Resin composition for stereolithography

A resin composition for stereolithography comprising (1) a liquid photohardenable resin composition comprising an epoxy photohardenable resin composition and a monofunctional or polyfunctional (meth)acrylate monomer, at least one photo-polymerizable compound selected from the group consisting of aliphatic diepoxy compounds, alicyclic diepoxy compounds and aromatic diepoxy compounds, and a photo-initiator for polymerization, and (2) at least one radiation energy absorber in an amount of from 0.001 to 1.0% by weight based on the total amount of said liquid photohardenable resin composition (1), wherein said at least one radiation energy absorber (2) has an absorbance in a wavelength region of from 300 to 350 nm of at least 0.1 when measuring a solution obtained by dissolving 1 mg of said at least one radiation energy absorber in 100 ml of ethanol which is placed in a quartz cell having a light path length of 10 mm and said at least one radiation energy absorber (2) is selected from the group consisting of:

• (i) a benzotriazole compound represented by the formula (I):
• ##STR6## wherein R.sup.1 and R.sup.2 are independently selected from the group consisting of a hydrogen atom, linear or branched chain substituted or unsubstituted alkyl groups having from 1 to 20 carbon atoms, and substituted or unsubstituted phenyl groups;
• and X is a hydrogen atom or a halogen atom;
• (ii) a benzophenone compound represented by formula (II):
• ##STR7## wherein R.sup.3 and R.sup.4 are independently selected from the group consisting of a hydrogen atom, linear or branched chain substituted or unsubstituted alkyl groups having from 1 to 20 carbon atoms, and substituted or unsubstituted phenyl groups;
• a is 0 or 1;
• and b is 0 or 1;
• (iii) a phenyl salicylate compound is represented by formula (III):
• ##STR8## wherein R.sup.5 is selected from the group consisting of a hydrogen atom, linear or branched chain substituted or unsubstituted alkyl groups having from 1 to 20 carbon atoms, and substituted or unsubstituted phenyl groups;
• and
• (iv) a cyanoacrylate compound represented by formula (IV):
• ##STR9## wherein R.sup.6 and R.sup.7 are independently selected from the group consisting of a hydrogen atom, linear or branched chain substituted or unsubstituted alkyl groups having from 1 to 20 carbon atoms, and substituted or unsubstituted phenyl groups;
• and R.sup.8 is a linear or branched chain alkyl group having from 1 to 20 carbon atoms.