Poly(ethylene chlorotrifluoroethylene) membranes

Details Poly(ethylene chlorotrifluoroethylene) membranes Poly(ethylene chlorotrifluoroethylene) membranes

B - Operations, Transporting

01

D

B01D 71/32 (2006.01) B01D 69/08 (2006.01) B29C 67/20 (2006.01) C08J 5/18 (2006.01) C08J 9/00 (2006.01) C08L 27/12 (2006.01) D01D 5/24 (2006.01)

Patent

CA 2474625

Porous polymeric ultrafiltration or microfiltration membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The membranes may be in the form of a hollow fibre or flat sheet, and may include other agents to modify the properties of the membrane, such as the hydrophilic / hydrophobic balance. Leachable agents may also be incorporated into the membranes.

L'invention concerne des membranes d'ultrafiltration ou de microfiltration polym­res poreuses comprenant du Halar (poly(chlorotrifluoro~thyl­ne d'~thyl­ne)), des compos~s apparent~s ainsi que des proc~d~s de production de ceux-ci permettant d'~viter l'utilisation de solvants toxiques. Des solvants, agents de revÚtement et agents de formation de pores pr~f~r~s sont de l'ester d'~thyle d'acide citrique ou du triac~tate de glyc~rol. Ces membranes peuvent Útre sous forme d'une fibre creuse ou d'une feuille plate, et peuvent comprendre d'autres agents destin~s ~ modifier les propri~t~s de la membrane telles que l'~quilibre hydrophile/hydrophobe. Des agents lixiviables peuvent ~galement Útre incorpor~s ~ ces membranes.

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