Manufacture of polycarbonates

Details Manufacture of polycarbonates Manufacture of polycarbonates

2006-06-26

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

C264S176100, C264S219000, C422S131000, C422S135000, C528S198000

Reexamination Certificate

active

07495064

ABSTRACT:
A method of producing a polycarbonate is provided. In an embodiment of the present invention the method includes the steps of: (i) introducing to a melt polymerization reactor system a reaction mixture having a first dihydroxy compound and an acid stabilizer, a carbonate source, and a polymerization catalyst system containing K2HPO4; and (ii) allowing the reaction mixture to polymerize thereby forming polycarbonate.

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