1
Takeyuki Kawaguchi, Hiroyoshi Minematsu, Yuzuru Hayashi, Shigeyoshi Hara: Process for preparation of improved semipermeable composite membranes. June 14, 1983: US04388189 (91 worldwide citation)

In a process for producing a semipermeable composite membrane which comprises forming on a microporous substrate a thin layer of a polymeric material comprising a polyamino polymer containing at least 1 milliequivalent, per gram of the polymer in the dry state, of active amino groups selected from p ...


2
Takeyuki Kawaguchi, Yutaka Taketani, Noriaki Sasaki, Hiroyoshi Minematsu, Yuzuru Hayashi, Shigeyoshi Hara: Semipermeable composite membrane. Teijin, Wenderoth Lind & Ponack, November 24, 1981: US04302336 (87 worldwide citation)

A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, said polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole % of a recurring unit of the formula ##STR1## wherein ...


3
Shigeyoshi Hara, Yuzuru Hayashi, Takeyuki Kawaguchi, Noriaki Sasaki, Yutaka Taketani, Hiroyoshi Minematsu: Semipermeable composite membrane. Teijin, Sughrue Mion Zinn Macpeak & Seas, October 12, 1982: US04353802 (75 worldwide citation)

A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, the polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole % of a recurring unit of the formula ##STR1## wherein ...


4
Tadahiro Uemura, Yoshio Himeshima, Masaru Kurihara: Interfacially synthesized reverse osmosis membrane. Toray, Austin R Miller, August 2, 1988: US04761234 (62 worldwide citation)

A semipermeable composite membrane comprising a microporous substrate and an ultra-thin membrane with which the substrate is coated, characterized in that the ultra-thin membrane is composed of a cross-linked aromatic polyamide and the cross-linked aromatic polyamide contains a tri- or higher functi ...


5
Stanley F Rak, Kenneth Ward: Method for preparation of semipermeable composite membrane. Culligan International Company, George H Gerstman, August 19, 1986: US04606943 (49 worldwide citation)

An excellent reverse osmosis membrane having a high flux with superior chlorine resistance and low salt passage can be obtained by interfacially condensing a water soluble aromatic polyamide prepolymer with an essentially monomeric, aromatic, amine reactive polyfunctional acyl halide. The polyamide ...


6
jiang ji: Defect free composite membranes, method for producing said membranes and use of the same. Accord Partner, Bromberg & Sunstein, February 6, 2007: US07172075 (48 worldwide citation)

A defect free semipermeable composite membrane having outstanding integrity and high water permeability is provided. Said composite membrane comprises an inside support layer to provide sufficient mechanical strength, an outside barrier layer to provide selective separation and a middle layer to pro ...


7
Fusakazu Hayano, Yasuo Hashino, Kiyoshi Ichikawa: Semipermeable composite membranes. Asahi Kasei Kogyo Kabushiki Kaisha, Armstrong Nikaido & Marmelstein, December 6, 1977: US04061821 (40 worldwide citation)

A semipermeable composite membrane which shows only a small reduction of water permeability even when it is subjected to one time hot water treatment or drying treatment is provided according to the method of the present invention. Said semipermeable composite membrane consists of a porous substance ...


8
Masaru Kurihara, Tadahiro Uemura, Kiyoshi Okada: High performance semipermeable composite membrane and process for producing the same. Toray, Austin R Miller, June 7, 1983: US04387024 (39 worldwide citation)

A high performance semipermeable composite membrane containing a microporous substrate having a semipermeable membrane on the surface thereof. A composite ultrathin solute rejection barrier is formed on an intermediate transport layer which in turn is formed on a substrate.


9
Hirotsugu Yasuda: Semipermeable membrane. The United States of America represented by the Secretary of the Interior, William S Brown, Donald A Gardiner, June 28, 1977: US04032440 (25 worldwide citation)

A semipermeable composite membrane is prepared by glow discharge polymerization of a combination of an organic monomer and an inorganic monomer in the presence of a porous support, the polymerization resulting in deposition of a thin film of copolymer on the surface of the support.


10
Masaru Kurihara, Tetsuo Watanabe, Tetsuo Inoue: Reverse osmosis using a composite isocyanurate membrane. Toray, Austin R Miller, December 28, 1982: US04366062 (24 worldwide citation)

A method for the selective separation of at least one water-soluble useful material from an aqueous solution by reverse osmosis is provided. The method comprises contacting the aqueous solution under pressure maintained above the osmotic pressure of the aqueous solution with a semipermeable composit ...



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