Aromatic polycarbonate copolymer, a process for producing the sa

Details Aromatic polycarbonate copolymer, a process for producing the sa Aromatic polycarbonate copolymer, a process for producing the sa

1995-01-17

1996-09-17

Buttner, David

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524302, 524323, 528202, 528204, C08G 6410

Patent

active

055569048

ABSTRACT:
There is provided an aromatic polycarbonate copolymer obtained by reacting a dihydric phenol component comprising mainly 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane and 9,9-bis(4-hydroxyphenyl)fluorene or 1,1-bis(4-hydroxyphenyl)-1-phenylethane in a prescribed ratio with a carbonate precursor substance. This aromatic polycarbonate copolymer has a specific viscosity in a limited range. The aromatic polycarbonate copolymer is excellent in optical characteristics, transparency, hydrolysis resistance, heat resistance, oxidation resistance, and heat stability and good in moldability, and is suitable for a plastic optical waveguide that is small in transmission loss and excellent in heat resistance.

REFERENCES:
patent: 3546165 (1970-12-01), Morgan
patent: 4346211 (1982-08-01), Krishnan
Database WPI, Week 9115, Derwent Publications Ltd., London, GB; AN 91-105060.
Morgan, Macromolecules, pp. 536-544 (1970).

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