Patent US2586553A successfully refreshed from Google Patents.
US5656071A
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US
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Ink compositions
Assignee: Funai Electric Co Ltd
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Filing: 1996-06-20
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Granted: 1997-08-12
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Expires: 2016-06-20
Abstract
Abstract The invention relates to an aqueous ink composition for use in ink jet printers comprising an aqueous carrier, an insoluble pigment, a polymeric dispersant, and a specific cosolvent mixture comprising 1,3-propanediol or 1,4-butanediol with a second component selected from polyethylene glycol-type materials and polyol/alkylene oxide condensates. The ink compositions demonstrate excellent stability, good maintenance characteristics for the printers in which they are used, and excellent optical density and print characteristics.
Inventors
- 👤 William David Kappele
- 👤 Anna Marie Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:55
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; C09D11/38
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
174 words
An aqueous ink composition suitable for use in ink jet printers comprising: (a) from about 1% to about 10% by weight of a pigment; (b) from about 0.1% to about 10% by weight of a polymeric dispersant for said pigment; (c) from about 50% to about 93% by weight of an aqueous carrier; and (d) from about 5% to about 40% by weight of a cosolvent mixture comprising (1) 1,3-propanediol or 1,4-butanediol; and (2) a material selected from the group consisting of: (i) polyethylene glycols, and mixed poly(ethylene) (propylene) glycols, having a molecular weight of from about 200 to about 3,400; (ii) a polyol/polyalkylene oxide condensate having the formula ##STR11## wherein X is H or CH 3 , R is H, C 1 -C 4 alkyl or CH 2 O(CH 2 CH 2 O) e H, b is 0 or 1, a+d+f (c+e) is from 2 to about 100, and f is from about 1 to about 6; and (iii) mixtures thereof; wherein the weight ratio (1):(2) is from about 70:30 to about 30:70.
Claim 2
Dependent Claim
174 words
An aqueous ink composition suitable for use in ink jet printers comprising: (a) from about 1% to about 10% by weight of a pigment; (b) from about 0.1% to about 10% by weight of a polymeric dispersant for said pigment; (c) from about 50% to about 93% by weight of an aqueous carrier; and (d) from about 5% to about 40% by weight of a cosolvent mixture comprising (1) 1,3-propanediol or 1,4-butanediol; and (2) a material selected from the group consisting of: (i) polyethylene glycols, and mixed poly(ethylene) (propylene) glycols, having a molecular weight of from about 200 to about 3,400; (ii) a polyol/polyalkylene oxide condensate having the formula ##STR11## wherein X is H or CH 3 , R is H, C 1 -C 4 alkyl or CH 2 O(CH 2 CH 2 O) e H, b is 0 or 1, a+d+f (c+e) is from 2 to about 100, and f is from about 1 to about 6; and (iii) mixtures thereof; wherein the weight ratio (1):(2) is from about 70:30 to about 30:70.
Claim 3
Dependent Claim
66 words
An ink composition according to claim 1 wherein the cosolvent mixture comprises (1) 1,3-propanediol or 1,4-butanediol; and (2) a material selected from the group consisting of (i) polyethylene glycol having molecular weight of from about 200 to about 3,400; (ii) the polyol/alkylene oxide condensate wherein X is hydrogen, R is hydrogen, b is 0, f is 1, and a+d+f (c+e) is 26; and (iii) mixtures thereof.
Claim 4
Dependent Claim
21 words
An ink composition according to claim 2 which contains from about 10% to about 20% by weight of said cosolvent mixture.
Claim 5
Dependent Claim
27 words
An ink composition according to claim 3 wherein, in the cosolvent mixture, the polyethylene glycol component (i) is polyethylene glycol having a molecular weight of about 400.
Claim 6
Dependent Claim
26 words
An ink composition according to claim 4 wherein the cosolvent mixture is a mixture of 1,3-propanediol and polyethylene glycol having a molecular weight of about 400.
Claim 7
Dependent Claim
15 words
An ink composition according to claim 4 wherein the weight ratio (1):(2) is about 50:50.
Claim 8
Dependent Claim
172 words
An ink composition according to claim 1 wherein the polymeric dispersant comprises in its backbone structural units selected from the group consisting of ##STR12## where x+y is from about 20 to about 200, z is from about 1 to about 10, and R is C 6 -C 36 alkyl or ##STR13## where R 1 is a C 4 -C 20 alkyl; ##STR14## where x+y is from about 20 to about 200, z is from about 1 to about 10, n is from about 2 to about 40 and R 2 is alkyl or aryl; and ##STR15## where x+y is from about 20 to about 200, z is from about 1 to about 10, R 3 is H or CH 3 , R 4 is H, CH 3 or OCH 3 , and n is from about 10 to about 60; or has the formula ##STR16## where y is from about 6 to about 20, x is from about 1 to about 5, and R 5 is a C 6 -C 30 alkyl.
Claim 9
Dependent Claim
81 words
An ink composition according to claim 7 wherein the aqueous carrier is water or a mixture of water and an organic solvent selected from the group consisting of ethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexylene glycol, diethylene glycol, pentanediol, hexanediol, propylene glycol laurate, glycerol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, methanol, ethanol, propanol, butanol, acetone, tetrahydrafuran dioxane, ethyl acetate, sulfolanes, lactones, lactams and mixtures thereof.
Claim 10
Dependent Claim
26 words
An ink composition according to claim 8 wherein the pigment is selected from the group consisting of carbon black, titanium dioxide, iron oxide and color pigments.
Claim 11
Dependent Claim
21 words
An ink composition according to claim 9 which contains from about 0.5% to about 4% by weight of the insoluble pigment.
Claim 12
Dependent Claim
86 words
An ink composition according to claim 9 wherein the polymeric dispersant is a graft copolymer, having a molecular weight of from about 1,500 to about 20,000, comprising: (a) a hydrophilic polymeric segment; (b) a hydrophobic polymeric segment, having a molecular weight of from about 400 to about 3,000, which incorporates a hydrolytically stable siloxyl substituent; and (c) a stabilizing segment having a molecular weight of from 200 to about 2,000, selected from the group consisting of reactive surfactant macromers, protective colloid macromers, and non-siloxyl hydrophobic monomers.
Claim 13
Dependent Claim
74 words
An ink composition according to claim 11 wherein the polymeric dispersant comprises in its backbone the formula ##STR17## wherein x is from about 5 to about 100, y is from about 1 to about 2, z is from about 1 to about 5, a is from about 3 to about 45, b is from about 3 to about 29, c is from about 2 to 8, and d is from 0 to about 7.
Claim 14
Dependent Claim
68 words
An ink composition according to claim 11 wherein the cosolvent mixture comprises: (1) 1,3-propanediol or 1,4 butanediol; and (2) a material selected from the group consisting of: (i) polyethylene glycol having a molecular weight of from about 200 to about 3,400; (ii) a polyol/alkylene oxide condensate wherein X is hydrogen, R is hydrogen, b is 0, f is 1, and a+d+f (c+e) is 26; and (iii) mixtures thereof.
Claim 15
Dependent Claim
21 words
An ink composition according to claim 13 which contains from about 10% to about 20% by weight of the cosolvent mixture.
Claim 16
Dependent Claim
61 words
An ink composition according to claim 14 wherein the cosolvent mixture comprises: (1) 1,3-propanediol; and (2) a material selected from the group consisting of: (i) polyethylene glycol having a molecular weight of about 400; (ii) a polyol/alkylene oxide condensate wherein X is hydrogen, R is hydrogen, b is 0, f is 1, and a+d+f (c+e) is 26; and (iii) mixtures thereof.
Claim 17
Dependent Claim
15 words
An ink composition according to claim 15 wherein the weight ratio (1):(2) is about 50:50.
Claim 18
Dependent Claim
58 words
An ink composition according to claim 16 wherein the aqueous carrier is water or a mixture of water with an organic solvent selected from the group consisting of 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, n-propanol and mixtures thereof, wherein the aqueous carrier comprises from about 50% water/50% organic solvent to about 99.9% water/0.1% organic solvent and all percents are by weight.
Claim 19
Dependent Claim
111 words
A cosolvent mixture comprising: (1) 1,3-propanediol or 1,4-butanediol; and (2) a material selected from the group consisting of: (i) polyethylene glycols, and mixed poly(ethylene) (propylene) glycols, having a molecular weight of from about 200 to about 3,400; (ii) a polyol/polyalkylene oxide condensate having the formula ##STR18## wherein X is H or CH 3 , R is H,C 1 -C 4 alkyl or CH 2 O (CH 2 CH 2 O) e H, b is 0 or 1, a+d+f (c+e) is from about 2 to about 100, and f is from about 1 to about 6; and (iii) mixtures thereof; wherein the weight ratio (1):(2) is from about 70:30 to about 30:70.
Claim 20
Dependent Claim
111 words
A cosolvent mixture comprising: (1) 1,3-propanediol or 1,4-butanediol; and (2) a material selected from the group consisting of: (i) polyethylene glycols, and mixed poly(ethylene) (propylene) glycols, having a molecular weight of from about 200 to about 3,400; (ii) a polyol/polyalkylene oxide condensate having the formula ##STR18## wherein X is H or CH 3 , R is H,C 1 -C 4 alkyl or CH 2 O (CH 2 CH 2 O) e H, b is 0 or 1, a+d+f (c+e) is from about 2 to about 100, and f is from about 1 to about 6; and (iii) mixtures thereof; wherein the weight ratio (1):(2) is from about 70:30 to about 30:70.
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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) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |