W. S. Winston Ho - Annandale NJ
Guido Sartori - Annandale NJ
Warren A. Thaler - Flemington NJ
Bruce H. Ballinger - Bloomsbury NJ
David C. Dalrymple - Bloomsbury NJ
Robert P. Mastondrea - Hackettstown NJ
Exxon Research and Engineering Company - Florham Park NJ
A new copolymer composition comprising the soft segment of an aliphatic polyester and the hard segment of a highly halogenated polyurethane containing from 3 to 36 halogen atoms is disclosed. The new halogenated polyurethane copolymer membrane has high thermal stability, and good selectivity and permeability for separation of an aromatic/saturate mixture.