Process for producing polycarbonate oligomer and process for...

Details Process for producing polycarbonate oligomer and process for... Process for producing polycarbonate oligomer and process for...

2007-01-02

2007-01-02

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C264S176100, C264S219000, C422S131000, C528S198000

Reexamination Certificate

active

10481054

ABSTRACT:
A process for producing an aromatic polycarbonate oligomer according to an interfacial polymerization method comprising reacting an aqueous solution of a bisphenol compound and phosgene in the presence of an organic solvent in a reactor, removing reaction heat by cooling, utilizing vaporization latent heat of the organic solvent to be used, cooling vaporized organic solvent through a condenser and returning an exhaust gas from the condenser to the reactor and a process for producing an aromatic polycarbonate resin used the same.

REFERENCES:
patent: 3646102 (1972-02-01), Kobayashi et al.
patent: 4153780 (1979-05-01), Narita et al.
patent: 46-21460 (1971-06-01), None
patent: 54-40280 (1979-12-01), None
patent: 55-52321 (1980-04-01), None
patent: 58-108225 (1983-06-01), None
patent: 8-217871 (1996-08-01), None

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