Three-dimensional-forming photo-curable composition, method for producing three-dimensional article from the photo-curable composition, and resin

A three-dimensional-forming photo-curable composition comprising a (meth)acrylic compound having a (meth)acryloyl group;

• a photo-radical generator;
• and
• a polyrotaxane having a plurality of cyclic molecules having at least one of a (meth)acryloyl group and a hydroxyl group,
• wherein the (meth)acrylic compound includes a blocked isocyanate represented by a general formula (1) below:
• A-B—C (1)
• (in the formula (1), A and C each independently represent a group represented by a formula (2) below, and B represents a group represented by a formula (3) below:
• (in the formula (2), R1 represents a hydrogen atom or a methyl group, R2 represents a hydrocarbon group that has 1 to 10 carbon atoms and may have a substituent, and L1 represents a divalent hydrocarbon group that has 1 to 10 carbon atoms and may have a substituent;
• in the formula (3), R3 and R4 each represent a hydrocarbon group that has 1 to 20 carbon atoms and may have a substituent, and a is an integer of 1 or more and 100 or less),
• wherein the polyrotaxane has a hydroxyl group, and
• the three-dimensional-forming photo-curable composition comprises a reaction accelerator.