IP Library › Granted Patent US 8,501,830
Granted Patent B2
US 8,501,830 · App. 12/679,421 · Granted Aug 6, 2013

Ink jet ink and a method of ink jet printing

Inventors: Hartley David Selman (Bristol, GB); Graeme Edward Charles Beats (Wells, GB); Nigel Anthony Caiger (Woodkey Hole, GB); Andrew David Speirs (Melksham, GB); Stephen Paul Wilson (Shepton Mallet, GB)
Assignee: Sun Chemical Corporation
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Quick Facts
Patent No.
US 8,501,830
App. No.
12/679,421
Granted
Aug 6, 2013
Kind
B2
Abstract

The invention describes a radiation-curable ink jet ink, which comprises at least 50% by weight of cyclic trimethylolpropane formal acrylate (CTFA), and further comprises a free-radical photoinitiator, and which is substantially free of volatile compounds.

Claims (19)

1. A radiation-curable ink jet ink comprising at least 50% by weight of cyclic trimethylolpropane formal acrylate (CTFA), and further comprising a free-radical photoinitiator, and which is substantially free of volatile compounds.

2. An ink jet ink as claimed in claim 1 comprising at least 60% by weight of CTFA.

3. An ink jet ink as claimed in claim 2 comprising at least 70% by weight of CTFA.

4. An ink jet ink as claimed in claim 1 which also comprises no more than 25% by weight of a tri- or higher functional monomer(s).

5. An ink jet ink as claimed in claim 1 which comprises no more than 10% by weight of a penta- or hexafunctional monomer(s).

6. An ink jet ink as claimed in claim 1 which comprises no more than 5% by weight of a di- or higher functional monomer or monomers.

7. An ink jet ink as claimed in claim 1 comprising from 0.1 to 25% by weight of a colorant.

8. An ink jet ink as claimed in claim 1 which comprises from 0.1 to 20% by weight of a UV free-radical photoinitiator.

9. An ink jet ink as claimed in claim 1 having a viscosity of less than 30 mPas at 50° C.

10. A radiation-curable ink jet ink which comprises at least 50% by weight of cyclic trimethylolpropane formal acrylate (CTFA) and which also comprises a free radical photoinitiator, and wherein di- or higher functional monomers, if present, in total account for no more than 5% by weight of the ink.

11. A radiation-curable ink jet ink which comprises at least 50% by weight of cyclic trimethylol propane formal acrylate (CTFA), which also comprises a free-radical photoinitiator, and wherein plasticizers, if present, in total account for no more than 5% by weight of the ink.

12. A radiation-curable ink jet ink which comprises at least 50% by weight of cyclic trimethylolpropane formal acrylate (CFTA), at least one di- or higher functional monomer, and a free radical photoinitiator.

13. An ink jet-ink as claimed in claim 12 which comprises less than 1% by weight of volatile compounds.

14. An ink jet printer containing an ink as claimed in claim 1 .

15. A printed object comprising a substrate having on at least one surface the cured product of an ink according to claim 1 .

16. A method of ink jet printing comprising the steps of i) ink jet printing an ink as claimed in claim 1 onto a substrate and ii) exposing the ink to UV-radiation so as to cure the ink.

17. A method as claimed in claim 16 in which the substrate is non-porous.

18. A method as claimed in claim 16 in which the substrate is a flexible substrate.

19. A method as claimed in claim 16 in which the cure does is no more than 400 mJ/cm −2 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2010
From: SELMAN, HARTLEY DAVID; BEATS, GRAEME EDWARD CHARLES; CAIGER, NIGEL ANTHONY; SPEIRS, ANDREW DAVID; WILSON, STEPHEN PAUL
To: SUN CHEMICAL CORPORATION
Reel/Frame 024603/0389 →
Priority Claims (1)
GB 0719464.0 · Oct 4, 2007 · national
Continuity (1)
Related Publication 20100285282A1 · Nov 11, 2010