Patent ID: 6060577
Filing Date: 2000-05-09
Classification: C08G,C08L,G11B

Abstract:
An optical article comprising(1) from 90 to 100% by weight of a polycarbonate having structural units of the formula ##STR16## wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of C.sub.1 -C.sub.6 alkyl;X represents CH.sub.2 ;m is an integer from 4 to 7;n is an integer from 1 to 4; andp is an integer from 1 to 4with the proviso that at least one of R.sub.1 or R.sub.2 is in the 3 or 3' position; and wherein the structural units of formula (I) comprise from 90 to 100 mol % of the polycarbonate; where the polycarbonate has a glass transition temperature of from about 120.degree. C. to about 185.degree. C. and a water absorption of below about 0.33%; and(2) from 0 to 10% by weight of further additives.