Radiation curable ink jet composition and recording method

Inventors: Hitoshi Tsuchiya (Chino, JP); Keitaro Nakano (Matsumoto, JP); Toshiyuki Yoda (Matsumoto, JP)

Assignee: Seiko Epson Corporation

C09D11/101 B41J11/002 C09D11/107 C09D11/30 C09D11/324 C09D11/38

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Quick Facts

Patent No.: US 10,385,224
App. No.: 15/878,570
Granted: Aug 20, 2019
Kind: B2

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Abstract

A radiation curable ink jet composition contains an acrylate oligomer (A), a monofunctional monomer (B), and a predetermined monomer (C), in which the acrylate oligomer (A) has 1 to 3 acryloyl groups, the glass transition temperature of a homopolymer of the monofunctional monomer (B) is −20° C. or more and 30° C. or less, and the content of the monofunctional monomer (B) is 40% by mass or more based on the entire radiation curable ink jet composition.

Claims (60)

1. A radiation curable ink jet composition comprising:

an acrylate oligomer (A);

a monofunctional monomer (B) selected from the group consisting of a methoxy methacrylate homopolymer, a 2-hydroxyethyl acrylate homopolymer, a 2-ethylhexyl methacrylate homopolymer, a 2-hydroxybutyl acrylate homopolymer, a hexyl methacrylate homopolymer, a pentyl methacrylate homopolymer, an iso-propyl acrylate homopolymer, a propyl acrylate homopolymer, a benzyl acrylate homopolymer, a methyl acrylate homopolymer, a lauryl acrylate homopolymer, a hexadecyl methacrylate homopolymer, an ethoxyethyl methacrylate homopolymer, a 2-hydroxy-3-phenoxypropylacrylate homopolymer, an N,N-dimethylaminoethyl acrylate homopolymer, an N,N-dimethyl aminoethyl methacrylate homopolymer, an N,N-diethyl aminoethyl methacrylate homopolymer, a butylmethacrylate homopolymer, a pentyl acrylate homopolymer, a tetradecyl acrylate homopolymer, and a 2-hydroxybutylmethacrylate homopolymer; and

a monomer (C) represented by a following formula (1),

CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3 (1), wherein

in Formula (1), R 1 is a hydrogen atom or a methyl group, R 2 is a divalent organic residue having 2 to 20 carbon atoms, and R 3 is a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms, and wherein

the acrylate oligomer (A) has 1 to 3 acryloyl groups,

a glass transition temperature of a homopolymer of the monofunctional monomer (B) is −20° C. or more and 30° C. or less, and

a content of the monofunctional monomer (B) is 40% by mass or more based on the entire radiation curable ink jet composition.

2. The radiation curable ink jet composition according to claim 1 , wherein

the acrylate oligomer (A) is a urethane acrylate oligomer.

3. The radiation curable ink jet composition according to claim 1 , further comprising

monofunctional (meth)acrylate containing an aromatic ring skeleton different from the monofunctional monomer (B).

4. The radiation curable ink jet composition according to claim 1 , further comprising

an acylphosphine oxide compound as an initiator.

5. The radiation curable ink jet composition according to claim 4 , wherein

a content of the initiator is 3 to 15% by mass based on the entire radiation curable ink jet composition.

6. The radiation curable ink jet composition according to claim 3 , wherein

a content of the monofunctional (meth)acrylate containing an aromatic ring skeleton is 3 to 35% by mass based on the entire radiation curable ink jet composition.

7. The radiation curable ink jet composition according to claim 1 , wherein

the glass transition temperature of the homopolymer of the monofunctional monomer (B) is −20° C. or more and 15° C. or less.

8. A recording method comprising:

adhering the radiation curable ink jet composition according to claim 1 to a target recording medium; and