Inkjet ink set for preparing conductive layers or patterns

Patent metadata

Field	Value
Publication number	US-10870773-B2
Application number	US-201716306975-A
Country	US
Kind code	B2
Filing date	Jun 7, 2017
Priority date	Jun 8, 2016
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

An inkjet ink set includes a silver inkjet ink and a flushing liquid, characterized in that the flushing liquid includes at least 25 wt % of 2-phenoxy ethanol based on the total weight of the flushing liquid.

First claim

The invention claimed is:

1. An inkjet ink set comprising:
a silver inkjet ink; and
a flushing liquid; wherein
the flushing liquid includes at least 25 wt % of 2-phenoxy ethanol based on a total weight of the flushing liquid, and wherein
the silver inkjet ink includes silver nanoparticles, a liquid carrier, and a non-polymeric dispersion-stabilizing compound according to Formula I, II, III, or IV:

wherein
Q represents atoms necessary to form a substituted or unsubstituted five or six membered heteroaromatic ring;
M is selected from the group consisting of a hydrogen, a monovalent cationic group, and an acyl group;
R1 and R2 are independently selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl or heteroaryl group, a hydroxyl group, a thioether, an ether, an ester, an amide, an amine, a halogen, a ketone, and an aldehyde;
R1 and R2 may represent atoms necessary to form a five to seven membered ring;
R3 to R5 are independently selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl or heteroaryl group, a hydroxyl group, a thiol, a thioether, a sulfone, a sulfoxide, an ether, an ester, an amide, an amine, a halogen, a ketone, an aldehyde, a nitrile, and a nitro group;
R4 and R5 may represent atoms necessary to form a five to seven membered ring.

2. The inkjet ink set according to claim 1 , wherein the silver inkjet ink includes the non-polymeric dispersion-stabilizing compound according to Formula I, and Q represents the atoms necessary to form a five membered heteroaromatic ring.

3. The inkjet ink set according to claim 2 , wherein the five membered heteroaromatic ring is selected from the group consisting of an imidazole, a benzimidazole, a thiazole, a benzothiazole, an oxazole, a benzoxazole, a 1,2,3-triazole, a 1,2,4-triazole, an oxadiazole, a thiadiazole, and a tetrazole.

4. The inkjet ink set according to claim 1 , wherein the non-polymeric dispersion-stabilizing compound is selected from the group consisting of N, N-dibutyl-(2,5-dihydro-5-thioxo-1H-tetrazol-1-yl-acetamide, 5-hepty1-2-mercapto-1,3,4-oxadiazole, 1-phenyl-5-mercaptotetrazol, 5-methyl-1,2,4-triazolo-(1,5-a) primidine-7-ol, and S[5-[(ethoxy-carbonyl)amino]-1,3,4-thiadiazol-2-yl] 0 -ethyl thiocarbonate.

5. The inkjet ink set according to claim 1 , wherein an amount of the non-polymeric dispersion-stabilizing compound expressed as wt % relative to a total weight of silver in the silver inkjet ink is between 0.005 and 10.0.

6. The inkjet ink set according to claim 1 , wherein the liquid carrier is a high boiling solvent selected from the group consisting of 2-phenoxy ethanol, 4-methyl-1,3-dioxolan-2-one, n-butanol, 1,2 propanediol, 4-hydroxy-4-methyl pentan-2-one, pentan-3-one, 2-butoxy-ethanol, 1-methoxy-2-propanol and mixtures thereof.

7. The inkjet ink set according to claim 1 , wherein the liquid carrier includes at least 25 wt % of 2-phenoxyethanol and between 5 and 20 wt % of n-butanol.

Assignees

• Agfa Gevaert Nv

Inventors

• Cortes Salazar Fernando

Classifications

• C09D11/326

  characterised by the pigment dispersant · CPC title

• C09D11/037

  characterised by the pigment · CPC title

• C09D11/52 Primary

  Electrically conductive inks · CPC title

• C09D11/322 Primary

  Pigment inks · CPC title

• B41M5/0023

  Digital printing methods characterised by the inks used (inks per se C09D11/00) · CPC title