Alkene Other Than Vinyl Patents (Class 210/500.36)
-
Publication number: 20150079392Abstract: Provided are a fluororesin microporous membrane having a narrow pore-size distribution and a smaller difference between a mean flow pore size and a maximum pore size, a method for producing the fluororesin microporous membrane, and a filter element that uses the fluororesin microporous membrane. The fluororesin microporous membrane is a porous membrane obtained by forming fluororesin particles into a membrane having a particular shape and particular dimensions, baking the fluororesin particles together by heating the membrane to a melting point of the membrane or higher, and then stretching the membrane. The fluororesin particles each have a structure in which a heat of fusion of a fluororesin constituting an outer surface portion of the particle is lower than a heat of fusion of polytetrafluoroethylene constituting an inside portion of the particle.Type: ApplicationFiled: April 2, 2013Publication date: March 19, 2015Applicant: SUMITOMO ELECTRIC FINE POLYMER, INC.Inventors: Fumihiro Hayashi, Aya Murata, Atsushi Uno
-
Patent number: 8945390Abstract: A carbon membrane formed by carbonizing a phenol resin having at least one kind of atomic groups among a methylene bond, a dimethylene ether bond, and a methylol group, wherein the total mole content of the atomic groups is 100 to 180% with respect to the phenolic nuclei. A pervaporation separation method using the carbon membrane is also disclosed.Type: GrantFiled: September 17, 2012Date of Patent: February 3, 2015Assignee: NGK Insulators, Ltd.Inventors: Akimasa Ichikawa, Kenji Suzuki, Naoto Kinoshita, Yoshinori Isoda, Takafumi Kimata
-
Publication number: 20150021261Abstract: An object of the present invention is to provide porous polymer membranes with good water permeability and good hydrophilicity. The present invention relates to a porous polymer membrane including a copolymer (A) containing vinyl alcohol units and tetrafluoroethylene units, wherein an alternating ratio of the vinyl alcohol units and the tetrafluoroethylene units is at least 30%.Type: ApplicationFiled: December 26, 2012Publication date: January 22, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuko Shiotani, Yoshito Tanaka, Kengo Ito, Jun Miki
-
Patent number: 8925737Abstract: A crystalline polymer microporous membrane, which contains: a laminate of two or more layers including a layer containing a first crystalline polymer and a layer containing a second crystalline polymer, the laminate having a plurality of pores each piercing through the laminate in a thickness direction thereof, wherein the first crystalline polymer has higher crystallinity than crystallinity of the second crystalline polymer, and the layer containing the first crystalline polymer has the maximum thickness thicker than the maximum thickness of the layer containing the second crystalline polymer, and wherein at least one layer in the laminate has a plurality of pores whose average diameter continuously or discontinuously changes along with a thickness direction of the laminate at least at part thereof.Type: GrantFiled: March 22, 2011Date of Patent: January 6, 2015Assignee: FUJIFILM CorporationInventors: Kenichi Ishizuka, Nobuhiro Nishita
-
Publication number: 20140339155Abstract: The invention offers a porous polytetrafluoroethylene membrane, which is a porous resin membrane produced by the following steps: preparing multiple types of polytetrafluoroethylene each having a different quantity of heat of fusion; using each of the multiple types of polytetrafluoroethylene to form a membrane composed of a fluororesin consisting mainly of polytetrafluoroethylene; heating each membrane to its melting point or above to bake it, so that multiple types of nonporous resin membranes are produced; stacking the multiple types of nonporous resin membranes in the order of the magnitude of the quantity of heat of fusion of the polytetrafluoroethylene used to produce each of the nonporous resin membranes; bonding the stacked membranes with each other; and stretching the bonded membranes to form the porous resin membrane. The porous polytetrafluoroethylene membrane has a mean flow pore diameter of 50 nm or less.Type: ApplicationFiled: December 4, 2012Publication date: November 20, 2014Applicant: Sumitomo Electric Fine Polymer, Inc.Inventors: Fumihiro Hayashi, Aya Oya, Atsushi Uno
-
Publication number: 20140238939Abstract: The present invention discloses antimicrobial water treatment membranes, comprising a water treatment membrane, covalently attached to one or more antimicrobial polymers or derivatives thereof, either directly or via one or more tether molecules. There are also provided a process for preparing these antimicrobial membranes, and uses thereof in water treatment applications.Type: ApplicationFiled: June 14, 2012Publication date: August 28, 2014Applicants: WISCONSIN ALUMNI RESEARCH FOUNDATION, BENIGURION UNIVERSITY OF THE NEGEV RESEARCH AND DEVELOPMENT AUTHORITYInventors: Ron Kasher, Shani Avneri, Marina Yamit Lutsky, Jihua Zhang, Samuel Helmer Gellman, Shannon Stahl
-
Publication number: 20140231341Abstract: Porous PTFE membranes comprising a first porous surface and a second porous surface, and a bulk between the first porous surface and the second porous surface, wherein the membrane has a pore rating of from about 2 nanometers to about 50 nanometers, and the first and second porous surfaces each comprise a ratio of non-fused nodule area to fused nodule area of about 1 or greater, and methods of making and using the membranes, are disclosed.Type: ApplicationFiled: February 15, 2013Publication date: August 21, 2014Applicant: Pall CorporationInventors: Andrew T. SITTERER, Amarnauth Singh, Joanna Fielding, Thomas C. Gsell, Michael G. Ishee
-
Publication number: 20140231340Abstract: Composites including porous PTFE membranes comprising an intermediate PTFE membrane having a pore rating of from about 2 nanometers to about 20 nanometers, interposed between, and bound to, porous fluoropolymer membranes having larger pore ratings, and methods of making and using the composites, are disclosed.Type: ApplicationFiled: February 15, 2013Publication date: August 21, 2014Applicant: Pall CorporationInventors: Thomas C. Gsell, Michael G. Ishee, Amarnauth Singh, Joanna Fielding
-
Membrane distillation modules using oleophobically and antimicrobially treated microporous membranes
Patent number: 8801933Abstract: The present invention provides a system for liquid distillation which includes a vapor permeable-liquid impermeable microporous membrane having structures defining a plurality of pores, an oleophobic material that is applied to the structures of the membrane so as to leave the plurality of pores open, a means for supplying non-distilled liquid to the first side of the membrane, and a means for collecting distilled liquid from a second side of the membrane. In a further example, the present invention provides a method for the distillation of liquids.Type: GrantFiled: September 15, 2011Date of Patent: August 12, 2014Assignee: BHA Altair, LLCInventors: Vishal Bansal, Christopher Keller -
Patent number: 8789708Abstract: Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength.Type: GrantFiled: October 30, 2013Date of Patent: July 29, 2014Assignee: Entegris, Inc.Inventors: Jijun Ge, Alketa Gjoka, Jieh-Hwa Shyu
-
Patent number: 8757395Abstract: Novel porous PTFE membranes are described possessing a unique combination of high strength, low flow resistance, and small pore size. Additionally, unique constructions with superior filtration and venting properties incorporating porous PTFE membranes are described.Type: GrantFiled: September 16, 2008Date of Patent: June 24, 2014Assignee: W. L. Gore & Associates, Inc.Inventors: John E. Bacino, Alex R. Hobson, Jason J. Strid
-
Patent number: 8758625Abstract: Use of a porous hollow fiber membrane for producing a clarified biomedical culture medium by a method including a filtration step of distributing a biomedical culture medium over the porous hollow fiber membrane, a tube wall of the hollow fiber membrane being constituted of a blend of a hydrophobic polymer and polyvinylpyrrolidone. A content of the polyvinylpyrrolidone is not lower than 0.2% by mass and not higher than 3% by mass relative to a total mass of the porous hollow fiber membrane, and, when the tube wall is divided in a membrane-thickness direction equally into three regions, a content of the polyvinylpyrrolidone in an outer circumferential region including an outer face is higher than a content of the polyvinylpyrrolidone in an inner circumferential region including an inner face, and an average pore size in the inner face is larger than an average pore size in the outer face.Type: GrantFiled: September 25, 2009Date of Patent: June 24, 2014Assignees: Asahi Kasei Chemicals Corporation, Asahi Kasei Medical Co., Ltd.Inventors: Chihiro Kato, Yuukou Seki, Satoshi Shiki
-
Publication number: 20140151288Abstract: Technologies are generally described for composite membranes which may include a porous graphene layer in contact with a porous support substrate. In various examples, a surface of the porous support substrate may include at least one of: a thermo-formed polymer characterized by a glass transition temperature, a woven fibrous membrane, and/or a nonwoven fibrous membrane. Examples of the composite membranes permit the use of highly porous woven or nonwoven fibrous support membranes instead of intermediate porous membrane supports. In several examples, the composite membranes may include porous graphene layers directly laminated onto the fibrous membranes via the thermo-formed polymers. The described composite membranes may be useful for separations, for example, of gases, liquids and solutions.Type: ApplicationFiled: November 30, 2012Publication date: June 5, 2014Applicant: Empire Technology Development LLCInventors: Seth Adrian Miller, Gary L. Duerksen
-
Patent number: 8739976Abstract: A crystalline polymer microporous membrane containing a crystalline polymer microporous film containing a crystalline polymer, and having an asymmetric pore structure; fluorine alcohol covering at least part of an exposed surface of the crystalline polymer microporous film; and a crosslinking agent, wherein the fluorine alcohol is crosslinked with assistance of the crosslinking agent.Type: GrantFiled: November 24, 2010Date of Patent: June 3, 2014Assignee: FUJIFILM CorporationInventors: Kenichi Ishizuka, Nobuhiro Nishita
-
Patent number: 8739978Abstract: Disclosed is a porous membrane with high tensile strength, good elongation at break, and good water permeability, and a method for manufacturing the same. The porous membrane comprises a bead structure including plural spherical crystallites, wherein macro voids isolated from one another with the plural spherical crystallites are formed in an outer surface side of the porous membrane.Type: GrantFiled: August 17, 2009Date of Patent: June 3, 2014Assignee: Kolon Industries Inc.Inventors: Joon-Khee Yoon, Moo-Seok Lee
-
Patent number: 8709254Abstract: A microporous organic-inorganic hybrid membrane based on silica of the invention has an average pore diameter of less than 0.6 nm, and comprises bridging organosilane moieties of the formula ?O1.5Si—CHR—SiO1.5? or ?O1.5Si—CH(CH3)—SiO1.5?. The membrane can be used in the separation of hydrogen from mixtures comprising hydrogen and CH4, CO2, CO, N2, and the like, and in the separation of water from alcohols having 1-3 carbon atoms, optionally in the presence of an inorganic or organic acid.Type: GrantFiled: July 14, 2009Date of Patent: April 29, 2014Assignee: Stichting Energieonderzoek Centrum NederlandInventors: Rob Kreiter, Hessel Lennart Castricum, Jaap Ferdinand Vente, Johan Evert Ten Elshof, Maria Dirkje Anna Rietkerk, Henk Martin Veen
-
Patent number: 8695812Abstract: A water-proof sound-transmitting membrane 10 includes a polytetrafluoroethylene porous membrane 1 and has a surface density of 1 to 20 g/m2. The polytetrafluoroethylene porous membrane 1 includes a first porous layer 1a, and a second porous layer 1b stacked on and integrated with the first porous layer 1a by a binding force acting between polytetrafluoroethylene matrices.Type: GrantFiled: July 11, 2008Date of Patent: April 15, 2014Assignee: Nitto Denko CorporationInventors: Yuri Horie, Kouji Furuuchi
-
Patent number: 8668093Abstract: Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength.Type: GrantFiled: May 11, 2011Date of Patent: March 11, 2014Assignee: Entegris, Inc.Inventors: Jijun Ge, Alketa Gjoka, Jieh-Hwa Shyu
-
Patent number: 8663530Abstract: A water-proof sound-transmitting membrane 10 includes a polytetrafluoroethylene porous membrane 1 and has a surface density of 1 to 20 g/m2. The polytetrafluoroethylene porous membrane 1 includes a first porous layer 1a, and a second porous layer 1b stacked on and integrated with the first porous layer 1a by a binding force acting between polytetrafluoroethylene matrices.Type: GrantFiled: December 13, 2012Date of Patent: March 4, 2014Assignee: Nitto Denko CorporationInventors: Yuri Horie, Kouji Furuuchi
-
Publication number: 20130341277Abstract: A reverse osmosis (RO) membrane can include a porous substrate, a multilayer film arranged on the substrate, which includes a first layer including a polyelectrolyte and a second layer including a plurality of clay particles, where the first layer is arranged adjacent to the second layer. The multilayer film can be prepared by a spray-LbL process. The resulting RO membrane can provide high water permeability combined with high salt rejection.Type: ApplicationFiled: June 25, 2013Publication date: December 26, 2013Inventors: Jason R. Kovacs, Paula T. Hammond
-
Publication number: 20130334130Abstract: A conformal coating that resists fouling by waterborne contamination in aquatic environments, a method for fabricating the coating, and a filter having such a coating are disclosed. The coating comprises a hydrophilic polymer and a surfactant wherein the surfactant undergoes a phase change upon exposure to a saline solution. Also disclosed are in situ methods for regenerating anti-fouling filters having the fouling resistant coating.Type: ApplicationFiled: June 14, 2012Publication date: December 19, 2013Inventors: Rahul Ganguli, Vivek Mehrotra, Tony Ten-Luen Liao
-
Patent number: 8602223Abstract: The invention relates to a micro-porous membrane comprising a porous membrane carrier made of a first polymeric material (A) and comprising a second polymeric material (B) intimately divided throughout the porous membrane carrier, wherein the porous membrane carrier comprises a plurality of interconnected polymeric fibers, fibrils, filaments and/or lamellae having a thickness of less than 1 ?m, the porous membrane carrier has an interconnected open porous structure formed by the plurality of interconnected polymeric fibers, fibrils, filaments and/or lamellae and a porosity of at least 50%; and the polymeric material (B) comprises a thermoplastic polycondensation polymer and is present in an amount of at most 30 wt. %, relative to the total weight of (A) and (B).Type: GrantFiled: November 14, 2008Date of Patent: December 10, 2013Assignee: DSM IP Assets B.V.Inventors: Jun Qiu, Rudy Rulkens, Johannes L. M. OP Den Kamp, Jens C Thies
-
Patent number: 8597518Abstract: In one embodiment, a membrane comprises: a nonporous, hydrophobic selective layer configured to be on a feed solution side of the membrane and polyethylene layer configured to be on a permeate side of the membrane, wherein the membrane is configured to selectively separate an organic component from an aqueous solution. In some embodiments, the method for separating an organic component from an aqueous stream can comprise: contacting a nonporous, hydrophobic selective layer of a membrane with the aqueous stream comprising the organic component, creating a vacuum on the side of the membrane comprising the support layer, permeating the organic component through the membrane into an exit chamber, and removing the organic component permeate from the exit chamber.Type: GrantFiled: August 19, 2010Date of Patent: December 3, 2013Assignee: The University of ConnecticutInventors: Richard S. Parnas, Si-Yu Li
-
Publication number: 20130284672Abstract: A method for cross-linking a styrenic polymer, the method comprising providing a partly sulphonated styrenic polymer and cross-linking the partly sulphonated styrenic polymer in the presence of a polyphosphoric acid.Type: ApplicationFiled: January 6, 2012Publication date: October 31, 2013Inventors: Zijun Xia, Jianhua Fang, Russell James MacDonald, Su Lu, Hai Yang, John Harold Barber
-
Patent number: 8557022Abstract: A method of manufacturing a filled polymeric membrane includes a first step of preparing a filler suspension having a solvent for a glassy polymer and nanometer-sized particles. The nanometer-sized particles in the filler suspension are aggregated in aggregates having an average aggregate size in the range between 50 nm and smaller than 200 nm. In a following step, the glassy polymer is added to the filler suspension to obtain a polymer suspension. Next, the glassy polymer is dissolved in the polymer suspension. In a next step, the polymer suspension is cast on a substrate, followed by a step of removing the solvent. A filled polymeric membrane includes aggregates of nanometer-sized filler particles. The membrane is used in pervaporation and nanofiltration.Type: GrantFiled: August 25, 2008Date of Patent: October 15, 2013Assignee: Vlaamse Instelling Voor Technologisch Onderzoek N.V. (VITO)Inventors: Kristien De Sitter, Steven Mullens, Lieven Gevers
-
Patent number: 8540081Abstract: A hollow fiber membrane fluid transport device and its method of manufacture are disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: GrantFiled: March 16, 2011Date of Patent: September 24, 2013Assignee: Markel CorporationInventors: Robert Edward Jerman, Cornelius Brown, Jr., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
-
Publication number: 20130228519Abstract: The present invention is directed to ultrafiltration membranes comprising a microporous material, said microporous material comprising: (a) a polyolefin matrix present in an amount of at least 2 percent by weight, (b) finely divided, particulate, substantially water-insoluble silica filler distributed throughout said matrix, said filler constituting from about 10 percent to about 90 percent by weight of said microporous material substrate; and (c) at least 35 percent by volume of a network of interconnecting pores communicating throughout the microporous material. The present invention is also directed to methods of separating suspended or dissolved materials from a fluid stream such as a liquid or gaseous stream, comprising passing the fluid stream through the ultrafiltration membrane described above.Type: ApplicationFiled: August 30, 2012Publication date: September 5, 2013Applicant: PPG INDUSTRIES OHIO, INC.Inventors: Qunhui Guo, Carol L, Knox, Raphael O. Kollah, Justin J. Martin, Timothy A. Okel, Daniel E. Rardon, Christine Gardner, Shantilal M. Mohnot
-
Publication number: 20130228529Abstract: The present invention is directed to microfiltration membranes comprising a microporous material, said microporous material comprising: (a) a polyolefin matrix present in an amount of at least 2 percent by weight, (b) finely divided, particulate, substantially water-insoluble silica filler distributed throughout said matrix, said filler constituting from about 10 percent to about 90 percent by weight of said microporous material substrate, wherein the weight ratio of filler to polyolefin is greater than 4:1; and (c) at least 35 percent by volume of a network of interconnecting pores communicating throughout the microporous material. The present invention is also directed to methods of separating suspended or dissolved materials from a fluid stream such as a liquid or gaseous stream, comprising passing the fluid stream through the microfiltration membrane described above.Type: ApplicationFiled: August 30, 2012Publication date: September 5, 2013Applicant: PPG Industries Ohio, Inc.Inventors: Qunhui Guo, Carol L. Knox, Raphael O. Kollah, Justin J. Martin, Timothy A. Okel, Daniel E. Rardon, Christine Gardner, Shantilal M. Mohnot
-
Patent number: 8506815Abstract: A method of removing water from fluid mixtures of the water with other compounds uses selective vapor permeation or pervaporation of the water, as the case may be, from the mixture through a membrane having an amorphous perfluoropolymer selectively permeable layer. The novel process can be applied in such exemplary embodiments as (a) removing water from mixtures of compounds that have relative volatility of about 1-1.1 or that form azeotropic mixtures with water, (b) the dehydration of hydrocarbon oil such as hydraulic fluid to concentrations of water less than about 50 ppm, (c) removing water byproduct of reversible chemical equilibrium reactions to favor high conversion of reactants to desirable products, (d) drying ethanol to less than 0.5 wt. % water as can be used in fuel for internal combustion engines, and (e) controlling the water content to optimum concentration in enzyme-catalyzed chemical reactions carried out in organic media.Type: GrantFiled: July 19, 2012Date of Patent: August 13, 2013Assignee: CMS Technologies Holdings Inc.Inventors: Stuart M. Nemser, Sudipto Majumdar, Kenneth J. Pennisi
-
Patent number: 8409482Abstract: According to one embodiment of the present invention, there is provided a porous member formed by providing a member formed of a fluororesin containing carbon fiber and having a predetermined shape and exposing the member to an oxidizing gas to remove the carbon fiber contained in the member.Type: GrantFiled: February 23, 2009Date of Patent: April 2, 2013Assignee: Tokyo Electron LimitedInventors: Jiro Higashijima, Satoshi Kaneko
-
Patent number: 8356717Abstract: Hydrophilic porous substrates, methods of making hydrophilic porous substrates from hydrophobic polymers are disclosed.Type: GrantFiled: October 8, 2008Date of Patent: January 22, 2013Assignee: 3M Innovative Properties CompanyInventors: Clinton P. Waller, Jr., Douglas E. Weiss
-
Publication number: 20130004454Abstract: Oligo- or polyurethane compounds of the formula (I) wherein k and n independently are numbers from 1 to 100, m is from the range 1-100, (X) is a block of formula (II) and (Y) is a block of the formula (III), (A) is a residue of an aliphatic or aromatic diisocyanate linker, (B) is a residue of a linear oligo- or polysiloxane containing alkanol end groups, and optionally further containing one or more aliphatic ether moieties, and (C) is an aromatic oligo- or polysulfone block, may advantageously be used as anti-adhesion additives in polymer compositions e.g. for membranes; related oligo- or polyurethanes wherein m is 0 are especially suitable for the preparation of antimicrobial water separation membranes.Type: ApplicationFiled: March 1, 2011Publication date: January 3, 2013Applicant: POLYMERS CRC LTD.Inventors: Thomas Weiss, Jaleh Mansouri
-
Publication number: 20120318730Abstract: A polymer membrane for water treatment composed of a vinyl chloride copolymer comprising a vinyl chloride monomer and a hydrophilic monomer.Type: ApplicationFiled: March 2, 2011Publication date: December 20, 2012Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Toshihiro Tamai, Yuki Goto, Takashi Osugi, Ryuichi Matsuo, Naotaka Oyabu
-
Patent number: 8313651Abstract: The present invention discloses a membrane stack comprising a first and second membrane layers, and a spacer layer disposed between said first and second membrane layers, said membrane stack configured such that fluid passes through said membrane stack in a direction substantially perpendicular to the plane of said membrane layers and said spacer layer. The application also discloses a module comprising a membrane as described above, said module having a fluid flow path that is substantially perpendicular to the plane of the major surface of the membrane and spacer layers ins aid membrane stack.Type: GrantFiled: June 27, 2011Date of Patent: November 20, 2012Assignee: Natrix Separations Inc.Inventors: Ronald F. Childs, Elena N. Komkova, Donna Lisa Crossley, Alicja M. Mika
-
Patent number: 8292090Abstract: The present invention provides for a method of producing an integral multilayered porous membrane by simultaneously co-casting a plurality of polymer solutions onto a support to form a multilayered liquid sheet and immersing the sheet into a liquid coagulation bath to effect phase separation and form a porous membrane. The support can be a temporary support or form an integrated support for the membrane. The plurality of layers may be of the same polymer or different, same concentration or viscosity or different and may be subjected to the same processing conditions or different ones to form unique structures.Type: GrantFiled: September 29, 2004Date of Patent: October 23, 2012Assignee: EMD Millipore CorporationInventor: Willem Kools
-
Patent number: 8292091Abstract: The present invention provides for a method of producing an integral multilayered porous membrane by simultaneously co-casting a plurality of polymer solutions onto a support to form a multilayered liquid sheet and immersing the sheet into a liquid coagulation bath to effect phase separation and form a porous membrane. The support can be a temporary support or form an integrated support for the membrane. The plurality of layers may be of the same polymer or different, same concentration or viscosity or different and may be subjected to the same processing conditions or different ones to form unique structures.Type: GrantFiled: April 12, 2006Date of Patent: October 23, 2012Assignee: EMD Millipore CorporationInventor: Willem Kools
-
Patent number: 8277661Abstract: A hydrothermally stable, microporous organic-inorganic hybrid membrane based on silica, having an mean pore diameter of between 0.2 and 1.5 nm, is characterised in that between 5 and 40 mole % of the Si—O—Si bonds have been replaced by moieties having the one of the formulas: Si—{[CmH(n-1)X]—Si—}q, Si—[CmH(n-2)X2]—Si or Si—CmHn—Si{(CmHn)—Si—}y in which m=1-8, n=2m, 2m?2, 2m?4, 2m?6 or 2m?8; provided that n?2, X=H or (CH2)pSi, p=0 or 1, and q=1, 2, 3 or 4. The membrane can be produced by acid-catalysed hydrolysis of suitable bis-silane precursors such as bis(trialkoxysily)alkanes, preferably in the presence of monoorganyl-silane precursors such as trialkoxy-alkylsilanes.Type: GrantFiled: January 16, 2007Date of Patent: October 2, 2012Assignee: Stichting Energieonderzoek Centrum NederlandInventors: Ashima Sah, Hessel Lennart Castricum, Jaap Ferdinand Vente, David Hermanus Adrianus Blank, Johan Evert Ten Elshof
-
Patent number: 8272517Abstract: The present invention provides a water-proof sound-transmitting membrane including a polytetrafluoroethylene (PTFE) porous membrane, in which the waterproofness is enhanced further with little lowering of the sound transmittance. The water-proof sound-transmitting membrane includes the PTFE porous membrane. The PTFE porous membrane includes a first porous layer, and a second porous layer stacked on and integrated with the first porous layer by a binding force acting between PTFE matrices. The first porous layer and the second porous layer each are composed of PTFE with a number-average molecular weight of 5.0×107 or more determined by a standard specific gravity method. At least one layer selected from the first porous layer and the second porous layer has an average pore diameter of 1 ?m or less. The water-proof sound-transmitting membrane has a surface density of 1 g/m2 to 10 g/m2.Type: GrantFiled: January 19, 2011Date of Patent: September 25, 2012Assignee: Nitto Denko CorporationInventors: Yuri Horie, Yuuichi Abe, Kouji Furuuchi, Kousei Takiishi
-
Publication number: 20120234745Abstract: A hollow fiber membrane fluid transport device and its method of manufacture are disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film.Type: ApplicationFiled: March 16, 2011Publication date: September 20, 2012Inventors: Robert Edward Jerman, Cornelius Brown, JR., Kenneth Donald Hobbs, Carlos Ruano, Charles Edward Wolanski
-
Patent number: 8205754Abstract: A fluorine resin polymer separation membrane and a manufacturing method of the same, which are excellent in a virus-eliminating property, further excellent in water permeability, chemical strength (chemical resistance), physical strength, and an antifouling property, and particularly suitable for practicable use as a filtration membrane for the elimination of viruses, are provided. A fluorine resin polymer separation membrane includes a layer having a three-dimensional network structure and a layer having a spherical structure, in which the layer having a three-dimensional network structure does not substantially contain micro-voids having a void diameter of 5 ?m or more, and the fluorine resin polymer separation membrane has filtration performance represented by the elimination rate of 80% or more of dextran having molecular weight of 75,000. The layer having a three-dimensional network structure is formed by the solidification with a polymer solution containing a fluorine resin polymer and cellulose ester.Type: GrantFiled: July 25, 2006Date of Patent: June 26, 2012Assignee: Toray Industries, Inc.Inventors: Masayuki Hanakawa, Shin-ichi Minegishi
-
Patent number: 8197745Abstract: A permselective asymmetric hollow fiber membrane for the separation of toxic mediators from blood, a process for the preparation of such a membrane, and the use of such a membrane in hemodialysis, hemodiafiltration, and hemofiltration for treatment of toxic mediator-related diseases.Type: GrantFiled: February 14, 2012Date of Patent: June 12, 2012Assignee: Gambro Lundia ABInventors: Reinhold Buck, Hermann Goehl
-
Patent number: 8181792Abstract: The present invention provides for a method of producing an integral multilayered porous membrane by simultaneously co-casting a plurality of polymer solutions onto a support to form a multilayered liquid sheet and immersing the sheet into a liquid coagulation bath to effect phase separation and form a porous membrane. The support can be a temporary support or form an integrated support for the membrane. The plurality of layers may be of the same polymer or different, same concentration or viscosity or different and may be subjected to the same processing conditions or different ones to form unique structures.Type: GrantFiled: April 20, 2010Date of Patent: May 22, 2012Assignee: EMD Millipore CorporationInventor: Willem Kools
-
Patent number: 8182694Abstract: The present application discloses a membrane stack comprising a first and second membrane layers, and a spacer layer disposed between said first and second membrane layers, said membrane stack configured such that fluid passes through said membrane stack in a direction substantially perpendicular to the plane of said membrane layers and said spacer layer. The application also discloses a module comprising a membrane as described above, said module having a fluid flow path that is substantially perpendicular to the plane of the major surface of the membrane and spacer layers in said membrane stack.Type: GrantFiled: April 7, 2005Date of Patent: May 22, 2012Assignee: Natrix Separations Inc.Inventors: Ronald F. Childs, Elena N. Komkova, Alicja M. Mika, Donna Lisa Crossley
-
Patent number: 8163814Abstract: Azidoaryl-substituted cyclooctene monomers and synthesized and used in the preparation of various copolymers. Among these copolymers are those prepared from ring-opening metathesis polymerization of cyclooctene, polyethylene glycol-substituted cyclooctene, and azidoaryl-substituted cyclooctene. These copolymers are useful in the formation of crosslinked films that reduce fouling of water purification membranes.Type: GrantFiled: February 11, 2011Date of Patent: April 24, 2012Assignees: The University of Massachusetts, Board of Regents, The University of Texas SystemInventors: Todd Shannon Emrick, Kurt Breitenkamp, Ravindra Revanur, Benny D. Freeman, Bryan McCloskey
-
Patent number: 8153041Abstract: To provide a membrane capable of efficiently collecting fine particles for a long period of time, disclosed is a polytetrafluoroethylene microporous membrane wherein the mean pore size in the surface of the membrane is larger than the mean pore size in the back thereof and the mean pore size continuously changes from the surface toward the back.Type: GrantFiled: November 11, 2010Date of Patent: April 10, 2012Assignee: FUJIFILM CorporationInventors: Hidetaka Okada, Kouhei Kawahara, Toshiki Taguchi
-
Patent number: 8151998Abstract: To provide a crystalline polymer microporous membrane including: a microstructure on the side of one surface of the membrane, the microstructure being composed of series of nodules interconnected with one another by fibrils, wherein the average pore diameter at the one surface of the membrane is larger than the average pore diameter at another surface of the membrane, and the average pore diameter continuously changes from the one surface toward the other surface, and wherein the nodules have an aspect ratio (length/width) of 25 or greater.Type: GrantFiled: August 28, 2009Date of Patent: April 10, 2012Assignee: Fujifilm CorporationInventor: Hirohisa Hokazono
-
Patent number: 8141717Abstract: The present invention provides sintered polymeric materials and methods of making the same which are useful in a variety of applications. In one embodiment, the present invention provides a sintered polymeric material comprising at least one plastic and at least one elastomer.Type: GrantFiled: August 20, 2007Date of Patent: March 27, 2012Assignee: Porex CorporationInventors: James P. Wingo, Michael E. Witover, Guoqiang Mao, Andre Maertens, Gerald Kunth, Daniel George Fullerton, Ike Iaokim Haldopoulos, Take Huat Tan, Deborah B. Reed
-
Patent number: 8136676Abstract: One object of the present invention is to provide polymers suitable for use as medical materials. The present invention provides a polymer useful as a medical material having the general formula -(A)1-(B)m—(C)n—??(I) in which A is derived from an alkoxyalkyl (alkyl)acrylate monomer; B is derived from a monomer containing a primary, secondary, tertiary or quaternary amine group; C is derived from a non-ionic monomer; and 1+m+n=100,0<1, m, n<100.Type: GrantFiled: August 11, 2005Date of Patent: March 20, 2012Assignee: University of SouthamptonInventors: Hitoshi Mizomoto, Mark Bradley
-
Patent number: 8136675Abstract: The present invention relates to a permselective asymmetric hollow fibre membrane for the separation of toxic mediators from blood, comprised of at least one hydrophobic polymer and at least one hydrophilic polymer. Further, the present invention relates to a process for the preparation of such a membrane, and the use of said membrane in hemodialysis, hemodiafiltration, and hemofiltration for treatment of toxic mediator-related diseases.Type: GrantFiled: December 18, 2003Date of Patent: March 20, 2012Assignee: Gambro Lundia ABInventors: Reinhold Buck, Hermann Goehl
-
Patent number: 8132676Abstract: Hydrophilic membrane particularly suited for blotting applications, preferably Western blotting. A pre-wet hydrophobic membrane substrate, preferably made of PVDF, is contacted with a monomer solution and subjected to a UV-initiated free radical polymerization step to render the substrate permanently hydrophilic. The resulting membrane exhibits low background fluorescence, high protein binding, excellent retention of protein sample spot morphology, and extended dynamic range (high signal-to-noise ratio, enhanced sample detectability). The membrane demonstrates comparable or higher performance in Western blotting applications than conventional nitrocellulose Western blotting membranes, particularly for protein detection at low sample concentrations, and is directly water-wettable, eliminating the need for an alcohol pre-wet step prior to use.Type: GrantFiled: August 6, 2009Date of Patent: March 13, 2012Assignee: EMD Millipore CorporationInventors: Antoni Peters, Philip Goddard, John Charkoudian, Neil Soice, Dave Brewster, Anja Dedeo