Phosphorus-based releasing agent, optical polymerizable composition comprising same and preparation thereof

A polymerizable composition for an optical use, which comprises a thiol compound;

• an isocyanate compound;
• and
• a phosphorus-based mold releasing agent,
• wherein the phosphorus-based mold releasing agent comprises a first phosphorus-based compound having one hydroxyl group and a second phosphorus-based compound having two hydroxy groups,
• the first phosphorus-based compound is a compound represented by the following Formula 1, and the second phosphorus-based compound is a compound represented by the following Formula 2:
• wherein in the above Formulae, R1 to R3 are each independently C1-30 alkyl, C6-30 aryl, C7-30 aralkyl, C7-30 alkylaryl, or C8-30 alkylaralkyl, and
• at least one of R1 to R3 is a compound represented by the following Formula 5:
• and wherein in the above Formulae, R4 is C6-30 arylene, C7-30 aralkylene, C7-30 alkylarylene, or C8-30 alkylaralkylene, and
• R5 is C6-30 aryl, C7-30 aralkyl, C7-30 alkylaryl, or C8-30 alkylaralkyl.

A phosphorus-based mold releasing agent, which comprises a first phosphorus-based compound having one hydroxyl group and a second phosphorus-based compound having two hydroxy groups,

• wherein the first phosphorus-based compound is a compound represented by the following Formula 1, the second phosphorus-based compound is a compound represented by the following Formula 2, and the molar ratio of the first phosphorus-based compound to the second phosphorus-based compound is 0.5:1 to 1:1:
• wherein in the above Formulae, R1 to R3 are each independently C1-30 alkyl, C6-30 aryl, C7-30 aralkyl, C7-30 alkylaryl, or C8-30 alkylaralkyl, and
• wherein at least one of R1 to R3 is a group represented by the following Formula 5:
• wherein, in the above Formula, R4 is C6-30 arylene, C7-30 aralkylene, C7-30 alkylarylene, or C8-30 alkylaralkylene, and
• R5 is C6-30 aryl, C7-30 aralkyl, C7-30 alkylaryl, or C8-30 alkylaralkyl.