Method for the continuous preparation of carbonate oligomers wit

Details Method for the continuous preparation of carbonate oligomers wit Method for the continuous preparation of carbonate oligomers wit

1991-07-26

1993-05-11

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 64, 526 65, 528198, 528199, C08G 6420

Patent

active

052101720

ABSTRACT:
The invention relates to a method for the continuous preparation of carbonate oligomers by boundary face oligomerization of aromatic dihydroxy compounds with phosgene while adding base, in which the reaction is carried out in a loop-like reactor system in the absence of chain stopper and while using less than 200 ppm of catalyst related to the organic solvent using at least one static mixer and plug folw, optionally in combination with a stirred tank reactor.

REFERENCES:
patent: 4112112 (1978-10-01), Koda et al.
patent: 5037941 (1991-08-01), Weston et al.

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