US 9,809,723 B2
Active energy ray-curable inkjet ink composition
Mayuko Okamoto, Tokyo (JP); Tohru Konno, Tokyo (JP); and Kazuhiro Jonai, Tokyo (JP)
Assigned to TOYO INK SC HOLDINGS CO., LTD., Chuo-ku (JP); and TOYO INK CO., LTD., Chuo-ku (JP)
Filed by TOYO INK SC HOLDINGS CO., LTD., Chuo-ku (JP); and TOYO INK CO., LTD., Chuo-ku (JP)
Filed on Sep. 11, 2013, as Appl. No. 14/24,038.
Claims priority of application No. 2012-199040 (JP), filed on Sep. 11, 2012; and application No. 2012-199041 (JP), filed on Sep. 11, 2012.
Prior Publication US 2014/0069294 A1, Mar. 13, 2014
Int. Cl. C09D 11/10 (2014.01); C09D 11/30 (2014.01); C08J 3/28 (2006.01); C09D 11/322 (2014.01); C09D 11/101 (2014.01)
CPC C09D 11/322 (2013.01) [C09D 11/101 (2013.01)] 5 Claims
 
1. An active energy ray-curable inkjet ink, which comprises an isoindoline-based pigment having a specific electric conductance measured by DIN ISO 787/14 of 150 μS/cm or less, wherein the isoindoline-based pigment is C. I. Pigment Yellow 185, and
a monomer having EO or PO as a skeleton in an amount of 60 to 90% by weight in the ink, wherein the monomer having EO or PO as a skeleton is selected from the group consisting of 2-(2-vinyloxyethoxy)ethyl acrylate and dipropylene glycol diacrylate, and
wherein the isoindoline-based pigment comprises a pigment precursor and a by-product in an amount of 5% by weight or less.