초록 ▼

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 and hydrocarbon-type polyamines, each of said polyamines containing at least two pr

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 and 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 selected from the group consisting of silicon-containing polyisocyanates 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 containing 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 polyisocyante compound to interfacial polyaddition reaction on a microporous supporting film to form an ultrathin film composed substantially of a silicon-containing polyurea on the microporous supporting film.

대표청구항 ▼

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 having in the molecule at least two units of the following formula [Figure] (I) whe

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 having in the molecule at least two units of the following formula [Figure] (I) wherein R3 represents a monovalent hydrocarbon group or a fluorocarbon group, R1 and R2 are identical or different and represent a hydrogen atom or a monovalent hydrocarbon group which may have a primary or secondary amino group, or R1 and R2 may be bonded to each other to form an alkylene group interrupted by the nitrogen atom forming the secondary amino group, and n is an integer of 1 to 10, provided that R1 and R2 are not simultaneously aliphatic, alicyclic or aromatic groups free from the amino group, not all, but at least one, of the units of formula (I) forming a unit represented by the following formula [Figure] (I)-a wherein R1, R2, R3 and n are as defined, the free bond from the silicon atom is bonded directly to another carbon atom or another oxygen atom, and the free bond from the oxygen is bonded directly to another siloxane atom, and hydrocarbon-type polyamines containing at least two primary or secondary amino groups in the molecule, and (B) at least one polyisocyanate compound selected from the group consisting of silicon-containing polyisocyanates having at least 2 isocyanate groups in the molecular chains and hydrocarbon-type polyisocyanates having at least 2 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 in the molecule at least one unit of formula (I)-a in which the free bond from the silicon atom is bonded to a monovalent hydrocarbon group.