| abstract |
An optical lens having a high refractive index and a low birefringence, which can be industrially produced by injection molding. A polycarbonate obtained by carbonating 90 to 5 mol% of a dihydroxy compound represented by the general formula (1) and 10 to 95 mol% of a dihydroxy compound represented by the general formula (2) with a carbonic acid diester. An optical lens made of resin. [Chemical 1] Wherein R 1 , R 2 , R 3 and R 4 are each independently a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxyl group having 1 to 20 carbon atoms, or a cycloalkyl group having 5 to 20 carbon atoms. , A cycloalkoxyl group having 5 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aryloxy group having 6 to 20 carbon atoms, where X is an alkylene group having 2 to 8 carbon atoms and a cyclohexane having 5 to 12 carbon atoms. An alkylene group or an arylene group having 6 to 20 carbon atoms, n and m are integers of 1 to 10.) [Chemical 2] (In the formula, Y is an alkylene group having 1 to 10 carbon atoms or a cycloalkylene group having 4 to 20 carbon atoms.) [Selection figure] None |