Title:
【発明の名称】ポリアクリロニトリル系半透膜及びその製造法
Document Type and Number:
Japanese Patent JP2510540
Kind Code:
B2
Abstract:
PURPOSE:To obtain an ultrafiltration membrane which is excellent in pollution resistance and permselectivity and available for industry and medical care by constituting the semipermeable membrane of both a copolymer having a polyethylene oxide unit and a polyacrylonitrile-base polymer having ultrahigh degree of polymerization. CONSTITUTION:A copolymer is obtained by dissolving a monomer incorporating both a polyethylene oxide unit having a degree of polymerization not less than 5, and polymerizable double bond C=C in the same molecule, for example, methoxypolyethylene glycol monomethacrylate and acrylonitrile in a solvent, and adding a radical initiator thereto, polymerizing and purifying them. A raw liquid for manufacturing a membrane is obtained by dissolving this copolymer and an acrylonitrile-base polymer having limiting viscosity of not less than 2.0 and ultrahigh mol.wt. in a solvent and adding a antigelling agent thereto. By using a hollow mouthpiece, the raw liquid is discharged while introducing gaseous N2 to the inside of the hollow mouthpiece, and it is immersed in a coagulating bath such as water, and a polyacrylonitrile-base semipermeable membrane is obtained by slowly heat-treating it with a glycerin aq. soln.
More Like This:
Inventors:
TANAKA KAZUSANE
SHIMAMURA SEIJI
NAGAOKA SHOJI
SHIMAMURA SEIJI
NAGAOKA SHOJI
Application Number:
JP27386886A
Publication Date:
June 26, 1996
Filing Date:
November 19, 1986
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08J5/02; B01D71/42; B01D71/52; C08J5/18; D01D5/24; D01F6/18; D01F6/54; (IPC1-7): B01D71/42; B01D71/52; C08J5/02; C08J5/18
Domestic Patent References:
| JP569424A | ||||
| JP5590616A | ||||
| JP6022901A | ||||
| JP61176359A |