B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
18/12, 400/8101,
B01D 61/00 (2006.01) B01D 71/00 (2006.01) C02F 1/44 (2006.01) C08J 5/22 (2006.01) C08J 9/28 (2006.01) C08L 81/06 (2006.01)
Patent
CA 1276359
\ Abstract Semi-Permeable Membrane Of Sulphonated Polyarylether Sulphones Solutions of sulphonated polyarylethersulphones in a solvent mixture of at least three liquids which are non-solvents or poor solvents for the polymer, can be used to produce asymmetric semi- permeable membranes. The polymer may be a copolymer of ? Ph1 - O - Ph2 - O - Pb1 - SO2 ? and ? Ph1 - O - Ph1 - SO2 - Ph1 - O - Ph2 - SO2 ? wherein Ph1 and Ph2 are respectively unsulphonated and sulphonated phenylene residues. The components of the solvent mixture have spe? bility parameters. Suitable solvent mixtures include ? ?oxane and acetonitrile and also methanol, chloroform and nitromethane.
468557
Hann Richard A.
Holmes David R.
Smith John W.
Barlow Charles Brian
Hann Richard A.
Holmes David R.
Imperial Chemical Industries Plc
Smith John W.
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