There is disclosed a composite membrane comprising [A]a polysulfone type porous membrane capable of rejecting 90% or more of dextran molecules having a weight average molecular weight of 70,000 and [B]a specific styrene type resin coated on at least one side of the polysulfone type porous membrane i
There is disclosed a composite membrane comprising [A]a polysulfone type porous membrane capable of rejecting 90% or more of dextran molecules having a weight average molecular weight of 70,000 and [B]a specific styrene type resin coated on at least one side of the polysulfone type porous membrane in a thickness of 5 m-7 g/cm2 of the polysulfone type porous membrane, the styrene type resin being selected from the group consisting of (I) a specific styrene type linear polymer having a weight average molecular weight of 1×10-5 or more, (II) a specific blend polymer prepared by blending at least two different styrene type linear polymers each as defined above and (III) a specific crosslinked polymer selected from the group consisting of (i) a crosslinked polymer prepared by crosslinking a styrene type linear polymer having a weight average molecular weight of 1×10-3 or more and (ii) a crosslinked polymer prepared by blending at least two different styrene type linear polymers each having a weight average molecular weight of 1×103. Such a composite membrane has been found to be advantageously employed for gas separation because of its high gas permeability and high selective gas permeability.
대표청구항▼
A composite membrane for use in the separation of a gas from a mixture of gases which comprises: a polysulfone type resin porous membrane capable of rejecting 90% or more of dextran molecules having a weight average molecular weight of 70,000; and a styrene type resin coated on at least one surface
A composite membrane for use in the separation of a gas from a mixture of gases which comprises: a polysulfone type resin porous membrane capable of rejecting 90% or more of dextran molecules having a weight average molecular weight of 70,000; and a styrene type resin coated on at least one surface of said polysulfone type resin porous membrane, said styrene type resin being a member selected from the group consisting of: (I) a linear polymer having a weight average molecular weight of 1×105 or more comprising 0 to 100 mol % of a structural unit (a), 0 to 100 mol % of structural unit (b) and 0 to 30 mol % of a structural unit (c), provided that the total amount of said structural units (a), (b) and (c) is 100 mol %, said structural unit (a) being represented by the formula [Figure] [I] wherein L1 is selected from the group consisting of a hydrogen atom, a halogen atom and a straight or branched, hydrocarbon radical having 1 to 10 carbon atoms, and L1′is selected from the group consisting of hydrogen atom, a halogen atom, and a straight or branched hydrocarbon radical having 1 to 6 carbon atoms, said structural unit (b) being represented by the formula [Figure] [II] wherein L2 is selected from the group consisting of a hydrogen atom, halogen atom and a straight or branched hydrocarbon radical having 1 to 8 carbon atoms, said structural unit (c) being represented by the formula [Figure] [III] wherein X is selected from the group consisting of a hydrogen atom, halogen atom, a methyl group and a cyano group, and Y is selected from the group consisting of (i) [Figure] wherein L3 is selected from the group consisting of a straight or branched hydrocarbon radical having 1 to 20 carbon atoms, (ii) a cyano group, (iii) a nitro group, (iv) a pyridyl group, (v) [Figure] wherein L4 is selected from the group consisting of a straight or branched hydrocarbon radical having 1 to 12 carbon atoms and (vi) [Figure] wherein L5 and L6 each independently are selected from the group consisting of a hydrogen atom, a straight or branched hydrocarbon radical having 1 to 12 carbon atoms, a phenyl group and a cyclohexyl group, (II) a blend polymer prepared by blending at least two different linear polymers (I) each as defined above, and (III) a crosslinked polymer selected from the group consisting of: (i) a crosslinked polymer prepared by crosslinking a linear polymer having a weight average molecular weight of 1×103 or more comprising 0 to 100 mol % of a structural unit (a) as defined above, 0 to 100 mol % of a structural unit (b) as defined above and 0 to 30 mol % of a structural unit (c) as defined above, provided that the total amount of said structural units (a), (b) and (c) is 100 mol %, and (ii) a crosslinked polymer prepared by crosslinking a blend polymer prepared by blending at least two different linear polymers each having a weight average moelcular weight of 1×103 or more, said linear polymers each comprising 0 to 100 mol % of a structural unit (a) as defined above, 0 to 100 mol % of a structural unit (b) as defined above and 0 to 30 mol % of a structural unit (c) as defined above, provided that the total amount of said structural units (a), (b) and (c) is 100 mol %, said styrene type resin having a selective gas permeability of not smaller than that of said polysulfone type resin porous membrane, said styrene type resin being coated on said polysulfone type resin porous membrane in a thickness of 5 m1.0×10-7 g/cm2 of said polysulfone type resin porous membrane.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Nohmi Takashi (Fuji JPX), Aromatic polysulfone type resin hollow fiber membrane and process for producing the same.
Brooks Albert A. (St. Louis MO) Henis Jay M. S. (Creve Coeur MO) Tripodi Mary K. (Creve Coeur MO), Methods for preparing anisotropic hollow fiber membranes comprising polymer of acrylonitrile and styrene and hollow fibe.
Ward Robert R. (Cary NC) Chang Richard C. (Raleigh NC) Danos James C. (Chapel Hill NC) Carden ; Jr. Joseph A. (Durham NC), Processes for coating bundles of hollow fiber membranes.
Yamada Takeyoshi (Iwakuni JPX) Kurisu Shizuka (Iwakuni JPX) Azuma Shizuo (Iwakuni JPX) Sugie Kiyoshi (Iwakuni JPX) Yamaji Teizo (Iwakuni JPX), Ultrathin solid membrane, process for production thereof, and use thereof for concentrating a specified gas in a gaseous.
Beck Henry N. (Walnut Creek CA) Mahoney Robert D. (Danville CA) Wan Hawk S. (Antioch CA) Lundgard Richard A. (Antioch CA), Anisotropic microporous syndiotactic polystyrene membranes and a process for preparing the same.
Beck Henry N. (Walnut Creek CA) Mahoney Robert D. (Danville CA) Wan Hawk S. (Antioch CA) Lundgard Richard A. (Antioch CA), Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.