C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
183/1, 402/9, 11
C08L 77/00 (2006.01) B01D 53/22 (2006.01) B01D 69/12 (2006.01) B01D 71/54 (2006.01) B01D 71/70 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08G 18/72 (2006.01) C08G 18/77 (2006.01)
Patent
CA 1199146
ABSTRACT An ultrathin film composed substantially of silicon-containing polyurea comprising polyaddition bonded units derived from (A) at least one polyamine selected from the group consisting of silicon-containing polyamines an hydrocarbon-type polyamines, each of said polyamines containing at least two primary or secondary amino groups in the molecule, and (B) at least one polyisocyanate compound select- ed from the group consisting of silicon-containing poly- isocyanates and hydrocarbon-type polyisocyanates, each of said polyisocyanates having at least two isocyanate groups in the molecular chains; provided that when the polyisocyanate compound is the hydrocarbon-type polyisocyanate alone, at least one of the selected polyamines is a silicon-containing polyamine containing at least one terminal amino group in the molecule. A composite structure composed of a microporous supporting film and the ultrathin film supported thereon is useful for the production of a gaseous mixture contain- ing a specified gas in a high concentration from a mixture of two or more gases including said specified gas, and is prepared by subjecting the polyamine and the polyisocyanate compound to interfacial polyaddition reaction on a micro- porous supporting film to form an ultrathin film composed substantially of a silicon-containing polyurea on the microporous supporting film.
427558
Hashimoto Eiichi
Mori Koh
Ueda Fumio
Yamada Takeyoshi
Smart & Biggar
Teijin Limited
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