Optical disk grade copolyestercarbonates derived from hydroxyphenylindanols
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United States of America Patent
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Jan 12, 1999
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N/A
app pub date -
Sep 2, 1997
filing date -
Sep 2, 1997
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Abstract
Copolycarbonates having low intrinsic birefringence comprise structural units derived from hydroxyphenylindanol, from resorcinol, alkylenedioic acid or eugenolsiloxane, and, optionally, from a bisphenol, preferably bisphenol A. The copolycarbonates are useful for the fabrication of optical data recording media such as compact disks.
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