| 摘要 |
PROBLEM TO BE SOLVED: To provide a photosensitive resin composition having excellent transparency and storage stability and having a high curing rate by active energy rays, from which a printing plate material suitable for a flexographic printing plate having high hardness can be produced.SOLUTION: The photosensitive resin composition comprises: a solid block copolymer (A) having at least one polymer block a1 comprising an aromatic vinyl compound unit and at least one polymer block a2 comprising a conjugate diene unit; and with respect to 100 parts by mass of the solid block copolymer (A), 5 to 100 parts by mass of a liquid diene rubber (B); 1 to 50 parts by mass of a (meth)acrylate monomer (C); and 0.1 to 20 parts by mass of an active energy ray polymerization initiator (D). The liquid diene rubber (B) shows a melt viscosity ranging from 0.1 to 3,000 Pa s measured at 38°C. In the photosensitive resin composition, a catalyst residue amount derived from a polymerization catalyst used for the production of the liquid diene rubber (B) is in a range from 0 to 200 ppm in terms of metals. |
