Synthetic Resin Patents (Class 252/62.54)
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Publication number: 20100065771Abstract: The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 ?m and a particle diameter x90 of 4.3 to 5.4 ?m wherein the x90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.Type: ApplicationFiled: October 2, 2009Publication date: March 18, 2010Applicant: TODA KOGYO CORPORATIONInventors: Yasuhiko FUJII, Minoru Ohsugi, Yasushi Nishio, Yosuke Koyama, Shigeru Takaragi
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Publication number: 20100068387Abstract: The invention provides an aqueous inkjet ink composition comprises a polymeric compound comprising discrete particles responsive to an external stimulus, and a functional material, wherein the functional material may be incorporated as part of the polymeric particles, the particles causing the composition to have a first rheological state and a different second rheological state in response to a stimulated change in conditions, the first rheological state being associated with a first lower viscosity of the composition, wherein the particles have a first lower volume, enabling the composition to pass through an inkjet printhead orifice and the second rheological state being associated with a second higher viscosity of the composition, wherein the particles have a second higher volume, enabling immobilisation of droplets of the composition on a substrate.Type: ApplicationFiled: December 19, 2007Publication date: March 18, 2010Inventors: Danuta Gibson, John M. Higgins, Stephanie V. Desrousseaux, Andrew M. Howe, Andrew Howe, Andrew Clarke, Christian V. Nicholas, John H. Hone
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Publication number: 20100059905Abstract: The invention provides a magnetic rubber composition prepared by kneading an anisotropic magnetic powder, alkoxysilane represented by the formula below, and a rubber binder: RaSiX4-a where, in the formula, R is an alkyl group represented by CnH2n+1, X represents a hydrolysable group such as a methoxy group and an ethoxy group, and a represents an integer of 0 to 3.Type: ApplicationFiled: November 16, 2009Publication date: March 11, 2010Inventor: Tadashi Kasamoto
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Publication number: 20100051851Abstract: Disclosed herein is an iron powder for dust cores which effectively keeps insulation among iron powder particles and excels in mechanical strength even though the amount of insulating material is reduced to achieve high-density forming and which also exhibits good thermal stability necessary for electrical insulating properties even after heat treatment at high temperatures. The iron-based magnetic powder has layers of phosphoric acid-based film and silicone resin film sequentially formed on the surface thereof, said phosphoric acid-based film containing at least one element selected from the group consisting of Co, Na, S, Si, and W.Type: ApplicationFiled: August 2, 2007Publication date: March 4, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroyuki Mitani, Nobuaki Akagi, Hirofumi Houjou, Chio Ishihara, Makoto Iwakiri, Sohei Yamada, Yasukumi Mochimizo
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Publication number: 20100038579Abstract: Cellular elastomer which is anisotropic, with anisotropy being defined by the compressive modulus in one of three orthogonal directions being greater than that in the other two directions by a factor of at least 1.5.Type: ApplicationFiled: December 11, 2007Publication date: February 18, 2010Applicant: BASF SEInventors: Joern Duwenhorst, Maximilian Ruellmann, Frank Prissok, Sven Lasai, Steffen Mayer, Michael Harms, Claus Gabriel
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Publication number: 20100028667Abstract: Flexible magnetic sheets made with high-energy strontium ferrite and oriented magnetic particles of strontium ferrite and barium ferrite, such as to decrease thickness while maintaining a strong magnetic energy as well as flexibility.Type: ApplicationFiled: October 13, 2009Publication date: February 4, 2010Inventor: Thomas G. Love
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Publication number: 20100019189Abstract: Provided are a polymer which, when wetted, enables a medical apparatus for use in MRI diagnosis and therapy to be easily visible under MRI and, simultaneously, develops surface lubricity, and a medical apparatus coated with the polymer. The polymer including a copolymer composed of a substance for shortening relaxation time of a nuclear species capable of being detected by magnetic resonance, a moiety having a reactive group, and a moiety for developing lubricity is used to coat the medical apparatus, whereby excellent peel resistance, high lubricity, visibility under magnetic resonance, easy applicability, and high safety can be obtained.Type: ApplicationFiled: September 21, 2007Publication date: January 28, 2010Applicant: TERUMO KABUSHIKI KAISHAInventor: Tomoka Kurita
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Publication number: 20100006795Abstract: A process for the preparation of polymer magnetic particles, which comprises: (a) providing a water phase containing magnetic components homogeneously dispersed therein; (b) wherein the water phase is contacted with or further contains a polymerisable metal-containing or organic monomer which is soluble in the water phase; and (c) polymerizing the monomer in the presence of the magnetic in which the magnetic components are substantially uniformly distributed; wherein at least a part of the polymerizing step (c) is carried out in a water-in-oil emulsion in which the water phase containing the magnetic components homogeneously dispersed therein is present as a discontinuous phase in a continuous oil phase.Type: ApplicationFiled: September 15, 2009Publication date: January 14, 2010Inventors: Vidar Skagestad, Lars Kilaas
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Publication number: 20090309597Abstract: The subject of the invention is superparamagnetic nanoparticle probes based on iron oxides, to advantage magnetite or maghemite, with modified surface, coated with mono-, di- or polysaccharides from the group including D-arabinose, D-glucose, D-galactose, D-mannose, lactose, maltose, dextrans and dextrins, or with amino acids or poly(amino acid)s from the group including alanine, glycine, glutamine, asparagine, histidine, arginine, L-lysine, aspartic and glutamic acid or with synthetic polymers based on (meth)acrylic acid and their derivatives selected from the group containing poly(N,N-dimethylacrylamide), poly(N,N-dimethylmethacrylamide), poly(N,N-diethylacrylamide), poly(N,N-diethylmethacrylamide), poly(N-isopropylacrylamide), poly(N-isopropylmethacrylamide), which form a colloid consisting of particles with narrow distribution with polydispersity index smaller than 1.3, the average size of which amounts to 0.5-30 nm, to advantage 1-10 nm, the iron content is 70-99.9 wt. %, to advantage 90 wt.Type: ApplicationFiled: February 23, 2007Publication date: December 17, 2009Inventors: Daniel Horák, Eva Syková, Michal Babic, Pavla Jendelová, Milan Hájek
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Publication number: 20090311546Abstract: A method for manufacturing a rubber magnet with a colored facial gum material layer and a rubber magnet thereof. A colored gum material layer is paved on a surface of the rubber magnet. A surfactant is added into the colored gum material layer. An identical surfactant or a surfactant with very close polarity is added into the material of the rubber magnet, whereby the surfaces of the gum material layer and the rubber magnet can tightly adhere to each other without easy peeling. In addition, antiscaling agent, wetting/spreading agent and defoaming agent are added into the gum material layer to fully wet the color and uniformly spread the color over the gum material so as to enhance the evenness of the color.Type: ApplicationFiled: July 22, 2009Publication date: December 17, 2009Inventors: Hung-Chih Wu, Chen-Liang Fan Chiang
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Publication number: 20090302512Abstract: 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: ApplicationFiled: June 5, 2009Publication date: December 10, 2009Applicant: Tridelta Weichferrite GmbHInventors: Silvio Gablenz, Marko Kloucek
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Publication number: 20090302263Abstract: The present invention provides a conducting copolymer ferromagnetic composite. Particularly, the present invention relates to a conducting copolymer of aniline and ethylene-dioxy thiophene containing ferrite particles. The present invention also provides insitu polymerization of aniline and ethylene-dioxy thiophene in the presence of ferrite particles and suitable surfactant medium. This conducting copolymer ferromagnetic composite can be used for the dissipation of electrostatic charge, for the shielding of electromagnetic interference and as absorbing of electromagnetic waves in the microwave region.Type: ApplicationFiled: May 4, 2009Publication date: December 10, 2009Applicant: Council of Scientific & Industrial ResearchInventors: Sundeep Kumar Dhawan, Kuldeep Singh, Nikhil Sobti, Anil Ohlan, Parveen Saini, Beena Gupta, Rajendra Prasad Pant, Ravinder Kumar Kotnala, Kishan Hari, Prafulla Chandra Kothari
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Publication number: 20090294723Abstract: 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: August 6, 2009Publication date: December 3, 2009Inventor: Yoshihiko Yamaguchi
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Publication number: 20090285894Abstract: Micro-sized particles having a polymeric structure of cells are provided. Also provided is a method of producing micro-sized particles having a polymeric structure comprising: (1) forming a homogenous solution by heating a mixture of a high molecular weight polymer and a low molecular weight material, wherein said low molecular weight material makes up at least about 50% by weight of the homogenous solution, (2) forming a dispersed solution by dispersing the homogenous solution formed in step (1) into an inert material, (3) cooling the dispersed solution to cause the high molecular weight polymer to phase separate from the low molecular weight material, (4) forming solid particles comprised of said low molecular weight material trapped inside a structure of cells of said high molecular weight polymer, and (5) removing the solid particles from the dispersed solution.Type: ApplicationFiled: November 13, 2008Publication date: November 19, 2009Inventors: Xiaorong Wang, Mindaugas Rackaitis, Naruhiko Mashita, Victor J. Foltz
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Publication number: 20090266604Abstract: Disclosed is a resin composition containing a hexagonal ferrite and a resin, which is characterized in that the hexagonal ferrite is contained in an amount of 50-98 parts by weight per 100 parts by weight of the total of the resin composition.Type: ApplicationFiled: November 28, 2007Publication date: October 29, 2009Inventor: Tetsuji Tokiwa
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Patent number: 7608197Abstract: The present invention relates to magnetorheological elastomers comprising at least one non-magnetizable elastomeric carrier medium and magnetizable particles contained therein and also to the use thereof. In the case of MREs of this type, the mechanical properties, such as the rigidity modulus, can be changed reversibly by an applied magnetic field.Type: GrantFiled: August 25, 2005Date of Patent: October 27, 2009Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.Inventors: Holger Böse, Rene Röder
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Publication number: 20090261287Abstract: There is disclosed stereolithographic manufacture of more complex components including at least one active material without the need for fabrication. Fabrication can introduce component discontinuities that hinder performance of the final component. Thus, some embodiments entail a method of manufacture for complex, field activated components such as piezoelectric or magnetostrictive sensors or actuators.Type: ApplicationFiled: April 14, 2009Publication date: October 22, 2009Inventors: Paul Anthony Withey, Max Eric Schlienger
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Publication number: 20090250652Abstract: The present invention relates to a stable sediment dispersion which can be used above all as electrorheological (ERF) and/or magnetorheological fluid (MRF), a method for production thereof and also use thereof.Type: ApplicationFiled: April 20, 2007Publication date: October 8, 2009Applicant: FRAUNHOFER-GESELLSCHAFT zur Forderung der Angewandten Forschung e.VInventors: Jochen Uebe, Erich Seider, Silvia Gaul, Holger Böse
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Patent number: 7598316Abstract: A process for the preparation of polymer magnetic particles, which comprises: providing a water phase containing magnetic components homogeneously dispersed therein, wherein the water phase is contacted with or further contains a polymerisable metal-containing or organic monomer which is soluble in the water phase, and polymerizing the monomer in the presence of the magnetic components so as to form polymer magnetic particles in which the magnetic components are substantially uniformly distributed; wherein at least a part of the polymerizing step is carried out in a water-in-oil emulsion in which the water phase containing the magnetic components homogenously dispersed therein is present as a discontinuous phase in a continuous oil phase.Type: GrantFiled: July 4, 2002Date of Patent: October 6, 2009Assignee: QIAGEN GmbHInventors: Vidar Skagestad, Lars Kilaas
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Publication number: 20090246560Abstract: An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support, wherein the magnetic layer comprises a compound denoted by general formula (1): wherein, in general formula (1), X denotes a divalent linking group, each of R1 and R2 independently denotes an alkyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkoxyalkyl group having 2 to 20 carbon atoms, or an aryloxyalkyl group having 7 to 20 carbon atoms, and M denotes a hydrogen atom or a cation.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Applicant: FUJIFILM CorporationInventors: Masahiko Mori, Kazufumi Omura
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Publication number: 20090242825Abstract: An iron-based soft magnetic powder for dust core includes an iron-based soft magnetic matrix powder, and arranged thereon in the following order, a phosphate coating and a silicone resin coating. The phosphate coating contains P, Co, Na, and S in combination with at least one of Al and Cs. This iron powder for dust core has superior mechanical strength, in which effective insulation is achieved between iron powdery particles even when the amount of an insulating material is reduced for realizing high-density molding. The iron powder for dust core is also superior in thermal stability, so that electrical insulation is maintained even after a heat treatment at high temperatures.Type: ApplicationFiled: February 10, 2009Publication date: October 1, 2009Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Takeshi OHWAKI, Kasumi Yanagisawa, Hiroyuki Mitani, Satoshi Nishida, Hirofumi Houjou, Nobuaki Akagi
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Publication number: 20090236558Abstract: A magnetic polymer particle develops a magnetic latent image. The magnetic polymer particle includes a magnetic component, a polymer, and a colorant. The magnetic component is a magnetic particle containing iron having a number average particle diameter of from about 0.2 ?m to about 1.2 ?m. The magnetic particle is contained in one magnetic polymer particle in an amount of from 1 to 10 particles. The number average particle diameter of the magnetic polymer particle is from about 2.0 ?m to about 7.0 ?m.Type: ApplicationFiled: October 2, 2008Publication date: September 24, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Takako Kobayashi, Yoshihiro Inaba
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Publication number: 20090238888Abstract: In one embodiment, the present invention relates to a method for initiating radical polymerization of at least one monomer composition, the method comprising the steps of: supplying at least one monomer charge; and initiating radical polymerization of the at least one monomer charge via a hydrogen peroxide initiator and at least one polyamine co-initiator, wherein the method is carried out in an inverse-microemulsion, the inverse-microemulsion being a water/oil emulsion.Type: ApplicationFiled: October 31, 2005Publication date: September 24, 2009Applicant: THE UNIVERSITY OF AKRONInventor: Jun Hu
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Publication number: 20090230347Abstract: Formulation comprising a polymerizable monomer and/or a polymer and, dispersed therein, a superparamagnetic powder, which comprises aggregated primary particles, the primary particles being built up from magnetic metal oxide domains having a diameter of from 2 to 100 nm in a nonmagnetic metal oxide or metalloid oxide matrix. Process for heating the formulation in a magnetic or electromagnetic alternating field. Use of the formulation as an adhesive composition.Type: ApplicationFiled: November 29, 2005Publication date: September 17, 2009Applicant: DEGUSSA GmbHInventors: Markus Pridöhl, Guido Zimmermann, Michael Kröll, Harald Häger
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Publication number: 20090226696Abstract: A polymer foam layer is disclosed, having a first surface and an opposite second surface; and a plurality of magnetic, electrically conductive, high aspect ratio particles aligned into mutually isolated columns that essentially continuously span the foam between the first surface and the opposite second surface of the polymer foam layer. Methods for the manufacture of the layers are also disclosed. The foams are useful as gaskets for electromagnetic shielding, grounding pads, battery contact conductive spring elements, and the like.Type: ApplicationFiled: March 16, 2009Publication date: September 10, 2009Applicant: WORLD PROPERTIES, INC.Inventor: Scott S. Simpson
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Publication number: 20090218539Abstract: A magnetic composition for power conversion includes a thermoplastic polymer and magnetic powders. The composition has a tensile strength of greater than 20 N/nm2.Type: ApplicationFiled: February 28, 2008Publication date: September 3, 2009Inventors: Ka Wai Cheng, Yuen Was Wong, Wei Tai Wu, Kai Ding, Yiu Lun Ho, Tsz Kong Cheung, Chi Keong Cheong
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Patent number: 7572388Abstract: A magnet compound material to be compression molded, said magnet compound material comprising a magnetic powder and a binder resin particles, wherein a ratio of Dv to Dn is in a range of 1.1 to 1.3, Dv and Dn of the binder resin particles denote the volume average particle diameter and the number average particle diameter, respectively.Type: GrantFiled: August 2, 2006Date of Patent: August 11, 2009Assignee: Ricoh Company, Ltd.Inventors: Satoshi Terashima, Sumio Kamoi, Yoshiyuki Takano, Tsuyoshi Imamura, Kyohta Koetsuka, Noriyuki Kamiya, Mieko Terashima
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Publication number: 20090197782Abstract: A soft magnetic material includes a plurality of composite magnetic particles including a metal magnetic particle and an insulating film surrounding a surface of the metal magnetic particle. The insulating film also contains a phosphate. The soft magnetic material further includes an aromatic polyetherketone resin and a metallic soap and/or an inorganic lubricant having a hexagonal crystal structure. The metallic soap and the inorganic lubricant are particles with an average particle size of not more than 2.0 ?m.Type: ApplicationFiled: May 15, 2007Publication date: August 6, 2009Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., DENSO CORPORATION, SUMITOMO ELECTRIC SINTERED ALLOY, LTD.Inventors: Naoto Igarashi, Takao Nishioka, Yoshiyuki Shimada, Tsuyoshi Akao
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Publication number: 20090191401Abstract: Magnetic receptive Paints and coatings have been developed to allow one to paint a wall with this coating and apply magnets to this surface. The further development of magnetic receptive coatings incorporates the use of multiple size particles giving the finished surface a smoother appearance and increasing the particle load in the dry mill surface. This is useful in the coating of substrates where the need to coat the thinnest possible coating on the surface of a substrate such as papers and films as well as painting on walls, gives you the highest magnetic receptive surface possible at the thinnest mill thickness of applied coating.Type: ApplicationFiled: April 28, 2005Publication date: July 30, 2009Inventor: Dayton Joseph Deetz
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Publication number: 20090173906Abstract: The present invention relates to ethylene vinyl acetate based polymer foams with low density and superior injection molding characteristics, a preparation method thereof and a material for medical and health-care use using the same, more particularly to ethylene vinyl acetate based polymer foams with low density prepared by blending, masticating, pelletizing and foaming a matrix resin comprising ethylene vinyl acetate (EVA) resin and ethylene methyl acrylate (EMA) resin under specific condition, which has low density and superior injection molding characteristics and improved biocompatibility to human body, making them a useful environment-friendly material and particularly applicable to medical or health-care use, a preparation method thereof and a material for medical and health-care use using the same.Type: ApplicationFiled: October 20, 2006Publication date: July 9, 2009Applicant: COMTECH CHEMICAL CO., LTD.Inventors: Young Kum Park, Ho Min Bae, Dong Ho Park, Ju-Yeon Lee, Jung Ho Song
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Publication number: 20090165949Abstract: 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: ApplicationFiled: November 21, 2006Publication date: July 2, 2009Applicant: Evonik Roehm GmbHInventors: Sebastian Roos, Gerd Löhden, Jan Hendrik Schattka, Manfred Braum, Markus Pridöhl, Guido Zimmermann, Andreas Hüther
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Publication number: 20090159834Abstract: The invention relates to hybrid materials comprising polymers which envelop nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders, to a process for producing these materials and to their use.Type: ApplicationFiled: November 21, 2006Publication date: June 25, 2009Applicant: EVONIK ROEHM GMBHInventors: Sebastian Roos, Gerd Löhden, Jan Hendrik Schattka, Manfred Braum, Markus Pridöhl, Guido Zimmermann, Andreas Hüther
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Publication number: 20090155195Abstract: The present invention related to (micro-or nano-) capsules that have two different functional groups on the outer shell of the particles that allow deposition onto the textile surfaces (i.e. exhibit substantivity) and subsequent covalent bonding of the particles onto the textile (i.e. are reactive towards the fiber).Type: ApplicationFiled: November 20, 2006Publication date: June 18, 2009Inventors: Bryan David Grey, Kishor Kumar Mistry, Chun-tian Zhao
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Publication number: 20090127493Abstract: A method for the production of pressed permanent magnets comprises the following steps: A mixture of at least one magnetic powder and a thermosetting binder is provided and pressed to produce a moulded body. In order to obtain a permanent and particularly reliable protection against oxidation and corrosion, the moulded body is impregnated with an acid and solvent mixture in an impregnating bath before the cure of the thermosetting binder, whereby the entire surface of the permanent magnet is coated with a reaction layer [FIG. 1].Type: ApplicationFiled: April 25, 2007Publication date: May 21, 2009Applicant: Vacuumschmelze GmbH & Co. KGInventors: Georg Werner Reppel, Volker Zellmann
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Publication number: 20090121176Abstract: A rubber composition, which comprises 100 parts by weight of an ethylene-alkyl acrylate copolymer rubber, 5-40 parts by weight of EPDM, 1-40 parts by weight of an ?-olefin oligomer, 0.5-4 parts by weight of an organic peroxide cross-linking agent, 0.5-4 parts by weight of an amine-based vulcanizing agent, and 300-1,000 parts by weight of magnetic powder. The rubber composition is a rubber composition filled a magnetic powder at a high packing density, where an ethylene-alkyl acrylate copolymer rubber having amine vulcanizable groups as a binder, and effectively usable in rubber-bonded sensor magnets, etc., without any foaming at the time of vulcanization molding and with distinguished processabilities such as mold releasability, etc.Type: ApplicationFiled: June 6, 2006Publication date: May 14, 2009Inventors: Eiji Komiya, Shiro Hirose
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Publication number: 20090095937Abstract: A magnetic rubber composition for encoder having a magnetic characteristic in sufficient application range, used as encoder after magnetization as well as heat resistance, water resistance and oil resistance required for use as encoder, and excellent processing property, and capable of being bonded by vulcanization with a metal, is provided. Furthermore, a magnetic rubber composition for encoder capable of obtaining sufficient magnetic force required for encoder on a circumference of the molded encoder as well as capable of effectively restraining variation of the level of magnetic force, is provided. It is provided by comprising 300 to 1,800 parts of strontium-ferrite, or 300 to 1,800 parts of barium-ferrite, or 300 to 1,800 parts of a mixture of strontium-ferrite and barium-ferrite, 0.5 to 2 parts of silane coupling agent, and 1 to 10 parts of lubricating agent, per 100 parts of a hydrogenated nitrile butadiene rubber with 15 to 50% of acrylonitrile amount and 80 to 99% of hydrogenation ratio.Type: ApplicationFiled: December 2, 2008Publication date: April 16, 2009Inventor: Yoshihiko Yamaguchi
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Publication number: 20090072186Abstract: An electromagnetic wave absorption material and a manufacturing method thereof are disclosed. Mix 40% to 70% weight percent liquid resin with 30% to 60% weight percent bamboo charcoal evenly. After cooling, pour the mixture into a mold for curing to produce sheet product. The microwave absorption material of the present invention meets environmental requirements.Type: ApplicationFiled: September 19, 2007Publication date: March 19, 2009Applicant: CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, ARMAMENTS BUREA,M.N.D.Inventors: JEN-SUNG HSU, TZU-HAO TING, KAO-HUI WU, MING-HO CHANG
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Publication number: 20090068115Abstract: Amine functionalized magnetic nanoparticle compositions and processes for synthesizing the same are described. The process consists of obtaining a carboxylated polymer in substantially pure form, which is used to prepare a substantially size homogeneous, polymer coated carboxyl, functionalized magnetic nanoparticle. The carboxyl groups are converted to reactive primary amino groups by the use of a water-soluble carbodiimide followed by reaction of a large excess of a diamine. The amine-terminated nanoparticles are then reacted with bifunctional crosslinking agents and with various biomolecules to make nanoparticles for in vitro assays, cell sorting applications and target specific MR contrast agents.Type: ApplicationFiled: May 9, 2008Publication date: March 12, 2009Inventors: Debra A. Gaw, Lee Josephson
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Publication number: 20090057603Abstract: A magnetic induction foam molding apparatus comprising: a pair of electromagnet parts, each of which has a core part composed of a ferromagnet and a coil part placed on the outer circumference surface of the core part, and that are placed so as to face each other and depart from each other with a predetermined distance in the axis direction of the core part; a foaming mold interposed between the pair of electromagnet parts, inside which a cavity is defined; and a yoke part connecting back surfaces of the respective core parts of the pair of the electromagnet pats so as to form a magnetic path between a pair of the back surfaces. In the cavity of the foaming mold, a uniform magnetic field is formed.Type: ApplicationFiled: August 21, 2008Publication date: March 5, 2009Applicants: TOKAI RUBBER INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION NAGOYA INSTITUTE OF TECHNOLOGYInventors: Koji Tomiyama, Yasushi Ido
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Patent number: 7494600Abstract: The invention concerns powder compositions consisting of electrically insulated particles of a soft magnetic material of an iron or iron-based powder and 0.1-2% by weight of a lubricant selected from the group consisting of fatty acid amides having 14-22 C atoms. Optionally a thermoplastic binder such as polyphenylene sulphide may be included in the composition. The invention also concerns a method for the preparation of soft magnetic composite components.Type: GrantFiled: December 20, 2004Date of Patent: February 24, 2009Assignee: Höganäs ABInventors: Lisa Kjellén, Åsa Ahlin, Lars Hultman, Ola Andersson
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Publication number: 20090039308Abstract: Modified polymers are prepared by providing a nanotube or nanoparticle suspension, adding a preformed polymer, swelling the preformed polymer in the suspension, and isolating the modified polymer from the suspension. The polymer may be a swellable polymer in the form of polymeric yarns, fibres, fabrics, ribbons or films. The swelling may be carried out using ultrasonic treatment.Type: ApplicationFiled: July 24, 2006Publication date: February 12, 2009Inventors: Iouri Kuzmich Gounko, Hugh Hayden, Jonathan Nesbit Coleman, Ian Edward O'Connor, Werner Josef Blau, Rowan Blake
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Publication number: 20090039644Abstract: Systems and methods for using microscopic capsules containing orientable materials for document security and processing applications are presented. A security application comprising a medium having a substrate and a plurality of microcapsules is disclosed. The microcapsules contain magnetically orientable material and a liquid. The magnetically orientable material is oriented in a first alignment. Application of a magnetic field to the medium orients the magnetically orientable material to a second alignment, thereby altering the opacity of the medium. Magnetic material may also be dragged into a concentrated arrangement by a magnetic field, thereby altering the opacity of the medium.Type: ApplicationFiled: July 21, 2008Publication date: February 12, 2009Applicant: Spectra Systems CorporationInventor: Nabil M. Lawandy
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Publication number: 20090014681Abstract: A magnetorheological fluid formulation comprising magnetizable particles dispersed in carrier fluid and a thixotropic agent wherein the thixotropic agent comprises a fluorocarbon grease.Type: ApplicationFiled: July 12, 2007Publication date: January 15, 2009Inventors: Vardarajan R. Iyengar, Sally M. Yurgelevic, Robert T. Foister
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Publication number: 20090014682Abstract: Carrier polymer particles comprising organic polymer particles having a particle diameter of 0.1 to 20 micrometers and a saccharide with which the surface of the organic polymer particles is covered, the organic polymer particles and the saccharide being chemically bonded.Type: ApplicationFiled: May 17, 2006Publication date: January 15, 2009Applicant: JSR CORPORATIONInventors: Masayuki Takahashi, Tetsuo Fukuta, Kiyoshi Kasai, Toshihiro Ogawa, Satoshi Katayose, Kouji Tamori, Kinji Yamada
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Publication number: 20090004466Abstract: A polymer composition with a polymer matrix material and magnetic particles. The composition is selectively electro-magnetically heatable by an electrical induction energy frequency that is pulse width modulated through variable time cycles to provide controlled heating.Type: ApplicationFiled: November 13, 2007Publication date: January 1, 2009Inventors: Drew P. LaMarca, Bryan Agosto
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Publication number: 20080318045Abstract: The present invention relates to magnetorheological elastomers comprising at least one non-magnetisable elastomeric carrier medium and magnetisable particles contained therein and also to the use thereof. In the case of MREs of this type, the mechanical properties, such as the rigidity modulus, can be changed reversibly by an applied magnetic field.Type: ApplicationFiled: August 25, 2005Publication date: December 25, 2008Applicant: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Holger Bose, Rene Roder
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Publication number: 20080315148Abstract: A method for producing a rubber compound wherein the mechanical properties thereof are improved. In particular, the rubber compound has an increased elongation at rupture and/or increased tensile strength and/or increased tear strength and also a reduced compression set (DVR). The rubber compound includes a rubber which has at least two functional groups which can be cross-linked by hydrosilylation, a cross-linking agent consisting of hydrosiloxane or a hydrosiloxane derivative or a mixture of several hydrosiloxanes or derivatives, which include at least two SiH-groups per molecule in the centre, a hydrosilylation catalyst system, at least one filling material and a coagent which can be cross-linked by hydrosilylation.Type: ApplicationFiled: September 16, 2006Publication date: December 25, 2008Applicant: Carl Freudenberg KGInventors: Mathias Adler, Ruth Bieringer, Michael Viol
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Publication number: 20080308973Abstract: The invention provides a magnetic rubber composition prepared by kneading an anisotropic magnetic powder, alkoxysilane represented by the formula below, and a rubber binder: RaSiX4?a where, in the formula, R is an alkyl group represented by CnH2n+1, X represents a hydrolysable group such as a methoxy group and an ethoxy group, and a represents an integer of 0 to 3.Type: ApplicationFiled: August 12, 2008Publication date: December 18, 2008Inventor: Tadashi Kasamoto
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Publication number: 20080296530Abstract: Magnetorheological materials having a supramolecular polymer gel as a component of the carrier are disclosed. Useful supramolecular polymers for gels include those having bipyridine or terpyridine ligands which can participate in metal coordination bonding. The magnetizable particles of magnetorheological materials can have supramolecular surfactant-polymer coatings.Type: ApplicationFiled: November 19, 2007Publication date: December 4, 2008Inventors: Alan Fuchs, Faramarz Gordaninejad, Hatice Gecol, Ben Hu, Beril Kavlicoglu, Joko Sutrisno
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Publication number: 20080283792Abstract: The present invention relates to a separation medium with various functionalities suitable for, for example, isolation of proteins, cells, and viruses and also for diagnostic applications and cell cultivation. The separation medium comprises magnetic metal particles, preferably coated with an inert synthetic polymer, and pre-functionalised beads. These particles and beads are provided encapsulated in a hydrophilic porous polymer, preferably agarose. The beads may be used for cell cultivation or for chromatography. When the beads are used for chromatography the agarose layer may be provided with ligands having affinity for selected biomolecules.Type: ApplicationFiled: October 23, 2006Publication date: November 20, 2008Applicant: GE HEALTHCARE BIO-SCIENCES ABInventors: Andreas Axen, Eva Holmgren, Nils Norrman, Tobias Soderman