JPS57182336A - Production of flexible porous sheet - Google Patents

Production of flexible porous sheet

Info

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
Application number
JP6801181A
Other languages
Japanese (ja)
Inventor
Shoichi Nagai
Akio Tanaka
Takeshi Kurushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP6801181A priority Critical patent/JPS57182336A/en
Publication of JPS57182336A publication Critical patent/JPS57182336A/en
Pending legal-status Critical Current

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
JP6801181A 1981-05-06 1981-05-06 Production of flexible porous sheet Pending JPS57182336A (en)

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)

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