Ink composition comprising cationic, water-soluble resin
First Claim
1. An ink composition consisting essentially of an alkali-soluble colorant, a water-soluble organic solvent, water, a cationic, water-soluble resin, a base which is hydroxide of an alkali metal or an alkaline earth metal and, optionally, one or more of a nonionic water-soluble resin and an assistant selected from the group consisting of a penetration accelerator, a viscosity modifier, a surface tension modifier, a hydrotropy agent, a humectant, a pH adjustor, an antimold, a chelating agent, a preservative and a rust preventive;
- the cationic, water-soluble resin consisting of repeating units represented by the following formula (I);
wherein R1 and R2 which may be the same or different represent C1-5 alkyl group, andn is 0, 1, or 2.
1 Assignment
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Accused Products
Abstract
A composition, for ink jet recording, containing a cationic, water-soluble resin comprising a repeating unit represented by the following formula (I) can realize an image possessing excellent waterproofness and lightfastness and having no significant feathering or bleeding, especially no significant color-to-color bleeding:
wherein R1 and R2 which may be the same or different represent a hydrogen atom or a C1-5 alkyl group, provided that R1 and R2 do not simultaneously represent a hydrogen atom; and n is 0, 1, or 2.
61 Citations
46 Claims
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1. An ink composition consisting essentially of an alkali-soluble colorant, a water-soluble organic solvent, water, a cationic, water-soluble resin, a base which is hydroxide of an alkali metal or an alkaline earth metal and, optionally, one or more of a nonionic water-soluble resin and an assistant selected from the group consisting of a penetration accelerator, a viscosity modifier, a surface tension modifier, a hydrotropy agent, a humectant, a pH adjustor, an antimold, a chelating agent, a preservative and a rust preventive;
- the cationic, water-soluble resin consisting of repeating units represented by the following formula (I);
wherein R1 and R2 which may be the same or different represent C1-5 alkyl group, and n is 0, 1, or 2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
the first ink composition being the ink composition according to claim 1, the second ink composition being an ink composition comprising an anionic material. -
11. The ink set according to claim 10, wherein the group of first ink compositions comprises a yellow ink, a magenta ink, and a cyan ink and
the second ink composition is a black ink. -
12. The ink set according to claim 10, wherein the first ink composition is a black ink and the second group of ink compositions comprises a yellow ink, a magenta ink, and a cyan ink.
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13. The ink set according to claim 10, wherein the anionic material contained in the second ink composition is an anionic, water-soluble resin.
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14. The ink set according to claim 13, wherein the second ink composition comprises a pigment.
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15. The ink set according to claim 10, wherein the anionic material in the second ink composition is a pigment having an anionic functional group on its surface.
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16. A recording method comprising the step of:
depositing an ink composition according to claim 1 onto a recording medium to form an image on the recording medium.
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17. The ink composition according to claim 1, wherein the penetration accelerator is a lower alcohol, a cellosolve, a carbitol, or a sufactant.
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18. The ink composition according to claim 17, wherein the lower alcohol is ethanol, isopropanol, butanol, or pentanol.
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19. The ink composition according to claim 17, wherein the cellosolve is ethylene glycol monobutyl ether.
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20. The ink composition according to claim 17, wherein the carbitol is diethylene glycol monobutyl ether, or triethylene glycol monobutyl ether glycol ether.
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21. The ink composition according to claim 1, wherein the surface tension modifier is diethanolamine, triethanolamine, an alcohol, or a nonionic, cationic, anionic or amphoteric surfactant.
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22. The ink composition according to claim 21, wherein the alcohol comprises glycerin and diethylene glycol.
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23. The ink composition according to claim 1, wherein the hydrotropy agent is alkylurea, ethyleneurea, propyleneurea, thiourea, a guanidine acid salt, or a tetraalkylammonium halide.
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24. The ink composition according to claim 1, wherein the humectant is glycerin, diethylene glycol or a saccharide.
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25. The ink composition according to claim 24, wherein the saccharide is maltitol, sorbitol, gluconic lactone, or maltose.
- the cationic, water-soluble resin consisting of repeating units represented by the following formula (I);
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26. An ink set consisting of a black ink, a yellow ink, a cyan ink, and a magenta ink, said black, yellow, cyan, and magenta inks each independently consisting essentially of an alkali-soluble colorant, a water-soluble organic solvent, water, cationic water-soluble resin, a base which is a hydroxide of an alkali metal or an alkaline earth metal and, optionally, one or more of a nonionic water-soluble resin and an assistant selected from the group consisting of a penetration accelerator, a viscosity modifier, a surface tension modifier, a hydrotropy agent, a humectant, a pH adjustor, an antimold, a chelating agent, a preservative and a rust preventive;
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the cationic, water-soluble resin consisting of repeating units represented by the following formula (I);
where R1 and R2 which may be the same or different represent a C1-5 alkyl group, and n is 0, 1, or 2, wherein the alkali-soluble colorant for the black ink is selected from the group of dyes consisting of C.I. Direct Black 19, 35, 154, 168, 171, and 195 and C.I. Food Black 2 the alkali-soluble colorant for the yellow ink is selected from the group of dyes consisting of C.I. Direct Yellow 50, 55, 86, 132, 142, and 144 and C.I. Acid Yellow 23 the alkali-soluble colorant for the cyan ink is selected from the group of dyes consisting of C.I. Direct Blue 86, 87 and 199 and C.I. Blue 9 and 249, the alkali soluble colorant for the magenta ink is selected from the group of dyes consisting of C.I. Direct Red 9 and 227, C.I. Acid Red 52 and 289, and dyes represented by the following structural formula (II);
wherein R3 and R4 represent a hydrogen atom, a C1-5 alkyl group, or a phenoxy group or a derivative thereof, a triazine ring or a derivative thereof, a carboxyl group or a salt thereof, or a sulfonyl group or a derivative thereof;
X represents a hydrogen or halogen atom; and
Y1 and Y2 which may be same or different represent an alkali metal atom, ammonium or a C1-5 alkylammonium. - View Dependent Claims (27)
(a) providing an ink set of claim 26 and (b) depositing droplets of each of the black, yellow, cyan and magenta inks of the ink set onto a recording medium to form an image on the recording medium.
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28. An ink composition comprising an alkali-soluble colorant, a water-soluble organic solvent, water, and a cationic, water-soluble resin,
the cationic, water-soluble resin consisting of repeating units represented by the following formula (I): -
wherein R1 and R2 which may be the same or different represent a hydrogen atom or a C1-5 alkyl group, provided that R1 and R2 do not simultaneously represent a hydrogen atom; and n is 1. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
the first ink composition being the ink composition according to claim 28, the second ink composition being an ink composition comprising an anionic material. -
39. The ink set according to claim 38, wherein the group of first ink compositions comprises a yellow ink, a magenta ink, and a cyan ink and
the second ink composition is a black ink. -
40. The ink set according to claim 38, wherein the first ink composition is a black ink and the second group of ink compositions comprises a yellow ink, a magenta ink, and a cyan ink.
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41. The ink set according to claim 38, wherein the anionic material contained in the second ink composition is an anionic, water-soluble resin.
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42. The ink set according to claim 41, wherein the second ink composition comprises a pigment.
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43. The ink set according to claim 38, wherein the anionic material in the second ink composition is a pigment having an anionic, functional group on its surface.
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44. A recording method comprising the step of:
depositing an ink composition according to claim 28 onto a recording medium to form an image on the recording medium.
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45. An ink set comprising a black ink, a yellow ink, a cyan ink, and a magenta ink, said black, yellow, cyan, and magenta inks each independently comprising an alkali-soluble colorant, a water-soluble organic solvent, water, and a cationic, water-soluble resin,
the cationic, water-soluble resin consisting of repeating units represented by the following formula (I): -
wherein R1 and R2 which may be the same or different represent a C1-5 alkyl group, and n is 1, the black ink comprising a colorant selected from the group of dyes consisting of C.I. Direct Black 19, 35, 154, 168, 171, and 195 and C.I. Food Black 2, the yellow ink comprising a colorant selected from the group of dyes consisting of C.I. Direct Yellow 50, 55, 86, 132, 142, and 144 and C.I. Acid Yellow 23, the cyan ink comprising a colorant selected from the group of dyes consisting of C.I. Direct Blue 86, 87, and 199 and C.I. Acid Blue 9 and 249, the magenta ink comprising a colorant selected from the group of dyes consisting of C.I. Direct Red 9 and 227, C.I. Acid Red 52 and 289, and dyes represented by the following structural formula (II);
wherein R3 and R4 represent a hydrogen atom, a C1-5 alkyl group, an aryl group, a C1-5 alkoxy group, or a phenoxy group or a derivative thereof, a triazine ring or a derivative thereof, a carboxyl group or a salt thereof, or a sulfonyl group or a derivative thereof;
X represents a hydrogen or halogen atom; and
Y1 and Y2 which may be the same or different represent an alkali metal atom ammonium, or a C1-5 alkylammonium. - View Dependent Claims (46)
(a) providing an ink set of claim 45 and (b) depositing droplets of each of the black, yellow, cyan and magenta inks of the ink set onto a recording medium to form an image on the recording medium.
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Specification