US4854969A
Expired / Lapsed
US
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Lithographic fountain solutions
Assignee: Sun Chemical Corp
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Filing: 1988-02-26
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Granted: 1989-08-08
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Expires: 2008-02-26
Abstract
Abstract Lithographic fountain solutions containing water, one or more nonionic surfactants having an HLB in the range of 1 to 8 and one or more hydrotropes to maintain the surfactant in solution without increasing the HLB of the fountain solution.
Inventors
- 👤 Robert Bassemir
- 👤 Ramasamy Krishnan
- 👤 Arthur I. Lowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
142 words
Lithographic fountain solution comprising: (a) water; (b) a nonionic surfactant having an HLB in the range of 1 to 8 selected from the group consisting of block copolymers of propylene oxide and ethylene oxide; block copolymers of propylene oxide, ethylene oxide and ethylenediamine; and C 1 -C 20 ethoxylated alcohols, amides, fatty acid esters, alkanol amides, glycol esters, ethoxylated alkyl phenols, ethoxylated acetylenic glycols, ethoxylated acetylenic carbinols, acetylenic glycols, acetylenic carbinols, silicone glycols, silicone alkylene oxide copolymers and mixtures thereof; and (c) a hydrotrope selected from the group consisting of sodium toluene sulfonate, sodium xylene sulfonate, sodium cumene sulfonate, sodium terpene sulfonates, ammonium toluene sulfonate, ammonium xylene sulfonate, ammonium cumene sulfonate, tetrabutyl ammonium hydrogen sulfate, tetraphenyl phosphonium bromide, tetrabutyl ammonium bromide, sodium thiocyanate and mixtures thereof, the ratio of hydrotrope to surfactant being in the range of about 1:1 to about 10:1.
Claim 2
Dependent Claim
142 words
Lithographic fountain solution comprising: (a) water; (b) a nonionic surfactant having an HLB in the range of 1 to 8 selected from the group consisting of block copolymers of propylene oxide and ethylene oxide; block copolymers of propylene oxide, ethylene oxide and ethylenediamine; and C 1 -C 20 ethoxylated alcohols, amides, fatty acid esters, alkanol amides, glycol esters, ethoxylated alkyl phenols, ethoxylated acetylenic glycols, ethoxylated acetylenic carbinols, acetylenic glycols, acetylenic carbinols, silicone glycols, silicone alkylene oxide copolymers and mixtures thereof; and (c) a hydrotrope selected from the group consisting of sodium toluene sulfonate, sodium xylene sulfonate, sodium cumene sulfonate, sodium terpene sulfonates, ammonium toluene sulfonate, ammonium xylene sulfonate, ammonium cumene sulfonate, tetrabutyl ammonium hydrogen sulfate, tetraphenyl phosphonium bromide, tetrabutyl ammonium bromide, sodium thiocyanate and mixtures thereof, the ratio of hydrotrope to surfactant being in the range of about 1:1 to about 10:1.
Claim 3
Dependent Claim
17 words
The fountain solution of claim 1 wherein the surfactant is a C 8 -C 16 acetylenic glycol.
Claim 4
Dependent Claim
17 words
The fountain solution of claim 1 wherein the surfactant is a C 5 -C 12 acetylenic carbinol.
Claim 5
Dependent Claim
18 words
The fountain solution of claim 1 wherein the surfactant is an ethoxylated C 8 -C 16 acetylenic glycol.
Claim 6
Dependent Claim
18 words
The fountain solution of claim 1 wherein the surfactant is an ethoxylated C 5 -C 12 acetylenic carbinol.
Claim 7
Dependent Claim
19 words
The fountain solution of claim 1 wherein the surfactant has an HLB in the range of 3 to 5.
Claim 8
Dependent Claim
13 words
The fountain solution of claim 1 wherein the hydrotrope is sodium toluene sulfonate.
Claim 9
Dependent Claim
13 words
The fountain solution of claim 1 wherein the hydrotrope is sodium xylene sulfonate.
Claim 10
Dependent Claim
13 words
The fountain solution of claim 1 wherein the hydrotrope is sodium cumene sulfonate.
Claim 11
Dependent Claim
13 words
The fountain solution of claim 1 wherein the hydrotrope is ammonium xylene sulfonate.
Claim 12
Dependent Claim
23 words
The fountain solution of claim 1 wherein the ratio of hydrotrope to surfactant is within the range of 4:1 to 6:1 by weight.
Claim 13
Dependent Claim
33 words
The fountain solution of claim 1 further comprising an alcohol replacement selected from the group consisting of 2-butoxy ethanol, n-hexoxyethanol, ethylene glycol, 2-ethyl-1,3-hexane diol, 1-methoxy-2-propanol, 1-propoxy-2-propanol, 1-butoxy-2-propanol, dipropyleneglycol methyl ether and mixtures thereof.
Claim 14
Dependent Claim
25 words
The fountain solution of claim 1 further comprising less than 10 vol. % of isopropanol, based on the volume of water present in the solution.
Claim 15
Dependent Claim
44 words
The fountain solution of claim 1 further comprising a buffering salt selected from the group consisting of disodium hydrogen phosphate, dipotassium hydrogen phosphate, sodium hydrogen phthalate, potassium hydrogen phthalate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, sodium acetate, sodium citrate, sodium glycolate and mixtures thereof.
Claim 16
Dependent Claim
31 words
The fountain solution of claim 1 further comprising a water soluble gum selected from the group consisting of gum arabic, gum tragacanth, guar gum, karaya gum, cellulose gum and polyvinyl pyrrolidone.
Claim 17
Dependent Claim
33 words
The fountain solution of claim 1 further comprising an acid selected from the group consisting of phosphoric acid, acetic acid, nitric acid, phthalic acid, citric acid, sulfuric acid, glycolic acid and mixtures thereof.
Claim 18
Dependent Claim
10 words
The fountain solution of claim 1 further comprising a biocide.
Claim 19
Dependent Claim
26 words
The fountain solution of claim 1 further comprising an oxidizing salt selected from the group consisting of magnesium nitrate, zinc nitrate, aluminum nitrate and mixtures thereof.
References Cited (Backward Citations)
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |