Ink composition for inkjet printing on substrate material comprising polyvinyl chloride

1. An organic solvent-based ink composition for printing on substrate material comprising polyvinyl chloride, the printing being done by thermal inkjet, drop on demand piezo inkjet, or continuous inkjet, the ink comprising:

less than 20 weight percent n-vinyl pyrrolidone in combination with greater than 80 weight percent to 90 weight percent methanol, ethanol, methyl ethyl ketone, acetone, methyl acetate, ethyl acetate, or any combination thereof; and

colorant; and

the ink being free from polymerizable resins and binders.

2. The ink of claim 1 , wherein the ink comprises 2 to 12 weight percent n-vinyl pyrrolidone.

3. The ink of claim 1 , further comprising a surface active agent selected from the group consisting of polyester-modified silicone, polyether-modified silicone and combinations thereof.

4. The ink of claim 1 , wherein the colorant comprises one or more of non-aqueous solvent-based dyes and non-aqueous solvent-based pigments and combinations thereof.

5. The ink of claim 4 , wherein the non-aqueous solvent-based dyes are selected from the group consisting of Solvent Red 38, Solvent Red 122, Solvent Red 8, Solvent Red 49, Solvent Blue 5, Solvent Blue 70, Solvent Blue 44, Solvent Black 7, Solvent Black 5, Solvent Orange 54, Solvent Black 29 and combinations thereof.

6. The ink of claim 3 , wherein the ink comprises from 2 to 12 weight percent n-vinyl pyrrolidone, from 0.1 to 5 weight percent surface active agent, and from 1 to 10 weight percent colorant.

7. The ink of claim 3 , wherein the ink comprises from 1 to 3 weight percent colorant, from 9 to 12 weight percent n-vinyl pyrrolidone, and from 0.5 to 1.5 weight percent surface active agent.

8. A method of printing on substrate material comprising polyvinyl chloride, the printing being done by thermal inkjet, drop on demand piezo inkjet, or continuous inkjet, the method comprising:

depositing organic solvent-based ink on the polyvinyl chloride, wherein the ink comprises less than 20 weight percent n-vinyl pyrrolidone in combination with 80 to 90 weight percent methanol, ethanol, or a combination thereof, and colorant, and the ink being free from polymerizable resins and binders.

9. The method of claim 8 , wherein the ink comprises from 2 to 12 weight percent n-vinyl pyrrolidone.

10. The method of claim 8 , wherein the ink further comprises a surface active agent selected from the group consisting of polyester-modified silicone, polyether-modified silicone and combinations thereof.

11. The method of claim 8 , wherein the colorant is selected from the group consisting of non-aqueous solvent-based dyes, non-aqueous solvent-based pigments and combinations thereof.

12. The method of claim 11 , wherein the non-aqueous solvent-based dyes are selected from the group consisting of Solvent Red 38, Solvent Red 122, Solvent Red 8, Solvent Red 49, Solvent Blue 5, Solvent Blue 70, Solvent Blue 44, Solvent Black 7, Solvent Black 5, Solvent Orange 54, Solvent Black 29 and combinations thereof.

13. The method of claim 10 , wherein the ink comprises from 2 to 12 weight percent n vinyl pyrrolidone, from 0.1 to 5 weight percent surface active agent, and from 1 to 10 weight percent colorant.

14. The method of claim 10 , wherein the ink comprises from 1 to 3 weight percent colorant, from 9 to 12 weight percent n-vinyl pyrrolidone, and from 0.5 to 1.5 weight percent surface active agent.

15. A method of utilizing organic solvent-based ink comprising vinyl-penetrating solvent to print on substrate material comprising polyvinyl chloride, the printing being done by thermal inkjet, drop on demand piezo inkjet, or continuous inkjet, the method comprising:

depositing the ink on the polyvinyl chloride, wherein the ink comprises less than 20 weight percent n-vinyl pyrrolidone in combination with 80 to 90 weight percent methanol, ethanol, or a combination thereof, and colorant.

16. The method of claim 15 , wherein the ink comprises 2 to 12 weight percent n-vinyl pyrrolidone.

17. The method of claim 15 , wherein the ink further comprises a surface active agent selected from the group consisting of polyester-modified silicone, polyether-modified silicone and combinations thereof.

18. The method of claim 15 , wherein the colorant is selected from the group consisting of non-aqueous solvent-based dyes, non-aqueous solvent-based pigments and combinations thereof.

19. The method of claim 18 wherein the non-aqueous solvent-based dyes are selected from the group consisting of Solvent Red 38, Solvent Red 122, Solvent Red 8, Solvent Red 49, Solvent Blue 5, Solvent Blue 70, Solvent Blue 44, Solvent Black 7, Solvent Black 5, Solvent Orange 54, Solvent Black 29 and combinations thereof.

20. The method of claim 17 , wherein the ink comprises from 2 to 12 weight percent n-vinyl pyrrolidone, from 0.1 to 5 weight percent surface active agent, and from 1 to 10 weight percent colorant.

21. The method of claim 17 , wherein the ink comprises from 1 to 3 weight percent colorant, from 9 to 12 weight percent n-vinyl pyrrolidone, and from 0.5 to 1.5 weight percent surface active agent.

22. The method of claim 15 , wherein the ink is free of polymerizable resins and binders.

23. Recorded matter printed on a substrate comprising polyvinyl chloride utilizing the ink composition as claimed in claim 1 .

24. The ink of claim 1 , wherein the ink comprises less than 20 weight percent n-vinyl pyrrolidone in combination with 80 to 90 weight percent methanol.

25. The method of claim 8 , wherein the ink comprises less than 20 weight percent n-vinyl pyrrolidone in combination with 80 to 90 weight percent methanol.

26. The method of claim 15 , wherein the ink comprises less than 20 weight percent n-vinyl pyrrolidone in combination with 80 to 90 weight percent methanol.