C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/24
C08J 9/28 (2006.01) C08J 3/09 (2006.01)
Patent
CA 1184715
ABSTRACT OF THE DISCLOSURE Unsubstituted sulfone polymer ultrafiltration membranes with remarkably high permeability to solvent at low pressure combined with excellent retention of low molecular weight macro- molecules and sharp molecular weight cutoff are prepared by casting a sheet of said polymer dissolved in hexamethyl phosphor- amide solvent, evaporating a portion of the solvent from the sheet and immersing said sheet in a gelation liquid therefore.
371795
Benzinger William D.
Hinde George M.
Toal Margaret G.
Atofina Chemicals Inc.
Borden Ladner Gervais Llp
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