Polyimide/aliphatic polyester copolymers

Details Polyimide/aliphatic polyester copolymers Polyimide/aliphatic polyester copolymers

1989-10-16

1990-07-31

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210651, 210654, 21050039, B01D 6136

Patent

active

049448803

ABSTRACT:
A new copolymer composition comprising the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high thermal stability for separation of an aromatic/saturate mixture. These new membranes have higher aromatic/saturate selectivity than polyurethanes.

REFERENCES:
patent: 4323453 (1982-04-01), Zapini
patent: 4323454 (1982-04-01), Fritzsche et al.
patent: 4575385 (1986-03-01), Brooks et al.
patent: 4800019 (1989-01-01), Bikson et al.
patent: 4822382 (1989-04-01), Nelson

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