Synthetic Resin Patents (Class 252/62.54)
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Patent number: 8105493Abstract: It is intended to provide a method capable of simply aggregating magnetic particles having a surface modified with a thermoresponsive polymer at a given temperature without heating or cooling an aqueous solution containing the magnetic particles, and a separation method and a detection method of a substance to be detected in a sample using the method. The method of separating a substance to be detected from a sample includes the steps of: mixing an adsorbent and the sample in an aqueous solution to adsorb the substance to be detected on the adsorbent, aggregating the adsorbent by changing a salt concentration in the aqueous solution; and collecting the adsorbent from the aqueous solution by a magnetic force, wherein said adsorbent comprises a magnetic particle of an average particle size of 50 to 1000 nm, a surface of which is modified with a thermoresponsive polymer and is immobilized with a substance having an affinity for the substance to be detected.Type: GrantFiled: June 26, 2008Date of Patent: January 31, 2012Assignee: JNC CorporationInventors: Yuki Takahashi, Noriyuki Ohnishi, Xiaomao Xie
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Publication number: 20120015190Abstract: A composite nanoparticle comprising a nanoparticle confined within a cross-linked collapsed polyelectrolyte polymer wherein the nanoparticle comprises a charged organic ion.Type: ApplicationFiled: June 17, 2011Publication date: January 19, 2012Applicant: VIVE NANO, INC.Inventors: Cynthia M. Goh, Jose Amado Dinglasan, Jane B. Goh, Richard Loo, Darren Anderson
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Publication number: 20120012777Abstract: A powder for dust core including a soft magnetic metal powder and a silicon impregnated layer made of silicon concentrated in a surface layer of the soft magnetic metal powder, in which a silicon dioxide powder is diffusion-bonded to a surface of the silicon impregnated layer to form a diffusion-bonded part while a part of the silicon dioxide powder is impregnated and diffused in the silicon impregnated layer and the other part of the same protrudes from the surface of the silicon impregnated layer. The diffusion-bonded part creates a gap with respect to another powder for dust core, thereby providing increased specific resistance.Type: ApplicationFiled: September 21, 2010Publication date: January 19, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaki Sugiyama, Toshiya Yamaguchi, Shota Ohira, Takeshi Hattori, Yusuke Oishi
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Publication number: 20120000833Abstract: The present invention relates to the use of ferromagnetic materials to improve the recyclability of plastic packaging.Type: ApplicationFiled: July 1, 2010Publication date: January 5, 2012Applicant: EASTMAN CHEMICAL COMPANYInventors: Marcus David Shelby, Freddie Wayne Williams, Rondell Paul Little, JR.
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Publication number: 20120001710Abstract: The invention can provide a dust core that can counteract a large electric current, achieve an increase in frequency and miniaturization, and achieve an improvement in voltage resistance, and a magnetic element using the same. The dust core of the invention is a dust core including metallic magnetic powder, an inorganic insulating material, and a thermosetting resin, in which the metallic magnetic powder has a Vickers hardness (Hv) in a range of 230?Hv?1000, the inorganic insulating material has a compressive strength of 10000 kg/cm2 or lower and is in a mechanical collapse state, and the inorganic insulating material in a mechanical collapse state and the thermosetting resin are interposed between the metallic magnetic powder particles.Type: ApplicationFiled: January 14, 2010Publication date: January 5, 2012Inventors: Yuya Wakabayashi, Takeshi Takahashi, Nobuya Matsutani
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Publication number: 20120001115Abstract: A magnetic reagent contains magnetic microparticles and a compound of the formula (I) as defined herein. The magnetic reagent may be used in a magnetic separation process for the removal of impurities from mineral substrates.Type: ApplicationFiled: September 8, 2011Publication date: January 5, 2012Applicant: CYTEC TECHNOLOGY CORP.Inventors: Sathanjheri A. RAVISHANKAR, Abdul K. GORKEN
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Publication number: 20110315913Abstract: The present invention relates to surface-treated rare earth-based magnetic particles comprising rare-earth-based magnetic particles, a first coating layer comprising a phosphoric acid compound which is formed on a surface of the respective magnetic particles and a second coating layer in the form of a composite coating film comprising a silicon compound and a phosphoric acid compound which is formed on a surface of the first coating layer, wherein an amount of Fe eluted from the rare earth-based magnetic particles is not more than 10 mg/L; a resin composition for bonded magnets comprising the above surface-treated rare earth-based magnetic particles and a resin; and a bonded magnet comprising the above surface-treated rare earth-based magnetic particles.Type: ApplicationFiled: February 3, 2010Publication date: December 29, 2011Inventors: Kuniyoshi Shigeoka, Nobuhiro Katayama
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Patent number: 8075794Abstract: Provided is a magnetic graphite nanoplatelet, and a method of manufacturing nanocomposites by introducing the magnetic nanoplatelets into a composite matrix. Expanded crystalline graphite, in the form of graphite nanoplatelets, is mixed with magnetic particles to adhere the particles to the nanoplatelets. The magnetic graphite nanoplatelets are combined with a composite matrix, typically a polymer, to form a nanocomposite. In the presence of an applied magnetic field, the magnetic graphite nanoplatelets orient and align consistent with the magnetic field to yield a composite having enhance mechanical, electrical and thermal properties.Type: GrantFiled: July 1, 2008Date of Patent: December 13, 2011Assignee: Teledyne Scientific & Imaging, LLCInventors: Rahul Ganguli, Julia J. Mack, Vivek Mehrotra
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Publication number: 20110300388Abstract: Provided are a functional molded article having sufficient flexibility and moldability and also sufficiently having the function of a functional particle, and a method for producing the same. The functional molded article is formed by molding a mixture containing a functional particle, a binder, and a fibrous substance.Type: ApplicationFiled: February 15, 2010Publication date: December 8, 2011Applicant: NIPPON VALQUA INDUSTRIES, LTD.Inventor: Tomoaki Yokota
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Patent number: 8070974Abstract: The invention relates to a soft-magnetic material comprising a micro fraction composed of particles of a soft-magnetic material having a particle size in the range from 1 to 100 ?m and a nano fraction composed of particles of a soft-magnetic material having a particle size in the range from 100 to 200 nm, where the proportion of the nano fraction based on the total mass of micro fraction and nano fraction is from 5 to 70% by mass and the particles of the micro fraction and the particles of the nano fraction optionally consist of the same material, and also a process for producing an article composed of the soft-magnetic material.Type: GrantFiled: June 5, 2009Date of Patent: December 6, 2011Assignee: Tridelta Weichferrite GmbHInventors: Silvio Gablenz, Marko Kloucek
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Publication number: 20110291032Abstract: An electromagnetic shielding composition includes a carrier, a plurality of metal nanowires, and a plurality of nanoparticles. The plurality of metal nanowires are dispersed within the carrier and are in an amount of from 1 to 95 percent by weight of the electromagnetic shielding composition. The plurality of nanoparticles are dispersed within the carrier and are in an amount of from 0.5 to 60 percent by weight of the electromagnetic shielding composition.Type: ApplicationFiled: May 27, 2011Publication date: December 1, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Wen Hsien SUN, Kao Der Chang, Ming Jyh Chang, Yu Ming Wang, Chuen Shyong Chou
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Light-polarizing solid coating composition, optical lens comprising same, and method for making same
Patent number: 8062542Abstract: The light-polarizing solid coating composition which comprises (i) particles of at least one magnetic material suspended in a solvent, is characterized in that it comprises (ii) at least one dichroic dye compound. Application to ophthalmic optics.Type: GrantFiled: September 30, 2005Date of Patent: November 22, 2011Assignee: Essilor International Compagnie Generale d'OptiqueInventors: John Biteau, Myriam Fanayar -
Publication number: 20110272537Abstract: Retention of position and clamping of components is ideally performed with an engagement arrangement which is reconfigurable. Magnetorheological (MR) fluids have been utilised for reconfigurable engagement arrangements but typically require powerful electromagnets to activate the MR fluid. By providing enclosed chambers with a constriction in the form of a passage between a reservoir portion of the chamber and an engagement portion of the chamber it is possible to utilise smaller permanent magnets acting upon a smaller volume of MR fluid in the passage. In such circumstances initial positioning of engagement elements is provided through forced displacement in the form of a plunger or pin and then retention of the engagement element position achieved through positioning a magnetic field across and about a passage to create an effective block retaining MR fluid volume and therefore presentation of the engagement element.Type: ApplicationFiled: April 2, 2009Publication date: November 10, 2011Inventors: Nabil Gindy, Amir Fahmi, Yan Wang, Venkata S. Kancharla, Kevin Walker
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Publication number: 20110266492Abstract: Stimuli-responsive magnetic nanoparticles, methods of making the nanoparticles, and methods of using the nanoparticles.Type: ApplicationFiled: June 15, 2011Publication date: November 3, 2011Applicant: UNIVERSITY OF WASHINGTONInventors: Patrick S. Stayton, Allan S. Hoffman, Jr-iuan Lai, John Hoffman, Mitsuhiro Ebara
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Patent number: 8029626Abstract: A method for producing a soft magnetic powdered core comprises a mixing step for forming a raw powder by adding a thermoplastic resin powder to a soft magnetic powder and mixing them, a compacting step for forming a compact by compacting the raw powder into a predetermined shape, a melting and setting step for the resin in which the resin of the compact is melted by heating to at least the melting point of the thermoplastic resin and the melted resin is set by cooling to a room temperature, and a crystallizing step for the resin in which the set resin is heated to not less than the exothermic onset temperature and not more than the endothermic onset temperature, which are measured by DSC analysis of the thermoplastic resin, and is cooled to a room temperature.Type: GrantFiled: March 17, 2008Date of Patent: October 4, 2011Assignees: Hitachi Powered Metals Co., Ltd., Denso CorporationInventors: Chio Ishihara, Kazuo Asaka, Kohei Muramatsu, Tsuyoshi Akao, Hirotake Hamamatsu
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Publication number: 20110233452Abstract: The present invention relates to a graphene composition having liquid crystalline properties and a preparation method thereof, and more particularly to a graphene composition wherein graphene having useful electrical properties is uniformly dispersed in a medium, whereby it is chemically and physically stable, exhibits a liquid crystal phase in a wide temperature range and has good compatibility with other compounds, and to a preparation method thereof. In the graphene composition, liquid crystalline properties are imparted to graphene, which can be produced in large amounts and has excellent mechanical, chemical and electrical properties, and thus the graphene composition can provide a chance to apply functional carbon materials in various fields, including nanocomposites, energy storage materials, and photonics.Type: ApplicationFiled: December 22, 2010Publication date: September 29, 2011Inventors: Sang Ouk KIM, Ji Eun Kim, Tae Hee Han, Sun Hwa Lee, Ju Young Kim
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Publication number: 20110233811Abstract: The invention relates to a composition for producing magnetic or magnetizable moldings, comprising from 95.5 to 98.95% by weight of a powder made of a magnetic or magnetizable material, from 1.0 to 4% by weight of a mixture made of at least one epoxy-novolak resin, and also of at least one hardener, and comprising from 0.05 to 0.5% by weight of at least one additive, based in each case on the total weight of the composition. The mixture made of the at least one epoxy-novolak resin and of the at least one hardener comprises from 85 to 95% by weight of the epoxy-novolak resin and from 5 to 15% by weight of hardener. The hardener has been selected from (cyclo)aliphatic amines and their adducts, polyamides, Mannich bases, amidoamines, phenolic resins, imidazoles, and imidazole derivatives, dicyandiamide, and BF3-monoethanolamine. The invention further relates to a process for producing the composition, and also to a process for producing a molding made of the composition.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Applicant: BASF SEInventors: Carsten Blettner, Jürgen Kaczun, Ria Kress, Dag Wiebelhaus
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Publication number: 20110233454Abstract: Organic polymer particles having a structure shown by the following formula (1) are disclosed. wherein A represents an alkylidene group, an alkylene group, a cyclohexylene group, or a phenylene group, and B represents a linear or branched alkylene group or an alkylidene group having 1 to 6 carbon atoms.Type: ApplicationFiled: June 3, 2011Publication date: September 29, 2011Applicant: JSR CORPORATIONInventors: Kouji TAMORI, Eiji TAKAMOTO, Takahiro KAWAI
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Publication number: 20110233453Abstract: It is intended to provide an aqueous solution of a thermoresponsive polymer, which shows an upper critical solution temperature (UCST) and is capable of maintaining a dissolved state, even if it is stored for a long period of time at a temperature at which a ligand such as an antibody or an antigen is not inactivated. A UCST lowering agent is incorporated in a predetermined amount in an aqueous solution of a thermoresponsive polymer which shows a UCST in a state of containing water, thereby lowering the UCST of the aqueous solution to less than the storage temperature, and the resulting aqueous solution is stored.Type: ApplicationFiled: May 31, 2011Publication date: September 29, 2011Applicant: CHISSO CORPORATIONInventors: MASARU EGUCHI, NORIYUKI OHNISHI
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Patent number: 8025756Abstract: The invention relates to a method of bonding different materials of construction using hybrid materials comprising nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders enveloped or in part not enveloped by poly(meth)acrylates, and to their use.Type: GrantFiled: November 21, 2006Date of Patent: September 27, 2011Assignee: Evonik Degussa GmbHInventors: Sebastian Roos, Gerd Loehden, Jan Hendrik Schattka, Manfred Braum, Markus Pridoehl, Guido Zimmermann, Andreas Huether
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Patent number: 8017031Abstract: This invention is concerned with biocompatible magnetic nanocrystals highly soluble and dispersible in a physiological buffer, powder of biocompatible magnetic nanocrystals and nanocrystals bearing surface reactive N-hydroxysuccinimide ester moiety, and preparations thereof. The magnetic nanocrystals in powder form are highly soluble in a physiological buffer. The resultant aqueous colloidal solution presents long term stability in ambient conditions. Moreover, the carboxyl group on the surface of the magnetic nanocrystals can be converted to N-hydroxysuccinimide ester moiety in an organic solvent. The resultant powder of the magnetic nanocrystals carrying surface N-hydroxysuccinimide ester moiety is soluble and dispersible in an aqueous solution. Different types of biomolecules bearing amino group can covalently be attached to the magnetic nanocrystal simply by mixing them in aqueous solutions.Type: GrantFiled: January 14, 2008Date of Patent: September 13, 2011Assignee: Institute of Chemistry, Chinese Academy of SciencesInventors: Mingyuan Gao, Fengqin Hu, Shujie Liu, Xianyong Lu
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Publication number: 20110217456Abstract: Disclosed is a magnetic catalyst formed by a single or multiple nano metal shells wrapping a carrier, wherein at least one of the metal shells is iron, cobalt, or nickel. The magnetic catalyst with high catalyst efficiency can be applied in a hydrogen supply device, and the device can be connected to a fuel cell. Because the magnetic catalyst can be recycled by a magnet after generating hydrogen, the practicability of the noble metals such as Ru with high catalyst efficiency is dramatically enhanced.Type: ApplicationFiled: May 13, 2011Publication date: September 8, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chan-Li HSUEH, Cheng-Hong LIU, Jie-Ren KU, Ya-Yi HSU, Cheng-Yen CHEN, Reiko OHARA, Shing-Fen TSAI, Chien-Chang HUNG, Ming-Shan JENG
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Publication number: 20110201241Abstract: The invention relates to embodiments of a new composite material comprising at least a first plastic material and particles of magnetizable, magnetized or metal material. The invention further concerns an article made of the composite material and a method for obtaining an article from the composite material.Type: ApplicationFiled: October 7, 2009Publication date: August 18, 2011Applicant: P.R. NASTRI TRASPORTATORI S.N.C. DI RUBINO VINCENZ O & RUBINO ATTILIOInventor: Attilio Rubino
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Publication number: 20110186771Abstract: A composite materil comprises magnetic particles dispersed in electrically insulating material. The magnetic particles have an aspect ratio greater than 1 (preferably greater than 10) and a concentration sufficiently high to produce negative permeability. The magnetic particles may be magnetic flakes of reduced carbonyl iron of average diameter 50 ?m, average thickness 1 ?m and aspect ratio 50, the magnetic flakes being at least 25% by volume of the composite material. The magnetic flakes may be aligned to produce enhanced permeability. The electrically insulating material may be paraffin wax, particulate PTFE, or another polymer. To control permittivity, the composite material may include an electrically conducting component such as graphite or conductive coatings upon the magnetic flakes.Type: ApplicationFiled: August 15, 2008Publication date: August 4, 2011Inventors: Shahaid Hussain, Philip Mark Shryane Roberts, Peter Allen Hobson
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Patent number: 7981310Abstract: A magnetic paint is prepared by a method comprising a surface-treating step for magnetic powder, to obtain a first composition by mixing and stirring a composition which comprises a magnetic powder, a dispersant and/or a binder resin, and an organic solvent, and which contains 40% by weight or less of a non-solvent component, while applying a shear force to the composition; and a concentrating step to obtain a second composition by concentrating the first composition until the content of the non-solvent components of the first composition reaches 80% by weight or more.Type: GrantFiled: March 6, 2008Date of Patent: July 19, 2011Assignee: Hitachi Maxell, Ltd.Inventors: Kazuhiko Nakiri, Sadamu Kuse, Hiroyuki Mitsuhashi
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Patent number: 7976720Abstract: The present invention provides a composite magnetic sheet having a high magnetic permeability, to be produced easily at a low cost. The composite magnetic sheet includes magnetic substance powders and polytetrafluoroethylene powders.Type: GrantFiled: February 8, 2007Date of Patent: July 12, 2011Assignee: Sumida CorporationInventor: Shinichi Sakamoto
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Publication number: 20110155944Abstract: An aromatic ring-containing compound for a resist underlayer and a resist underlayer composition, the aromatic ring-containing compound being represented by the following Chemical Formula 1: wherein, in Chemical Formula 1, R1 to R6 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C5 to C20 aromatic ring group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heteroaryl group, or a substituted or unsubstituted C2 to C20 heterocycloalkyl group, X1 to X6 are each independently hydrogen, a hydroxy group (—OH), a substituted or unsubstituted alkyl amine group, a substituted or unsubstituted alkoxy group, or an amino group (—NH2), n1 to n6 are each independently 0 or 1, and 1?n1+n2+n3+n4+n5+n6?6.Type: ApplicationFiled: December 29, 2010Publication date: June 30, 2011Inventors: Sung-Wook Cho, Hwan-Sung Cheon, Min-Soo Kim, Seung-Bae Oh, Jee-Yun Song
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Publication number: 20110156850Abstract: A powder for a powder magnetic core, a powder magnetic core, and methods of producing those products are provided, so that mechanical strength of a powder magnetic core can be enhanced by hydrosilylation reaction between vinylsilane and hydrosilane without degrading magnetic properties. The powder for a powder magnetic core is composed of magnetic particles 2 having a surface 21 coated with an insulating layer 3, wherein the insulating layer 3 includes a polymer resin insulating layer 33 comprising vinylsilane 4 and hydrosilane.Type: ApplicationFiled: September 2, 2009Publication date: June 30, 2011Inventors: Daisuke Okamoto, Daisuke Ichigozaki, Shine Tajima, Masaaki Tani
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Publication number: 20110155945Abstract: A polymer foam layer is disclosed, comprising a polymer foam and a plurality of electrically conductive particles dispersed within the polymer foam, polymer foam layer having an unabraded first surface and an opposite, second surface, wherein the electrically conductive particles essentially continuously span the polymer foam layer, and a portion of the electrically conductive particles are exposed at the first surface of the layer and another portion of the electrically conductive particles are exposed at the second surface. The foams are useful as gaskets for electromagnetic shielding, grounding pads, battery contact conductive spring elements, and the like.Type: ApplicationFiled: December 28, 2010Publication date: June 30, 2011Applicant: ROGERS CORPORATIONInventor: Sharon Y. Soong
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Publication number: 20110155947Abstract: A magnetic fine particle comprising a composite of an iron oxide and polyalkyleneimine, wherein a surface of the magnetic fine particle is modified with a temperature-responsive high molecular weight compound, is prepared.Type: ApplicationFiled: September 3, 2009Publication date: June 30, 2011Applicant: CHISSO CORPORATIONInventor: Masaru Eguchi
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Publication number: 20110155946Abstract: A method of manufacturing a polymer foam composite is described, the method comprising forming an article having a first surface and an opposite second surface from a precursor composition, the precursor composition comprising a polymer foam precursor composition, and a filler composition comprising a plurality of magnetic, electrically conductive particles; foaming the precursor composition to form a plurality of cells in precursor composition; applying a magnetic field to the foamed precursor composition, wherein the magnetic field is of a strength and applied for a time effective to align the electrically conductive, magnetic particles into mutually isolated chains between the first surface and the opposite second surface of the article; and solidifying the polymer foam precursor composition to provide a polymer foam composite having a density of about 1 to about 125 pounds per cubic foot and a volume resistivity of about 10?3 ohm-cm to about 103 ohm-cm at a pressure of 60 pounds per square inch.Type: ApplicationFiled: August 5, 2008Publication date: June 30, 2011Applicant: WORLD PROPERTIES, INC.Inventor: Scott Simpson
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Patent number: 7967919Abstract: The present invention provides a method for manufacturing a self-organized rare earth-iron bonded magnet, including: a first step of covering a rare earth-iron magnet powder with oligomer or prepolymer in which one molecule includes at least two or more reactive ground substances to provide a surface-treated magnet powder; a second step of melting and kneading stretchable polymer and the surface-treated magnet powder to coarsely crush the resultant material to provide a granule; a third step of dry blending the granule with hardener to provide a compound; a fourth step of compressing the compound under temperature conditions by which the oligomer or prepolymer, the polymer, and the hardener are caused to melt and to flow to provide a green compact; a fifth step of causing the green compact to be a self-organized rare earth-iron bonded magnet by reacting the oligomer or prepolymer, and polymer with the hardener; and a sixth step of stretching the bonded magnet to transform the shape to any of a circular-shapeType: GrantFiled: May 26, 2005Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventor: Fumitoshi Yamashita
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Publication number: 20110151377Abstract: Compositions including hard magnetic photoresists, soft photoresists, hard magnetic elastomers and soft magnetic elastomers are provided.Type: ApplicationFiled: April 30, 2010Publication date: June 23, 2011Applicant: Simon Fraser UniversityInventors: Bonnie GRAY, Daniel B. LEZNOFF, Jasmine L. KORCOK, Ajit KHOSLA
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Publication number: 20110140030Abstract: Hybrid composite materials with multiscale morphologies are formed by doping polymer submicrometer spheres with semiconductor or metal (e.g. CdS or Ag, respectively) nanoparticles and using these doped microspheres as functional building blocks in production of hybrid periodically structured materials. The preparation of hybrid polymer particles include the following stages: (i) synthesis of monodisperse polymer microspheres, (ii) in-situ synthesis of the inorganic nanoparticles either on the surface, or in the bulk with polymer beads, and (iii) encapsulation of hybrid microspheres with a hydrophobic shell.Type: ApplicationFiled: October 25, 2010Publication date: June 16, 2011Inventor: Eugenia KUMACHEVA
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Publication number: 20110139719Abstract: The invention provides a magnetic particle which can immobilize the intended substance easily and efficiently; and a method for producing thereof. The invention relates to a magnetic particle, comprising an aggregate which comprises a magnetic substance and a compound having an alkyl group, and a gel layer which covers the aggregate, in which the gel layer has a hydrophilic group.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: CHISSO CORPORATIONInventor: Masaru Eguchi
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Electromagnetism suppressing material, electromagnetism suppressing device, and electronic appliance
Patent number: 7959821Abstract: An electromagnetism suppressing material has an increased electromagnetism suppressing effect, can be flexibly formed in various shapes, and is inexpensive. An electromagnetism suppressing device uses the electromagnetism suppressing material, and an electronic appliance uses the electromagnetism suppressing material or the electromagnetism suppressing device. The electromagnetism suppressing material is a liquid material and/or gel material with electrical polarity.Type: GrantFiled: October 31, 2007Date of Patent: June 14, 2011Assignee: Sony CorporationInventors: Yoshihiro Kato, Yoshinori Ito, Katsumi Okayama, Kaoru Kobayashi, Masaki Orihashi, Makoto Suzuki, Takashi Miyazaki -
Publication number: 20110121223Abstract: One embodiment includes a magnetorheological fluid having an on-state yield stress when a magnetic field is applied thereto and comprising a carrier fluid and magnetizable particles suspended in the carrier fluid, and wherein the suspension of the magnetizable particles in the carrier fluid remains essentially homogenous indefinitely in the absence of the magnetic field, and wherein the on-state yield stress of the magnetorheological fluid is greater than or equal to that of poly(alpha)olefin fluid containing the same concentration of magnetizable particles, and wherein the off-state viscosity of the magnetorheological fluid is between about 0.4 and about 12 Pascal-seconds at 40° C.Type: ApplicationFiled: November 23, 2009Publication date: May 26, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: John C. Ulicny, Paul E. Krajewski, Mark A. Golden, Keith S. Snavely
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Publication number: 20110101262Abstract: The invention provides surface-treated reduced iron powder from which a powder magnetic core can be produced so that the powder magnetic core has small core loss and small frequency-dependence of the core loss and exhibits small core loss even when driven at high frequencies of 1 MHz or more. The surface-treated reduced iron powder is obtained by at least surface-treating reduced iron powder prepared by a reduction and slow oxidation method, and contains secondary particles formed through agglomeration of primary particles, the primary particles having an average particle diameter of 0.01-5 ?m. The secondary particles have a D90% particle diameter of 20 ?m or less, the surface of the primary particles is at least in part coated with an insulating layer containing iron phosphate, and the phosphorus content is 500-10000 ppm.Type: ApplicationFiled: October 1, 2010Publication date: May 5, 2011Applicant: TDK CORPORATIONInventors: Tomofumi KURODA, Masahito KOEDA
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Publication number: 20110076767Abstract: A particle including a matrix-forming agent and a polyelectrolyte-amphiphilic agent adduct wherein the polyelectrolyte-amphiphilic agent adduct is in physical communication with the matrix-forming agent. The particle further includes a coated magnetic field-responsive agent and a biomaterial. Methods of making the particle are provided. Also provided are methods of delivery of the biomaterial to a target cell or a target tissue including administering the particle having the matrix-forming agent, polyelectrolyte-amphiphilic agent adduct, the coated magnetic field-responsive agent and the biomaterial; providing a magnetic device associated with the target cell or the target tissue; applying a magnetic force to the particle; and guiding the particle toward the magnetic device by the magnetic force.Type: ApplicationFiled: December 6, 2010Publication date: March 31, 2011Applicant: The Children's Hospital of PhiladelphiaInventors: Michael Chrony, Boris Polyak, Ilia Fishbein, Ivan Alferiev, Robert J. Levy
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Publication number: 20110068291Abstract: A novel method to develop highly conductive functional materials which can effectively shield various electromagnetic effects (EMEs) and harmful radiations. Metallized nanotube polymer composites (MNPC) are composed of a lightweight polymer matrix, superstrong nanotubes (NT), and functional nanoparticle inclusions. MNPC is prepared by supercritical fluid infusion of various metal precursors (Au, Pt, Fe, and Ni salts), incorporated simultaneously or sequentially, into a solid NT-polymer composite followed by thermal reduction. The infused metal precursor tends to diffuse toward the nanotube surface preferentially as well as the surfaces of the NT-polymer matrix, and is reduced to form nanometer-scale metal particles or metal coatings. The conductivity of the MNPC increases with the metallization, which provides better shielding capabilities against various EMEs and radiations by reflecting and absorbing EM waves more efficiently.Type: ApplicationFiled: November 26, 2008Publication date: March 24, 2011Applicant: National Institute of Aerospace AssociatesInventors: Cheol Park, Joycelyn S. Harrison, Negin Nazem, Larry T. Taylor, Jin Ho Kang, Jae-Woo Kim, Godfrey Sauti, Peter T. Lillehei, Sharon E. Lowther
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Publication number: 20110068781Abstract: The invention provides a rubber composition for a magnetic encoder being excellent in durability such as heat resistance, oil resistance and chemical resistance, having high magnetic characteristics and being excellent in processability and a magnetic encoder using the rubber composition. The magnetic rubber composition for the magnetic encoder includes a fluorinated rubber with a Mooney viscosity (ML1+10, 121° C.) of 20 to 100 and a magnetic powder, and the magnetic powder is blended in a proportion of 230 to 1900 parts by weight relative to 100 parts by weight of the fluorinated rubber. The magnetic encoder is provided by vulcanizing and molding the rubber composition.Type: ApplicationFiled: November 26, 2010Publication date: March 24, 2011Inventor: Yoshihiko Yamaguchi
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Patent number: 7910181Abstract: Various embodiments of the present invention are directed to methods for manufacturing complex, anisotropic materials with desirable properties for information storage, processing, and display. Certain of these methods involve employing a magnetic field during manufacture to induce desired orientations of precursors, subunits, and/or molecular subassemblies. The applied magnetic field steers the precursors, subunits, and/or molecular subassemblies into desirable orientations while the precursors, subunits, and/or molecular subassemblies are assembled or self-assemble into a complex, anisotropic material. One embodiment of the present invention is a class of new, complex, well-ordered, network-like materials that include a ferromagnetic-material-based framework in which organic and/or organometallic compounds are organized.Type: GrantFiled: June 19, 2008Date of Patent: March 22, 2011Assignee: Hewlett-Packard Development Company, L.P.Inventors: Patricia A. Beck, Sean Zhang
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Publication number: 20110062371Abstract: A magnetorheological (MR) fluid is described herein. The MR fluid includes a plurality of magnetizable particles having a particle density. The fluid also includes a carrier fluid having a fluid density, and the plurality of magnetizable particles is dispersed within the carrier fluid. A portion of the plurality of magnetizable particles has a particle density that is substantially the same as the fluid density. The MR fluid may include a plurality of magnetizable particles having an outer shell of a magnetizable material and a hollow core. The MR fluid may also include a plurality of magnetizable particles having an outer shell of a magnetizable material and a solid core. The MR fluid may include a plurality of magnetizable particles having a matrix and a plurality of sub-particles embedded therein. The core or matrix of these particles may include a ceramic, glass or polymer, or a combination thereof.Type: ApplicationFiled: September 16, 2009Publication date: March 17, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventor: PRABHAKAR MARUR
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Publication number: 20110062372Abstract: A magnetic material is provided, which is represented by the general formula of: Ra-x-yHoxDyy Fe1-a-b-c-d Cod McBb, where x, y, a, b, c, and d are weight percentages of related elements and in respective ranges of: about 28%?a?about 34%, about 0.95%?b?about 1.3%, about 0?c?about 1.5%, about 1%?d?about 10%, about 15%?x?about 20%, about 3%?y?about 8%. R is a rare earth element, which is selected from the group consisting of: Nd, Pr, La, Ce, Gd, Tb, and combinations thereof. M is a metal selected from the group consisting of: Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, Si, and combinations thereof.Type: ApplicationFiled: August 20, 2010Publication date: March 17, 2011Inventors: Qing Gong, Xiaoxia Deng, Xin Du
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Publication number: 20110060136Abstract: Dendrimer-coated magnetic fine particles comprise magnetic fine particles, a lipid bilayer covering a surface of individual magnetic fine particles, and a dendrimer bound to an outer layer of the lipid bilayer. With the dendrimer-coated magnetic fine particles, the dendrimer is positively charged are brought into contact with a nucleic acid-containing solution to adsorb the nucleic acid on the dendrimer, while the nucleic acid-adsorbed fine particles are collected by magnetic force to recover the nucleic acid from the solution.Type: ApplicationFiled: September 9, 2010Publication date: March 10, 2011Applicants: TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, YOKOGAWA ELECTRIC CORPORATIONInventors: Tadashi MATSUNAGA, Tsuyoshi TANAKA, Keiichi HATAKEYAMA, Takeo TANAAMI, Hitoshi WAKE, Tomoyuki TAGUCHI, Takeyuki MOGI
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Patent number: 7902275Abstract: Composite materials are disclosed having low filler percolation thresholds for filler materials into the composite matrix material along with methods of controlling filler interconnectivity within the composite matrix material. Methods are, thus, disclosed that provide the ability to control the desired properties of the composites. The composites of the present disclosure are characterized by a “pseudo-crystalline” microstructure formed of matrix particles and filler particles where the matrix particles are faceted and substantially retain their individual particle boundaries and where the filler particles are interspersed between the matrix particles at the individual matrix particle boundaries such that the filler particles form a substantially interconnected network that substantially surrounds the individual faceted matrix particles.Type: GrantFiled: May 24, 2010Date of Patent: March 8, 2011Assignee: Georgia Tech Research CorporationInventors: Rosario A. Gerhardt, Runqing Ou, Zhi Li, Robert J. Samuels, Charles J. Capozzi
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Publication number: 20110052382Abstract: A gas turbine engine includes a fan including a plurality of circumferentially spaced rotatable blades, and a fan casing for containing fragments of fan blades in the event of blade release, the fan casing having a shell surrounding the blades and circumscribing a containment zone of the fan. The shell is made of a fiber reinforced polymer composite material which includes nanoparticles.Type: ApplicationFiled: August 26, 2009Publication date: March 3, 2011Inventor: Kin-Leung Cheung
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Publication number: 20110039979Abstract: Filled polyamide molding materials, in particular polyamide molding materials with medium filler content, are producible from a polyamide blend and for example by compounding with chopped or endless fibers on two-screw extruders, and have a combination of reduced water absorption and good mechanical properties, which results in very good dimensional stability and reduced variation of the electrical properties of the produced molded part, such as an antenna housings of stationary or mobile communication devices. These thermoplastic polyamide molding materials are suitable for manufacturing molded parts and other semi-finished or finished parts, for example by extrusion, injection molding, pressing, direct process or direct compounding, respectively, wherein the compounded polyamide molding material is directly processed by injection molding or other shaping methods.Type: ApplicationFiled: October 28, 2010Publication date: February 17, 2011Applicant: EMS-CHEMIE AGInventors: Ornulf REXIN, Etienne Aepli
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Patent number: 7887647Abstract: A soft magnetic material includes a plurality of composite magnetic particles each including a metal magnetic particle and an insulating coating film covering the metal magnetic particle. Each of the plurality of composite magnetic particles has a ratio Rm/c of a maximum diameter to a circle-equivalent diameter of more than 1.15 and not more than 1.35. The insulating coating film is composed of a thermosetting organic material and has a pencil hardness of 5H or higher after thermosetting. With this material, an eddy current loss can be reduced, and a compact with a high strength can be formed.Type: GrantFiled: September 8, 2006Date of Patent: February 15, 2011Assignee: Sumitomo Electric Industries, Ltd.Inventors: Toru Maeda, Yasushi Mochida, Takao Nishioka
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Publication number: 20110031431Abstract: Magnetic fiber structures include a fiber and a plurality of permanent magnet particles carried by the fiber.Type: ApplicationFiled: August 4, 2009Publication date: February 10, 2011Inventors: John R. Hull, Michael Strasik, Mark S. Wilenski