C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
400/8101, 182/15
C08J 3/11 (2006.01) B01D 61/00 (2006.01) B01D 67/00 (2006.01) B01D 71/68 (2006.01) C08J 3/09 (2006.01) C08L 81/06 (2006.01)
Patent
CA 1276360
Abstract A polymer solution contains a sulphonated polyarylenthersulphone in a solvent mixture containing at least three components, where the solvent mixture has a delta-H in the range from 3 to 8.5; a delta-P in the range from 4 to 8 and a delta-D in the range 7.2 to 9.5 and each component of the solvent mixture is a liquid or low melting solid which is a non-solvent or poor solvent for the sulphonated polyarylenthersulphone, and at least one of the components satisfies at least one of the conditions:- a) said component has a delta-D of less than 8 when the value of delta-P is not more than 3; and b) said component has a delta-H of greater than 3 when the value of delta-P is at least 8.5; and c) said component has a delta-H of less than 8 when it contains at least one hydroxylic group; and d) said component is free of hydroxylic groups and has a delta-P which is greater than 3 and less than 8.5. The solution can be used for the production of membranes suitable for use in reverse osmosis applications.
509815
Cardew Peter T.
Holmes David R.
Smith John W.
Barlow Charles Brian
Cardew Peter T.
Holmes David R.
Imperial Chemical Industries Plc
Smith John W.
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