US 11,982,941 B2
Flexographic printing plate precursor
Koji Morihara, Aichi (JP); Hideyuki Hashimoto, Aichi (JP); Daisuke Inoue, Aichi (JP); Koki Matsuoka, Aichi (JP); and Yasuyuki Hayasaki, Aichi (JP)
Assigned to Sumitomo Riko Company Limited, Aichi (JP)
Filed by Sumitomo Riko Company Limited, Aichi (JP)
Filed on Apr. 10, 2020, as Appl. No. 16/845,096.
Application 16/845,096 is a continuation of application No. PCT/JP2018/039841, filed on Oct. 26, 2018.
Claims priority of application No. 2017-248644 (JP), filed on Dec. 26, 2017.
Prior Publication US 2020/0241416 A1, Jul. 30, 2020
Int. Cl. G03F 7/033 (2006.01); B41N 1/00 (2006.01)
CPC G03F 7/033 (2013.01) [B41N 1/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A flexographic printing plate precursor, comprising:
a photosensitive layer, comprising (A) a water-dispersed latex, (B) a millable rubber, (C) a surfactant, (D) photopolymerizable compounds, and (E) a photopolymerization initiator,
wherein the (D) comprises following (d1) to (d3), and the (d1) is a compound represented by formula (1) and the (d2) is a compound represented by formula (2),
(d1) a photopolymerizable compound of a chain structure having no cyclic structure,
(d2) a monofunctional photopolymerizable compound having a cyclic structure, and
(d3) a bifunctional photopolymerizable compound having a cyclic structure, wherein the (d3) is tricyclodecane dimethanol diacrylate or tricyclodecane dimethanol dimethacrylate,

OG Complex Work Unit Chemistry
in the formula (1), R1 represents a hydrogen group or a methyl group, R2 represents a hydrogen group or a methyl group, and R3 represents a linear or branched hydrocarbon group having a carbon number of 4 to 12,

OG Complex Work Unit Chemistry
in the formula (2), R4 represents a hydrogen group or a methyl group, and R5 represents a cyclic structure composed of hydrocarbon or a cyclic structure composed of carbon, hydrogen and oxygen,
wherein a total amount of the (d1) to (d3) is within a range of 7.5 to 19 mass % with respect to an entire amount of the photosensitive layer, a content of the (d1) is within a range of 38 to 67 mass % with respect to the total amount of the (d1) to (d3), a content of the (d2) is within a range of 12 to 46 mass % with respect to the total amount of the (d1) to (d3), and a content of the (d3) is within a range of 9 to 46 mass % with respect to the total amount of the (d1) to (d3).