IP Library › Granted Patent US 8,507,573
Granted Patent B2
US 8,507,573 · App. 13/171,938 · Granted Aug 13, 2013

Active energy ray curable inkjet ink composition

Inventors: Yuji Kameyama (Tokyo, JP); Norio Suzuki (Tokyo, JP); Yohei Konda (Tokyo, JP); Kazuhiro Jonai (Tokyo, JP)
Assignees: Toyo Ink SC Holdings Co., Ltd.; Toyo Ink Co., Ltd.
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Quick Facts
Patent No.
US 8,507,573
App. No.
13/171,938
Granted
Aug 13, 2013
Kind
B2
Abstract

There is provided an inkjet ink which has satisfactory storage stability and inkjet ejection stability, exhibits excellent curability, and is capable of forming high quality images on coated paper by an inkjet system. Disclosed is an active energy ray curable inkjet ink composition comprising: 15-75% by weight of at least one polymerizable bifunctional monomer selected from the group consisting of dipropylene glycol diacrylate and 1,9-nonanediol diacrylate; and 1% by weight to 10% by weight of [4-(methylphenylthio)phenyl]phenylmethanone as a photopolymerization initiator.

Claims (9)

1. An active energy ray curable inkjet ink composition comprising:

15% by weight to 75% by weight of at least one polymerizable bifunctional monomer selected from the group consisting of dipropylene glycol diacrylate and 1,9-nonanediol diacrylate; and

1% by weight to 10% by weight of [4-(methylphenylthio)phenyl]phenylmethanone as a photopolymerization initiator.

2. The active energy ray curable inkjet ink composition according to claim 1 , further comprising: 3% by weight to 40% by weight of N-vinylcaprolactam as a polymerizable monofunctional monomer.

3. The active energy ray curable inkjet ink composition according to claim 1 , further comprising: 3% by weight to 40% by weight of at least one monomer selected from the group consisting of isobornyl acrylate and lauryl acrylate as a polymerizable monofunctional monomer.

4. The active energy ray curable inkjet ink composition according to claim 1 , further comprising: an acrylic surface control agent as a surface control agent.

5. The active energy ray curable inkjet ink composition according to claim 1 , further comprising:

ethyl-4-dimethylaminobenzoate as a sensitizer based on [4-(methylphenylthio)phenyl]phenylmethanone at a weight ratio of [4-(methylphenylthio)phenyl]phenylmethanone:ethyl-4-dimethylaminobenzoate=1:0.1 to 1:5.

6. The active energy ray curable inkjet ink composition according to claim 1 , further comprising: phenothiazine as a polymerization inhibitor.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 6, 2021
From: TOYO INK CO., LTD.
To: TOYOCOLOR CO., LTD.
Reel/Frame 054836/0170 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 14, 2011
From: KAMEYAMA, YUJI; SUZUKI, NORIO; KONDA, YOHEI; JONAI, KAZUHIRO
To: TOYO INK SC HOLDINGS CO., LTD.; TOYO INK CO., LTD.
Reel/Frame 026903/0847 →
Priority Claims (1)
JP P2010-149642 · Jun 30, 2010 · national
Continuity (1)
Related Publication 20120003435A1 · Jan 5, 2012