# US 2025/0084267 A1 · Radiation Curable Ink Jet Composition And Ink Set

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- Number: US 2025/0084267 A1
- Document ID: US20250084267A1
- Status: Published application
- Kind: A1
- Application number: 18/958,053
- Filed: 2024-11-25
- Published: 2025-03-13
- Earliest claimed: 2021-01-08
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Kyohei TANAKA; Midori SEKINE; Chigusa SATO
- Web page: https://patentgrep.com/patent/US20250084267A1

## CPC

- 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 11/322: Pigment inks
- 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)

## Abstract

A radiation curable ink jet composition includes polymerizable compounds and a colorant, the polymerizable compounds includes a monofunctional polymerizable compound in an amount of 78 percent by mass or more with respect to a total mass of the polymerizable compounds, and the colorant includes at least one selected from the group consisting of C.I. Pigment Orange 36, C.I. Pigment Orange 38, C.I. Pigment Orange 43, C.I. Pigment Orange 64, C.I. Pigment Orange 71, C.I. Pigment Red 177, C.I. Pigment Red 179, C.I. Pigment Red 224, C.I., Pigment Red 254, C.I. Pigment Red 255, C.I. Pigment Violet 23, C.I. Pigment Violet 32, C.I. Pigment Violet 37, C.I. Pigment Violet 39, C.I. Pigment Green 7, C.I. Pigment Green 36, C.I. Pigment Blue 15:6, C.I. Pigment Blue 25, and C.I. Pigment Blue 60.

## Claims

### Claim 1

A radiation curable ink jet composition comprising:
polymerizable compounds; and
a colorant,
wherein
the colorant includes at least one selected from the group consisting of C.I. Pigment Orange 36, C.I. Pigment Orange 38, C.I. Pigment Orange 43, C.I. Pigment Orange 64, C.I. Pigment Orange 71, C.I. Pigment Red 177, C.I. Pigment Red 179, C.I. Pigment Red 224, C.I., Pigment Red 254, C.I. Pigment Red 255, C.I. Pigment Violet 23, C.I. Pigment Violet 32, C.I. Pigment Violet 37, C.I. Pigment Violet 39, C.I. Pigment Green 7, C.I. Pigment Green 36, C.I. Pigment Blue 15:6, C.I. Pigment Blue 25, and C.I. Pigment Blue 60, and
the polymerizable compounds includes vinyl methyl oxazolidinone.

### Claim 2 (depends on 1)

The radiation curable ink jet composition according to claim 1,
wherein the colorant includes C. I. Pigment Orange 43 or C.I. Pigment Red 254.

### Claim 3 (depends on 1)

The radiation curable ink jet composition according to claim 1,
wherein the polymerizable compounds includes an N-vinyl compound in an amount of 5 percent by mass or less with respect to the total mass of the polymerizable compounds.

### Claim 4 (depends on 1)

The radiation curable ink jet composition according to claim 1,
wherein a content of the monofunctional polymerizable compound with respect to the total mass of the polymerizable compounds is 90 percent by mass or more.

### Claim 5 (depends on 1)

The radiation curable ink jet composition according to claim 1,
wherein when the polymerizable compounds form respective homopolymers having glass transition temperatures, the polymerizable compounds have a weight average glass transition temperature (Tg) of 42° C. or more, the weight average glass transition temperatures being obtained based on mass rates of the respective polymerizable compounds.

### Claim 6 (depends on 1)

The radiation curable ink jet composition according to claim 1,
wherein the polymerizable compounds includes a monofunctional polymerizable compound in an amount of 78 percent by mass or more with respect to a total mass of the polymerizable compounds.

### Claim 7 (depends on 1)

An ink set comprising:
a cyan ink composition;
a magenta ink composition;
a yellow ink composition;
a black ink composition; and
the radiation curable ink jet composition according to claim 1.