Optical data carriers and method for producing the same

Details Optical data carriers and method for producing the same Optical data carriers and method for producing the same

2005-02-15

2005-02-15

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270110, C528S196000

Reexamination Certificate

active

06855390

ABSTRACT:
A process for the preparation of optical data carriers made of a particualr polycarbonate is disclosed. The polycarbonate is prepared by the phase boundary process that entails reacting at least one dihydroxydiarylalkane in the form of its alkali metal salts with phosgene in the heterogeneous phase in the presence of sodium hydroxide solution and an organic solvent. The process is characterized in that the feedstock have but low content of Fe, Cr, Ni, Zn, Ca, Mg, Al metals or homologues thereof, and in that the organic solvent is separated off, and in that the polycarbonate which is obtained is worked up. The resulting polycarbonate is particularly useful in producing optical data carriers.

REFERENCES:
patent: 5412060 (1995-05-01), Wulff et al.
patent: 5783653 (1998-07-01), Okamoto
patent: 6183830 (2001-02-01), Okamoto et al.
patent: 6384185 (2002-05-01), Inada et al.
patent: 6646098 (2003-11-01), Dohi
patent: 0 380 002 (1990-08-01), None
patent: 0 264 885 (2000-01-01), None
patent: 7-196783 (1995-08-01), None

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