JPS5630441A - Production of microporous membrane - Google Patents
Production of microporous membraneInfo
- Publication number
- JPS5630441A JPS5630441A JP10745579A JP10745579A JPS5630441A JP S5630441 A JPS5630441 A JP S5630441A JP 10745579 A JP10745579 A JP 10745579A JP 10745579 A JP10745579 A JP 10745579A JP S5630441 A JPS5630441 A JP S5630441A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- polymer
- solvent
- forming
- islands
- 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.)
- Granted
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
PURPOSE: To obtain a porous membrane having uniform pores and excellent mechanical properties, by forming a membrane from a mixture prepared by mixing two polymers incompatible with each other in the presence of a specific dispersant, and then selectively extracting one polymer from the membrane with a specific solvent.
CONSTITUTION: A sea-island type dope in which islands of (B) herein-blow described are dispersed in the matrix of polymer (A) herein-below described is prepared by mixing (I) polymers (A) and (B) incompatible with each other in the presence of 0.05W20wt%, based on component (I), of a dispersant comprising a block copolymer in which at least one block component has affinity for polymer (A) and at least one different block component has affinity for polymer (B) and, optionally, in the presence of (II) a solvent. Then, titled membrane is obtained by forming the dops into a membrane, for example, by a conventional inflation method, and then, extracting islands of (B) with a solvent which selectively dissolves polymer (B).
EFFECT: Stability in membrane-forming process is good, and easy control of porosity is possible.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10745579A JPS5630441A (en) | 1979-08-22 | 1979-08-22 | Production of microporous membrane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10745579A JPS5630441A (en) | 1979-08-22 | 1979-08-22 | Production of microporous membrane |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5630441A true JPS5630441A (en) | 1981-03-27 |
JPS6139978B2 JPS6139978B2 (en) | 1986-09-06 |
Family
ID=14459594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10745579A Granted JPS5630441A (en) | 1979-08-22 | 1979-08-22 | Production of microporous membrane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5630441A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0510156A (en) * | 1991-06-28 | 1993-01-19 | Kubota Corp | Overrun preventer of positive crankcase ventilation type diesel engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS539632A (en) * | 1976-07-14 | 1978-01-28 | Sugiyama Kk | Paper napkin manufacturing device |
-
1979
- 1979-08-22 JP JP10745579A patent/JPS5630441A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS539632A (en) * | 1976-07-14 | 1978-01-28 | Sugiyama Kk | Paper napkin manufacturing device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0510156A (en) * | 1991-06-28 | 1993-01-19 | Kubota Corp | Overrun preventer of positive crankcase ventilation type diesel engine |
Also Published As
Publication number | Publication date |
---|---|
JPS6139978B2 (en) | 1986-09-06 |
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