Optical disk grade copolyestercarbonates derived from hydroxyphe

Details Optical disk grade copolyestercarbonates derived from hydroxyphe Optical disk grade copolyestercarbonates derived from hydroxyphe

1997-09-02

1999-01-12

Acquah, Samuel A.

Dynamic information storage or retrieval

Storage medium structure

Specified material

528 10, 528 26, 528 29, 528 86, 528176, 528193, 528201, 528204, 528206, 528219, 525474, G11B 370, C08G 6400

Patent

active

058598332

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.

REFERENCES:
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patent: 4988785 (1991-01-01), Paul
patent: 5204377 (1993-04-01), Fukawa et al.
patent: 5266659 (1993-11-01), Sivaram et al.
patent: 5288838 (1994-02-01), Sivaram et al.
"Polymerization by Phase Transfer Catalysis", by L. H. Tagle et al., Polymer Bulletin 28, 645-652 (1992).

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