Claims
- 1. A solution for coating, comprising polyarylethersulfone containing units of the following formula: ##STR23## wherein n is independently an integer of 1 or 2 and wherein the ratio of unit (I) to unit (II) is greater than 1; wherein the units are attached to each other by an --O-- bond; said polymer produced by the reaction of at least one of hydroquinone or biphenol, with at least two of dichlorodiphenyl sulfone, dihydroxydiphenyl sulfone and chlorohydroxydiphenyl sulfone; said polymer dissolved in a solvent comprising methylene chloride.
- 2. A solution as defined in claim 1, wherein the polyarylethersulfone has repeating units of the formula: ##STR24##
- 3. A solution as defined in claim 2, wherein the polyarylethersulfone has repeating units of the formula: ##STR25##
- 4. A solid film prepared by coating the solution of claim 1.
- 5. An anisotropic membrane or hollow fiber prepared by coagulation of the solution of claim 4 into an aqueous medium.
Parent Case Info
This is a continuation of application Ser. No. 07/080,729 filed Aug. 3, 1987 which is a continuation of Ser. No. 536,843 filed Sept. 29, 1983 both now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3993843 |
Vasta |
Nov 1976 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
80729 |
Aug 1987 |
|
Parent |
536843 |
Sep 1983 |
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