Polycarbonate resin for optical disk substrate and optical...

Details Polycarbonate resin for optical disk substrate and optical... Polycarbonate resin for optical disk substrate and optical...

2006-06-27

2006-06-27

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C359S642000, C428S064700, C524S147000, C524S310000, C524S313000, C524S317000, C528S198000

Reexamination Certificate

active

07067609

ABSTRACT:
The present invention relates to a polycarbonate resin that has a viscosity average molecular weight of from 10,000 to 17,000 and has characteristic features in an iron content, a free total phenol content, a content of a releasing agent, a fraction of hydroxyl end groups, a1H-NMR spectrum or the like. The polycarbonate resin has less defects due to flash without increase of an addition amount of a releasing agent to an unnecessary level and therefore is suitable for a material of an optical disk substrate.

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