Back to results
US 4,265,745 AGranted
Permselective membrane
AssigneeTeijin Limited
InventorsTakeyuki Kawaguchi, Yutaka Taketani, Yuzuru Hayashi, Tomoyoshi Ono, Koh Mori
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeTeijin Limited
InventorsTakeyuki Kawaguchi, Yutaka Taketani, Yuzuru Hayashi, Tomoyoshi Ono, Koh Mori
Estimating the term…
A permselective membrane comprising a thin permselective film of a polymeric material, said polymeric material being prepared by cross-linking a polyaddition product between a polyepoxy compound and a polyamino compound having at least two amino groups capable of reacting with epoxy groups with a polyfunctional compound selected from the group consisting of aromatic, heterocyclic and alicyclic compounds containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate and acid anhydride groups; and a process for producing the same. The permselective membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.
A permselective membrane having high water flux and perselectivity comprising a thin permselective film of a polymeric material, said polymeric material being prepared by cross-linking a polyaddition product between a polyepoxy compound and a polyamino compound having at least two amino groups capable of reacting with epoxy groups with a polyfunctional compound selected from the group consisting of aromatic, heterocyclic and alicyclic compounds containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate and acid anhydride groups.
A process for producing a composite permselective membrane which comprises
Dependencies are inferred from the claim text.