Process Of Preparing A Cellular Product By Removal Of Material From A Solid Polymer-containing Matrix Without Expanding The Matrix; Composition Which Is Nonexpandible And Is Designed To Form A Cellular Product By Said Process; Or Process Of Preparing Said Composition Patents (Class 521/61)
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Patent number: 7151120Abstract: A method for preparing a highly porous, high surface area degradable or partially degradable material. The method comprises the steps of mixing a degradable or partially degradable polymer with a mixed solvent comprising a first solvent and a second solvent, wherein the mixed solvent comprises a ratio higher than 1:1, first solvent to second solvent; gelling the mixture; and treating the gel under conditions whereby a substantially solvent free porous structure is created having a porosity greater than about 80%; wherein the material is mechanically strong and has a complex porous structure with nano fibrous architecture.Type: GrantFiled: October 16, 2002Date of Patent: December 19, 2006Assignee: The Regents of the University of MichiganInventor: Peter X. Ma
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Patent number: 7148264Abstract: The present invention relates to a method of producing one or more macroporous cross-linked polymer particles, which comprises polymerization and cross-linking of divinyl ether monomers in an inert solvent, in which method the polymerization is free radical initiated. The invention also relates to particles so produced, which are useful as separation medium e.g. in RPC or, after suitable derivatization, in other chromatographic methods.Type: GrantFiled: August 9, 2004Date of Patent: December 12, 2006Assignee: GE Healthcare Bio-Sciences ABInventors: Tobias Söderman, Anders Larsson, Philippe Busson
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Patent number: 7115673Abstract: The present photosensitive resin composition 2 comprises a polyamic acid resin 4, a photosensitive agent, a dispersible compound 3 dispersible in the polyamic acid resin 4, and a solvent. The porous resin is obtained by removing the solvent from the photosensitive resin composition 2 to form a composition in which the dispersible compound 3 is dispersed in the polyamic acid resin 4, removing the dispersible compound to make the composition porous, and curing the porous photosensitive resin composition. The porous resin enables forming a fine circuit pattern and has a low dielectric constant and, when used as an insulating layer of a circuit board, brings about improved high frequency characteristics.Type: GrantFiled: December 17, 2003Date of Patent: October 3, 2006Assignee: Nitto Denko CorporationInventors: Amane Mochizuki, Takahiro Fukuoka, Mitsuhiro Kanada, Takayuki Yamamoto, Tomohiro Taruno
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Patent number: 7108922Abstract: A siloxane-based resin having a novel structure and a semiconductor interlayer insulating film using the same. The siloxane-based resins have a low dielectric constant in addition to excellent mechanical properties and are useful materials in an insulating film between interconnecting layers of a semiconductor device.Type: GrantFiled: February 2, 2004Date of Patent: September 19, 2006Assignee: Samsung Electronic Co., Ltd.Inventors: Yi Yeol Lyu, Jin Heong Yim, Ki Yong Song, Hyun Dam Jeong, Joon Sung Ryu
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Patent number: 7097781Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc?No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.Type: GrantFiled: January 22, 2003Date of Patent: August 29, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Koji Asakawa, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
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Patent number: 7090784Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc-No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.Type: GrantFiled: January 22, 2003Date of Patent: August 15, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Koji Asakawa, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
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Patent number: 7091287Abstract: The present invention relates to a nanopore-forming material for forming an insulating film for a semiconductor device, and more particularly to a nanopore-forming organic material containing a triazine functional group and preparation thereof, and a composition for forming an insulating film for a semiconductor device comprising the same, an insulating film using the same, and a manufacturing process thereof. The pore-forming material of the present invention is easy to synthesize, and the molecular weight, molecular structure, and microenvironment thereof are easy to control, and thus it is suitable for a nanopore-forming material.Type: GrantFiled: December 27, 2002Date of Patent: August 15, 2006Assignee: LG Chem, Ltd.Inventors: Won-Jong Kwon, Min-Jin Ko, Gwi-Gwon Kang, Dong-Seok Shin, Myung-Sun Moon, Jung-Won Kang, Hae-Young Nam, Young-Duk Kim, Bum-Gyu Choi
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Patent number: 7081216Abstract: Processes for the preparation of adherent polyvinylidene fluoride, hexafluoropropylene coatings on objects and for the direct production of open celled foams from a polymer latex without a need for any blowing agent.Type: GrantFiled: April 29, 2002Date of Patent: July 25, 2006Assignee: Arkema Inc.Inventors: Ramin Amin-Sanayei, Lawrence K. Wempe, Kurt Arthur Wood, Stefano Finocchiaro, Delphine Tillier
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Patent number: 7081272Abstract: A composition comprising a fluid, silica precursor (A) obtained by subjecting alkoxysilane(s) to hydrolysis/polycondensation in the presence of an acid catalyst, a basic compound (B) having a basic hydroxyl group and/or a basic nitrogen atom, wherein the pH of a 0.1 N aqueous solution of compound (B) is 11 or more, and the vapor pressure of compound (B) is 1.3 kPa or lower at 100° C., and an organic compound (C) having a boiling point of 100° C. or higher, compound (C) being compatible with silica precursor (A), wherein the amount of compound (B) is from 0.0015 to 0.5 mol, in terms of the total molar amount of the basic hydroxyl groups and the basic nitrogen atoms in compound (B), per mole of Si atoms contained in silica precursor (A).Type: GrantFiled: December 13, 2002Date of Patent: July 25, 2006Assignee: Asahi Kasei Kabushiki KaishaInventors: Yoro Sasaki, Hiroyuki Hanahata, Takaaki Ioka
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Patent number: 7078441Abstract: An organic porous material having a continuous pore structure, which comprises interconnected macropores and mesopores with a radius of 0.01 to 100 ?m in the walls of the macropores, having a total pore volume of 1 to 50 ml/g and having pore distribution curve characteristics wherein the value obtained by dividing the half-width of the pore distribution curve at the main peak by the radius at the main peak is 0.5 or less. The organic porous material is useful as an adsorbent having high physical strength and excelling in adsorption amount and adsorption speed, an ion exchanger excelling in durability against swelling and shrinkage, and a filler for chromatography exhibiting high separation capability.Type: GrantFiled: August 31, 2004Date of Patent: July 18, 2006Assignee: Organo CorporationInventors: Hiroshi Inoue, Koji Yamanaka
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Patent number: 7074335Abstract: The present invention is a method of producing porous beads, which comprises the steps of providing a first liquid phase comprising a bead matrix material and essentially edgy templating particle(s), said particle(s) being treated with a surface modifying agent; providing a second liquid phase which is immiscible with the first liquid phase; contacting the first phase and the second phase under conditions resulting in an emulsion of droplets comprised of the first liquid phase dispersed in the continuous second liquid phase; transforming the droplets to mesoporous beads by solidification of the liquid; and removing the templating particle(s) from the beads without causing any essential change of the surrounding bead, whereby hierarchical networks of pores are provided in the beads.Type: GrantFiled: December 17, 2002Date of Patent: July 11, 2006Assignee: GE Healthcare Bio-Sciences ABInventors: Hans Berg, Mats Carlsson, Anders Larsson
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Patent number: 7071125Abstract: A method including introducing a precursor in the presence of a circuit substrate, and forming a film including a reaction product of the precursor on the substrate, wherein the precursor includes a molecule comprising a primary species of the film and a modifier. A method including introducing a precursor in the presence of a circuit substrate, the precursor including a primary species and a film modifier as a single source, and forming a film on the circuit substrate. An apparatus including a semiconductor substrate, and a film on a surface of the semiconductor substrate, the film including a reaction product of a precursor including a molecule comprising a primary species and a modifier.Type: GrantFiled: September 22, 2004Date of Patent: July 4, 2006Assignee: Intel CorporationInventors: Michael L. McSwiney, Huey-Chiang Liou, Michael D. Goodner, Robert E. Leet, Robert P. Meagley
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Patent number: 7056455Abstract: The present invention comprises a novel process for the preparation of carbon based structured materials with controlled topology, morphology and functionality. The nanostructured materials are prepared by controlled carbonization, or pyrolysis, of precursors comprising phase separated copolymers. The precursor materials are selected to phase separate and self organize in bulk, in solution, in the presence of phase selective solvents, at surfaces, interfaces or during fabrication, into articles, fibers or films exhibiting well-defined, self-organized morphology or precursors of well-defined, self-organized, bi- or tri-phasic morphology. Compositional control over the (co)polymers provides control over the structure of the phase separated precursor whose organization therein dictates the nanostructure of the material obtained after carbonization or pyrolysis, wherein each dimension of the formed structure can be predetermined.Type: GrantFiled: April 6, 2002Date of Patent: June 6, 2006Assignee: Carnegie Mellon UniversityInventors: Krzysztof Matyjaszewski, Tomasz Kowalewski, David N. Lambeth, James Spanswick, Nicolay V. Tsarevsky
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Patent number: 7026364Abstract: A porous ion exchanger includes an open cell structure including interconnected macropores and mesopores whose average diameter is in a range of 1 to 1000 ?m existing on walls of the macropores. Moreover, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are uniformly distributed, and an ion exchange capacity is not less than 0.5 mg equivalent/g of dry porous ion exchanger. The porous ion exchanger can be used as an ion exchanger filled into a deionization module of an electrodeionization water purification device, solid acid catalyst, adsorbent, and filler for chromatography.Type: GrantFiled: April 3, 2002Date of Patent: April 11, 2006Assignee: Organo CorporationInventors: Hiroshi Inoue, Koji Yamanaka, Makio Tamura, Shusaku Yoshida, Hideo Nakamura
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Patent number: 6989405Abstract: Disclosed is a resinous filter for an ink-jet recording apparatus, which is obtained by a process comprising: adding common salt to a melt of a resin comprising at least one member selected from the group consisting of polyethylenes having a number-average molecular weight of from 30,000 to 80,000 and polypropylenes having a number-average molecular weight of from 50,000 to 100,000; kneading the resultant mixture to prepare a melt to be molded; molding the melt to be molded to obtain a molding; and washing the molding with water to remove the salt therefrom.Type: GrantFiled: August 8, 2002Date of Patent: January 24, 2006Assignees: Seiko Epson Corporation, Inoac CorporationInventors: Hisashi Koike, Satoshi Shinada, Michinari Tsukahara, Tomio Yokoyama, Ikuyoshi Ochiai, Hiroyuki Nishimura, Shinsuke Yamada
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Patent number: 6967222Abstract: Methods of preparing porous optical materials are provided. These methods allow for the selection of the desired pore size and level of porosity in the porous optical material. Such methods utilize a preformed polymeric porogen.Type: GrantFiled: May 24, 2002Date of Patent: November 22, 2005Assignee: Shipley Company, L.L.C.Inventors: Garo Khanarian, Yujian You, Robert H. Gore, Angelo A. Lamola
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Patent number: 6929764Abstract: Ordered, monodisperse macroporous polymers, their corresponding ordered, monodisperse colloids, and methods of preparing them are disclosed. The methods use an ordered, monodisperse colloidal template to define the polymer pore morphology, which in turn acts as a mold for the growth of a new ordered, monodisperse colloid. The macroporous polymer may be prepared with either spherical or ellipsoidal pores from a wide variety of polymeric systems. The new ordered, monodisperse colloid may be grown from a wide variety of materials including ceramics, semiconductors, metals and polymers. These materials are potentially useful in optical, micro-filtering and drug delivery applications.Type: GrantFiled: November 19, 2001Date of Patent: August 16, 2005Assignee: William Marsh Rice UniversityInventors: Peng Jiang, Vicki L. Colvin
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Patent number: 6900249Abstract: A durable, conformable, absorbent, hydrophilic, polymeric latex foam composition having a free absorbent capacity of at least 5 grams of a 0.9 weight percent aqueous saline solution per gram of foam and capable of vertically wicking said aqueous saline solution to a height of greater than about 5 cm. In a preferred embodiment, after compression, the latex foam composition remains thin until wet, whereupon it expands and exhibits a high free absorbent capacity and high vertical wicking height.Type: GrantFiled: April 14, 2003Date of Patent: May 31, 2005Assignee: Dow Global Technologies Inc.Inventors: Steven W. Mork, Andrew T. Graham
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Patent number: 6855743Abstract: Reinforced, laminated, impregnated, and materials with composite properties as cross linked polyvinyl alcohol hydrogel structures in bulk or cellular matrix forms that can take essentially any physical shape, or can have essentially any size, degree of porosity and surface texture. They have a wide range of physical properties, unusual and unique combinations of physical properties and unique responses to stress fields, which allows for their use in many end use applications.Type: GrantFiled: October 29, 2001Date of Patent: February 15, 2005Assignee: Nanosystems Research, Inc.Inventor: Nedeljko Vladimira Gvozdic
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Patent number: 6841580Abstract: An organic porous material having a continuous pore structure, which comprises interconnected macropores and mesopores with a radius of 0.01 to 100 ?m in the walls of the macropores, having a total pore volume of 1 to 50 ml/g and having pore distribution curve characteristics wherein the value obtained by dividing the half-width of the pore distribution curve at the main peak by the radius at the main peak is 0.5 or less. The organic porous material is useful as an adsorbent having high physical strength and excelling in adsorption amount and adsorption speed, an ion exchanger excelling in durability against swelling and shrinkage, and a filler for chromatography exhibiting high separation capability.Type: GrantFiled: December 3, 2002Date of Patent: January 11, 2005Assignee: Organo CorporationInventors: Hiroshi Inoue, Koji Yamanaka
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Publication number: 20040259964Abstract: A plurality of voids are introduced into a polymeric material. One or more stress sensitive components in abutment with a portion of the polymeric material are buffered from one or more stresses through employment of the portion of the polymeric material that comprises one or more voids of the plurality of voids. A movement of the portion of the polymeric material is accommodated through compression of one or more of the one or more voids.Type: ApplicationFiled: June 20, 2003Publication date: December 23, 2004Inventors: Kurt R. Carlson, Kristin C. Cooley, John P. Rahn, Manfred Schiruska
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Publication number: 20040249006Abstract: Methods and systems are disclosed for fabricating ultra-low dielectric constant porous materials. In one aspect of the invention, a method for making porous low-k films is disclosed. The method uses polymer based porogens as sacrificial templates around which a chemical vapor deposition (CVD) or plasma enhanced chemical vapor deposition (PECVD) deposited matrix is formed. Upon pyrolysis, the porogens decompose resulting in a porous ultra-low dielectric material. This method can be used, for example, to produce porous organosilicate glass (OSG) materials, ultra-low dielectric nanoporous materials, porous ceramics, porous scaffolds, and/or porous metals. Various uses and embodiments of the methods and systems of this invention are disclosed.Type: ApplicationFiled: July 22, 2003Publication date: December 9, 2004Inventors: Karen K. Gleason, Qingguo Wu, April Ross
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Patent number: 6818673Abstract: A method of producing silicone foam includes the step of adding a mechanical foaming agent to uncured silicone. The mechanical foaming agent is a plurality of solid bodies insoluble in the silicone. The method also includes the steps of curing the silicone and removing the mechanical foaming agent as intact solid bodies from the silicone thereby providing a silicone foam.Type: GrantFiled: December 9, 2003Date of Patent: November 16, 2004Assignee: Radiant Holdings, LLCInventor: Terrell W. Ferguson
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Publication number: 20040224021Abstract: The present invention features a method for the formation of superporous hydrogels using an ion-equilibration technique. Anionic polysaccharides are included in the hydrogel reaction mixture and cations are introduced either during or after hydrogel formation. Properties of the resulting hydrogel can be subsequently adjusted by treating the cation-complexed gel with a different cation or cation mixture under equilibrating conditions. It has been found that by properly adjusting the cations and the sequence in which they are used in the equilibration process, superporous hydrogels can be formed that are highly absorbent while maintaining favorable structural properties, including strength, ruggedness, and resiliency. It has also been found that applying appropriate dehydration conditions to them after their formation can further stabilize the superporous hydrogels formed by the method of the invention.Type: ApplicationFiled: April 20, 2004Publication date: November 11, 2004Inventors: Hossein Omidian, Jose Gutierrez-Rocca
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Patent number: 6797738Abstract: The invention is directed to a process for preparing porous polymer materials by a combination of gas foaming and particulate leaching steps. The invention is also directed to porous polymer material prepared by the process, particularly having a characteristic interconnected pore structure, and to methods for using such porous polymer material, particularly for tissue engineering.Type: GrantFiled: August 28, 2001Date of Patent: September 28, 2004Assignee: The Regents of the University of MichiganInventors: Leatrese Harris, David J. Mooney, Lonnie Shea
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Publication number: 20040186191Abstract: An organic aerogel or xerogel formed by a sol-gel reaction using starting materials that exhibit similar reactivity to the most commonly used resorcinol starting material. The new starting materials, including thio-, amine- and nitro-containing molecules and functionalized macrocyclic molecules will produce organic xerogels and aerogels that have improved performance in the areas of detection and sensor technology, as well as water stream remediation. Also, further functionalization of these new organic aerogels or xerogels will yield material that can be extracted with greater facility than current organic aerogels.Type: ApplicationFiled: March 18, 2003Publication date: September 23, 2004Applicant: The Regents of the University of CaliforniaInventors: Glenn A. Fox, Thomas M. Tillotson
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Publication number: 20040176488Abstract: In accordance with the present invention, compositions and methods are provided in which the mechanical strength and durability of a precursor material having a plurality of pores is increased by a) providing a precursor material; b) treating the precursor material to form a nanoporous aerogel, preferably by using a supercritical drying process; c) providing a blending material having a reinforcing component and a volatile component; d) combining the nanoporous aerogel and the blending material to form an amalgamation layer; and e) treating the amalgamation layer to increase the mechanical strength of the layer by a substantial amount, and to ultimately form a low dielectric material that can be utilized in various applications.Type: ApplicationFiled: March 13, 2003Publication date: September 9, 2004Inventors: Shyama Mukherjee, Roger Leung, Kreisler Lau
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Publication number: 20040167238Abstract: A method of producing silicone foam includes the step of adding a mechanical foaming agent to uncured silicone. The mechanical foaming agent is a plurality of solid bodies insoluble in the silicone. The method also includes the steps of curing the silicone and removing the mechanical foaming agent as intact solid bodies from the silicone thereby providing a silicone foam.Type: ApplicationFiled: December 9, 2003Publication date: August 26, 2004Inventor: Terrell W Ferguson
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Patent number: 6780499Abstract: A porous, low-k dielectric film that has good mechanical properties as well as a method of fabricating the film and the use of the film as a dielectric layer between metal wiring features are provided. The porous, low-k dielectric film includes a first phase of monodispersed pores having a diameter of from about 1 to about 10 nm that are substantially uniformly spaced apart and are essentially located on sites of a three-dimensional periodic lattice; and a second phase which is solid surrounding the first phase. Specifically, the second phase of the film includes (i) an ordered element that is composed of nanoparticles having a diameter of from about 1 to about 10 nm that are substantially uniformly spaced apart and are essentially arranged on sites of a three-dimensional periodic lattice, and (ii) a disordered element comprised of a dielectric material having a dielectric constant of about 2.8 or less.Type: GrantFiled: May 3, 2001Date of Patent: August 24, 2004Assignee: International Business Machines CorporationInventors: Stephen McConnell Gates, Christopher B. Murray, Satyanarayana V. Nitta, Sampath Purushothaman
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Patent number: 6765028Abstract: A method of preparing a porous fiber, the method including blending a natural polymer having a thermal stability with a synthetic polymer having a thermal stability, wherein the thermal stability of the natural polymer is different from the thermal stability of the synthetic polymer, and wherein the natural polymer and synthetic polymer from immiscible phases; extruding the blended polymers while heating at a predetermined heating rate to the fiber spinning temperature; spinning the fibers while maintaining the temperature; and heating the fibers at a heating rate that maintains the natural polymer in a fiber form and that removes the synthetic polymer, whereby a porous fiber is formed.Type: GrantFiled: December 16, 2002Date of Patent: July 20, 2004Assignee: North Carolina State UniversityInventors: John F. Kadla, Richard D. Gilbert, Richard A. Venditti, Satoshi Kubo
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Methods of forming polymeric structures using carbon dioxide and polymeric structures formed therapy
Patent number: 6765030Abstract: Methods of forming a polymeric structure having a plurality of cells therein that include contacting a polymeric material that includes a first phase and a second phase with a composition comprising carbon dioxide to form the polymeric structure having a plurality of cells therein are described. Polymeric materials and microelectronic devices formed by such methods are also described.Type: GrantFiled: March 28, 2002Date of Patent: July 20, 2004Assignee: The University of North Carolina at Chapel HillInventors: Joseph M. DeSimone, Sara Naomi Paisner -
Publication number: 20040054021Abstract: A method of making a foamed material comprises heating a mixture which includes a polymer, especially a polyaryletherketone polymer, and a decomposable material, especially magnesium hydroxide or aluminium hydroxide/hydrated alumina, to a foaming temperature at or above the decomposition temperature of the decomposable material. In the method, the decomposable material decomposes to produce water which produces foaming within the polymeric material.Type: ApplicationFiled: July 11, 2003Publication date: March 18, 2004Inventor: Kenneth Malcolm Seargeant
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Patent number: 6702965Abstract: A process for the preparation of a porous composite product. The process steps are forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and one or more fillers, in particular with a high specific surface; extruding the mixture to form an extruded precursor product; removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores, and recovering the porous composite product.Type: GrantFiled: September 20, 2001Date of Patent: March 9, 2004Assignee: BolloreInventors: Jean-François Penneau, François Capitaine, Philippe Le Goff
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Patent number: 6673847Abstract: The present invention relates to a method of removing water immiscible porogens from macroreticular copolymers comprising distilling said porogen in water soluble organic solvent.Type: GrantFiled: April 1, 2002Date of Patent: January 6, 2004Assignee: Rohm and Haas CompanyInventor: Biwang Jiang
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Patent number: 6670404Abstract: This relates variously to techniques for comminuting polymeric foams, to techniques for preparing polymeric foams containing that comminuted foam, and to the resulting comminuted foam powder and polymeric foams. The procedures may be used on foams containing production contaminants such as polyolefins, paper, and foam skins and on other foams containing consumer contaminants such as wood, metal, leather, etc. The comminuted foam powder, with or without contaminants, preferably is screened or sifted to obtain a foam powder having a particle size of about 2 mm or less.Type: GrantFiled: December 21, 2000Date of Patent: December 30, 2003Assignee: Mobius Technologies, Inc.Inventors: Bryan Martel, Robert Villwock, Herman Stone
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Patent number: 6660176Abstract: Small particles of polymeric material are produced by expansion of a mixture of monomers and a propellant. The size and shape of the particles can be precisely tailored by materials selection and expansion conditions. Particles of 10 nanometers to 100 microns can be produced. If monomers exhibiting solid state reactivity are utilized, the particles thus formed can be polymerized at any time after formation. The particles produced by this method can be molecularly imprinted by incorporating a template into the particle prior to fully curing the particle, in a manner which allows selective extraction of the template from the cured particle after formation without deformation of the imprint site. A two step polymerization process allows the particles to be deposited on and adhered to a wide variety of substrates without additional agents.Type: GrantFiled: January 24, 2002Date of Patent: December 9, 2003Assignee: Virginia Commonwealth UniversityInventors: Gary Tepper, Dmitry Pestov, Natalia Levit, Gary Wnek
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Patent number: 6632849Abstract: A porous carbonized film with fine continuous pores, obtained by carbonization of a highly heat-resistant resin porous film in an anaerobic atmosphere, and a process for its production.Type: GrantFiled: May 25, 2000Date of Patent: October 14, 2003Assignee: UBE Industries, Ltd.Inventors: Shigeru Yao, Shyusei Ohya, Yukihiko Asano
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Patent number: 6627670Abstract: A durable, conformable, absorbent, hydrophilic, polymeric latex foam composition having a free absorbent capacity of at least 5 grams of a 0.9 weight percent aqueous saline solution per gram of foam and capable of vertically wicking said aqueous saline solution to a height of greater than about 5 cm. In a preferred embodiment, after compression, the latex foam composition remains thin until wet, whereupon it expands and exhibits a high free absorbent capacity and high vertical wicking height.Type: GrantFiled: April 9, 2001Date of Patent: September 30, 2003Assignee: Dow Global Technologies Inc.Inventors: Steven M. Mork, Andrew T. Graham
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Patent number: 6608117Abstract: What is disclosed herein are physically cross-linked, cellular hydrogels and methods for their preparation. The cellular materials are highly resilient, hydrophilic materials having broad uses. The cellular materials are prepared by the physical crosslinking of frothed polymers and providing materials that have cellular pores provided by the use of removable materials during the formation of the cellular materials.Type: GrantFiled: May 11, 2001Date of Patent: August 19, 2003Assignee: Nanosystems Research Inc.Inventor: Nedeljko Vladimira Gvozdic
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Patent number: 6583187Abstract: Systems, apparatus combinations and methods for producing a coating powder are provided wherein a stream of a powder coating precursor including at least one resin and at least one additional powder coating ingredient is contacted with a process fluid effective to reduce the viscosity of the powder coating precursor to allow processing of the powder coating precursor at a lower temperature.Type: GrantFiled: January 21, 2000Date of Patent: June 24, 2003Inventors: Andrew T. Daly, Owen H. Decker, Karl R. Wursthorn, Frank R. Houda, Leo T. Grundowski, Carl W. Ernst
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Patent number: 6565763Abstract: A pattern forming material contains a block copolymer or graft copolymer and forms a structure having micro polymer phases, in which, with respect to at least two polymer chains among polymer chains constituting the block copolymer or graft copolymer, the ratio between N/(Nc−No) values of monomer units constituting respective polymer chains is 1.4 or more, where N represents total number of atoms in the monomer unit, Nc represents the number of carbon atoms in the monomer unit, No represents the number of oxygen atoms in the monomer unit.Type: GrantFiled: June 7, 2000Date of Patent: May 20, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Koji Asakawa, Toshiro Hiraoka, Yoshihiro Akasaka, Yasuyuki Hotta
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Patent number: 6562449Abstract: A nanoporous polymer comprises hollow structures fabricated from crosslinked polymeric strands. The hollow structures are further coupled to other crosslinked polymeric strands by a covalent bond. Particularly contemplated nanoporous polymers have a Tg of no less than 400° C. and a dielectric constant k of no more than 2.5.Type: GrantFiled: February 22, 2001Date of Patent: May 13, 2003Inventor: Jim Drage
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Publication number: 20030022953Abstract: Disclosed are organo polysilica dielectric materials having low dielectric constants useful in electronic component manufacture are disclosed along with methods of preparing the porous organo polysilica dielectric materials. Also disclosed are methods of forming electronic devices containing such porous organo polysilica dielectric materials without the use of antiretlective coatings.Type: ApplicationFiled: July 11, 2002Publication date: January 30, 2003Applicant: Shipley Company, L.L.C.Inventors: Anthony Zampini, Michael K. Gallagher
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Patent number: 6500401Abstract: A method of making carbon foam is described which involves pyrolizing a mixture containing at least one pyrolizable substance and at least one unpyrolizable material and then removing the unpyrolizable material to obtain the carbon foam. Carbon foam made by this process is also described. Incorporating the carbon foam in a variety of end use applications including electrodes, thermal insulation material, polymers, and the like is also described.Type: GrantFiled: March 13, 2001Date of Patent: December 31, 2002Assignee: Cabot CorporationInventors: Steven R. Reznek, Robert K. Massey
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Patent number: 6486240Abstract: An asymmetric support membrane can be prepared by using a phase separation method. The method includes immersing a polymer solvent solution into water. The polymer solution is made by dissolving 15 to 35% by weight of the polymer into a solvent that lets the polymer solution become a gel at a temperature of 0 to 50° C. The solution is then allowed to gel and brought into a final membrane form in water for phase separation and formation of the asymmetric support membrane. The polymer may be poly(vinyl chloride), polyethersulfone, polyetherimide and polyamic(methylester). The solvent is &ggr;-butyrolactone alone as a major solvent or is a mixed solvent with N-methyl-2-pyrrolidone as a cosolvent. The asymmetric support membrane is a porous support membrane of a sponge form having open pores that are connected to one another with a narrow pore size distribution. Thus, the asymmetric support membrane has an improved permeance and mechanical strength.Type: GrantFiled: October 28, 1999Date of Patent: November 26, 2002Assignee: Korea Institute of Science and TechnologyInventors: Jong Ok Won, Yong Soo Kang, Hyun Chae Park, Un Young Kim, Seong Hyun Yoo
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Patent number: 6465532Abstract: The present invention includes a composition having a co-continuous interconnecting channel morphology for controlled gas transmission rate. These co-continuous interconnecting channels are predominately occupied with a polymer and particles that control the percolation through the composition. The polymer composition may be used to form a desired shaped article such as plug type inserts and liners for closed containers, or it may be formed into a film, sheet, bead or pellet.Type: GrantFiled: July 28, 2000Date of Patent: October 15, 2002Assignee: CSP Tecnologies, Inc.Inventor: Ihab M. Hekal
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Patent number: 6451348Abstract: A method of manufacturing a porous matrix-type drug delivery system is provided. It comprises the steps of: dispersing, stirring, and emulsifying an aqueous solution of a drug in an organic solvent having a polymer compound and a surface active agent solved therein; thereafter forming it into a desirable matrix shape; lyophilizing or drying it at a low temperature or room temperature until the matrix surface is hardened; and drying it again in order to remove the water and the organic solvent.Type: GrantFiled: January 3, 2000Date of Patent: September 17, 2002Assignee: Korea Institute of Science and TechnologyInventors: Seo Young Jeong, Kuiwon Choi, Ick-Chan Kwon, Yong-Hee Kim, Jae Bong Choi, Kyu Back Lee
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Patent number: 6441055Abstract: The invention relates to sensor membranes for determining oxygen concentrations and to a process for the preparation thereof, in which, in a polymer matrix which is permeable to oxygen, an indicator is present whose optical and physicochemical properties can be influenced by the respective analytes. Starting from the disadvantages of known sensor membranes, it is the object of the invention to provide a sensor membrane which is thermally and also dimensionally stable, and can be prepared simply and flexibly. This object is achieved according to the invention in that the polymer matrix which contains the optical oxygen indicator is formed from a polymer containing sulfur, preferably in the main chain, particularly preferably containing sulfide and/or sulfone functionalities in the main chain.Type: GrantFiled: February 23, 2001Date of Patent: August 27, 2002Assignee: Institut fur Chemo-und Biosensorik Munster e.V.Inventors: Andreas Katerkamp, Maria Hiegemann, Erk Gedig
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Publication number: 20020115735Abstract: A nanoporous polymer comprises hollow structures fabricated from crosslinked polymeric strands. The hollow structures are further coupled to other crosslinked polymeric strands by a covalent bond. Particularly contemplated nanoporous polymers have a Tg of no less than 400° C. and a dielectric constant k of no more than 2.5.Type: ApplicationFiled: February 22, 2001Publication date: August 22, 2002Applicant: Honeywell International Inc.Inventor: Jim Drage
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Patent number: 6436426Abstract: The present invention provides a process for producing porous polymer materials. In the present invention, a polymer material and a soluble material are mixed in their solid states. The surface of the polymer material is partially dissolved and fused by introducing a solvent. The present invention makes use of a pressure difference while introducing a non-solvent into the polymer material to solidify and resolve the solved polymer material. Then, a substantial amount of water is used to wash the inside soluble material out. Therefore, the porous polymer materials with high porosity and interconnecting pores inside the materials are produced massively and rapidly.Type: GrantFiled: May 30, 2001Date of Patent: August 20, 2002Assignee: Industrial Technology Research InstituteInventors: Chun-Jen Liao, Chin-Fu Chen, Jui-Hsiang Chen, Ken-Yuan Chang, Yure-Ru Lin, Shu-Fang Chiang