Photocurable Ink Composition, Ink Jet Recording Method, and Recording Matter

• US 20090280302A1
• Filed: 08/08/2008
• Published: 11/12/2009
• Est. Priority Date: 08/08/2007
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Fukumoto, Hiroshi, Oyanagi, Takashi, Nakano, Keitaro
• Granted Patent: US 8,192,804 B2
• Time in Patent Office: Days
• US Class Current: 428/195.100
• CPC Class Codes: B41M 5/0023 Digital printing methods characterised by the inks used inks per se C09D11/00
• CPC Class Codes: 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
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Abstract

A photocurable ink composition includes a dendritic polymer, a monomer expressed by CH₂═CR¹—COO—R²—O—CH═CH—R³ (R¹ denotes a hydrogen atom or a methyl group, R² denotes an organic residue having a carbon number of 2 to 20, and R³ denotes a hydrogen atom or an organic residue having a carbon number of 1 to 11), and a photo-polymerization initiator.

Claims

1. A photocurable ink composition comprising a dendritic polymer;

a monomer expressed by CH₂═

CR¹—

COO—

R²—

O—

CH═

CH—

R³ (R¹ denotes a hydrogen atom or a methyl group, R² denotes an organic residue having a carbon number of 2 to 20, and R³ denotes a hydrogen atom or an organic residue having a carbon number of 1 to

     11); and

a photo-polymerization initiator.

2. The photocurable ink composition according to claim 1, wherein the dendritic polymer is a dendrimer and/or a hyperbranched polymer.

3. The photocurable ink composition according to claim 1, wherein the monomer is 2-(vinyloxyethoxy)ethyl acrylate and/or 2-(vinyloxyethoxy)ethyl methacrylate.

4. The photocurable ink composition according to claim 1, wherein the concentration of the dendritic polymer is in a range from 3% by weight to 30% by weight.

5. The photocurable ink composition according to claim 1, further comprising a coloring material.

6. The photocurable ink composition according to claim 1, wherein the photopolymerization initiator is obtained by mixing any one kind or two or more kinds of α

-aminoketone, α

-hydroxyketone, and acylphosphine oxide.

7. An ink jet recording method comprising performing recording using the photocurable ink composition according to claim 1.

8. A recorded material recorded using the photo-curable ink composition according to claim 1.