US 12,435,234 B2
Ink composition
Masaki Inumaru, Yokohama (JP); Yasuma Saito, Yokohama (JP); Koujun Utaka, Yokohama (JP); and Karuna Iwasawa, Yokohama (JP)
Assigned to DNP FINE CHEMICALS CO., LTD., Yokohama (JP)
Appl. No. 18/032,921
Filed by DNP FINE CHEMICALS CO., LTD., Yokohama (JP)
PCT Filed Nov. 15, 2021, PCT No. PCT/JP2021/041961
§ 371(c)(1), (2) Date Apr. 20, 2023,
PCT Pub. No. WO2022/107732, PCT Pub. Date May 27, 2022.
Claims priority of application No. 2020-193725 (JP), filed on Nov. 20, 2020.
Prior Publication US 2023/0399532 A1, Dec. 14, 2023
Int. Cl. C09D 11/38 (2014.01); B41M 5/52 (2006.01); C09D 11/32 (2014.01)
CPC C09D 11/38 (2013.01) [B41M 5/5227 (2013.01); C09D 11/32 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An active energy ray-curable ink composition to be discharged by an inkjet method, comprising:
a polymerizable compound, an ultraviolet absorber, and an antioxidant,
the ultraviolet absorber having a maximum absorption wavelength in a wavelength range of 315 nm or more and 400 nm or less, a medium containing the ultraviolet absorber at a concentration of 20 ppm having an absorbance area Ab in a wavelength range of 315 nm or more and 400 nm or less of 25.0 or more, and
a NOR-type hindered amine compound as a light stabilizer.