# US 9,040,150 B2 · Active energy ray-curable inkjet ink composition and printed material using same

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- Number: US 9,040,150 B2
- Document ID: US9040150B2
- Status: Granted
- Kind: B2
- Application number: 14/342,014
- Filed: 2012-08-29
- Published: 2014-07-31
- Granted: 2015-05-26
- Earliest claimed: 2011-08-29
- Assignees: Toyo Ink Sc Holdings Co., Ltd.; Toyo Ink Co., Ltd.
- Applicants: Yuji Kameyama; Mayuko Okamoto; Yohei Konda; Kazuhiro Jonai; Norio Suzuki
- Inventors: Yuji Kameyama; Mayuko Okamoto; Yohei Konda; Kazuhiro Jonai; Norio Suzuki
- Web page: https://patentgrep.com/patent/US9040150B2

## CPC

- C09D 11/30: Inkjet printing inks
- 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 11/322: Pigment inks
- C09D 11/326: characterised by the pigment dispersant
- C09D 11/36: based on non-aqueous solvents
- C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes
- C09D 11/00: Inks
- Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Provided is an ink composition used in active energy ray-curable inkjet printing, which has excellent curing property, discharge property, storage stability, and compatibility with various substrates. The inkjet ink composition of the present invention includes at least two types of polymerizable compounds selected from a group consisting of (A) 2-(2-vinyloxyethoxy) ethyl acrylate, (B) N-vinyl caprolactam, and (C) at least one type of bifunctional acrylate monomer including at least a diacrylate having a molecular weight of 250 or less.

## Claims

### Claim 1

An active energy ray-curable inkjet ink composition comprising at least two types of polymerizable compounds selected from the group consisting of
(A) 2-(2-vinyloxyethoxy) ethyl acrylate,
(B) N-vinyl caprolactam, and
(C) a bifunctional acrylate monomer comprising a diacrylate and having a molecular weight of 250 or less,
said composition further comprising a pigment and a pigment dispersing agent, wherein the pigment dispersing agent is a comb type resin dispersing agent comprising polyethyleneimine as a main skeleton and a urethane skeleton as a side chain.

### Claim 2 (depends on 1)

The inkjet ink composition according to claim 1, comprising (A) 2-(2-vinyloxyethoxy) ethyl acrylate and (B) N-vinyl caprolactam.

### Claim 3 (depends on 2)

The inkjet ink composition according to claim 2, wherein a content of (B) N-vinyl caprolactam is 3 to 40% by weight based on a total weight of the ink composition.

### Claim 4 (depends on 1)

The inkjet ink composition according to claim 1, comprising (A), (B) and (C).

### Claim 5 (depends on 2)

The inkjet ink composition according to claim 2, further comprising (D) a polyfunctional acrylate monomer with a functionality of 3 or more.

### Claim 6 (depends on 1)

The inkjet ink composition according to claim 1, wherein the urethane skeleton in the comb type resin dispersing comprises a component comprising tolylene diisocyanate as an isocyanate component and propylene glycol, ethylene glycol, or both, as an alcohol component.

### Claim 7 (depends on 1)

The inkjet ink composition according to claim 1, having a viscosity at 25° C. of 5 to 14 mPa·s.

### Claim 8 (depends on 1)

A printed material obtained by printing the ink composition according to claim 1 on a substrate.

### Claim 9 (depends on 3)

The inkjet ink composition according to claim 3, further comprising (D) a polyfunctional acrylate monomer with a functionality of 3 or more.

### Claim 10 (depends on 4)

The inkjet ink composition according to claim 4, further comprising (D) a polyfunctional acrylate monomer with a functionality of 3 or more.

### Claim 11 (depends on 1)

The inkjet ink composition according to claim 1, comprising (A) and (C).

### Claim 12 (depends on 1)

The inkjet ink composition according to claim 1, comprising (B) and (C).