US 11,912,881 B2
Ink composition for photo-curable ink jet printing
Okinori Nakashima, Osaka (JP); Takuya Myose, Osaka (JP); and Kazuhiro Fuke, Osaka (JP)
Assigned to SAKATA INX CORPORATION, Osaka (JP)
Appl. No. 17/298,318
Filed by SAKATA INX CORPORATION, Osaka (JP)
PCT Filed Oct. 1, 2019, PCT No. PCT/JP2019/038724
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/137067, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-241265 (JP), filed on Dec. 25, 2018.
Prior Publication US 2022/0041879 A1, Feb. 10, 2022
Int. Cl. C09D 11/38 (2014.01); C09D 11/101 (2014.01); C09D 11/107 (2014.01)
CPC C09D 11/38 (2013.01) [C09D 11/101 (2013.01); C09D 11/107 (2013.01)] 4 Claims
 
1. An ink composition for photo-curable ink jet printing, comprising:
(A) at least one selected from the group consisting of hexanediol acrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, and hydroxy pivalic acid neopentyl glycol diacrylate;
(B) at least one of vinyl amide monomer and acryloyl amine monomer;
(C) an acrylated amine compound having two photopolymerizable functional groups and two amino groups in a molecule; and
(D) a monofunctional monomer; and a photopolymerization initiator,
wherein the monofunctional monomer of the (D) component excludes vinyl amide monomer of the (B) component,
wherein a content of the (A) component is 51.10 to 70% by mass in the ink composition for photo-curable ink jet printing,
wherein a content of the (B) component is 5 to 20% by mass in the ink composition for photo-curable ink jet printing,
wherein a content of the (C) component is 0.1 to 15% by mass in the ink composition for photo-curable ink jet printing,
wherein a content of the (D) component is 5 to 16.8% by mass in the ink composition for photo-curable ink jet printing, and
wherein a viscosity at 25° C. is 200 mPa·s or less.