JPS57182336A - Production of flexible porous sheet - Google Patents
Production of flexible porous sheetInfo
- Publication number
- JPS57182336A JPS57182336A JP6801181A JP6801181A JPS57182336A JP S57182336 A JPS57182336 A JP S57182336A JP 6801181 A JP6801181 A JP 6801181A JP 6801181 A JP6801181 A JP 6801181A JP S57182336 A JPS57182336 A JP S57182336A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- polyurethane
- substrate
- polymer
- treating
- 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
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
PURPOSE: To obtain a flexible sheet being excellent in air permeability, water resistance, etc., and having fine, uniform pores, by attaching a thickener solution prepared by adding a carboxyvinyl monomer to a polyurethane solution and further adding thereto an alkali, to a substrate, and treating the substancd with an acidic solution.
CONSTITUTION: To a solvent solution of a polyurethane-based polymer is added 0.1W7wt%, based on polyurethane, carboxyvinyl polymer which is soluble in the above solvent (e.g., N,N-dimethylformamide) and which shows a thickening effect with the aid of an alakline substance (e.g., a polymer prepared by copolymerizing allylbutanediol ether with acrylic acid at a weight ratio of 15:85). Then, the solution is thicknened by adding an alkaline substance (e.g., triethylamine). The title sheet is produced by coating or impregnating a substrate with the thickener solution or applying the solution to a releasable material and treating the substrate with an acid solution (e.g., aqueous phosphoric acid solution) which consists mainly of a liquid being a nonsolvent for the polyurethane and miscible with the above solvent and which is present in an amount sufficient to neutralize the thicknener solution.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6801181A JPS57182336A (en) | 1981-05-06 | 1981-05-06 | Production of flexible porous sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6801181A JPS57182336A (en) | 1981-05-06 | 1981-05-06 | Production of flexible porous sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57182336A true JPS57182336A (en) | 1982-11-10 |
Family
ID=13361471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6801181A Pending JPS57182336A (en) | 1981-05-06 | 1981-05-06 | Production of flexible porous sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57182336A (en) |
-
1981
- 1981-05-06 JP JP6801181A patent/JPS57182336A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54107949A (en) | Solution of fluorine-containing polymer bearing carboxyl group as side chain | |
JPS5349090A (en) | Preparation of fluorinated plymer containing ion exchange group | |
ES8704741A1 (en) | Controlled porosity osmotic pump. | |
JPS5569626A (en) | Porous high-molecular-weight composite with hydrophilic inner surface and its production | |
JPS5631405A (en) | Selective perameable membrane | |
JPS57182336A (en) | Production of flexible porous sheet | |
JPS57168921A (en) | Production of highly water-absorbing polymeric material having improved water-absorption rate | |
DK515783A (en) | MEMBRANE AND PROCEDURE FOR MANUFACTURING THIS | |
JPS5453533A (en) | Diffusion transfer photographic material having carboxylic acid polymer layer | |
JPS57122906A (en) | Selective permeable film | |
JPS57195132A (en) | Manufacturing of flexible porous sheet | |
JPS5249248A (en) | Reverse osmotic treatment of water-soluble electro-deposition coating | |
JPS57182335A (en) | Production of flexible porous sheet | |
JPS5534109A (en) | Polyethylene glycol composition | |
JPS551887A (en) | Preparing membrane by removing component from multiple component material | |
JPS55132605A (en) | Preparation of semi-permeable membrane | |
JPS54136570A (en) | Moisture permeable gas shelter | |
JPS56152705A (en) | Reinforced permeable membrane | |
JPS5691838A (en) | Water absorbing material | |
IE34377L (en) | Polymeric electrolytes | |
JPS5640415A (en) | Manufacture of extremely thin membrane | |
JPS56129007A (en) | Manufacture of composite semipermeable membrane | |
JPS5437185A (en) | Preparation of reactive aqueous emulsion | |
JPS5579011A (en) | Separation of oil emulsion | |
JPS5375297A (en) | Polymerization of 4,4'-thiobis (6-tertialbutyl-m-cresol) |