JPS57141432A - Hydrophilic polyolefin resin porous membrane and its production - Google Patents
Hydrophilic polyolefin resin porous membrane and its productionInfo
- Publication number
- JPS57141432A JPS57141432A JP2692781A JP2692781A JPS57141432A JP S57141432 A JPS57141432 A JP S57141432A JP 2692781 A JP2692781 A JP 2692781A JP 2692781 A JP2692781 A JP 2692781A JP S57141432 A JPS57141432 A JP S57141432A
- Authority
- JP
- Japan
- Prior art keywords
- polyolefin resin
- porous membrane
- inorganic fine
- fine powder
- sulfonated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
PURPOSE: To produce the titled polymer excellent in water permeability, uptake efficiency, retention of permeating water and chemical resistance, by sulfonating a porous membrane comprising an inorganic fine powder and a polyolefin resin with anhydrous sulfuric acid and then extracting the inorganic fine powder.
CONSTITUTION: A porous membrane comprising a polyolefin resin and an inorganic fine powder, average particle size 0.005W0.5μ, specific surface area 50W 500m2/g (e.g., fine silicic acid powder) is submerged in anhydrous sulfuric acid containing 1W30wt% free SO3, sulfonated at 60°C or below for 1minW3hr, washed with water, and submerged in an aqueous alkali (e.g., NaOH) solution to extract the inorganic fine powder at a temperature at least 10°C below the m.p. of the polyolefin resin. In this way, there is obtained a porous membrane whose pore surfaces and extermal surfaces are sulfonated, which contains 0.05W1meq/g (exchange eq) sulfonic groups and which has a porosity of 30W85% and an average pore diameter of 0.05W1μ.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2692781A JPS57141432A (en) | 1981-02-27 | 1981-02-27 | Hydrophilic polyolefin resin porous membrane and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2692781A JPS57141432A (en) | 1981-02-27 | 1981-02-27 | Hydrophilic polyolefin resin porous membrane and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57141432A true JPS57141432A (en) | 1982-09-01 |
Family
ID=12206801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2692781A Pending JPS57141432A (en) | 1981-02-27 | 1981-02-27 | Hydrophilic polyolefin resin porous membrane and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57141432A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014984A (en) * | 1983-07-07 | 1985-01-25 | Asahi Chem Ind Co Ltd | Method for removing ion and fine particle |
| JPS62179540A (en) * | 1986-02-04 | 1987-08-06 | Asahi Chem Ind Co Ltd | Nonadsorptive hydrophilic membrane |
| JPH01131492U (en) * | 1988-03-03 | 1989-09-06 |
-
1981
- 1981-02-27 JP JP2692781A patent/JPS57141432A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014984A (en) * | 1983-07-07 | 1985-01-25 | Asahi Chem Ind Co Ltd | Method for removing ion and fine particle |
| JPH0462795B2 (en) * | 1983-07-07 | 1992-10-07 | Asahi Chemical Ind | |
| JPS62179540A (en) * | 1986-02-04 | 1987-08-06 | Asahi Chem Ind Co Ltd | Nonadsorptive hydrophilic membrane |
| JPH01131492U (en) * | 1988-03-03 | 1989-09-06 |
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