Fluorescent and phosphorescent tagged ink for indicia

• US 5,569,317 A
• Filed: 12/22/1994
• Issued: 10/29/1996
• Est. Priority Date: 12/22/1994
• Status: Expired due to Fees

• Current Assignee: Pitney Bowes Incorporated (Böwe Systec AG)
• Original Assignee: Pitney Bowes Incorporated (Böwe Systec AG)
• Inventors: Bernard, Richard A., Sarada, Thyagaraj
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US08/362,372
• Time in Patent Office: 677 Days
• Field of Search: 106/21 R, 106/21 A, 106/20 B, 106/23 B, 106/22 B
• US Class Current: 524/111
• CPC Class Codes: C09D 11/50 Sympathetic, colour changing or similar inks

Abstract

Inks have been discovered that may be used for providing additional security to the printed matter to which the ink has been affixed. A single ink provides the foregoing result by being fluorescent and phosphorescent.

Claims

1. A fluorescent, phosphorescent composition dispersion ink that is both fluorescent and phosphorescent when radiated with ultra violet light having a wavelength of 254 nm, said ink composition consisting essentially of:

13.5 to 19.4 weight % of fluorescent pigment;

5 to 10 weight % phosphorescent material;

0 to 1.0 weight % wetting agent;

0.45 to 0.5 weight % aluminum stearate;

0 to 0.2 weight % polyvinyl chloride;

0 to 0.5 weight % deodorant;

0 to 1.0 weight % substituted diphenylamine

2.4 to 4.1 weight % non fluorescent pigments; and

the balance consisting of dioctyl phthalate, or diisooctyl phthalate or dioctyl adipate, or butyl acetal ricinoleate and/or extender and plasticizer containing severely hydro-treated vehicles or mixtures thereof.

2. The composition claimed in claim 1, wherein the fluorescent pigments are solid solutions of fluorescent dyes dissolved in melamine-sulfonamide.

3. The composition claimed in claim 2, wherein the fluorescent dyes are rhodamine dyes.

4. The composition claimed in claim 1, wherein the fluorescent pigments are solid solutions of fluorescent dyes dissolved in melamine-formaldehyde.

5. The composition claimed in claim 4, wherein the fluorescent dyes are rhodamine dyes.

6. The composition claimed in claim 1, wherein the fluorescent pigments are solid solutions of fluorescent dyes dissolved in melamine-sulfonamide and melamine-formaldehyde.

7. The composition claimed in claim 6, wherein the fluorescent dyes are rhodamine dyes.

8. The composition claimed in claim 1, wherein the phosphorescent material consists essentially of:

rare earth metal sulfide and yttrium oxysulfide, or yttrium phosphovanadate compounds doped with europium.

9. A solution fluorescent, phosphorescent composition ink that is both fluorescent and phosphorescent when radiated with ultra violet light having a wavelength of 254 nm, said ink composition consisting essentially of:

30.8 to 31.8 weight % of fluorescent toner;

1 to 5 weight % phosphorescent material;

15 to 32 weight % tripopylene glycol (TPG) and/or tetraethylene glycol (TEEG) or triethylene glycol (TEG) and/or diethylene glycol, (DEG);

26 to 42.5 weight % polyoxyethylene fatty ester or dodcyl alcohol ethoxylate or oleyl alcohol ethoxylate;

3 to 4 weight % propylene carbonate;

3.5 to 5 weight % surfactant; and

0.2 weight % coloring dyes.

10. The composition claimed in claim 9, wherein the fluorescent toners consist essentially of:

solution of fluorescent dyes dissolved in melamine polymer of benzene sulfonamide, methyl formaldehyde and tetra hydro imidazo (4,5-d) imidazole-2.5 (1H, 3H) dione with a molecular weight average of 1,000 to 15,000 yielding a solid.

11. The composition claimed in claim 9, wherein the fluorescent toners consist essentially of:

solid solution of fluorescent dyes dissolved in tri-azine modified sulfonamide resin.

12. The composition claimed in claim 9, wherein the fluorescent toners consist essentially of:

fluorescent dyes dissolved in matrix resin made of amino or amide aldehyde with ortho and para toluene sulfonamide.

13. The composition claimed in claim 12, wherein the fluorescent dye consist essentially of:

Basic Red 1, C.I. Basic Violet 11, and C.I. solvent yellow 44.

14. The composition claimed in claim 10, wherein the fluorescent dye consist essentially of:

Basic Red 1, C.I. Basic Violet 11, C.I. solvent 135, and C.I. solvent yellow 60;

1.

15. The composition claimed in claim 11, wherein the fluorescent dye consist essentially of:

Basic Red 1, C.I. Basic Violet 11, C.I. solvent 135, and C.I. solvent yellow 60;

1.

16. The composition claimed in claim 9, wherein the phosphorescent material consists essentially of:

rare earth metal sulfide and yttrium oxysulfide, or yttrium phosphoranadate compounds doped with europium.

17. The composition claimed in claim 9, wherein the phosphorescent material consists essentially of:

zinc orthosilicate doped with maganese.

18. The composition claimed in claim 17, wherein the esters consists essentially of:

oleyl alcohol ethoxylate, and dodecyl alcohol ethoxylate.

19. The composition claimed in claim 9, further including a thinning agent:

propylene carbonate.

20. The composition claimed in claim 9, wherein the surfacant is non ionic with a hydrophile-lipophile balance (HLB) between 4 and 10.