Digital video substrate

Details Digital video substrate Digital video substrate

1997-03-06

1998-07-21

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

428 64, 428412, 524611, 528202, 528204, 528372, C08G 6400

Patent

active

057836531

ABSTRACT:
A digital video disc substrate comprising a polycarbonate is herein disclosed in which a main chain has a structure represented by the general formula (I) ##STR1## and at least 25 mol % of this terminal group is represented by the formula (III) or (IV) ##STR2## and a viscosity-average molecular weight is in the range of 10,000 to 17,000, preferably 12,500 to 14,500.

REFERENCES:
patent: 4680374 (1987-07-01), Hasuo et al.
patent: 4734488 (1988-03-01), Hasuo et al.
patent: 4997903 (1991-03-01), Okamoto

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