Optical disc substrate made of a copolycarbonate

Details Optical disc substrate made of a copolycarbonate Optical disc substrate made of a copolycarbonate

1985-08-15

1987-07-14

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

428412, 524611, 528196, C08G 6362

Patent

active

046803742

ABSTRACT:
An optical disc substrate made of a polycarbonate containing from 5 to 100% by weight, based on the total carbonate bond-constituting units, of carbonate bond-constituting units having the formula: ##STR1## wherein each of Y and Z is a hydrogen atom or an aliphatic hydrocarbon group having from 1 to 6 carbon atoms, and each of X and W is an aliphatic hydrocarbon group having from 1 to 6 carbon atoms.

REFERENCES:
patent: 4304899 (1981-12-01), Mark et al.
patent: 4495345 (1985-01-01), Kawakami et al.
patent: 4529791 (1985-07-01), Glass

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