Claims
- 1. A highly permeable membrane containing a dense selective "skin" and a porous support suitable for solvent separation in a pervaporative cell, said membrane having enhanced permeability while retaining its selectivity, comprising an inherently entangled polymer alloy composition of between 20 and 60 percent of a first phosphorus and halogen-containing polymer component having the formula: ##STR3## wherein m and n are zero or any integer and m' and n' are integers,
- p is an integer higher than 10,
- X is hydrogen, halogen or a phosphorus-containing group,
- Y is CH.sub.2 CHCl or CH.sub.2 CCl.sub.2, and
- Z and Z' are hydrogen or a phosphonate group (at least one being a phosphonate group);
- and from 40 to 80 percent of a second polymer component containing ester groups and/or a polystyrene polymer.
- 2. The membrane of claim 1, wherein the first polymer component has the formula (I), wherein X = bromine, n = n' = 1, and Z' = PO(OMe).sub.2 and Z = H or PO(OMe).sub.2.
- 3. The membrane of claim 1, wherein the first polymer component has the formula (I) wherein X = bromine, n' = n = 1, Z = H and Z' = PO(OMe).sub.2, or PO(OEt).sub.2.
- 4. The membrane of claim 1, wherein the first polymer component has the formula (I) wherein X = H, n = n' = 1, Z = PO(OMe).sub.2 and Z' = H or PO(OMe).sub.2.
- 5. The membrane of claim 1, wherein the first polymer component has the formula (II) wherein Y = CH.sub.2 CCl.sub.2, n = o, n' = 2, Z = H and Z' = PO(OMe).sub.2.
- 6. The membrane of claim 1, wherein the first polymer component has the formula (II) wherein m = o, n = o, n' = 2, Z = H and Z' = PO(OMe).sub.2.
- 7. The membrane of claim 1, wherein the second polymer component is acetyl cellulose.
- 8. The membrane of claim 1, wherein the second polymer component is an unsaturated polyester resin.
- 9. The membrane of claim 1, wherein the second polymer component is a polystyrene.
Priority Claims (1)
Number |
Date |
Country |
Kind |
39426 |
May 1972 |
IL |
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Parent Case Info
This is a continuation, of application Ser. No. 358,061, filed May 7, 1973 now abandoned.
US Referenced Citations (8)
Continuations (1)
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Number |
Date |
Country |
Parent |
358061 |
May 1973 |
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