Thin film composite membrane prepared by suspension deposition
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United States of America Patent
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Aug 29, 1989
Grant Date -
N/A
app pub date -
Oct 14, 1987
filing date -
Oct 14, 1987
priority date (Note) -
Expired
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Abstract
Thin film membranes of polyurea, polyureapolyurethane alloy, polyurea-polyurea/urethane alloy or polyurea/urethane are prepared by deposition of a thin film of suspension of the selected polymer on a thick permeable support layer by the technique of preparing a suspension of the selected polymer in a solvent which does not dissolve the thick permeable support layer and permitting the solvent to evaporate and/or permeate through the thick-permeable layer.
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