Solid-walled Microcapsule Formed By In Situ Polymerization Patents (Class 427/213.34)
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Patent number: 7736691Abstract: The present invention relates to functional organic particles having functional nanoparticles dispersed in an organic polymeric matrix, wherein the distribution of the functional nanoparticles is increased in the direction toward increasing the particle diameter from the center of the functional organic particles, and to a method for preparing the same.Type: GrantFiled: February 21, 2008Date of Patent: June 15, 2010Assignee: LG Chem, Ltd.Inventors: Chang Soon Lee, Woong Ki Lee, Woo Cheul Jung
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Patent number: 7718572Abstract: An aqueous microcapsule suspension liquid exhibiting an excellent (long-term) storage stability and allowing easy re-dispersion and dilution with water even after such a storage, is produced by adding a microorganism-fermented polysaccharide of succinoglycan type as a thickening agent into a microcapsule slurry, or by adding such a microorganism-fermented polysaccharide as a thickening agent to a microcapsule slurry after uniform dilution with water.Type: GrantFiled: June 11, 2001Date of Patent: May 18, 2010Assignee: Kureha CorporationInventors: Yutaka Igari, Tsuneo Okamoto, Yuzi Hori
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Patent number: 7700333Abstract: This invention relates to a method for immobilizing cells under laminar flow conditions in a matrix formed by biocompatible charged polymers, to a flow device for the use with the method of the present invention, and to uses of the polymer matrices containing the cells immobilized using the method of the present invention.Type: GrantFiled: July 26, 2004Date of Patent: April 20, 2010Assignee: Agency for Science Technology & ResearchInventors: San San Susanne Ng, Hanry Yu
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Publication number: 20100056668Abstract: An opacifying pigment encapsulated in polymer including a pigment particle having an average particle diameter of from 0.005 to 5 microns and an index of refraction of at least 1.8; an aminophosphorus acid-functional first polymer having been used to disperse the pigment particle in an aqueous medium; and a second polymer that at least partially encapsulates the dispersed pigment particle is provided. A process for forming the opacifying pigment encapsulated in polymer and compositions including the particles are also provided.Type: ApplicationFiled: August 19, 2009Publication date: March 4, 2010Inventor: Ward Thomas Brown
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Patent number: 7662444Abstract: A liquid crystal microcapsule, comprising a liquid crystal and a polyurea film encapsulating the liquid crystal, wherein at least one of an alkyl group and a fluoroalkyl group is bonded directly or indirectly via a urethane bond to the polyurea. A method of producing a liquid crystal microcapsule, comprising: forming a polyurea and the film thereof by allowing an aligner, which is a compound having a hydroxyl group and at least one of an alkyl group and a fluoroalkyl group, to react with a polyisocyanate, a polyamine, and water; and encapsulating a liquid crystal with the film. A liquid crystal display device using the liquid crystal microcapsule.Type: GrantFiled: July 13, 2005Date of Patent: February 16, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Naoki Hiji, Shigeru Yamamoto
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Patent number: 7658998Abstract: The present invention relates to a method for preparing an injectable composition of microparticles for the sustained release of a biologically active agent. The microparticles include a biocompatible polymer and a biologically active agent. The invention provides an improved process for the preparation of microparticles, wherein the physical characteristics of the microparticles, for example, the morphology, density and size, are independent of the process used to prepare the initially formed polymer/drug matrix. The method includes the steps of (a) providing a polymer/biologically active agent matrix; (b) compressing the polymer/biologically active agent matrix, thereby forming a compressed matrix; and (c) fragmenting the compressed matrix, thereby forming an injectable microparticle composition. The polymer/drug matrix can be provided by any suitable method.Type: GrantFiled: January 21, 2004Date of Patent: February 9, 2010Assignee: Alkermes Controlled Therapeutics, Inc.Inventors: Josiah Brown, Warren E. Jaworowicz, Gregory C. Troiano
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Publication number: 20090311336Abstract: A particle having an average diameter from 80 to 500 nm and having a core containing at least one compound having a ?max in the range from 250 to 400 nm and a cross-linked polymeric shell.Type: ApplicationFiled: June 9, 2009Publication date: December 17, 2009Inventors: Charles Elwood Jones, Morris Christopher Wills
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Patent number: 7629049Abstract: A polymer system and device with a hemocompatible film or coated polymers is provided, the polymer system comprises an organic phase and an aqueous phase, the organic phase comprises polymerizable monomers and at least one initiator and the aqueous phase comprises at least one dispersing agent, at least one free radical inhibitor and at least one buffering agent, the organic phase is immiscible in the aqueous phase, and the dispersing agent forms a hemocompatible surface on the polymer, and the device comprises a housing for containing the polymer system.Type: GrantFiled: February 26, 2007Date of Patent: December 8, 2009Assignee: Medasorb, Inc.Inventors: Robert L. Albright, Vincent J. Capponi, Thomas D. Golobish
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Publication number: 20090291309Abstract: The present invention relates to aminoplast-membrane single-core or multi-core microcapsules whose core is comprised of at least two organic and/or inorganic compounds. The invention also relates to methods of preparing said microcapsules.Type: ApplicationFiled: November 30, 2005Publication date: November 26, 2009Inventors: Fabien Salaün, Eric Devaux, Serge Bourbigot, Pascal Rumeau
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Patent number: 7588780Abstract: Embolic polymer particles are described.Type: GrantFiled: August 9, 2002Date of Patent: September 15, 2009Assignee: Boston Scientific Scimed, Inc.Inventors: Marcia Buiser, Marc Bellisario, David Knapp, Stephan Mangin, Janel Lanphere
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Patent number: 7572397Abstract: Microcapsules comprising one or more lipophilic substances as core material and a polymer as capsule shell, which are obtainable by free-radical polymerization of an oil-in-water emulsion comprising from 30 to 100% by weight, based on the total weight of the monomers, of one or more C1-C24-alkyl esters of acrylic and/or methacrylic acid (monomer I), from 0 to 80% by weight, based on the total weight of the monomers, of a bifunctional or polyfunctional monomer (monomers II) which is insoluble or sparingly soluble in water and from 0 to 40% by weight, based on the total weight of the monomers, of other monomers (monomers III), the lipophilic substance and solid inorganic particles having a mean particle size of from 45 to 1000 nm, and a process for producing them are described. They can be used in binding building materials, textiles and gypsum plasterboard.Type: GrantFiled: November 25, 2002Date of Patent: August 11, 2009Assignee: BASF AktiengesellschaftInventors: Ekkehard Jahns, Hans-Juergen Denu, Joachim Pakusch, Horst Seibert
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Patent number: 7541060Abstract: Disclosed is a technique for producing bichromal balls that are adapted for use in high temperature applications. The bichromal balls find particular application in signs and display devices that can be used in environments in which the temperature exceeds 40° C.Type: GrantFiled: August 17, 2004Date of Patent: June 2, 2009Assignee: Xerox CorporationInventors: San-Ming Yang, Thomas Edward Enright, Aurelian Valeriu Magdalinis, Ahmed Abd Alzamly, Man-Chung Tam, Carol Ann Jennings, Peter M. Kazmaier, Marko D. Saban, Michael Steven Hawkins
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Patent number: 7527809Abstract: A structure containing polyhydroxyalkanoate and a magnetic substance includes an external phase part containing polyhydroxyalkanoate and an internal phase part contained in the external phase part, at least one of the external phase part and the internal phase part containing a magnetic substance. Accordingly, provided is a microcapsule, which can be suitably used for formation of an active ingredient of a sustained release pharmaceutical preparation or an ultrasonic contrast agent.Type: GrantFiled: April 30, 2004Date of Patent: May 5, 2009Assignee: Canon Kabushiki KaishaInventors: Tetsuya Yano, Tsuyoshi Nomoto, Shinya Kozaki, Takeshi Imamura, Tsutomu Honma
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Patent number: 7521085Abstract: A coating composition is prepared by polymerizing an addition polymer with a Tg of at least about 60° C. in the presence of a particulate pigment having substantially primary aggregate particles to form encapsulated pigment particles, isolating and drying the encapsulated pigment product, and combining the dried encapsulated pigment product with a coating vehicle.Type: GrantFiled: December 21, 2005Date of Patent: April 21, 2009Assignee: BASF CorporationInventors: Jon R. Hall, Zenon Paul Czornij
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Patent number: 7517587Abstract: The invention relates to macromolecules auto-assembled and photopolymerised around carbon nanotubes. Said macromolecules are essentially formed from rings of lipid compounds, polymerised about the nanotubes, said polymerised compounds being obtained from lipid molecules with one or two chains A, bonded to a group Z where A is a chain, CH3—(CH2)m—C?C—C?C—(CH2)n—, where n and m, independently=whole numbers from 1 to 16 and Z is a polar head group embodied by a —COOH, —CO—NH—Y, —NH2 or N+(R)3, where R is an alkyl with C1, to C4 and Y is a —(CH2)4—C(R1)—N(CH2—COOH)2 group with R=H, or a COOH group, where A is a single lipid chain or a group of structure (I) or (II), where R2=a COOH, or —CO—NH—Y1 group with Y1=a —(CH2)4—C (R3)—N(CH2COOH)2 group with R3=H or a COOH group, where Z and R2 can also be neutral polar head groups of the sugar or polysaccharide type.Type: GrantFiled: April 13, 2004Date of Patent: April 14, 2009Assignees: Centre National de la Recherche Scientifique (C.N.R.S.), Universite Louis PasteurInventors: Charles Mioskowski, Stéphane Rickling, Patrick Schultz
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Publication number: 20090092837Abstract: The present invention relates to magnetic beads in the form of composite beads with an inner core of metal particles, which are coated with an inert synthetic polymer and thereafter a hydrophilic porous polymer, preferably dextran. This provides porous biocompatible beads without metal leakage. This construction also allows for simple and convenient handling of cell expansion media by magnetism.Type: ApplicationFiled: March 20, 2007Publication date: April 9, 2009Applicant: GE HEALTHCARE BIO-SCIENCES ABInventors: Andreas Axen, Eva Holmgren, Nils Norrman, Tobias E. Soderman
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Publication number: 20090075856Abstract: A shelf-stable liquid agent or detergent containing a bleaching agent in the form of a finely particulate bleaching agent encapsulated in a crosslinkable polymer matrix.Type: ApplicationFiled: November 19, 2008Publication date: March 19, 2009Applicant: Henkel AG & Co. KGaAInventors: Peter Schmiedel, Heinz-Juergen Voelkel, Heribert Kaiser, Wolfgang von Rybinski, Soeren Hoelsken, Volker Blank, Bernhard Guckenbiehl
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Publication number: 20090062462Abstract: An object of the present invention is to provide an encapsulated product having excellent properties, for example, the core substance is not limited. An encapsulated product comprising a core substance encapsulated with a wall material mainly comprising a polymer, wherein the polymer contacts the core substance through an ionic surfactant a and comprises at least (1) a repeating structural unit derived from an ionic polymerizable surfactant B and/or ionic monomer and (2) a repeating structural unit derived from an ionic polymerizable surfactant C having an electric charge the same as or opposite the electric charge of the ionic surfactant; or an encapsulated product comprising a core substance encapsulated with a wall material mainly comprising a polymer, wherein the polymer comprises a repeating structural unit comprising a hydrophobic monomer and is present between (1) an ionic surfactant b and (2) an ionic surfactant c.Type: ApplicationFiled: October 18, 2005Publication date: March 5, 2009Inventor: Toshiyuki Miyabayashi
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Patent number: 7488513Abstract: A method of producing microcapsules having an electrophoretic particle dispersion encapsulated comprises the steps of: emulsifying and dispersing a hydrophobic dispersion having electrophoretic particles dispersed in a hydrophobic medium by using a high-speed rotating stirring apparatus wherein the circumferential speed at the end of a stirring part is 2 m/s to 90 m/s, and the distance (a) between the end of the stirring part and that immobile part of the stirring apparatus which is nearest to the end of the stirring part is 0 mm<(a)<20 mm; and forming microcapsules of the emulsified and dispersed hydrophobic dispersion under stirring with a stirring blade.Type: GrantFiled: March 20, 2003Date of Patent: February 10, 2009Assignee: Toyo Ink Mfg. Co., Ltd.Inventors: Yoshiyuki Sakai, Kazuhiro Jonai, Toshiyuki Uemura
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Publication number: 20090017304Abstract: An organic-inorganic composite particle containing an inorganic particle having a plurality of polymer particles attached to the inorganic particle and a polymer layer encapsulating the attached polymer particles. A process is provided for the organic-inorganic composite particle. The organic-inorganic composite particle is useful in the preparation of dried coatings that have improved hiding, whiteness, or gloss.Type: ApplicationFiled: September 15, 2008Publication date: January 15, 2009Inventors: Anne Denise Koller, Robert Mitchell Blankenship
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Patent number: 7473467Abstract: The invention relates to a complex coacervation process based on the use of type B gelatin as polycationic colloid, for the preparation of “Halal” certified flavor-containing microcapsules.Type: GrantFiled: September 3, 2002Date of Patent: January 6, 2009Assignee: Firmenich SAInventors: Anandaraman Subramaniam, Anne Reilly
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Patent number: 7442410Abstract: A process for the microencapsulation of phase transitional paraffin compounds is described. Polypropylene glycols with the average molecule weight over 400 were used as the surface tension modifiers for emulsifying the paraffin compounds. Polyisocyanates capable of being dissolved in the phase change materials were employed to promote the deposition of melamine, partially methylolated melamine and the precondensate of melamine-formaldehyde onto the hydrophobic droplets for the microencapsulation. The prepared emulsion of microencapsulated phase change materials was successfully coated on textile fabrics and the coated products showed improved thermal regulation function.Type: GrantFiled: December 24, 2002Date of Patent: October 28, 2008Assignee: Nano-Sports Technologies Ltd.Inventors: Jianwei Xing, Yi Li, Edward Newton
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Publication number: 20080261805Abstract: Photocatalytic titanium dioxide particles are disclosed having improved dispersibility into an aqueous solvent not only under neutral physiological conditions in vivo but also over a wide pH range, and improved cell affinity and cell uptake property. The photocatalytic titanium dioxide particles comprise particles comprising photocatalytic titanium dioxide and a cationic hydrophilic polymer modifying surfaces of the photocatalytic titanium dioxide particles, wherein the hydrophilic polymer is bonded to the photocatalytic titanium dioxide particles. The photocatalytic titanium dioxide particles are very useful for medical applications, such as destruction of cancer cells.Type: ApplicationFiled: March 27, 2006Publication date: October 23, 2008Applicant: TOTO LTD.Inventors: Koki Kanehira, Shuji Sonezaki, Yumi Ogami, Toshiaki Banzai, Junji Kameshima
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Publication number: 20080258115Abstract: Nanoparticles and methods of making nanoparticles are provided. The nanoparticles may include semiconductor nanocrystals. A shell may encapsulate a nanoparticle core, and the shell may include non-organic material and may be silica. The shell may also include additional species such as PEG. In some embodiments, a passivation layer is in contact with the core.Type: ApplicationFiled: June 23, 2008Publication date: October 23, 2008Applicant: Singapore Agency for Science, Technology and ResearchInventors: Jackie Y. Ying, Subramanian T. Selvan, Timothy T. Tan
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Patent number: 7153754Abstract: Methods for forming porous insulative materials for use in forming dielectric structures of semiconductor devices are disclosed. Each insulative material may include a first, substantially nonporous state and a second, porous state. When in the first state, the insulative materials may be processed or support layers or structures which are being processed. When in the second state, the insulative materials have a reduced dielectric constant and, thus, increased electrical insulation properties. Semiconductor device structures including layers or other features formed from one of the insulative materials are also disclosed. Methods for forming the insulative material and for causing the insulative material to become porous are also disclosed.Type: GrantFiled: August 29, 2002Date of Patent: December 26, 2006Assignee: Micron Technology, Inc.Inventors: Warren M. Farnworth, Tongbi Jiang
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Patent number: 7115303Abstract: A process for producing spherical composite cured melamine resin particles excellent in water resistance, in which colloidal silica is localized near the surface thereof, comprising (a) a step of reacting a melamine compound with an aldehyde compound in an aqueous medium under a basic condition in the presence of a suspension of colloidal silica having an average particle size of 5 to 70 nm to produce an aqueous solution of a precondensate of water-soluble melamine resin; and (b) a step of adding an acid catalyst to the aqueous solution produced in the step (a) to separate out spherical composite cured melamine resin particles.Type: GrantFiled: July 11, 2003Date of Patent: October 3, 2006Assignee: Nissan Chemical Industries, Ltd.Inventors: Masaaki Ozawa, Akira Yoshida
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Patent number: 7112620Abstract: A polymer system with a hemocompatible film or coating is provided, the system comprises an organic phase and an aqueous phase, the organic phase comprises polymerizable monomers and at least one initiator and the aqueous phase comprises at least one dispersing agent, at least one free radical inhibitor and at least one buffering agent, the organic phase is immiscible in the aqueous phase, and the dispersing agent forms a hemocompatible surface on the polymer.Type: GrantFiled: May 27, 2003Date of Patent: September 26, 2006Inventor: Robert L. Albright
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Patent number: 7067324Abstract: The present invention provides a method for reducing undesirable light emission from a sample using at least one photon producing agent and at least one photon reducing agent (e.g. dye-based photon reducing agents). The present invention further provides a method for reducing undesirable light emission from a sample (e.g., a biochemical or cellular sample) with at least one photon producing agent and at least one collisional quencher. The present invention also provides a method for reducing undesirable light emission from a sample (e.g., a biochemical or cellular sample) with at least one photon producing agent and at least one quencher, such as an electronic quencher. The present invention also provides a system and method of screening test chemicals in fluorescent assays using photon reducing agents. The present invention also provides compositions, pharmaceutical compositions, and kits for practicing these methods.Type: GrantFiled: January 12, 2001Date of Patent: June 27, 2006Assignee: Invitrogen CorporationInventors: Tom Knapp, Gregor Zlokarnik, Paul Negulescu, Roger Y. Tsien, Tim Rink
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Patent number: 7033639Abstract: A coating composition including a polyaniline particle and a binder is provided. The polyaniline particle contains a core polymer particle with strong acid groups and an attached polyaniline polymer, and has a particle diameter in a select range. Coatings prepared from the coating composition may be employed to provide corrosion resistance to metal substrates. A process for preparing the polyaniline particle and an article including a coating prepared from the coating composition are also provided.Type: GrantFiled: April 19, 2002Date of Patent: April 25, 2006Assignee: Rohm and Haas CompanyInventors: Michael DeWayne Kelly, Thomas Glenn Madle, Paul Ralph Van Rheenen
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Patent number: 6964836Abstract: A process for forming photosensitive microcapsules having discrete capsule walls comprising the steps of forming an emulsion of an oily core material in a continuous aqueous phase containing a carboxyvinyl polymer and enwrapping particles of the oily core material in an amine-formaldehyde condensation product produced by in situ condensation of an amine and formaldehyde wherein the carboxyvinyl polymer comprises a crosslinked polymer of acrylic acid is disclosed.Type: GrantFiled: March 15, 2002Date of Patent: November 15, 2005Assignee: Eastman Kodak CompanyInventors: Ibrahim Katampe, Alexander Y. Polykarpov, Joseph C. Camillus
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Patent number: 6916640Abstract: A multi-layered microcapsule has an inner extracellular matrix and an outer shell. The inner extracellular matrix includes a first inner layer of biopolymer and a second intermediate layer of polymer that provides partial immune-protection and holds the first layer in place. The outer shell can form an exoskeleton to provide mechanical stability. Each of the individual layers can be varied to optimize mechanical stability, cell function, and immuno-protection.Type: GrantFiled: October 12, 2001Date of Patent: July 12, 2005Assignees: Agency for Science, Technology and Research, National University of SingaporeInventors: Hanry Yu, Kam W. Leong, Ser-Mien Chia, Andrew C. A. Wan
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Patent number: 6913825Abstract: Nanoparticles, nanocomposites, and methods for making the nanoparticles and nanocomposites are disclosed. Illustrated methods include preparing a nanocomposite particle by binding a silicate compound to the surface of a core particle in an aqueous suspension, adding a silicate source and an organic surfactant template, and stirring the aqueous suspension to obtain silicate growth.Type: GrantFiled: September 20, 2002Date of Patent: July 5, 2005Assignee: University of Notre Dame du LacInventors: Agnes E. Ostafin, Robert Nooney, Edward Maginn
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Patent number: 6890592Abstract: The present invention teaches an improved process for preparing a population of microcapsules having a substantially uniform size distribution, especially useful for manufacture of carbonless paper. The improved process teaches use of membrane material having a pre-selected pore size in the capsule manufacture process. A core material is provided along with a receiving solution for receiving the core material. The receiving solution is a nonsolvent for the core material. The core material is passed under pressure through the membrane into a moving or turbulent receiving solution forming uniform droplets of core material dispersed in the receiving solution. Wall-forming material is added to the receiving solution for coating the core material droplets. The coating on the droplets is polymerized forming microcapsules. This novel process also lends itself to microcapsule formation in a continuous process.Type: GrantFiled: March 13, 2002Date of Patent: May 10, 2005Assignee: Appleton Papers Inc.Inventors: Troy Ronald Seehafer, George Arthur Stahler
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Patent number: 6884829Abstract: A polymer with a hemocompatible film or coating is manufactured by a one-step method comprising polymerizing monomer droplets comprising at least one crosslinking agent to form a polymer and simultaneously coating the resulting polymer using at least one dispersing agent to thereby form a hemocompatible coated polymer.Type: GrantFiled: October 18, 2002Date of Patent: April 26, 2005Inventor: Robert L. Albright
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Patent number: 6881810Abstract: A microcapsule which includes a polymer as a capsule wall of the microcapsule, in which the polymer is obtained by polymerizing a dendritic branching molecule having a hydroxyl group in a terminal thereof, an isocyanate compound, and a compound having two or more active hydrogen atoms in a molecule thereof. A process for manufacturing a microcapsule includes the step of polymerizing an isocyanate compound, a dendritic branching molecule having a hydroxyl group in a terminal thereof, and a compound having two or more active hydrogen atoms in a molecule thereof, so as to form a capsule wall of the microcapsule.Type: GrantFiled: July 11, 2003Date of Patent: April 19, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuki Matsunami, Shintaro Washizu
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Patent number: 6861064Abstract: A novel method of encapsulating an active substance in a biodegradable polymer, which comprises: a) dissolving said biodegradable polymer in an organic solvent therefor; b1) dispersing said active substance in the organic solution obtained in step a) to provide a dispersion with the active substance as the inner phase thereof; or alternatively b2) emulsifying said active substance, dissolved in water or other aqueous solvent therefor, in the organic solution obtained in step a) to provide an emulsion with the active substance as the inner aqueous phase thereof; and c) subjecting the dispersion obtained in step b1), or alternatively the emulsion obtained in step b2), to an encapsulation operation with an aqueous polyethylene glycol solution as a continuous phase to provide micro- or nanoparticles having the active substance encapsulated therein. Sustained release particles obtainable thereby.Type: GrantFiled: September 24, 1998Date of Patent: March 1, 2005Assignee: Jagotec AGInventors: Timo Laakso, Mats Reslow
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Publication number: 20040265589Abstract: A microcapsule in which a capsule wall of the microcapsule comprises a first polymer component. A surface of the capsule wall is modified with a second polymer component that is formed from a monomer having an ethylenic unsaturated bond.Type: ApplicationFiled: April 23, 2004Publication date: December 30, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Satoru Yamada, Yuuichi Fukushige, Kyoko Senga, Naoto Yanagihara
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Publication number: 20040121072Abstract: A process for the microencapsulation of phase transitional paraffin compounds is described. Polypropylene glycols with the average molecule weight over 400 were used as the surface tension modifiers for emulsifying the paraffin compounds. Polyisocyanates capable of being dissolved in the phase change materials were employed to promote the deposition of melamine, partially methylolated melamine and the precondensate of melamine-formaldehyde onto the hydrophobic droplets for the microencapsulation. The prepared emulsion of microencapsulated phase change materials was successfully coated on textile fabrics and the coated products showed improved thermal regulation function.Type: ApplicationFiled: December 24, 2002Publication date: June 24, 2004Inventors: Jianwei Xing, Yi Li, Edward Newton
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Patent number: 6753083Abstract: A particulate composition comprising particles having a core comprising a hydrophobic polymer within a shell, characterised in that the shell comprises a semi-permeable membrane. Particulate composition can be used for making a stable dispersion of particles uniformly distributed throughout a first hydrophobic liquid, wherein the particles comprise a core within a shell and the core comprises a hydrophobic polymer into has been imbibed a second hydrophobic liquid, Compositions can be used to encapsulate active substances and may be used in sustained release mechanisms.Type: GrantFiled: October 18, 2001Date of Patent: June 22, 2004Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Kishor Kumar Mistry, Janine Andrea Preston, Kenneth Charles Symes
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Patent number: 6746684Abstract: A microcapsule characterized by comprising a solid pesticide as a core material coated with a wall material which is a resin formed by polycondensation of a sparingly water-soluble melamine-formaldehyde resin type prepolymer (said sparingly water-soluble melamine-formaldehyde resin type prepolymer dissolves 2000 g or less of water therein per 100 g of solid component of the prepolymer at +25° C.) in the presence of a dispersant which is a condensation product of naphthalenesulfonic acid and/or alkylnaphthalenesulfonic acid and formaldehyde or a salt thereof, a method for producing said microcapsule, and a method for applying said microcapsule are disclosed.Type: GrantFiled: October 15, 2001Date of Patent: June 8, 2004Assignee: Syngenta Crop Protection, Inc.Inventors: Kenichi Kitagaki, Hironori Kataoka
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Patent number: 6737108Abstract: A process for producing a MC-type conductive filler includes treating minute metallic particles with a coupling agent, preparing an oil phase of the coupling agent-treated minute metallic particles and a reactive substance A, the reactive substance A directly contacting the metallic particles. Then, an aqueous phase is prepared having a reactive substance B, which is capable of reacting with the reactive substance A, dissolved in water. Thereafter, the oil phase is dispersed in the aqueous phase to form a suspension. In situ reaction of the reactive substances A and B is then caused by applying heat to the suspension or adding a catalyst to the suspension. This forms a coating of a thermosetting insulating resin on the surface of the minute metallic particles. Alternatively, the reactive substance B may not be used.Type: GrantFiled: May 14, 2002Date of Patent: May 18, 2004Assignee: Fujitsu LimitedInventors: Hiroaki Date, Makoto Usui, Isao Watanabe, Yuko Hozumi
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Patent number: 6719932Abstract: Disclosed are a plurality of particles having a narrow particle size distribution, a processes for forming the same, and films containing the same. The plurality of particles, includes one or more discrete polymer shells, wherein at least one of the polymer shells is crosslinked with at least one monomer containing two or more double bonds polymerizable by free radical means; and a core material encased in the polymer shells, wherein the plurality of particles have a polydispersity of from 1.3 to 1.0.Type: GrantFiled: September 24, 2002Date of Patent: April 13, 2004Assignee: Shipley Company, L.L.C.Inventors: Richard Roy Clikeman, Morris Christopher Wills, Katerina Elizabeth Dukes
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Patent number: 6632531Abstract: A method of forming, by polymerization in an aqueous dispersion at pressures in excess of one atmosphere, a plurality of porous particles having at least one polymeric phase and, additionally, having a pore filling phase containing a fugitive substance is disclosed. Replacement of the fugitive substance with a gas is further disclosed. Gas-filled porous particles and their aqueous dispersions are also disclosed.Type: GrantFiled: December 13, 2001Date of Patent: October 14, 2003Assignee: Rohm and Haas CompanyInventor: Robert Mitchell Blankenship
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Patent number: 6630197Abstract: The present invention relates to the field of degradation or corrosion prevention or inhibition through the use of bacteria which secrete antimicrobial chemical compositions. In particular, the invention relates to the use of bacteria which, either naturally or through the use of recombinant technology, secrete chemical compositions which inhibit the growth of sulfate-reducing bacteria on metals, concrete, mortar, and other surfaces subject to corrosion.Type: GrantFiled: March 31, 1999Date of Patent: October 7, 2003Assignee: Regents of the University of CaliforniaInventors: Thomas K. Wood, Arul Jayaraman, James C. Earthman
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Patent number: 6596204Abstract: A process of micro-encapsulating a volatile liquid includes selecting a volatile liquid, such as Isophorone, and porous ceramic particles for encapsulating the volatile liquid. The volatile liquid and porous particles are mixed and a vacuum is applied to the mixture to impregnate the volatile liquid in the porous particles. A polymer catalyst for the polymer resin, such as an epoxy catalyst for use with an epoxy resin, is mixed with the volatile liquid and porous particles to saturate the particles. The polymer resin, such as epoxy resin, is added to the mixture for forming a resin cured shell around the porous particle holding the volatile liquid to form a microencapsulated volatile liquid. The resin is only cured on the outer shell of the porous particle when coming in contact with the catalyst supported with the volatile liquid in the porous particle.Type: GrantFiled: May 15, 2002Date of Patent: July 22, 2003Inventor: Phillip G. Landers
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Publication number: 20030055115Abstract: A water-based ink for ink-jet printing, comprising colored particles containing: (a) a core particle having a colorant; and (b) a shell having a resin and encapsulating the core particle, wherein the resin comprises a monomer unit having a hydroxyl group in an amount of 0.1 to 50 weight % based on the total weight of the shell.Type: ApplicationFiled: September 6, 2002Publication date: March 20, 2003Inventors: Hidetaka Ninomiya, Hiroaki Ando
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Patent number: 6531519Abstract: A method of preventing the growth of heterotrophic bacteria and the subsequent establishment of a biofilm on the surface and in the micropores of an antimicrobial synthetic ion exchange resin. An antimicrobial synthetic ion exchange resin that prevents the growth of heterotrophic bacteria and the subsequent establishment of biofilm on the surface and in the micropores of the resin. A broad spectrum organic antimicrobial agent that is water insoluble and thus precipitates out and becomes encapsulated within micropores of the resin during suspension polymerization. The antimicrobial agent is submicron sized and has a high surface area. The antimicrobial agent protects the antimicrobial synthetic ion exchange bead from the growth of heterotrophic bacteria and the subsequent establishment of biofilm on the surface and in the micropores of the resin. The antimicrobial agent is nontoxic, noncarcinogenic, substantially nonleaching and durable over the lifespan of the bead.Type: GrantFiled: December 8, 2000Date of Patent: March 11, 2003Assignee: Microban Products CompanyInventor: Arvind S. Patil
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Patent number: 6503559Abstract: The present invention relates to colorant compositions containing neonanoplasts. The colorant compositions exhibit improved color brightness and brilliance due to the incorporation of one or more colorants in the neonanoplasts. The colorant compositions may be printed onto virtually any substrate. The colorant compositions of the present invention have particular utility in the area of printed textiles.Type: GrantFiled: June 3, 1999Date of Patent: January 7, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Ronald Sinclair Nohr, John Gavin MacDonald
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Patent number: 6500447Abstract: The present invention provides pH-sensitive micro-capsules, compositions containing them, methods for their preparation and methods for their use.Type: GrantFiled: August 13, 1999Date of Patent: December 31, 2002Assignee: BASF AktiengesellschaftInventors: Robin William Dexter, Brian Eric Benoff
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Patent number: 6486099Abstract: A microcapsule (or microencapsulated product) having a uniform and smooth coating film and also an excellent performance of gradually liberating the content material is produced at a good particle size distribution while suppressing the occurrence of isolated or aggregated film material, aggregated microcapsules and isolated core material. The production process includes: a first coating step of mixing a water-soluble cationic amino resin and an anionic surfactant in the presence of a hydrophobic core material dispersed in an aqueous medium to coat the dispersed core material with a coacervate of the cationic amino resin and the anionic surfactant; and a second coating step of adding an amino resin prepolymer into an aqueous dispersion liquid containing the coated dispersed core material and polycondensating the amino resin prepolymer to further coat the coated dispersed core material with a polycondensate of the amino resin prepolymer.Type: GrantFiled: January 12, 2001Date of Patent: November 26, 2002Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Yutaka Igari, Yuzi Hori, Tsuneo Okamoto