EP 0000753 B1 19801210 - PROCESS FOR THE PREPARATION OF POLYCARBONATES AND THE POLYCARBONATES OBTAINED
Title (en)
PROCESS FOR THE PREPARATION OF POLYCARBONATES AND THE POLYCARBONATES OBTAINED
Publication
Application
Priority
DE 2735775 A 19770809
Abstract (en)
[origin: US4346210A] 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.
IPC 1-7
IPC 8 full level
C08G 63/00 (2006.01); C08G 59/00 (2006.01); C08G 64/04 (2006.01); C08G 64/22 (2006.01); C08G 64/24 (2006.01); C08L 63/00 (2006.01)
CPC (source: EP US)
C08G 64/24 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0000753 A1 19790221; EP 0000753 B1 19801210; BR 7805075 A 19790410; DE 2735775 A1 19790222; DE 2860295 D1 19810219; IT 1106867 B 19851118; IT 7850631 A0 19780807; JP S5430293 A 19790306; JP S6053049 B2 19851122; SU 1020006 A3 19830523; US 4346210 A 19820824
DOCDB simple family (application)
EP 78100539 A 19780728; BR 7805075 A 19780808; DE 2735775 A 19770809; DE 2860295 T 19780728; IT 5063178 A 19780807; JP 9589478 A 19780808; SU 2645703 A 19780808; US 8869479 A 19791026