Photosensitive resin composition for flexographic printing

A photosensitive resin composition for flexographic printing, comprising:

• (A) a first styrene-butadiene-styrene block copolymer (SBS),
• wherein
• a weight ratio of the styrene block to the butadiene block is 10:90 to 80:20, and
• a molar ratio of 1,2 bond structures to 1,4 bond structures in the butadiene block is 0:100 to 70:30;
• (B) a second styrene-butadiene-styrene block copolymer (SBS),
• wherein
• a weight ratio of the styrene block to the butadiene block is 10:90 to 80:20, and
• a molar ratio of 1,2 bond structures to 1,4 bond structures in the butadiene block is 80:20 to 100:0;
• (C) a polybutadiene or a derivative thereof,
• wherein
• a molar ratio of 1,2 bond structures to 1,4 bond structures is 80:20 to 100:0;
• (D) a photopolymerizable monomer;
• and
• (E) a photopolymerization initiator,
• comprising 5 to 100 wt % of the second styrene-butadiene-styrene block copolymer (SBS) (B) with respect to the amount of the first styrene-butadiene-styrene block copolymer (SBS) (A),
• comprising 10 to 40 wt % of the polybutadiene or a derivative thereof (C) with respect to the amount of the first styrene-butadiene-styrene block copolymer (SBS) (A),
• comprising 40 to 200 wt % of the photopolymerizable monomer (D) with respect to the amount of the first styrene-butadiene-styrene block copolymer (SBS) (A), and
• comprising 4 to 20 wt % of the photopolymerization initiator (E) with respect to the amount of the first styrene-butadiene-styrene block copolymer (SBS) (A).