Preparation of a polycarbonate with electron donative amine comp

Details Preparation of a polycarbonate with electron donative amine comp Preparation of a polycarbonate with electron donative amine comp

1991-09-24

1992-09-22

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528202, 528204, C08G 6428, C08G 6430

Patent

active

051497700

ABSTRACT:
A polycarbonate is produced by melt-polycondensing a dihydric hydroxy compound and a bisarylcarbonate in the presence of a catalyst system comprising an electron donative amine compound and a compound selected from among alkali metal compounds and alkaline earth metal compounds. The process of the invention eliminates the use of poisonous phosgene, prevents chloride ions from being incorporated into the product polycarbonate and remains in the reaction system longer to enable the preparation of high-molecular weight polycarbonates.

REFERENCES:
patent: 5025083 (1991-06-01), Ueda et al.

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