| abstract |
(57) [Summary] [Structure] A copolymer of styrene and maleic anhydride and / or an esterified product of 35 to 50% of the copolymer, and two or more (meth) acrylic acid ester groups in the molecular chain. A photopolymerizable composition containing a cross-linking agent having: and a photopolymerization initiator in a specific content ratio. [Effect] The photopolymerizable composition of the present invention has high adhesiveness to stainless steel, glass substrates and the like, can be developed with a weak alkaline aqueous solution, and has good image forming property. Further, since it has excellent durability and alkali resistance by heat curing, it is extremely useful as a material for a photoresist, a product requiring a fine structure, a protective film, and the like. |