	US 12,443,106 B2
	Aqueous developer for flexographic printing plate and manufacturing method of flexographic printing plate
Masato Shirakawa, Haibara-gun (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Feb. 27, 2023, as Appl. No. 18/175,053.
Application 18/175,053 is a continuation of application No. PCT/JP2021/031456, filed on Aug. 27, 2021.
Claims priority of application No. 2020-144071 (JP), filed on Aug. 28, 2020.
Prior Publication US 2023/0221647 A1, Jul. 13, 2023
Int. Cl. G03F 7/20 (2006.01); G03F 7/30 (2006.01); G03F 7/32 (2006.01)

CPC G03F 7/2012 (2013.01) [G03F 7/3057 (2013.01); G03F 7/322 (2013.01)]

7 Claims

1. An aqueous developer for a flexographic printing plate, comprising:

a nonionic surfactant represented by Formula (1);

an anionic surfactant represented by Formula (2); and

water,

R¹O-(AO)_n—H (1)

here, in Formula (1),

R¹represents a linear aliphatic hydrocarbon group having 9 to 30 carbon atoms,

and wherein R¹in Formula (1) has an ethylenically unsaturated double bond,

A represents an alkylene group having 2 to 4 carbon atoms, and

n represents an integer of 7 or more, in which in a case where n is an integer of 7 or more, a plurality of A's may be the same or different from each other, and

a content of the nonionic surfactant is 0.5% to 5% by mass,

R²—X (2)

here, in Formula (2),

R²represents an aliphatic hydrocarbon group having 7 to 15 carbon atoms, and

X represents a carboxylic acid group or a salt of the carboxylic acid group, a sulfonic acid group or a salt of the sulfonic acid group, a sulfate group or a salt of the sulfate group, or a phosphoric acid group or a salt of the phosphoric acid group.