C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/16
C08J 9/34 (2006.01) B01D 69/02 (2006.01) B01D 71/48 (2006.01) B01D 71/50 (2006.01) B01D 71/64 (2006.01)
Patent
CA 1168006
ABSTRACT OF THE DISCLOSURE There is disclosed an integral polymeric asymmetric ultra- filtration membrane and a process for preparing that membrane. The membrane comprises a skin and a support. The support comprises an open honeycomb structure. The polymer used to prepare the membrane may be any membrane forming polymer which has a glass transition temperature of at least about 200°C. The process for preparing these ultrafiltration membranes comprises casting a solution comprising a solvent and less than about 13% by weight of the polymer into a quench liquid so that the polymer is sub- stantially immediately precipitated as a solid membrane. The quench liquid should be a non-solvent for the polymer but be mis- cible with the solvent. The membranes produced by this process have a water permeability of at least about 0.2 cm/min psi.
374765
Brunswick Corporation
Meredith & Finlayson
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