MONOMOLECULAR FILM OR MONOMOLECULAR BUILT-UP FILM HAVING CROWN ETHER STRUCTURE

Japanese Patent JPH01242629

A

PURPOSE: To make it possible to impart functions such as an ability to selectively scavenge, separate or transfer ions or metals to a thin polyimide film to made it useful for a metal separation membrane, an ion-selective electrode, etc., by introducing a crown ether group into said thin polyimide film.

CONSTITUTION: A monomolecular film or a monomolecular built-up film is formed by using a polyimide having repeating units of formula I (wherein R1 is a tetravalent aromatic group, and R2 is a bivalent organic group having a crown ether structure) as a constituting component. This film is produced by casting a solution of a polyamic acid of formula II (wherein R1 and R2 are as defined above) and a long-chain alkylamine in an organic solvent on the surface of water, forming a monomolecular film or monomoleculer built-up film of the polyamic acid derivative on a base and imidating this film. The film is excellent in mechanical strengths, heat resistance, chemical resistance, etc.

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IMAI YOSHIO
KAKIMOTO MASAAKI
NISHIKATA YASUNARI
KOBAYASHI ICHIRO

JP7072088A

September 27, 1989

March 24, 1988

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MITSUBISHI CHEM IND
IMAI YOSHIO
KAKIMOTO MASAAKI

H01L21/368; C08G73/10; C08J5/18; C09K3/00; G02F1/35; G02F1/355; G02F1/361; (IPC1-7): C08G73/10; C08J5/18; C09K3/00; G02F1/35; H01L21/368

JPS60262608A	1985-12-26
JPS62290504A	1987-12-17
JPS58188142U	1983-12-14

Hasegawa Soji

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