Polyimide aliphatic polyester copolymers (C-2356)

Details Polyimide aliphatic polyester copolymers (C-2356) Polyimide aliphatic polyester copolymers (C-2356)

1990-05-04

1991-02-05

Sever, Frank

Compositions

Barrier layer device compositions

Group iii element containing binary compound; e.g., ga, as

21050039, B01D 6900

Patent

active

049902750

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.

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