Process for the preparation of polycarbonates catalyzed by cycli

Details Process for the preparation of polycarbonates catalyzed by cycli Process for the preparation of polycarbonates catalyzed by cycli

1979-10-26

1982-08-24

Pertilla, Theodore E.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528171, C08L 6900

Patent

active

043462103

ABSTRACT:
The present invention relates to a process for the preparation of aromatic polycarbonates from diphenols by the phase boundary process, which is characterized in that cyclic, preferably monocyclic or bicyclic, aza compounds are used as catalysts. The present invention also relates to the polycarbonates obtainable according to the process, which are distinguished by high light transmission and a low tendency to yellowing, even after relatively severe exposure to heat.

REFERENCES:
patent: 3220975 (1965-11-01), Fox
patent: 3275601 (1966-09-01), Schnell et al.
patent: 3428600 (1969-02-01), Sullivan et al.
patent: 3787359 (1974-01-01), Horn et al.
patent: 3794629 (1974-02-01), Eimers et al.
patent: 3945969 (1976-03-01), Horn et al.
patent: 4025489 (1977-05-01), Bailey et al.
patent: 4038252 (1977-07-01), Vernaleken et al.
patent: 4073769 (1978-02-01), Eimers et al.
Chemisches Zentralblatt; Abstract No. 32-2837, 1965 (p. 10098) Oba et al.
Oba et al., Jap. A. S. 11447/1962, 8/1962, 1 page.

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