Patent ID: 6552158
Filing Date: 2003-04-22
Classification: C08G,G11B

Abstract:
An optical disk comprising a polycarbonate layer, wherein the polycarbonate is produced using a bis(hydroxyaryl)cyclohexane selected from the group consisting of the formula: wherein each A1 is independently a divalent substituted or unsubstituted radical; and at least one aromatic dihydroxy compound comonomer of the formula:HOâ€”A2â€”OH, wherein A2 is selected from divalent substituted or unsubstituted aromatic radicals and, wherein the polycarbonate produced comprises a weight average molecular weight of at least about 10,000, a glass transition temperature of at least about 100Â° C., and a percentage elongation of less than about 0.025% relative to its initial length following exposure to nitrogen with a relative humidity of about 100%, at a temperature of about 23Â° C., and for a duration of about 3 hours.