Method of preparing polycarbonate resin

Details Method of preparing polycarbonate resin Method of preparing polycarbonate resin

2006-03-06

2009-02-24

Boykin, Terressa M (Department: 1796)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S196000, C528S199000

Reexamination Certificate

active

07495065

ABSTRACT:
A method of preparing a polycarbonate resin having improved thermal stability is provided. The method includes: mixing polycarbonate having hydroxy terminal groups and a end terminator, a compound of formula (1) (refer to the detailed description section) at normal temperature and pressure to obtain a mixture; and performing a melt reaction on the mixture at 250-320° C. and reduced pressure to highly reduce the final concentration of the hydroxy terminal groups of the polycarbonate resin.

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Korean Intellectual Property Office, PCT International Search Report, Date of Mailing: Jun. 20, 2006.

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