Production of supported thin film membranes

Details Production of supported thin film membranes Production of supported thin film membranes

B - Operations, Transporting

01

D

B01D 71/54 (2006.01) B01D 67/00 (2006.01) B01D 69/10 (2006.01)

Patent

CA 2045109

ABSTRACT OF THE DISCLOSURE Supported thin film membranes of polyure- thane, polyurea/urethane, polyurea/polyurethane alloy blends are prepared by depositing a solution of the appropriate polymer on a microporous hydrophobic support. The solution wets but does not soak through the hydrophobic support because the amounts and ratios of solvents and surfactant used to produce the solution have been adjusted to produce a solution having optimum coating properties (for example, surface tension, solvency, viscosity). The polymer solution is option- ally aged at least 1 day prior to being coated on the microporous support.

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