US 12,379,664 B2
Photosensitive ink composition, cured product, display panel, and method for producing cured product
Hiroki Chisaka, Kawasaki (JP); Wataru Suzuki, Kawasaki (JP); and Koichi Misumi, Kawasaki (JP)
Assigned to TOKYO OHKA KOGYO CO., LTD., Kawasaki (JP)
Appl. No. 17/756,390
Filed by TOKYO OHKA KOGYO CO., LTD., Kawasaki (JP)
PCT Filed Nov. 20, 2020, PCT No. PCT/JP2020/043505
§ 371(c)(1), (2) Date May 24, 2022,
PCT Pub. No. WO2021/106806, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 2019-215872 (JP), filed on Nov. 28, 2019.
Prior Publication US 2022/0404709 A1, Dec. 22, 2022
Int. Cl. G03F 7/20 (2006.01); G03F 7/031 (2006.01)
CPC G03F 7/2018 (2013.01) [G03F 7/031 (2013.01)] 14 Claims
 
1. A photosensitive ink composition comprising a photopolymerizable compound (A), and a photopolymerization initiator (C), and optionally comprising a solvent(S),
wherein the photopolymerizable compound (A) consists of a sulfide compound (A1) represented by the following formula (a-1) and a (meth)acrylate compound (A2) represented by the following formula (a-2),
wherein the photopolymerization initiator (C) is a combination of a phosphine oxide compound (C1) and an oxime ester compound (C2), and
a ratio of a mass W2 of the oxime ester compound (C2) is 40% by mass or more and 90% by mass or less relative to the sum of a mass W1 of the phosphine oxide compound (C1) and the mass W2 of the oxime ester compound (C2),

OG Complex Work Unit Chemistry
wherein, in the formula (a-1), R1 and R2 are each independently a hydrogen atom or a methyl group, R3 and R4 are each independently an alkyl group having 1 or more and 5 or less carbon atoms, and p and q are each independently 0 or 1:

OG Complex Work Unit Chemistry
wherein, in the formula (a-2), R10 is a hydrogen atom or a methyl group, R11 is an alkylene group having 1 or more and 3 or less carbon atoms, R12 is a single bond, an oxygen atom, or a sulfur atom, R13 is an alkyl group having 1 or more and 4 or less carbon atoms, an alkoxy group having 1 or more and 4 or less carbon atoms, a phenoxy group, or a phenyl group, s is an integer of 0 or more and 5 or less, and t is 0, 1 or 2
wherein the phosphine oxide compound (C1) is selected from the group consisting of bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, and ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate, and
wherein the oxime ester compound (C2) comprises a compound represented by the following formula (C2-1),

OG Complex Work Unit Chemistry