# US 10,308,042 B2 · Radiation-curable inkjet ink composition

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- Number: US 10,308,042 B2
- Document ID: US10308042B2
- Status: Granted
- Kind: B2
- Application number: 15/460,695
- Filed: 2017-03-16
- Published: 2017-10-05
- Granted: 2019-06-04
- Earliest claimed: 2016-03-30
- Assignees: Océ Holding B. V.
- Applicants: Océ Holding B.V.
- Inventors: Richard F. E. Van Hout; Björn H. A. J. M. Ketelaars; R. Van Hameren; Bas Venderbosch
- Web page: https://patentgrep.com/patent/US10308042B2

## CPC

- C07C 69/76: Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
- C09D 11/101: Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
- C09D 11/107: from unsaturated acids or derivatives thereof
- C09D 11/34: Hot-melt inks
- C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes
- C09D 11/40: Ink-sets specially adapted for multi-colour inkjet printing
- B41J 11/00214: {using UV radiation}
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- 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

## Abstract

The present invention relates to a radiation curable ink composition including a gellant. The present invention further relates to an ink set having such ink composition. The present invention further relates to a method for making such ink composition and a printing method using such ink composition.

## Claims

### Claim 1

Radiation-curable inkjet ink composition comprising a gellant, wherein the gellant is a compound according to formula I,
wherein R1, R2 and R3 are each independently selected from an alkyl, an arylalkyl, an alkenyl group and a R′(OCH2CHR″)x(OCH2CHR′″)y(OCH2CHR″″)z— group,
wherein R′ is an alkyl group having 1-4 carbon atoms, R″, R′″ and R″″ are each independently selected from a hydrogen atom, a methyl group or an ethyl group and x, y, z are integers in the range of 0-20, wherein x+y+z is in the range of 4-30 and wherein R4, R5 and R6 are each independently selected from a hydrogen atom and an alkyl group having 1-4 carbon atoms.

### Claim 2 (depends on 1)

Radiation-curable inkjet ink composition according to claim 1, wherein R4, R5 and R6 each represent a hydrogen atom.

### Claim 3 (depends on 1)

Radiation-curable inkjet ink composition according to claim 1, wherein R1, R2 and R3 are each independently selected from an alkyl group having 8-25 carbon atoms.

### Claim 4 (depends on 3)

Radiation-curable inkjet ink composition according to claim 3, wherein R1, R2 and R3 are the same.

### Claim 5 (depends on 1)

Radiation-curable inkjet ink composition according to claim 1, wherein the gellant is present in an amount of 0.2 wt %-3.0 wt % based on the total weight of the radiation-curable inkjet ink composition.

### Claim 6 (depends on 1)

Radiation-curable inkjet ink composition according to claim 1, wherein the ink composition comprises an acrylate having two or more acrylate functional groups.

### Claim 7 (depends on 6)

Radiation-curable inkjet ink composition according to claim 6, wherein the ink composition further comprises a monofunctional acrylate.

### Claim 8 (depends on 1)

Ink set comprising a radiation-curable inkjet ink composition according to claim 1.