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A photosetting polymer composition comprises: a base polymer comprising a denatured copolymer which is produced by reacting a copolymer of maleic anhydride and an unsaturated hydrocarbon compound with a specific aminocarboxylic acid, an alcohol or a cellosolve derivative, and a glycidyl (meth)acryla

A photosetting polymer composition comprises: a base polymer comprising a denatured copolymer which is produced by reacting a copolymer of maleic anhydride and an unsaturated hydrocarbon compound with a specific aminocarboxylic acid, an alcohol or a cellosolve derivative, and a glycidyl (meth)acrylate compound under specific conditions; 5-500 weight parts of a photopolymerizable monomer per 100 weight parts of the base polymer; and 1-50 weight parts of a photopolymerization initiator per 100 weight parts of the base polymer.

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A photosetting composition comprising: a base polymer comprising a base copolymer which is produced by reacting a starting copolymer of maleic anhydride and an unsaturated hydrocarbon compound, with a compound having the formula (I) and a compound having the formula (II): [Figure] (I) HOR2 (II) wher

A photosetting composition comprising: a base polymer comprising a base copolymer which is produced by reacting a starting copolymer of maleic anhydride and an unsaturated hydrocarbon compound, with a compound having the formula (I) and a compound having the formula (II): [Figure] (I) HOR2 (II) wherein R1 is an alkylene group having 1-12 carbon atoms or an aromatic group and R2 is a residue of a saturated compound having 1-12 carbon atoms, to open a portion of acid anhydride rings of the maleic anhydride units of the starting copolymer, heating the resulting copolymer to close a portion of units which have been formed by opening the rings with the compound of the formula (I) to form units having an imido structure, and reacting the resulting copolymer with a compound having the formula (III): [Figure] (III) wherein R3 is an alkylene group having 1-12 carbon atoms or an aromatic group and R4 is hydrogen or methyl, to introduce the acryloyl or methacryloyl group of the compound of the formula (III) into a portion of carboxyl groups of the copolymer which have been formed by the ring-opening reaction and a portion of the acid anhydride rings of the copolymer, said base copolymer containing residual acid anhydride rings of less than 60 molar % based on the number of the acid anhydride rings of the starting copolymer and having an addition ratio of acryloyl or methacryloyl group originating from the compound of formula (III) in terms of [Figure] being not less than 1 molar %; 5-500 weight parts of a photopolymerizable monomer per 100 weight parts of the base copolymer; 1-50 weight parts of a photopolymerization initiator per 100 weight parts of the base polymer.