Process for the preparation of a polycarbonate with piperidinyl

Details Process for the preparation of a polycarbonate with piperidinyl Process for the preparation of a polycarbonate with piperidinyl

1991-01-08

1992-12-01

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528198, 528204, C08G 6420

Patent

active

051681129

ABSTRACT:
A polycarbonate is produced by melt-polycondensing a dihydric hydroxy compound and a bisarylcarbonate in the presence of 4-(4-methyl-1-piperidinyl)-pyridine, or a salt thereof, as a catalyst. 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.
Patent Abstracts of Japan, vol. 12, No. 482 (C-553)[3329], Dec. 15, 1988.

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