EP 0000361 B1 19840516 - PROCESS FOR THE PREPARATION OF POLY(PHENYLENE-OXY-PHENYLENE-SULFONE)
Title (en)
PROCESS FOR THE PREPARATION OF POLY(PHENYLENE-OXY-PHENYLENE-SULFONE)
Publication
Application
Priority
DE 2731816 A 19770714
Abstract (en)
[origin: US4200728A] Polyethers, preferably containing sulfone groups, are obtained by a multi-stage condensation process at from 100 DEG to 230 DEG C. from substantially equivalent amounts of bis-(4-hydroxyphenyl)-sulfone and a dichlorobenzene compound in a polar aprotic solvent in the presence of an anhydrous alkali metal carbonate, with or without the addition of a compound which forms an azeotrope.
IPC 1-7
IPC 8 full level
C08G 65/40 (2006.01); C08G 75/23 (2006.01)
CPC (source: EP US)
C08G 65/4093 (2013.01 - EP US); C08G 75/23 (2013.01 - EP US)
Citation (examination)
- DE 1545106 A1 19700716 - UNION CARBIDE CORP
- DE 1957091 A1 19700611 - CELANESE CORP
- CA 847963 A 19700728 - UNION CARBIDE CORP
- J. Pol. Sci. part A1, vol 5, 2375-2398 (1967)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0000361 A1 19790124; EP 0000361 B1 19840516; DE 2731816 A1 19790201; DE 2862403 D1 19840620; US 4200728 A 19800429
DOCDB simple family (application)
EP 78100283 A 19780630; DE 2731816 A 19770714; DE 2862403 T 19780630; US 91217678 A 19780605