Photocurable composition for 3D printer for producing patient-customized cast

A photocurable composition for 3D printing for producing a patient-specific splint or cast using 3D printing, the composition comprising:

• a UV-curable polyurethane oligomer represented by the following Formula 1;
• a photoinitiator;
• a silane coupling agent;
• an oligomer;
• and a stabilizer, wherein the patient-specific splint or cast has a tensile strength of 50 to 60 N/m2 and a flexural strength of 60 to 75 N/m2:
• wherein
• A and A′ are each a substituent represented by Formula 2 above;
• n, m, o, p, q and r are the same or different and are each independently an integer ranging from 1 to 100;
• L1 and L2 are the same or different and are each independently a substituted or unsubstituted alkylene group having 1 to 200 carbon atoms, a substituted or unsubstituted arylene group having 6 to 200 carbon atoms, a substituted or unsubstituted heteroarylene group having 5 to 200 nuclear atoms, or a substituted or unsubstituted cycloalkylene group having 3 to 200 carbon atoms;
• R1 to R8 are the same or different and are each independently selected from the group consisting of hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxyl group, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 24 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms, a substituted or unsubstituted heteroarylalkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms, a substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkylamino group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylamino group having 2 to 24 carbon atoms, a substituted or unsubstituted alkylsilyl group having 1 to 30 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 carbon atoms, and a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms;
• and
• the substituted alkylene group, the substituted arylene group, the substituted heteroarylene group, the substituted cycloalkylene group, the substituted alkyl group, the substituted cycloalkyl group, the substituted alkenyl group, the substituted alkynyl group, the substituted aralkyl group, the substituted aryl group, the substituted heteroaryl group, the substituted heteroarylalkyl group, the substituted alkoxy group, the substituted alkylamino group, the substituted arylamino group, the substituted aralkylamino group, the substituted heteroarylamino group, the substituted alkylsilyl group, the substituted arylsilyl group and the substituted aryloxy group are substituted with one or more substituents selected from the group consisting of hydrogen, deuterium, a cyano group, a nitro group, a halogen group, a hydroxyl group, an alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, an alkynyl group having 2 to 24 carbon atoms, an aralkyl group having 7 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 5 to 60 nuclear atoms, a heteroarylalkyl group having 6 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, an alkyl amino group having 1 to 30 carbon atoms, an arylamino group having 6 to 30 carbon atoms, an aralkylamino group having 6 to 30 carbon atoms, a heteroarylamino group having 2 to 24 carbon atoms, an alkylsilyl group having 1 to 30 carbon atoms, an arylsilyl group having 6 to 30 carbon atoms, and an aryloxy group having 6 to 30 carbon atoms, and when they are substituted with a plurality of substituents, these substituents are the same or different.