| abstract |
(57) [Summary] [Structure] Aromatic epoxy resin derivative having 0.3 to 10 mol of polymerizable unsaturated group and 0.1 to 3 mol of aprotic onium salt-containing group in 1 kg of resin, and photopolymerization When a photopolymerizable composition consisting of an initiator is formed into a coating film on a substrate and the coating film is dried, the photopolymerizable composition coating film photocured by actinic rays is peeled off, as a peeling liquid, Water 100 1 to 10 parts by weight of sodium hydroxide or potassium hydroxide based on parts by weight, chains of ethylene glycol monoalkyl ether, diethylene glycol monoalkyl ether, or propylene glycol monoalkyl ether, dipropylene glycol monoalkyl ether monoalkyl ether 10-5 for compounds with length 3-6 A stripping solution containing 0 part by weight is used. In addition, a nonionic surfactant having an HLB of 8 to 18 is added to the stripping solution in an amount of 0.1 to 5 You may add a weight part. [Effect] The coating film of the photopolymerizable composition can be safely and easily peeled from the substrate. |