Dimensionally stable polycarbonate articles
AssigneeGeneral Electric Company
InventorsVeeraraghavan Srinivasan, Dibakar Dhara, Rein Mollerus Faber, Gautam Chatterjee, Jan Pleun Lens
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Abstract
The disclosure relates to articles using polycarbonates produced by a melt transesterification polymerization method using bis(hydroxyaryl)cyclohexanes. Such polycarbonates have suitable glass transition temperatures and outstanding dimensional stabilities, thus making them particularly useful for making articles possessing high temperature stability, particularly for use in optical articles such as high density optical data storage and recordable media.
Claims9
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:
- HO—A2—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 100° 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 23° C., and for a duration of about 3 hours.
An optical disk comprising a polycarbonate layer produced using a catalyst composition and a monomer composition, wherein the monomer composition comprises a diphenyl carbonate;
- a bisphenol composition, and an aromatic dihydroxy comonomer compound, wherein the aromatic dihydroxy compound comprises resorcinol, bisphenol A, 4,4′-(1-decylidene)-bisphenol, 2,2-bis(3-sec-butyl-4-hydroxyphenyl)propane, and combinations comprising at least of the foregoing aromatic dihydroxy comonomer cornpounds, and wherein the bisphenol composition comprises at least one bis(hydroxyaryl)cyclohexane selected from the group consisting of:
- wherein each A1 is independently a substituted or unsubstituted divalent aromatic radical.
A display device comprising a polycarbonate protective 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:
- HO—A2—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 100° 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 23° C., and for a duration of about 3 hours.
Dependencies are inferred from the claim text.