Diepoxide crosslinked/esterified polyimide-aliphatic polyester c

Details Diepoxide crosslinked/esterified polyimide-aliphatic polyester c Diepoxide crosslinked/esterified polyimide-aliphatic polyester c

1995-11-21

1996-08-27

Sellers, Robert E.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

210651, C08G 5922, C08G 7310

Patent

active

055501990

ABSTRACT:
A new copolymer composition comprising the hard segment of a polyimide, the soft segment of an oligomeric aliphatic polyester, and a diepoxide for crosslinking and esterification. The new diepoxide polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture. These new membranes have shown much better stability in soaking with an aromatic/saturate feed than the copolymer membranes without a diepoxide.

REFERENCES:
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patent: 4880895 (1989-11-01), Higashi et al.
patent: 4944880 (1990-07-01), Ho et al.
patent: 5133989 (1992-07-01), Numata et al.
patent: 5230801 (1993-07-01), Darnell et al.
patent: 5241039 (1993-08-01), Ho et al.
patent: 5254795 (1993-10-01), Boucher et al.

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