Optical recording medium, substrate for optical recording medium

Details Optical recording medium, substrate for optical recording medium Optical recording medium, substrate for optical recording medium

1993-06-16

1996-04-02

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428195, 4284111, 428412, 428913, 3461351, B32B 302

Patent

active

055038883

ABSTRACT:
An optical recording medium is disclosed which comprises a substrate containing a polycarbonate resin and a recording layer. The substrate contains copolycarbonate resin having constitutional units represented by the formulae (x) and (y) ##STR1## wherein Z of the formula (x) is a direct bond, alkylidene, --O--, --S-- or --SO.sub.2 --; X is H, halogen, alkyl, aryl, aralkyl, alkoxy, aryloxy or aralkyloxy; R.sub.1 is H, alkyl or aralkyl; m is an integer of 1 to 3; Y of the formula (y) is alkylidene, aryl-substituted alkylene, aryl, --O--, --S--, --CO-- or --SO.sub.2 --; and each of R.sub.2, R.sub.3, R.sub.4 and R.sub.5 is H, halogen or alkyl!.

REFERENCES:
patent: 1466733 (1923-09-01), Sulzer et al.
patent: 3751550 (1973-08-01), Nauta
patent: 3756760 (1973-09-01), McBride
patent: 3839514 (1974-10-01), Nauta
patent: 4790893 (1988-12-01), Watkins
patent: 4836874 (1989-06-01), Foster
patent: 4871601 (1989-10-01), Miura et al.
patent: 4952664 (1990-08-01), Masumoto et al.
patent: 4954380 (1990-09-01), Kanome et al.
patent: 4965118 (1990-10-01), Kodera et al.
patent: 4965153 (1990-10-01), Imataki et al.
patent: 4968370 (1990-11-01), Watkins
patent: 4997744 (1991-03-01), Kalyanaraman et al.
patent: 4997903 (1991-03-01), Okamoto
patent: 5026623 (1991-06-01), Imataki et al.
patent: 5075060 (1991-12-01), Imataki
patent: 5137661 (1992-08-01), Kanome et al.
patent: 5158859 (1992-10-01), Imatake et al.
Patent Abstracts of Japan, vol. 11, No. 106 (Apr. 3, 1987).
Patent Abstracts of Japan, vol. 15, No. 151 (Apr. 16, 1991).
Database WPI, Section EI, Week 8838, Derwent Publications Ltd., Class T03, AN 88-266722.
Database WPI, Section CH, Week 8521, Derwent Publications Ltd., Class E05, AN 85-126083.
Patent Abstracts of Japan, vol. 15, No. 173, p. 86 (May 2, 1991).
Chemical Abstracts Ca 115(8):72490A Kanayama, JP 91-039326 Polycarbonate Resins.

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