PRODUCTION OF URETHANE PLASTIC LENS AND URETHANE PLASTIC LENS OBTAINED THEREBY

摘要

PROBLEM TO BE SOLVED: To produce a urethane plastic lens improved in workability without detriment to productivity. SOLUTION: This lens is prepared by mixing at least one ester compound selected from among isocyanate compounds, isothiocyanate compounds and isocyanato thioisocyanate compounds with at least one active hydrogen compound selected from among hydroxy compounds, mercapto compounds and mercapto hydroxy compounds and heating the obtained mixture in the presence of a urethane formation catalyst.