Photocurable resin composition, method for preparing the same, and optical film comprising the same

A method of preparing a photocurable resin composition, the method comprising:

• (S1) the step of removing moisture from a mixture of a (meth)acrylate compound (A);
• a thiol compound containing two or more mercapto groups in one molecule (B);
• and a photoinitiator (C);
• an organophosphate-based (meth)acrylate represented by following Chemical Formula 1;
• and a phenolic compound represented by following Chemical Formula 2 or 3, or a phosphate compound represented by following Chemical Formula 4 and containing phenolic —OH:
• in Chemical Formula 1, R1 is selected from following Chemical Formulas 1-1 to 1-4, R2 is hydrogen or methyl, and n is an integer of 1 to 3:
• in Chemical Formulas 1-1 to 1-4, X may be each independently same or different and is an integer of 0 to 10;
• in Chemical Formulas 2 and 3, R3 to R9 may be each independently same or different and are hydrogen, —OH, —COOH, a straight or branched C1 to C10 alkyl, a straight or branched C1 to C10 alkoxyalkyl, or a straight or branched C1 to C10 alkyl containing an ester group;
• in Chemical Formula 4, R1 to R5 each independently represent hydrogen, an alkyl group having 3 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, X1 is a direct bond, oxygen, sulfur, or an alkylene group having 1 to 8 carbon atoms, X2 is an alkylene group having 2 to 8 carbon atoms, and at least one of X3 and X4 is always a hydroxyl group and is hydrogen, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms.