US 12,297,363 B2
Active energy ray-curable inkjet printing ink composition
Okinori Nakashima, Osaka (JP); Takuya Myose, Osaka (JP); and Jun Kawabata, Osaka (JP)
Assigned to SAKATA INX CORPORATION, Osaka (JP)
Appl. No. 18/005,586
Filed by SAKATA INX CORPORATION, Osaka (JP)
PCT Filed Jul. 8, 2021, PCT No. PCT/JP2021/025776
§ 371(c)(1), (2) Date May 25, 2023,
PCT Pub. No. WO2022/024706, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-128740 (JP), filed on Jul. 29, 2020.
Prior Publication US 2023/0287229 A1, Sep. 14, 2023
Int. Cl. C09D 11/38 (2014.01); C09D 11/32 (2014.01); B41M 5/00 (2006.01); C09D 11/101 (2014.01)
CPC C09D 11/38 (2013.01) [C09D 11/32 (2013.01); B41M 5/0023 (2013.01); C09D 11/101 (2013.01)] 20 Claims
 
1. An active energy ray-curable inkjet printing ink composition satisfying requirements A to E below:
(A) a content of amine-modified oligomer is 1.0 to 20.0% by mass in the active energy ray-curable inkjet printing ink composition;
(B) alkoxy group-containing (meth)acrylate monomers are contained by 2.0 to 20.0% by mass in the active energy ray-curable inkjet printing ink composition;
(C) (meth)acrylate monomers having an alkyl group with 6 to 20 carbon atoms are contained by 2.0 to 25.0% by mass in the active energy ray-curable inkjet printing ink composition;
(D) at least one compound selected from a group that consists of 1,6-hexanediol diacrylate, 3-methyl-1,5-pentanediol diacrylate, dipropylene glycol diacrylate, 1,10-decanediol diacrylate, propoxylated(2)neopentyl glycol diacrylate, and hydroxypivalic acid neopentyl glycol diacrylate is contained by 30.0 to 60.0% by mass in the active energy ray-curable inkjet printing ink composition;
(E) as photopolymerization initiators, ethoxy(2,4,6-trimethylbenzoyl)phenylphosphine oxide is contained by 3.0 to 15.0% by mass in the active energy ray-curable inkjet printing ink composition, and oligo(2-hydroxy-2-methyl-1-(4-(1-methylvinyl)phenyl)propanone) and/or 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl)phenoxy]phenyl}-2-methylpropanone is/are contained by 2.0 to 10.0% by mass in the active energy ray-curable inkjet printing ink composition, where a total content of photopolymerization initiators is 6.0 to 25.0% by mass in the active energy ray-curable inkjet printing ink composition.