Two phase interfacial polycondensation polycarbonate process

Details Two phase interfacial polycondensation polycarbonate process Two phase interfacial polycondensation polycarbonate process

1984-07-20

1985-12-10

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 80, 528198, 528199, C08G 6362

Patent

active

045581185

ABSTRACT:
This invention relates to an improved interfacial polycondensation aromatic polycarbonate process which does not require large quantities of strong base to provide a particulate product. The process is specific to interfacial polycondensation processes wherein the polycarbonate is formed in the aqueous phase by using a low organic to aqueous phase volume ratio. The quantity of strong base required to provide a particular product is reduced by adding the aromatic dihydroxy compound to the reaction mixture in small increments. This maintains a high mole ratio of strong base to aromatic dihydroxy compound during reaction.

REFERENCES:
patent: 4360659 (1982-11-01), Sikdar
patent: 4368315 (1983-01-01), Sikdar

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