Copolymerizable composition for high refractive optical lens comprising thioepoxy, polyisocyanate a

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PURPOSE : A copolymer optical lens with excellent surface precision and a manufacturing method thereof are provided to minimize the surface ring failure phenomenon in high power lenses with large radius curvature.CONSTITUTION : A copolymer composition for a high-refractive optical lens contains a thio epoxy compound, a polyisocyanate compound, and bis (2-mercaptoethyl) sulfide. The thio epoxy compound is selected from a group consisting of bis (2, 3-epithiopropyl) sulfide, bis (2, 3-epithiopropyl) disulfide, (2, 3-epithiopropyl) (2, 3-epithiopropyl) sulfide, 2, 3-epidithiopropyl (2, 3-epithiopropyl) disulfide, 1, 3- and 1, 4-bis (beta-epithiopropylthio) cyclohexane, 1, 3- and 1, 4-bis (beta-epithiopropylthiomethyl) cyclohexane, 2, 5-bis (beta-epithiopropylthiomethyl)-1, 4-dithiane, and 2, 5-bis (beta-epithiopropylthioethyl thiomethyl)-1, 4-dithiane, and 2- (2-beta-epithiopropylthioethyl thio)-1, 3-bis propane. The copolymer composition contains a phosphate ester compound as an internal release agent.COPYRIGHT KIPO 2013