applying an ink-jet printing ink comprising the steps of: (a) preparing an aqueous Newtonian dispersion containing: (1) about 0.01% to about 5.0% by weight, based on the weight of the dispersion of particulate materials selected from the group consisting of an acidic or neutral carbon black and pigments, said particulate material, having an average particle size of less than about 3.0 microns in said dispersion; (2) an effective dispersing amount of an anionic, cationic, or nonionic surfactant which is compatible with said carbon black or pigment; and said dispersion having a surface tension of greater than 35 mN/m and a viscosity in the range of 1-10 mNS/m 2 and a pH of 8 to 11; (b) removing all aggregates larger than 5 microns; and (c) ink-jet printing said dispersion onto a receptor substrate.
Claim 2
Dependent Claim
136 words
A process for applying an ink-jet printing ink comprising the steps of: (a) preparing an aqueous Newtonian dispersion containing: (1) about 0.01% to about 5.0% by weight, based on the weight of the dispersion of particulate materials selected from the group consisting of an acidic or neutral carbon black and pigments, said particulate material, having an average particle size of less than about 3.0 microns in said dispersion; (2) an effective dispersing amount of an anionic, cationic, or nonionic surfactant which is compatible with said carbon black or pigment; and said dispersion having a surface tension of greater than 35 mN/m and a viscosity in the range of 1-10 mNS/m 2 and a pH of 8 to 11; (b) removing all aggregates larger than 5 microns; and (c) ink-jet printing said dispersion onto a receptor substrate.
Claim 3
Dependent Claim
50 words
The process of claim 1 wherein said preparation step is carried out by subjecting a dispersion concentrate to a mixing step comprising ball milling, colloidal milling, high-shear milling, or ultrasonic mixing followed by dilution of said dispersion concentrate with more water while agitating said dispersion from the desired dispersion concentration.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein said particulate material has an average particle diameter from about 0.01 to about 2.0 microns.
Claim 5
Dependent Claim
42 words
The process of claim 1 wherein said removing step (b) is carried out by either centrifuging out said agglomerates from said dispersion, filtering said dispersion through a 5.0 micron filter to filter out said agglomerates, or a combination of centrifuging and filtering.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein said particulate materials in said dispersion is an acidic or neutral carbon black having a pH from about 1 to about 7.5.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein said surfactant is an anionic surfactant having a HLB number from 8 to 18.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein said dispersion further contains a sufficient amount of a mild base to adjust the pH of said dispersion to about 8 to about 11.
Claim 9
Dependent Claim
21 words
The process of claim 7 wherein said mild base is selected from the group consisting of N-methyldiethanolamine, diethanolamine, and mixtures thereof.
Claim 10
Dependent Claim
21 words
The process of claim 1 wherein the amount of said particulate matter is less than 4.590 by weight of said dispersion.
Claim 11
Dependent Claim
26 words
The process of claim 1 wherein the said dispersion further contains a humectant in the amount from about 0.1% to 55% by weight of said dispersion.
Claim 12
Dependent Claim
27 words
The process of claim 10 wherein said humectant is selected from the group consisting of ethylene glycol, diethylene glycol, polyethylene glycol, and 5,5-dimethylhydantoin formaldehyde or mixtures thereof.
Claim 13
Dependent Claim
52 words
The process of claim 1 wherein said dispersion comprises the following ingredients: (i) about 1.5% to about 4.5% by weight acidic or neutral carbon black or pigment; (ii) about 0.05% to about 2% by weight anionic surfactant; (iii) about 0.4% to about 0.8% by weight mild base; and (iv) the balance water.
Claim 14
Dependent Claim
22 words
The process of claim 12 wherein said dispersion further contains the following ingredient: (v) about 0.1% to about 55% by weight humectant.
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |