PREPARATION OF COMPOSITE SEPARATION FILM

Title:

PREPARATION OF COMPOSITE SEPARATION FILM

Document Type and Number:

Japanese Patent JPS588514

Kind Code:

A

Abstract:

PURPOSE: To prepare a composite separation film having heat resistance and mechanical strength and excellent in gas permeation and gas separation capacities, by coating a dilute solution of an other heat resistant polymer is coated on an aromatic polyimide microporous film and the obtained coating film is dried.

CONSTITUTION: On a microporous film prepared from aromatic polyamic acid or aromatic polyimide obtained by polymerizing an aromatic tetracarboxylic acid component and an aromatic diamine, a polymer solution obtained by dissolving a heat resistant polymer such as poly (2;6-diphenylphenylene oxide), polysulfone or silicone rubber (polydimethylsiloxane) in an aromatic polyimide insoluble solvent such as benzene is coated and the formed coating film is dried while gradually heated. By this method, a composite film having high separation capacity of H2 from CO can be stably prepared in good reproducibility.

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Inventors:

MAKINO HIROSHI
KUSUKI YOSHIHIRO
HARADA TAKASHI
SHIMAZAKI HIROSHI
ISHIDA TOSHIO

Application Number:

JP10562081A

Publication Date:

January 18, 1983

Filing Date:

July 08, 1981

Export Citation:

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Assignee:

UBE INDUSTRIES

International Classes:

B01D71/44; B01D71/52; B01D53/22; B01D71/64; C08J9/34; (IPC1-7): B01D13/04; C08J9/36

Domestic Patent References:

JPS5386684A	1978-07-31
JPS4945152A	1974-04-30

Foreign References:

US4071590A	1978-01-31
US4240914A	1980-12-23
US3822202A	1974-07-02

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