Method for making polycarbonates

Details Method for making polycarbonates Method for making polycarbonates

1993-05-27

1994-06-07

Foelak, Morton

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528198, C08G 6400

Patent

active

053190661

ABSTRACT:
A method is provided for making aromatic polycarbonates by the melt condensation of a diaryl carbonate and an aromatic bis hydroxy compound in the presence of a condensation catalyst, such as hexahydro-2H-pyrimido[1,2-a]pyrimidine or an alkyl substituted derivative.

REFERENCES:
patent: 5026817 (1991-06-01), Sakashita et al.
patent: 5168112 (1992-12-01), Ueda et al.
Kinetics of Melt Transesterification of Diphenyl Carbonate and Bisphenol-A to Polycarbonate with LiOH H20 Catalyst, Yangsoo Kim et al., Ind. Eng. Chem. Res. 1992, 31, 2118-2127.

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