Class / Patent application number | Description | Number of patent applications / Date published |
210500370 | Amine | 36 |
20100133172 | Fouling resistant coating for membrane surfaces - A coating that exhibits resistance to fouling by waterborne contaminants, and permselective membranes having this type of coating, are disclosed. For example, a reverse osmosis membrane is coated with a hydrogel-like composition comprising a combination of a hydrophilic polymer, a polyphenolic compound, and a surfactant, whereby the membrane is made more resistant to fouling by organic contaminants. Particularly beneficial are coating compositions containing amine-based surfactants, these being retained in the hydrophilic coating by polar or ionic binding forces. | 06-03-2010 |
20110073541 | CRYSTALLINE POLYMER MICROPOROUS MEMBRANE, METHOD FOR PRODUCING THE SAME, AND FILTRATION FILTER - To provide a crystalline polymer microporous membrane, which contains a crystalline polymer microporous film containing a crystalline polymer; and a fluorosurfactant covering at least part of the exposed surface of the crystalline polymer microporous film, wherein the crystalline polymer microporous membrane has a plurality of pores, where the average pore diameter of a first surface of the crystalline polymer microporous membrane is larger than that of a second surface thereof, and the average pore diameter of the crystalline polymer microporous membrane continuously changes from the first surface thereof to the second surface thereof. | 03-31-2011 |
20120145626 | DEVICE FOR RENAL CELL EXPANSION - A device for culturing, storing and expanding adherent renal cells. The device permits the adhesion and proliferation of the cells and the surface characteristics of the membrane material used in said device further permit the cellular matrix components (EMC). A method for expanding adherent renal cells and methods of using particular membranes for culturing, storing and expanding adherent renal cells. The membranes comprise a copolymer of acrylonitrile and sodium methallyl sulfonate as well as polyethylenimine. | 06-14-2012 |
20140061122 | Filter For Water Treatment Filtering and Method For Producing The Same - The problem to be solved by the present invention is to provide a filter medium for a water treatment filter having contradictory characteristics, that is, hydrophilicity and chemical resistance, and a long life, and to provide the production method thereof. A filter medium for a water treatment filter according to the present invention is characterized in comprising a porous base material having a hydrophilic coating layer; wherein the hydrophilic coating layer has a cross-linked hydrophilic polymer and a high electron density part; a hydrophilic polymer in the cross-linked hydrophilic polymer is cross-linked with an aliphatic saturated hydrocarbon group which may contain one or more functional groups selected from a group consisting of an ether group, a hydroxy group and an amino group; the high electron density part has π electrons; and the high electron density part is covalently bonded to the cross-linked hydrophilic polymer. | 03-06-2014 |
20140360932 | POLYMERIC MATRICES FORMED FROM MONOMERS COMPRISING A PROTECTED AMINE GROUP - The present disclosure relates to polymeric matrices composed of protected amine compound residues and membranes composed from such polymeric matrices. In particular, the present disclosure relates to a polymeric matrix comprising amine compound residues, acyl compound residues and protected amine compound residues. | 12-11-2014 |
20160136586 | MEMBRANE AND METHOD OF MANUFACTURING THE SAME - Provided are a functional membrane and a method of manufacturing the same, in which the functional membrane has a structure that is formed by accumulating nanofibers that are formed by electrospinning a spinning solution that is produced by mixing a dopamine monomer or polymer, a solvent and a polymer material. | 05-19-2016 |
210500380 | Amide | 30 |
20080197071 | Nano Composite Hollow Fiber Membrane and Method of Manufacturing the Same - Disclosed are a nanofiltration composite hollow fiber membrane and a method of manufacturing the same. The nanofiltration composite hollow fiber membrane includes a reinforcement ( | 08-21-2008 |
20080203013 | OXIDATION-RESISTANT COMPOSITE REVERSE OSMOSIS MEMBRANE - Disclosed is a oxidation resistant composite reverse osmosis membrane, comprising a porous support and a polyamide layer, in which the polyamide layer is modified by an agent so that the membrane retains a salt rejection of at least 85% after being subjected to an aqueous solution of NaClO having a concentration of about 2,000 to 30,000 ppm for about one hour. A process of preparing the membrane is also disclosed. | 08-28-2008 |
20080237118 | Polyamide Reverse Osmosis Composite Membrane and Preparation Method Thereof - An amine aqueous solution for forming an active layer of a polyamide reverse osmosis composite membrane is prepared, which consists of 0.1 through 20 weight % of polyfunctional aromatic amine monomer, 0.1 through 20 weight % of multi-functional tertiary alcohol amine, 0.1 through 20 weight % of strong acid, and 40 through 99.7 weight % of water. | 10-02-2008 |
20080251447 | PROCESS FOR PRODUCING A DRIED COMPOSITE SEMIPERMEABLE MEMBRANE - The present invention aims at providing a process for producing a dried composite semipermeable membrane having extremely small amount of content of unreacted components, outstanding water permeability and salt-blocking rate even after drying treatment, and outstanding contamination resistance and durability. The present invention relates to a process for producing a dried composite semipermeable membrane comprising the steps of: preparing a composite semipermeable membrane having a skin layer including a polyamide resin obtained by reaction between a polyfunctional amine component and a polyfunctional acid halide component formed on the surface of a porous support; preparing a washed composite semipermeable membrane by washing the composite semipermeable membrane; preparing a treated composite semipermeable membrane by contact of a moisturing solution including a moisturizer and a hydrophilization agent only to the surface of the porous support of the washed composite semipermeable membrane and by contact of a protecting solution only to the surface of the skin layer of the washed composite semipermeable membrane; and drying the treated composite semipermeable membrane. | 10-16-2008 |
20080277334 | Process for Producing Semipermeable Composite Membrane - The present invention aims at providing a composite semipermeable membrane excellent in water permeability and salt-blocking rate, a smaller content of unreacted polyfunctional amine components in the membrane, the composite semipermeable membrane avoiding the necessity of a membrane washing treatment, and the present invention also aims at providing a process for producing the composite semipermeable membrane. A composite semipermeable membrane having a skin layer, formed on a surface of a porous support, including a polyamide resin obtained by an interfacial polymerization of a polyfunctional amine component and a polyfunctional acid halide component, wherein the content of the unreacted polyfunctional amine component is 200 mg/m | 11-13-2008 |
20090159527 | MODIFIED MEMBRANE - A multilayered modified membrane and method for making the same, comprising a modified discriminating layer that can have a fouling resistant surface, improved salt rejection, antimicrobial properties, and/or improved solute, and/or small organics rejection as compared to membranes with unmodified discriminating layers. | 06-25-2009 |
20100176052 | PROCESS FOR PRODUCING COMPOSITE SEMIPERMEABLE MEMBRANE - The present invention aims at providing a process for producing composite semipermeable membrane excellent in water permeability and salt-blocking rate, and including an extremely small amount of unreacted components in the membrane, and at providing a composite semipermeable membrane obtained by the production process. The present invention relates to a process for producing a composite semipermeable membrane, comprising the steps of: producing an unwashed composite semipermeable membrane by forming a skin layer including a polyamide resin obtained by reaction between a polyfunctional amine component and a polyfunctional acid halide component on the surface of a porous support; and pretreating the unwashed composite semipermeable membrane by contact to a solution containing a water-soluble alcohol, and subsequently performing a membrane washing treatment by contact to pure water or ion exchange water. | 07-15-2010 |
20100181250 | AMINE AQUEOUS SOLUTION FOR FORMING AN ACTIVE LAYER OF POLYAMIDE REVERSE OSMOSIS COMPOSITE MEMBRANE, POLYAMIDE REVERSE OSMOSIS COMPOSITE MEMBRANE PREPARED THEREBY, AND PREPARATION METHOD THEREOF - Disclosed are an amine aqueous solution for forming an active layer of a polyamide reverse osmosis composite membrane and a preparation method of the polyamide reverse osmosis composite membrane using the same. The amine aqueous solution comprises 0.1 to 20 wt % of a polyfunctional amine compound, 0.1 to 20 wt % of an alcohol amine compound, 0.1 to 20 wt % of a tertiary amine compound, and 40 to 99.7 wt % of water. Due to using an amine aqueous solution having an alcohol amine and a tertiary amine compound, the polyamide reverse osmosis composite membrane has high water permeability and enhanced salt rejection rate, and thus is useful for the membrane field. | 07-22-2010 |
20100320143 | COMPOSITE SEMIPERMEABLE MEMBRANES AND PROCESS FOR PRODUCTION THEREOF - It is an object of the present invention to provide a process for producing, easily and at a low cost, a composite semipermeable membrane having excellent contamination resistance, especially microbial contamination resistance, and a composite semipermeable membrane produced by the process. The process for producing a composite semipermeable membrane of the present invention comprises forming a skin layer including a polyamide resin obtained by a reaction between a polyfunctional amine component and a polyfunctional acid halide component on the surface of a porous support; forming a polymer layer (A) including a silver salt compound on the skin layer directly or through other layers; and reducing the silver salt compound to precipitate metal silver in the polymer layer (A) and/or on the surface thereof. | 12-23-2010 |
20110120942 | MODIFIED POLYAMIDE MEMBRANE - A modified polyamide membrane and method for making and using the same. The present invention includes many embodiments including methods comprising contacting a polyamide membrane with certain modifiers, including but not limited to certain oxazoline and/or thiazoline-based compounds, derivatives and polymers thereof. In one embodiment, the surface of a polyamide membrane is coated with a solution including a polyoxazoline and optionally a polyalkylene oxide material, followed by optional heating. Preferred embodiments may exhibit improved performance, e.g. increased rejection of certain species, (e.g. sodium chloride and/or boric oxides such as boric acid or various borate salts), reduced fouling, improved antimicrobial properties, and/or improved storage stability. | 05-26-2011 |
20110192788 | METHOD FOR PRODUCING POROUS THERMOSETTING RESIN SHEET, POROUS THERMOSETTING RESIN SHEET AND COMPOSITE SEMIPERMEABLE MEMBRANE USING SAME - Disclosed is a method for easily producing a long porous thermosetting resin sheet which has no resin coating film on the surface. Also disclosed are a porous thermosetting resin sheet produced by the method, and a composite semipermeable membrane having excellent chemical resistance and practical water permeability and salt-blocking property. The porous thermosetting resin sheet can be produced by forming a cylindrical or columnar resin block which is composed of a cured product of a thermosetting resin composition containing a thermosetting resin, a curing agent and a porogen; then forming a long thermosetting resin sheet by cutting the surface of the resin block at a certain thickness; and then removing the porogen from the thermosetting resin sheet. | 08-11-2011 |
20110203990 | CHLORINE RESISTANT POLYAMIDES AND MEMBRANES MADE FROM THE SAME - A chlorine resistant polyamide is formed from the reaction product of an amine and an acid chloride monomer wherein the acid chloride monomer is modified with electron-withdrawing groups that exhibit sufficient activity to (i) minimize any chlorination on both the amine and acid chloride side and (ii) minimize N-chlorination. A membrane is made from the polyamide and, in one application, the membrane is used in a desalination unit. | 08-25-2011 |
20110284458 | COMPOSITE MEMBRANE WITH COATING COMPRISING POLYALKYLENE OXIDE AND BIGUANIDE-TYPE COMPOUNDS - Composite membranes including a coating of polyalkylene oxide and biguanide compounds along with various methods for making and using the same. In one embodiment, the composite membrane comprises a thin film polyamide layer including a coating of a reaction product of a polyalkylene oxide compound and a biguanide-type compound. In another embodiment, the coating comprises a polymer including alkylene oxide repeating units and one or more biguanide functional groups. | 11-24-2011 |
20120241373 | COMPOSITE MEMBRANES AND METHODS OF PREPARATION THEREOF - A polymeric membrane includes an active layer over a support, wherein the active layer includes at least two chemically distinct polyamide films. A first one of the films is in contact with the support, and a second one of the films is not in contact with the support. The second polyamide film is crosslinked with the first polyamide film at an interface therewith, and the second polyamide film includes a structure having a side chain group including an ammonium salt. | 09-27-2012 |
20120248032 | Curable Compositions And Membranes - A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 20 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and an anionic group; (iii) 15 to 45 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; wherein the composition has a pH of 0.8 to 12. The compositions are useful for preparing ion exchange membranes. | 10-04-2012 |
20120305473 | COMPOSITE SEMIPERMEABLE MEMBRANE AND METHOD OF PRODUCING THE SAME - Provided is a composite semipermeable membrane having a polyamide separation-functional layer on a porous support layer, wherein the polyamide separation-functional layer has a yellow index of 10 to 40, and the actual length of the polyamide separation-functional layer per 1 μm-length of the porous support layer is from 2 μm to 5 μm, or a composite semipermeable membrane having on a porous support layer a polyamide separation-functional layer prepared by polycondensation of polyfunctional amines with polyfunctional acid halides, wherein the polyamide separation-functional layer is formed by the steps of (A) interfacial polycondensation in which polyfunctional amines and polyfunctional acid halides are brought into contact at 40° C. to 70° C. and subsequent (B) heat treatment at 70° C. to 150° C. The composite semipermeable membrane according to the present invention has high boron removal performance and high water permeation performance. | 12-06-2012 |
20130037482 | COMPOSITE SEPARATION MEMBRANE AND SEPARATION MEMBRANE ELEMENT USING THE SAME - The present invention provides a composite separation membrane with improved separation performance, particularly with an increased permeation flux. The composite separation membrane of the present invention includes a porous support ( | 02-14-2013 |
20130146530 | MEMBRANE, WATER TREATMENT SYSTEM, AND METHOD OF MAKING - One aspect of the present invention includes a membrane. The membrane includes a porous support and a polymeric layer disposed on the porous support. The membrane further includes a plurality of substantially hydrophobic mesoporous nanoparticles disposed within the polymeric layer. A water treatment system and a method of making a membrane are also presented. | 06-13-2013 |
20140263036 | FLEXIBLE FREE-STANDING ULTRATHIN OR THIN PROTEIN MEMBRANE - A flexible porous free-standing protein membrane includes cross-linked protein. At least part of pores of the porous membrane is formed by removing nanostrands whose diameters are 2-3 nm, the cross-linked protein is cross-linked by a bifunctional cross-linker, and a thickness of the protein membrane is 10 μm or less. | 09-18-2014 |
20140311969 | WATER-TREATMENT SEPARATING MEMBRANE OF HIGH FLUX HAVING GOOD CHLORINE RESISTANCE - A water-treatment separating membrane includes a polyamide active layer formed on999 a porous support. The ratio of a maximum value with respect to a minimum value of a ratio of a peak height of a C=O double bond of a carboxyl group (—COOH) with respect to a peak height of a C=O double bond combined with an amide group (—CONH—) is from 1.2 to 4, when measured after acid treating the polyamide active layer and by using a Fourier transform infrared spectrometer (FTIR). | 10-23-2014 |
20140319051 | WATER-TREATMENT SEPARATING MEMBRANE OF HIGH FLUX HAVING GOOD CHLORINE RESISTANCE - A water-treatment separating membrane includes a polyamide active layer formed on a porous support. When the polyamide active layer is dyed using a 5% aqueous solution of Rhodamine B, at least a curve pattern formed by connecting two or more arcs is formed in at least a partial area of the polyamide active layer. | 10-30-2014 |
20140353242 | WATER-TREATMENT SEPARATING MEMBRANE OF HIGH FLUX HAVING GOOD CHLORINE RESISTANCE AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing a water-treatment separating membrane includes forming an aqueous amine solution layer on a porous support, and forming a polyamide active layer by dropping droplets of an organic solution including an acyl halide compound on the aqueous amine solution layer. A water-treatment separating membrane manufactured by the same also is provided. | 12-04-2014 |
20150321151 | HIGH PERMEATE FLUX REVERSE OSMOSIS MEMBRANE INCLUDING SURFACE-TREATED ZEOLITE AND METHOD OF MANUFACTURING THE SAME - The present invention relates to a reverse osmosis membrane including: a porous support; and a polyamide active layer formed on the porous support and including zeolite, surface-treated with a compound having at least one functional group selected from a group consisting of an amino group and a glycidyl group, and a method of manufacturing the same. | 11-12-2015 |
20160074816 | ANTIBIOFOULING MEMBRANES AND METHODS FOR PRODUCTION - Disclosed herein is a composite filtration membrane comprising a porous support membrane and an antibiofouling polyamide layer on the porous support membrane. Also disclosed herein is a method for manufacturing the composite filtration membrane and a cross-linked copolymer. | 03-17-2016 |
20160151748 | REVERSE OSMOSIS OR NANOFILTRATION MEMBRANES AND METHOD FOR PRODUCTION THEREOF | 06-02-2016 |
20160193572 | Novel Flux Enhancing Agent for Improving Composite Polyamide Reverse Osmosis Membrane Performance | 07-07-2016 |
210500390 | Imide | 4 |
20090107908 | Thermally, Heat and Chemically Resistant Ultrafiltration Polyimide Membrane and Method for its Production - A thermally, heat and chemically stable polyimide asymmetric ultrafiltration membrane, is a porous film or a hollow fiber, having an anisotropic structure a selective surface layer and a substrate, wherein the selective ultraporous surface layer has size of pores 70-800 Å with thickness 0.1-10 mcm and is composed of insoluble rigid-chain aromatic (co)polyimide based on dianhydride of aromatic tetracarbonic acid and aromatic diamine and located on the microporous substrate with thickness 50-250 mcm, and the membrane has water permeability Q=(2-500)·10 | 04-30-2009 |
20100025322 | Micro-Fluidic Device Having an Improved Filter Layer and Method for Assembling A Micro-Fluidic Device - A method for assembling a micro-fluidic device better preserves the integrity of a filter in a filter layer and simplifies the bonding of the filter layer to the channel layers on each side of the filter layer. The method includes aligning a polymer layer having a plurality of filter elements and a plurality of fluid passages arranged between the filter elements between two substrates of a micro-fluidic device, and bonding the polymer layer between the two substrates to seal an area between the filter elements and the fluid passages to enable fluid flow through the filter elements to be segregated from fluid flow through the fluid passages. | 02-04-2010 |
20110253621 | METHOD OF MANUFACTURING HYDROPHILIC MEMBRANE HAVING IMPROVED ANTIFOULING PROPERTY AND HYDROPHILIC MEMBRANE MANUFACTURED BY THE METHOD - A method of manufacturing a hydrophilic membrane and hydrophilic membranes having improved antifouling property using a supercritical fluid or a subcritical fluid. The method involves combining a coating solution from a hydrophilic group-containing monomer, an initiator, a cross-linking agent and a supercritical fluid or subcritical fluid in a high pressure solution vessel and transferring the coating solution to a membrane in a high pressure coating vessel, coating the surfaces and micropores of the membranes through cross-linking polymerization reactions. Non-reacted coating material is returned to the high pressure solution vessel. The membranes are removed from the coating vessel, cleaned and dried. The hydrophilic membrane manufactured by the present invention is excellent in properties of hydrophobic membranes such as thermal stability, chemical stability and mechanical strength, and surfaces and micropores of the membranes are uniformly coated. | 10-20-2011 |
20180021739 | POLYIMIDE AND/OR POLYAMIDEIMIDE POROUS BODY AND METHOD FOR MANUFACTURING SAME, METHOD FOR SEPARATION AND/OR ADSORPTION, SEPARATION MATERIAL, ADSORPTION MATERIAL, FILTER MEDIA, LAMINATE, AND FILTER DEVICE | 01-25-2018 |