Ink compositions

• US 6,432,184 B1
• Filed: 08/24/2000
• Issued: 08/13/2002
• Est. Priority Date: 08/24/2000
• Status: Expired due to Fees

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Breton, Marcel P., Farrugia, Valerie M., Malhotra, Shadi L.
• Primary Examiner(s): Klemanski, Helene
• Assistant Examiner(s): Faison, Veronica F.
• Application Number:
  US09/645,851
• Time in Patent Office: 719 Days
• Field of Search: 106/31.43, 106/31.75, 106/31.58, 106/31.86
• US Class Current: 106/31.43
• CPC Class Codes: C09D 11/03 characterised by features other than the chemical nature of the binder
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes

Abstract

An ink composition containing (1) a lighffastness compound, (2) an anticurl compound, (3) poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water.

Claims

1. An ink composition comprised of (1) a lightfastness compound, (2) an anticurl compound, (3) poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water.

2. An ink in accordance with claim 1 wherein the lightfastness compound is present in an amount of from about 0.5 to about 25 percent by weight, the anticurl compound is present in an amount of from about 0.5 to about 25 percent by weight, the poly(diallyl dialkyl ammonium)halide is present in an amount of from about 0.5 to about 25 percent by weight, the colorant is present in an amount of from about 0.5 to about 20 percent by weight, and water is present in an amount of from about 98 to about 5 percent by weight and wherein the total of all ink components is about 100 weight percent.

3. An ink in accordance with claim 1 wherein the lightfastness compound is present in an amount of from about 0.5 to about 25 percent by weight, and is selected from the group consisting of (1) 2,6-bis(hydroxymethyl)-ρ

-cresol, (2) 4-tert-amyl phenol, (3) 3-(2H-benzotriazol-2-yl)-4-hydroxyphenethylalcohol,(4)2,2-bis(4-hydroxy-3-methyl phenyl)propane, (5)bis(2-hydroxyphenyl)methane, (6) (2-endo,3-oxo)-bicyclo(2.2.2.]oct-5-ene-2,3-dimethanol,(7)1,3-dioxane-5,5-dimethanol, (8)1,4-dioxane-2,3-diol, (9) 4,8-bis(hydroxymethyl)tricyclo(5.2.1.0^2,6)decane, (10)1,4-benzenedimethanol, (11) 1,3-benzene dimethanol, (12) 1,2-benzenedimethanol, (13) 3-phenoxy-1,2-propanediol,(14) 4,4′

-isopropylidene bis(2-(2,6-dibromo phenoxy)ethanol), and (15) (2,2′

-(1,4-phenylenedioxy)diethanol).

4. An ink in accordance with claim 1 wherein the anticurl compound is present in an amount of from about 0.5 to about 25 percent by weight, and is selected from the group consisting of (1) 2-amino-2-methyl-1,3-propanediol, (2) 2-amino-1-phenyl-1,3-propanediol, (3) 2,2-dimethyl-1-phenyl-1,3-propanediol, (4) 2-bromo-2-nitro-1,3-propanediol, (5) 3-tert-butylamino-1,2-propanediol, (6) 1,1-diphenyl-1,2-propanediol, (7) 1,4-dibromo-2,3-butanediol, (8) 2,3-dibromo-1,4-butanediol, (9) 2,3-dibromo-2-butene-1,4-diol, (10) 1,1,2-triphenyl-1,2-ethanediol, (11) 2,2-bis(hydroxymethyl)-2,2′

,2″

-nitrilotriethanol, (12) tris(hydroxymethyl)aminomethane succinate, (13) 4,4′

-trimethylene bis(1-piperidine ethanol), (14) N-methyl-D-glucamine, (15) xylitol, (16) pantothenol, (17)2,2-thiodiethanol , and (18) 3,6-dithia-1,8-octanediol.

5. An ink in accordance with claim 1 wherein said poly(diallyl dialkyl ammonium)halide is present in an amount of from about 0.5 to about 25 percent by weight and is poly(diallyl diethyl ammonium)bromide and possesses a molecular weight M_w of from about 1,000 to about 3,000.

6. An ink in accordance with claim 1 wherein the colorant is a dye.

7. An ink in accordance with claim 1 wherein the colorant is black.

8. An ink in accordance with claim 1 wherein the colorant is magenta, yellow, cyan, red, blue, green, black, or mixtures thereof.

9. An ink in accordance with claim 1 containing a biocide.

10. An ink in accordance with claim 9 wherein the biocide is present in an amount of from about 0.01 to about 0.25 percent by weight.

12. A process which comprises (a) providing an acoustic ink printer having a pool of liquid ink with a free surface, and a printhead including at least one droplet ejector for radiating the free surface of said ink with focused acoustic radiation to eject individual droplets of ink therefrom on demand, said radiation being directed to focus with a finite waist diameter in a focal plane, said ink comprising the components of claim 1;

and (b) causing droplets of said ink to be ejected onto a recording sheet in an imagewise pattern at an optional temperature of from about 25°

C. to about 50°

C.

13. A thermal ink jet process wherein images are developed with the ink of claim 1.

14. An ink in accordance with claim 1 wherein said poly(diallyl dialkylammonium)halide is (1) poly(diallyl dimethyl ammonium)bromide, (2) poly(diallyl diethyl ammonium)bromide, (3) poly(diallyl diheptyl ammonium)bromide, (4) poly(diallyl diheptadecyl ammonium)bromide, or (5) poly(diallyl dioctadecyl ammonium)bromide.

15. An ink in accordance with claim 1 wherein said poly(diallyl dialkylammonium)halide is poly(diallyl diethylammonium)bromide.

16. An ink in accordance with claim 1 wherein the anticurl compound is 3,6-dithia-1,8-octanediol and said dialkyl contains from 1 to about 15 carbon atoms.

17. An ink in accordance with claim 1 wherein the lightfastness compound is present in an amount of from about 1 to about 10 percent by weight, the anticurl compound is present in an amount of from about 1 to about 10 percent by weight, the poly(diallyl dialkyl ammonium)halide is present in an amount of from about 1 to about 10 percent by weight, the colorant is present in an amount of from about 1 to about 10 percent by weight, and water is present in an amount of from about 96 to about 60 percent by weight and wherein the total of all ink components is about 100 weight percent.

18. An ink in accordance with claim 1 with a viscosity of from about 1.5 to about 4 cps at about 50°

C., a curl value of from about zero to about 10 mm, a lightfastness value of from about 85 to about 100 percent and a waterfastness value of from about 95 to about 99 percent.

11. A printing process which comprises incorporating into an ink jet printer an ink composition comprised of (1) a lightfastness compound, (2) an anticurl compound, (3) a poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water;

and causing droplets of the ink to be ejected in imagewise pattern onto a substrate.

19. An ink comprised of (1) a lightfastness compound, (2) an anticurl compound, (3) a poly(diallyl dialkylammonium)halide, (4) a colorant and (5) a vehicle.

20. An ink in accordance with claim 19 wherein said vehicle is water.

21. An ink in accordance with claim 19 wherein said vehicle is a glycol.

22. An ink in accordance with claim 19 wherein said vehicle is present in an amount of from about 98 to about 5 percent by weight and which vehicle is (1) 1,3-propanediol, (2) 1,2-butanediol, (3) glycerol, (4) propylene carbonate, (5) tetramethylene sulfone, (6) 2,2′

-thiodiethanol, (7) 2,2′

-sulfonyldiethanol, (8) di(ethyleneglycol)butylether, or (9) diethylene glycol dibutylether.

23. An ink in accordance with claim 19 wherein said dialkyl contains from about 2 to about 40 carbon atoms, and wherein halide is chloride, bromide, or fluoride.

24. An ink in accordance with claim 19 wherein said dialkyl contains from 2 to about 12 carbon atoms.

25. An ink in accordance with claim 19 wherein said dialkyl is diethyl, dipropyl, dipentyl, diheptadecyl, or dioctadecyl.

26. An ink in accordance with claim 19 wherein said poly(diallyldialkylammonium)halide is (1) poly(diallyl dimethyl ammonium)bromide, (2) poly(diallyl diethyl ammonium)bromide, (3) poly(diallyl diheptyl ammonium)bromide, (4) poly(diallyl diheptadecyl ammonium)bromide, (5) poly(diallyl dioctadecyl ammonium)bromide, with poly(diethyldiallyl)ammonium bromide being preferred.

27. An ink composition consisting of (1) a lightfastness compound, (2) an anticurl compound, (3) poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water.

28. An ink composition comprised of (1) a lightfastness compound, (2) an anticurl compound, (3) poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water, and wherein the lightfastness compound is present in an amount of from about 0.5 to about 25 percent by weight, and is selected from the group consisting of (1) 2,6-bis(hydroxymethyl)-ρ

-cresol, (2) 4-tert-amyl phenol, (3) 3-(2H-benzotriazol-2-yl)-4-hydroxyphenethyl alcohol, (4) 2,2-bis(4-hydroxy-3-methyl phenyl)propane, (5) bis(2-hydroxyphenyl)methane, (6) (2-endo,3-oxo)-bicyclo(2.2.2.]oct-5-ene-2,3-dimethanol, (7) 1,3-dioxane-5,5-dimethanol, (8) 1,4-dioxane-2,3-diol, (9) 4,8-bis(hydroxymethyl)tricyclo(5.2.1.0^2,6)decane, (10) 1,4-benzenedimethanol, (11) 1,3-benzene dimethanol, (12) 1,2-benzenedimethanol, (13) 3-phenoxy-1,2-propanediol, (14) 4,4′

-isopropylidene bis(2-(2,6-dibromo phenoxy)ethanol), and (15) (2,2′

-(1,4-phenylenedioxy) diethanol).

29. An ink composition comprised of (1) a lightfastness compound, (2) an anticurl compound, (3) poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water, and wherein the anticurl compound is present in an amount of from about 0.5 to about 25 percent by weight, and is selected from the group consisting of (1) 2-amino-2-methyl-1,3-propanediol, (2) 2-amino-1-phenyl-1,3-propanediol, (3) 2,2-dimethyl-1-phenyl-1,3-propanediol, (4) 2-bromo-2-nitro-1,3-propanediol, (5) 3-tert-butylamino-1,2-propanediol, (6) 1,1-diphenyl-1,2-propanediol, (7) 1,4-dibromo-2,3-butanediol, (8) 2,3-dibromo-1,4-butanediol, (9) 2,3-dibromo-2-butene-1,4-diol, (10) 1,1,2-triphenyl-1,2-ethanediol, (11) 2,2-bis(hydroxymethyl)-2,2′

,2″

-nitrilotriethanol, (12) tris(hydroxymethyl)aminomethane succinate, (13) 4,4′

-trimethylene bis(1-piperidine ethanol), (14) N-methyl-D-glucamine, (15) xylitol, (16) pantothenol, (17) 2,2-thiodiethanol, and (18) 3,6-dithia-1,8-octanediol.

30. An ink composition comprised of (1) a lightfastness compound, (2) an anticurl compound, (3) poly(diallyl dialkyl ammonium)halide, (4) colorant and (5) water, and wherein the anticurl compound is 3,6-dithia-1,8-octanediol and said dialkyl contains from 1 to about 15 carbon atoms.