# US 10,870,773 B2 · Inkjet ink set for preparing conductive layers or patterns

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- Number: US 10,870,773 B2
- Document ID: US10870773B2
- Status: Granted
- Kind: B2
- Application number: 16/306,975
- Filed: 2017-06-07
- Published: 2019-05-16
- Granted: 2020-12-22
- Earliest claimed: 2016-06-08
- Assignees: Agfa-Gevaert
- Applicants: Agfa-Gevaert NV
- Inventors: Fernando Cortes Salazar
- Web page: https://patentgrep.com/patent/US10870773B2

## CPC

- C09D 11/52: Electrically conductive inks
- B41J 2/1652: {by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head}
- B41M 5/0023: {Digital printing methods characterised by the inks used (inks per se C09D11/00)}
- C09D 11/033: characterised by the solvent
- C09D 11/037: characterised by the pigment
- C09D 11/322: Pigment inks
- C09D 11/326: characterised by the pigment dispersant
- C09D 11/36: based on non-aqueous solvents
- C09D 11/40: Ink-sets specially adapted for multi-colour inkjet printing
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 1)

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.