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US 9,546,292 B2Granted
Ink additive combinations for improving printhead lifetime
AssigneeMemjet Technology Limited
InventorsDavid Tyvoll, Simon Fielder, Michele Gimona, Christopher Barton, Jognandan Prashar, Michele Shepard, Iain Blake, Richard Myors, Luke Grassy
Life of this patent
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Abstract
An inkjet ink for improving printhead lifetimes includes: an aqueous-based ink vehicle; a colorant; an anti-kogation additive; and an anti-corrosion additive having at least one acetylenic group, the acetylenic group being absent any tertiary or quaternary α-carbon atoms.
Claims24
An inkjet ink comprising:
- an aqueous-based ink vehicle;
- a colorant;
- an anti-kogation additive comprising a first organic compound having at least three moieties selected from the group consisting of:
- —(CH2CH2O)—;
- —(CH2CH(Me)O)—;
- —CH2OH;
- and —CH(OH)—;
- an anti-corrosion additive of formula (B):
- R1—C≡C—(CH2)mCH(R2)—(OCH2R3)n—OH (B)
- wherein:
- R1 is selected from the group consisting of:
- H, C1-3 alkyl, —(CH2)pCH(R4)(R5) and —(C≡C)—(CH2)pCH(R4)(R5);
- R2 is selected from the group consisting of:
- H and C1-3 alkyl;
- R3 is selected from the group consisting of:
- —CH2- and —CH(CH3)-;
- R4 is selected from the group consisting of:
- H and C1-3 alkyl;
- R5 is selected from the group consisting of:
- H, C1-3 alkyl, —OH and —(OCH2R3)q-OH;
- m is 0, 1, 2 or 3;
- p is 0, 1, 2 or 3;
- and
- n is 0 or an integer in the range of 1 to 50;
- and
- q is an integer in the range of 1 to 50,
- and wherein the first and second organic compounds are different than each other.
24 more elements
An inkjet ink comprising:
- an aqueous-based ink vehicle;
- a colorant;
- an anti-kogation additive of formula (A):
- wherein:
- Rx, Ry and Rz are independently selected from the group consisting of hydrogen and methyl;
- and
- x, y and z are each integers in the range of 1 to 50;
- and
- an anti-corrosion additive comprising a second organic compound having at least one acetylenic moiety, the acetylenic moiety being absent any tertiary or quaternary α-carbon atoms.
6 more elements
Dependencies are inferred from the claim text.