US5302195A
Expired / Lapsed
US
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Ink compositions containing cyclodextrins
Assignee: Xerox Corp
•
Filing: 1991-05-22
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Granted: 1994-04-12
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Expires: 2011-05-22
Abstract
Abstract Disclosed is an ink composition which comprises an aqueous liquid vehicle, a dye, and a cyclodextrin. The ink is particularly suitable for ink jet printing processes, especially thermal ink jet printing processes. Also disclosed is a process for generating images onto a substrate which comprises incorporating an ink composition comprising an aqueous liquid vehicle, a dye, and a cyclodextrin into an ink jet printing apparatus and causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate.
Inventors
- 👤 Barbel Helbrecht
- 👤 Marcel P. Breton
- 👤 Kerstin M. Henseleit
- 👤 Melvin D. Croucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
77 words
An ink composition which comprises an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a cyclodextrin in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle, wherein the concentration by weight of the cyclodextrin in the ink is equal to two thirds or less of the concentration by weight of the dye in the ink.
Claim 2
Dependent Claim
77 words
An ink composition which comprises an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a cyclodextrin in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle, wherein the concentration by weight of the cyclodextrin in the ink is equal to two thirds or less of the concentration by weight of the dye in the ink.
Claim 3
Dependent Claim
25 words
An ink composition according to claim 1 wherein the cyclodextrin is present in an amount of from about 1 to about 9 percent by weight.
Claim 4
Dependent Claim
25 words
An ink composition according to claim 1 wherein the cyclodextrin is present in an amount of from about 2 to about 5 percent by weight.
Claim 5
Dependent Claim
12 words
An ink composition according to claim 1 wherein the cyclodextrin is beta-cyclodextrin.
Claim 6
Dependent Claim
12 words
An ink composition according to claim 1 wherein the cyclodextrin is alpha-cyclodextrin.
Claim 7
Dependent Claim
12 words
An ink composition according to claim 1 wherein the cyclodextrin is gamma-cyclodextrin.
Claim 8
Dependent Claim
15 words
An ink composition according to claim 1 wherein the dye is an oil soluble dye.
Claim 9
Dependent Claim
15 words
An ink composition according to claim 1 wherein the dye is an alcohol soluble dye.
Claim 10
Dependent Claim
26 words
An ink composition according to claim 1 wherein the dye is selected from the group consisting of Orasol Blue 2GLN, Savinyl Blue GLS, and mixtures thereof.
Claim 11
Dependent Claim
25 words
An ink composition according to claim 1 wherein the dye is present in an amount of from about 0.5 to about 10 percent by weight.
Claim 12
Dependent Claim
26 words
An ink composition according to claim 1 wherein the dye and the cyclodextrin form complex particles with an average diameter of less than about 250 nanometers.
Claim 13
Dependent Claim
26 words
An ink composition according to claim 1 wherein the dye and the cyclodextrin form complex particles with an average diameter of less than about 200 nanometers.
Claim 14
Dependent Claim
110 words
A process for generating images onto a substrate which comprises incorporating an ink composition comprising an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a cyclodextrin in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle into an ink jet printing apparatus and causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate, wherein the concentration by weight of the cyclodextrin in the ink is equal to two thirds or less of the concentration by weight of the dye in the ink.
Claim 15
Dependent Claim
110 words
A process for generating images onto a substrate which comprises incorporating an ink composition comprising an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a cyclodextrin in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle into an ink jet printing apparatus and causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate, wherein the concentration by weight of the cyclodextrin in the ink is equal to two thirds or less of the concentration by weight of the dye in the ink.
Claim 16
Dependent Claim
24 words
A process according to claim 13 wherein the cyclodextrin is present in an amount of from about 1 to about 9 percent by weight.
Claim 17
Dependent Claim
24 words
A process according to claim 13 wherein the cyclodextrin is present in an amount of from about 2 to about 5 percent by weight.
Claim 18
Dependent Claim
11 words
A process according to claim 13 wherein the cyclodextrin is beta-cyclodextrin.
Claim 19
Dependent Claim
11 words
A process according to claim 13 wherein the cyclodextrin is alpha-cyclodextrin.
Claim 20
Dependent Claim
11 words
A process according to claim 13 wherein the cyclodextrin is gamma-cyclodextrin.
Claim 21
Dependent Claim
14 words
A process according to claim 13 wherein the dye is an oil soluble dye.
Claim 22
Dependent Claim
14 words
A process according to claim 13 wherein the dye is an alcohol soluble dye.
Claim 23
Dependent Claim
25 words
A process according to claim 13 wherein the dye is selected from the group consisting of Orasol Blue 2GLN, Savinyl Blue GLS, and mixtures thereof.
Claim 24
Dependent Claim
24 words
A process according to claim 13 wherein the dye is present in an amount of from about 0.5 to about 10 percent by weight.
Claim 25
Dependent Claim
25 words
A process according to claim 13 wherein the dye and the cyclodextrin form complex particles with an average diameter of less than about 250 nanometers.
Claim 26
Dependent Claim
25 words
A process according to claim 13 wherein the dye and the cyclodextrin form complex particles with an average diameter of less than about 200 nanometers.
Claim 27
Dependent Claim
33 words
A process according to claim 13 wherein the ink jet printing apparatus employs a thermal ink jet printing process and droplets of ink are caused to be ejected by selectively heating the ink.
Claim 28
Dependent Claim
59 words
An ink composition which comprises an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a material selected from the group consisting of substituted cyclodextrins and polymeric cyclodextrins in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle.
Claim 29
Dependent Claim
59 words
An ink composition which comprises an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a material selected from the group consisting of substituted cyclodextrins and polymeric cyclodextrins in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle.
Claim 30
Dependent Claim
82 words
An ink composition according to claim 26 wherein the substituents on the cyclodextrin are selected from the group consisting of acyl groups, alkyl groups, aryl groups, tosyl groups, mesyl groups, amino groups, azido groups, halo atoms, nitro groups, phosphorus-containing groups, imidazole groups, imidazole derivative groups, pyridine groups, pyridine derivative groups, sulfur-containing groups, alcohol groups, aldehyde groups, ketone groups, oxime groups, carboxylic acid groups, carboxylic acid derivative groups, carbonate groups, carbamate groups, silicon containing groups, boron containing groups, tin containing groups, hydroxyalkyl groups.
Claim 31
Dependent Claim
208 words
An ink composition according to claim 27 wherein the substituents are selected from the group consisting of --OAc, --OC(O)CH 2 CH 3 , --OC(O)(CH 2 ) 2 CH 3 , --OC(O)(CH 2 ) 3 CH 3 , --OC(O)CF 3 , --OC(O)Ph, --OCH 3 , --OCH 2 CH 3 , --O(CH 2 ) 2 CH 3 , --OC(CH 3 ) 3 , --OPh, --OTs, --OMs, --N 3 , --F, --Cl, --Br, --I, --ONO 2 , --OPO 3 H 2 , --OPO 3 R 2 (wherein R is alkyl or aryl), --OPO 3 HR (wherein R is alkyl or aryl), --OP(O)(CH 3 )O--, --SCH 3 , --SCH 2 CH 3 , --S(CH 2 ) 2 CH 3 , --SC(CH 3 ) 3 , --OSO 3 - Na + , --OCH 2 SO 3 - Na + , --OCH 2 CH 2 SO 3 - Na + , --O(CH 2 ) 3 SO 3 - Na + , -- OSi(CH 3 ) 3 , --OSi(CH 3 ) 2 H, --CH 2 OSi(CH 3 ) 3 , --CH 2 OSi(CH 3 ) 2 H, --OB(CH 2 CH 2 ) 2 , --CH 2 OB(CH 2 CH 2 ) 2 , and --CH 2 OSn((CH 2 ) 3 CH 3 ) 3 .
Claim 32
Dependent Claim
22 words
An ink composition according to claim 27 wherein the substituents are selected from the group consisting of hydroxyethyl groups and hydroxypropyl groups.
Claim 33
Dependent Claim
15 words
An ink composition according to claim 26 wherein the polymeric cyclodextrin is crosslinked with epichlorohydrin.
Claim 34
Dependent Claim
38 words
An ink composition according to claim 26 wherein the concentration by weight of the substituted cyclodextrin or polymeric cyclodextrin in the ink is equal to or less than the concentration by weight of the dye in the ink.
Claim 35
Dependent Claim
92 words
A process for generating images onto a substrate which comprises incorporating an ink composition comprising an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a material selected from the group consisting of substituted cyclodextrins and polymeric cyclodextrins in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle into an ink jet printing apparatus and causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate.
Claim 36
Dependent Claim
92 words
A process for generating images onto a substrate which comprises incorporating an ink composition comprising an aqueous liquid vehicle, a dye which exhibits a water solubility of less than about 1 gram of dye per liter of water, and a material selected from the group consisting of substituted cyclodextrins and polymeric cyclodextrins in an effective amount to enable a stable dispersion of the dye in the aqueous liquid vehicle into an ink jet printing apparatus and causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate.
Claim 37
Dependent Claim
81 words
A process according to claim 32 wherein the substituents on the cyclodextrin are selected from the group consisting of acyl groups, alkyl groups, aryl groups, tosyl groups, mesyl groups, amino groups, azido groups, halo atoms, nitro groups, phosphorus-containing groups, imidazole groups, imidazole derivative groups, pyridine groups, pyridine derivative groups, sulfur-containing groups, alcohol groups, aldehyde groups, ketone groups, oxime groups, carboxylic acid groups, carboxylic acid derivative groups, carbonate groups, carbamate groups, silicon containing groups, boron containing groups, tin containing groups, hydroxyalkyl groups.
Claim 38
Dependent Claim
206 words
A process according to claim 33 wherein the substituents are selected from the group consisting of --OAc, --OC(O)CH 2 CH 3 , --OC(O)(CH 2 ) 2 CH 3 , --OC(O)(CH 2 ) 3 CH 3 , --OC(O)CF 3 , --OC(O)Ph, --OCH 3 , --OCH 2 CH 3 , --O(CH 2 ) 2 CH 3 , --OC(CH 3 ) 3 , --OPh, --OTs, --OMs, --N 3 , --F, --Cl, --Br, --I, --ONO 2 , --OPO 3 H 2 , --OPO 3 R 2 (wherein R is alkyl or aryl), --OPO 3 HR (wherein R is alkyl or aryl), --OP(O)(CH 3 )O--, --SCH 3 , --SCH 2 CH 3 , --S(CH 2 ) 2 CH 3 , --SC(CH 3 ) 3 , --OSO 3 - Na + , --OCH 2 SO 3 - Na + , --OCH 2 CH 2 SO 3 - Na + , --O(CH 2 ) 3 SO 3 - Na + , --OSi(CH 3 ) 3 , --OSi(CH 3 ) 2 H, --CH 2 OSi(CH 3 ) 3 , --CH 2 OSi(CH 3 ) 2 H, --OB(CH 2 CH 2 ) 2 , --CH 2 OB(CH 2 CH 2 ) 2 , and --CH 2 OSn((CH 2 ) 3 CH 3 ) 3 .
Claim 39
Dependent Claim
21 words
A process according to claim 33 wherein the substituents are selected from the group consisting of hydroxyethyl groups and hydroxypropyl groups.
Claim 40
Dependent Claim
14 words
A process according to claim 32 wherein the polymeric cyclodextrin is crosslinked with epichlorohydrin.
Claim 41
Dependent Claim
37 words
A process according to claim 32 wherein the concentration by weight of the substituted cyclodextrin or polymeric cyclodextrin in the ink is equal to or less than the concentration by weight of the dye in the ink.
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