Reactant Or Catalyst Is Material Encapsulated Or Impregnated Patents (Class 523/211)
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Patent number: 5843251Abstract: An adhesive film comprising (a) a liquid epoxy resin, (b) a solid resin having one or more functional groups, (c) a microcapsule type curing agent, and if necessary (d) a coupling agent, is effective for connecting semiconductor chips and wiring boards under heat and pressure.Type: GrantFiled: March 20, 1992Date of Patent: December 1, 1998Assignee: Hitachi Chemical Co., Ltd.Inventors: Isao Tsukagoshi, Yutaka Yamaguchi, Atsuo Nakajima, Yasushi Goto
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Patent number: 5844033Abstract: A polycarbonate resin composition comprising substantially:94.0-99.5% by weight of a polycarbonate resin, and0.5-6.0% by weight of zeolite having tannic acid adsorbed thereon.In this polycarbonate resin composition, the molecular weight reduction of polycarbonate resin is suppressed.Type: GrantFiled: July 7, 1997Date of Patent: December 1, 1998Assignee: Tohoku Munekata Co., Ltd.Inventors: Susumu Nikkeshi, Toru Masuko, Akiko Tominaga
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Patent number: 5834536Abstract: The invention relates to a process for producing immobilized polysulphide silanes, characterized by the conversion of a halogenated alkyl silane (A), optionally in the presence of a further organic halogen compound (B), with a polysulphide (C) in the presence of water and an inorganic or organic carrier material, wherein the content of the carrier material in the (dried and water-insoluble) end product is 20 to 99.5 wt. %.The immobilized polysulphide silanes are used for producing rubber mixtures and vulcanisates, particularly for tires, which have a low rolling resistance and an enhanced thermal load capacity.Type: GrantFiled: August 7, 1996Date of Patent: November 10, 1998Assignee: Bayer AGInventor: Thomas Scholl
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Patent number: 5814370Abstract: A dried gel material sterically entrapping nanoclusters of a catalytically active material and a process to make the material via an inverse micelle/sol-gel synthesis. A surfactant is mixed with an apolar solvent to form an inverse micelle solution. A salt of a catalytically active material, such as gold chloride, is added along with a silica gel precursor to the solution to form a mixture. To the mixture are then added a reducing agent for the purpose of reducing the gold in the gold chloride to atomic gold to form the nanoclusters and a condensing agent to form the gel which sterically entraps the nanoclusters. The nanoclusters are normally in the average size range of from 5-10 nm in diameter with a monodisperse size distribution.Type: GrantFiled: June 11, 1996Date of Patent: September 29, 1998Assignee: Sandia CorporationInventors: Anthony Martino, Stacey A. Yamanaka, Jeffrey S. Kawola, Steven K. Showalter, Douglas A. Loy
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Patent number: 5789494Abstract: Methods and compositions for encapsulated polymeric gels swollen with nonaqueous reactive materials are provided. The methods include gel synthesis, swelling of a gel precursor with a first nonaqueous reactive material, and encapsulation of the swollen gel with a second nonaqueous reactive material. Gels precursors may be synthesized from crosslinking polymers, or alternatively, may be formed by crosslinking and polymerizing a monomer starting material. An accelerator may be utilized to facilitate swelling of the gel precursor with the first nonaqueous reactive material. Foams and composites may also be swollen with the first nonaqueous reactive material. The swollen gel is then contacted with a second nonaqueous reactive material such that an encapsulation layer is formed thereby. The encapsulated gels may be stored for subsequent use.Type: GrantFiled: June 7, 1995Date of Patent: August 4, 1998Assignee: Medlogic Global CorporationInventors: Barry Joseph Hand, E. C. Lupton, Jr., Lev Bromberg, Xiaohong Yu
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Patent number: 5741592Abstract: A coating formulation which forms a heat sensitive coating and a thermal recording material with such a coating are disclosed. The heat sensitive coating shows improved prerecording shelf life and improved record stability and consists of microcapsules containing a solid blend of dye and sensitizer, with the exterior of the capsules consisting of color developer and other coating materials such as pigment, binder and additives. Application of heat during printing renders the microcapsule walls permeable to the dye resulting in color development upon reaction of the dye and color developer.Type: GrantFiled: December 20, 1995Date of Patent: April 21, 1998Assignee: NCR CorporationInventors: Maurice W. Lewis, John C. Rosenbaum, Albert J. Herbert, Pankaj Attri
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Patent number: 5731134Abstract: Stable photographic coating compositions comprising a polymer latex are prepared by mixing an aqueous solution comprising gelatin with a latex dispersion of a polymer of the formula(A).sub.x (B).sub.y (C).sub.zwhereA and B are formed from nonionic monomers,C is formed from anionic monomers, andx, y and z are monomer weight fractions where x=0 to 1.0, y=0 to 1.0, x+y=about 0.98 to 1.0, and z=0 to about 0.02,wherein A, B, x and y are such that latex dispersions of polymers of the formula (A).sub.x (B).sub.y have calcium ion critical coagulation concentrations of less than 80 mM Ca.sup.+2 in gelatin solutions,wherein the gelatin of the aqueous solution mixed with the latex dispersion comprises a gelatin of low calcium ion content such that the coating composition has a calcium Ca.sup.2+ concentration of less than 2 mM. The method of the invention allows for the preparation of aqueous gelatin coating solutions comprising latex dispersions of polymers which are unstable in the presence of calcium ions.Type: GrantFiled: February 9, 1996Date of Patent: March 24, 1998Assignee: Eastman Kodak CompanyInventors: James Stephen Honan, John Bruce Walters, Thomas Haile Whitesides
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Patent number: 5731366Abstract: A plugging compound for chemical fastening technology is based on a free-radically polymerizable resin and a free-radical initiator spatially separated therefrom. The plugging compound in question is a self-supporting and storage-stable material which can be inserted in that form directly into a drill-hole.Type: GrantFiled: October 13, 1995Date of Patent: March 24, 1998Assignees: DSM Resins B.V., Hilti AGInventors: Monika Moench, Peter Mauthe, Fritz Ziegert, Stefan Schwiegk
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Patent number: 5726222Abstract: Disclosed is a microcapsule-type curing agent comprising (A) a curing agent for a thermosetting resin and (B) a thermoplastic resin dissolvable to the thermosetting resin by heating. The microcapsule-type curing agent is formed as a particle-like material in which the component (A) is coated with a layer whose main constituent is the component (B) and the mean particle diameter of which is in the range of 0.1 to 20 .mu.m. By using the microcapsule-type curing agent, a thermosetting resin composition and a prepreg which are good in storage stability at a room temperature and excellent in thermal resistance of a cured product made therefrom can be obtained. Further, a fiber reinforced composite material obtained using this thermosetting resin composition is excellent in curing uniformity and thermal resistance.Type: GrantFiled: April 7, 1997Date of Patent: March 10, 1998Assignee: Toray Industries, Inc.Inventors: Ryuji Sawaoka, Shinji Kouchi, Toshio Muraki
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Patent number: 5719205Abstract: Synthetic resin particles having a hydrogen bond forming group are swollen, at least one metallic compound capable of forming a hydrogen bond is introduced into the synthetic resin particles, and the metallic compound is hydrolyzed and condensed within the synthetic resin particles and on and in the vicinity of the surface of the synthetic resin particles. An inorganic component is grown by this reaction, and at least part of the grown inorganic component 3 is fixed through a reaction with a hydrogen bond forming group present within the synthetic resin particles 1 and on and in the vicinity of the surface of the synthetic resin particles 1 to prepare a coating composition. The coating composition is coated on the surface of a substrate, and the resulting coating is dried at a temperature of the lowest film forming temperature or above to form a coating.Type: GrantFiled: January 13, 1995Date of Patent: February 17, 1998Assignee: Dai Nippon Printing Co., Ltd.Inventor: Toshio Yoshihara
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Patent number: 5668225Abstract: An oil-bleeding waterproof sealer for a connector comprising a vulcanized and molded article of a composition comprising: (A) 100 parts by weight of a diorganopolysiloxane green rubber containing at least two alkenyl groups bonded to silicon atoms per molecule thereof, (B) from 10 to 100 parts by weight of a reinforcing filler, (C) from 0.1 to 10 parts by weight of an organohydrogenopolysiloxane having at least two hydrogen atoms bonded to silicon atoms per molecule thereof, (D) from 1 to 30 parts by weight of a phenyl-containing diorganopolysiloxane having a viscosity of 1 to 3,000 cSt at 25.degree. C., and (E) a catalytic amount of a catalyst for hydrosilylation having a particle size of 0.01 to 20 .mu.m, which comprises a platinum catalyst and a non-silicone series thermoplastic resin having a glass transition point of 50.degree. to 200.degree. C., with the proportion of metallic platinum in the catalyst for hydrosilylation being 0.01 to 5% by weight.Type: GrantFiled: December 30, 1996Date of Patent: September 16, 1997Assignee: Yazaki CorporationInventors: Kiyotaka Okazaki, Sinichi Kogure, Masahiro Kanda, Shiroh Kobayashi
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Patent number: 5654081Abstract: In a method of producing an integrated circuit assembly, an IC device is metallurgically bonded to a supporting substrate. The mounting of the IC device to the substrate also includes a polymeric underfill body adhesively bonding the IC device to the substrate. The polymeric underfill body is formed of a curable underfill composition comprising epoxy resin, anhydride curing agent for the epoxy resin, amine catalyst and a minor amount of an additional component selected from alkyl-substituted imidazole and phenyl-substituted imidazole. Such additional component may act as a catalyst, as used with an amine catalyst known catalyst for the polymerization reaction of the epoxy resin with the anhydride curing agent, may act as a co-catalyst. The polymeric underfill body has improved glass transition temperature values and improved coefficient of thermal expansion values to provide good thermal stress cycling life for the integrated circuit assembly.Type: GrantFiled: July 5, 1995Date of Patent: August 5, 1997Assignee: Ford Motor CompanyInventor: Michael G. Todd
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Patent number: 5635546Abstract: A curable composition, having utility for threadlocking engageable members of a threaded mechanical fastener, comprising: a reactive silicone (meth)acrylate emulsified in an aqueous medium, optionally further comprising a polymerizable non-silicone (meth)acrylate monomer or oligomer; and a microencapsulated peroxy initiator which is initiatingly effective for cure of the reactive silicone (meth)acrylate.Type: GrantFiled: February 22, 1996Date of Patent: June 3, 1997Assignee: Loctite CorporationInventors: Richard D. Rich, Eerik Maandi, Paula M. Gontarz, Hsien-Kun Chu
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Patent number: 5624977Abstract: Provided is a thermoplastic fluorosilicone resin of the average compositional formula (1):(RfCH.sub.2 CH.sub.2 SiO.sub.3/2).sub.x (C.sub.6 H.sub.5 SiO.sub.3/2).sub.y (SiO.sub.2).sub.z ( 1)wherein Rf is a perfluoroalkyl group having 1 to 10 carbon atoms, and x, y, and z are 0.2.ltoreq.x.ltoreq.0.95, 0<y.ltoreq.0.8, 0.ltoreq.z.ltoreq.0.05, and x+y+z=1 and having a softening point of 50.degree.-200.degree. C. The fluorosilicone resin is useful for microcapsulating a platinum catalyst for prolonging the pot life of an addition type organopolysiloxane composition and can be used as a coating agent for forming a weather resistant, stainproof, water repellent coating.Type: GrantFiled: November 30, 1994Date of Patent: April 29, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mitsuhiro Takarada, Yoshiteru Kobayashi, Takashi Kondou
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Patent number: 5616632Abstract: In a silicone composition comprising an aliphatic unsaturated group-containing diorganopolysiloxane and an organohydrogenpolysiloxane, there is blended a hydrosilylation catalyst. The catalyst is obtained by stabilizing a platinum group compound with an organopolysiloxane of formula (3):R.sup.4.sub.f R.sup.5.sub.g (CH.sub.3).sub.h SiO.sub.(4-f-g-h)/2 (3)wherein R.sup.4 is a C.sub.2-8 aliphatic unsaturated group, R.sup.5 is a monovalent hydrocarbon group excluding an aliphatic unsaturated group and methyl group, letters f, g, and h are (f+g)/(f+g+h).gtoreq.0.10, 0.0001<f.ltoreq.2.0, and 1.8<f+g+h<2.205. The stabilized platinum group compound is included in a silicone resin comprising at least a R.sup.6 SiO.sub.3/2 or SiO.sub.4/2 unit wherein R.sup.6 is a monovalent hydrocarbon group, at least 10 mol % of the organic groups being the same group as R.sup.5, the silicone resin having a melting or softening point of 30.degree. to 200.degree. C.Type: GrantFiled: November 20, 1995Date of Patent: April 1, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hironao Fujiki, Shigeki Shudo, Takashi Kondou
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Patent number: 5589523Abstract: Disclosed is a microcapsule curing agent including (A) a curing agent for a thermosetting resin and (B) a thermoplastic resin. The microcapsule curing agent is formed as a particle-like material in which component (A) is coated with a layer whose main constituent is component (B) and the mean particle diameter of which is in the range of 0.1 to 20 .mu.m. By using the microcapsule curing agent, a thermosetting resin composition and a prepreg which exhibit good storage stability at room temperature and are excellent in thermal resistance for cured products made therefrom can be obtained. A fiber reinforced composite material obtained using the thermosetting resin composition is excellent in curing uniformity and thermal resistance.Type: GrantFiled: June 6, 1995Date of Patent: December 31, 1996Assignee: Toray Industries, Inc.Inventors: Ryuji Sawaoka, Shinji Kouchi, Toshio Muraki
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Patent number: 5532293Abstract: An adhesive system comprising an activatable, non-tacky cohesive material dispersed in a nonadherent material, said nonadherent material reducing the coefficient of friction of said cohesive material and rendering said cohesive material non-coherent; and a plurality of microcapsules dispersed in said nonadherent material and said cohesive material, said microcapsules encapsulating a solvent for said cohesive and being rupturable upon the application of pressure, wherein upon the application of pressure, the microcapsules rupture and release said solvent and said solvent dissolves said cohesive material such that said cohesive material becomes coherent.Type: GrantFiled: September 7, 1994Date of Patent: July 2, 1996Assignee: The Mead CorporationInventor: Robert A. Landis
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Patent number: 5525425Abstract: A heat curable silicone elastomer composition includes (1) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups, (2) an organohydrogenpolysiloxane having at least two hydrogen atoms, and (3) a platinum-containing silicone resin having a melting or softening point of 49.degree. to 150.degree. C. and containing 0.05-0.3 mol % of SiOH group. The composition is storage stable at room temperature and efficiently cures through hydrosilylation reaction at high temperature.Type: GrantFiled: October 19, 1994Date of Patent: June 11, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kazutoshi Fujioka, Takeo Yoshida
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Patent number: 5512610Abstract: A bone cement composition has adjustable rheological properties, high strength, and produces a uniform radiological image. The cement is characterized by controlled retention and release of additives incorporated in beads included in the dry component of the cement. The cement comprises beads containing a polymerization initiator in controllable concentrations from 0% to 5% or more by weight. These same beads or others may also contain an opacifier. The polymerization initiator and the opacifier may be selectively distributed throughout the beads or at specific radial locations in the beads. They may also be selectively placed in beads of a particular advantageous size range. Furthermore, in other embodiments of the invention, other advantageous additives can be incorporated in the beads such as dyes, antibiotics, bone growth factors, and other pharmacological or therapeutic agents.Type: GrantFiled: July 27, 1994Date of Patent: April 30, 1996Assignee: Zimmer, Inc.Inventor: Steve T. Lin
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Patent number: 5494750Abstract: A heat-curable silicone elastomer composition comprising (A) a thermoplastic resin containing a platinum catalyst and a hydrosilylation reaction retarding agent, (B) an organopolysiloxane having at least two unsaturated aliphatic hydrocarbon groups bonded to silicon atoms in its molecule, and (C) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in its molecule. The composition is excellent in storage stability. That is, even when stored for a long time, the composition has good stability at room temperature and retains curability at high temperatures.Type: GrantFiled: May 10, 1994Date of Patent: February 27, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kazutoshi Fujioka, Takashi Kondou, Takeo Yoshida
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Patent number: 5422385Abstract: An isocyanate-based elastomer containing a filler material, the filler material being present at a level in the range of from about 30% to about 90% by weight of the elastomer and having a specific gravity of less than about 2.0. A process for producing the isocyanate-based elastomer is also disclosed. The process comprises the steps of: providing a first mixture comprising a catalyst and a filler material, the filler material being wetted by the catalyst; providing a second mixture comprising an isocyanate and an active hydrogen-containing compound; mixing the first mixture and the second mixture to provide a reaction mixture; allowing the reaction mixture to react to produce the isocyanate-based elastomer.Type: GrantFiled: September 17, 1993Date of Patent: June 6, 1995Assignee: Woodbridge Foam CorporationInventor: Paul V. Farkas
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Patent number: 5403873Abstract: There is provided a plastisol for use in a electrically conductive molded article comprising non-conductive high polymer particles having surfaces coated with an electrically conductive high polymer or non-conductive high polymer particles having surfaces coated with filler of electrically conductive fine particles, and a plastisizer compatible with the said non-conductive high polymer. The plastisol is excellent in fluidity and good in processability. Said plastisol can provide a molded article having excellent electrical conductivity and is suited for, e.g., production of floor materials or sealing materials having low static properties and formation of an electrically conductive path.Type: GrantFiled: February 11, 1993Date of Patent: April 4, 1995Assignee: Nippon Zeon Co., Ltd.Inventors: Eitaro Nakamura, Kazunori Ueki
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Patent number: 5362770Abstract: A method of increasing the hydrophobicity of solid materials. The inventive method comprises the steps of: (a) metal ion activating the surface of a solid substrate material to provide reactive metal sites on the surface and (b) chemically bonding a surfactant to the surface at the reactive metal sites. Titanium dioxide pigments and other particulate property modifiers treated in accordance with the inventive method are more readily dispersed in polymer compositions.Type: GrantFiled: May 14, 1993Date of Patent: November 8, 1994Assignee: Kerr-McGee Chemical CorporationInventors: Bruce R. Palmer, Rodney D. Stramel
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Patent number: 5321058Abstract: The combination of an organic peroxide, a platinum-containing hydrosilation catalyst that is encapsulated within microparticles of a thermoplastic silicone resin, and acetylenic alcohol as the platinum catalyst inhibitor imparts a unique and desirable combination of properties to organosiloxane compositions curable by a platinum-catalyzed hydrosilylation reaction when the compositions contain a gum-type organopolysiloxane as the major ingredient. The compositions have long term storage stability and cure completely when molded. Cured articles molded from the compositions exhibit excellent mold release properties together with the absence of scorching, mold staining and surface tackiness.Type: GrantFiled: November 16, 1992Date of Patent: June 14, 1994Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hiroshi Fuchigami, Hiroshi Honma, Takao Matsushita
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Patent number: 5302654Abstract: Polymer microparticles having immobilized therein a water-insoluble substance such as oil-soluble dyes or pigments are produced by a method which includes the steps of forming droplets of a solution of a self-emulsifiable resin in a nonaqueous solvent containing the water-insoluble substance and an ethylenically unsaturated monomer suspended in an aqueous medium, and then allowing the monomer in the droplets to polymerize in situ.Type: GrantFiled: March 2, 1993Date of Patent: April 12, 1994Assignee: Nippon Paint Co., Ltd.Inventors: Keizo Ishii, Hidetsumu Okada, Masanori Oiwa, Hisaichi Muramoto, Shinichi Ishikura
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Patent number: 5279898Abstract: The present invention provides microencapsulated hydrosilylation catalysts for one-part heat curable organosiloxane compositions. Compositions containing these exhibit long-term storage stability yet cure rapidly when heated above the melting point of the encapsulating polymer. At least a portion of these microcapsules are less than one micron in diameter, and substantially all are less than about three microns in diameter. Compositions containing the preferred platinum group metals as catalysts are optically transparent.The microencapsulated curing catalysts of this invention are prepared by irradiating with UV light in the wavelength range of from 300 to 400 nanometers a solution containing (1) at least one of a specified group of photocrosslinkable organosiloxane compounds derived from propargyl esters of carboxylic acids containing a terminal aromatic hydrocarbon radical and at least two ethylenically unsaturated carbon atoms and (2) a liquid or solubilized hydrosilylation catalyst.Type: GrantFiled: January 7, 1993Date of Patent: January 18, 1994Assignee: Dow Corning CorporationInventors: Steven M. Evans, Chi-Long Lee, Ming-Hsiung Yeh
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Patent number: 5260353Abstract: A method of increasing the hydrophobicity of solid materials. The inventive method comprises the steps of: (a) metal ion activating the surface of a solid substrate material to provide reactive metal sites on the surface and (b) chemically bonding a surfactant to the surface at the reactive metal sites. Titanium dioxide pigments and other particulate property modifiers treated in accordance with the inventive method are more readily dispersed in polymer compositions.Type: GrantFiled: October 16, 1992Date of Patent: November 9, 1993Assignee: Kerr-McGee Chemical CorporationInventors: Bruce R. Palmer, Rodney D. Stramel
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Patent number: 5244939Abstract: A hardening agent composition for epoxy resins and a method for forming the composition is disclosed, which comprises a low-reactive hardening agent, an imidazole compound and a zeolite, wherein the imidazole compound is substituted on the imidazole nucleus by at least one of (a) and (b): (a) an alkyl group having 2 or more carbon atoms and a polar group and (b) an alkenyl group. The hardening agent composition combined with an epoxy resin to form a thermosetting epoxy resin composition, capable of hardening under heat to give a hardened product, has a remarkably elevated adhesion strength.Type: GrantFiled: October 4, 1990Date of Patent: September 14, 1993Assignee: Somar CorporationInventors: Akira Yasuda, Rihei Nagase
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Patent number: 5232959Abstract: This invention provides a novel class of organohydrogenpolysiloxanes that function as curing agents for organosiloxane compositions curable by a hydrosilylation reaction in addition to imparting excellent adhesion to the cured composition. This invention also provides curable organosiloxane compositions containing these novel organohydrogen-polysiloxanes. The compositions exhibit excellent adhesion to a variety of organic and inorganic substrates, including but not limited to metals, glasses, and plastics.Type: GrantFiled: May 22, 1991Date of Patent: August 3, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Atsushi Togashi, Akira Kasuya
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Patent number: 5225278Abstract: A process for encapsulating a wide variety of target materials, including both hydrophilic and hydrophobic materials, employs condensation of two reactive compounds to form shells around core phase particles including target material dispersed in a continuous phase. One of the reactive compounds has at least two active methylene functional groups per molecule, the other being an active methylene-reactive crosslinking agent. Either type of the reactive compounds can be dispersed in the continuous phase, the other being dispersible in the core phase. Applications include controlled release microencapsulation of agriculture chemicals and biocides.Type: GrantFiled: September 12, 1990Date of Patent: July 6, 1993Assignee: Rohm and Haas CompanyInventors: Andrew J. Kielbania, Jr., William D. Emmons, George H. Redlich
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Patent number: 5218015Abstract: Disclosed is a hardening agent composition for epoxy resins in the form of powdery grains, comprising a low-reactive hardening agent, a hardening promoter, a zeolite and at least one additive selected from a water-repellent fine silica powder, a silane coupling agent and a polysiloxane compound, whereby the additive is adhered to the surfaces of the powdery grains. The composition has a retarded water-absorbing property and has improved storage stability, when blended with an epoxy resin to form a thermosetting epoxy resin composition. Methods for preparing the powdery hardening agent composition are also disclosed.Type: GrantFiled: October 4, 1990Date of Patent: June 8, 1993Assignee: Somar CorporationInventors: Akira Yasuda, Rihei Nagase
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Patent number: 5208275Abstract: The present invention includes:(i) a method for making a coated particulate comprising the steps offorming a polyolefin emulsion or dispersion;fluidizing additive particles;spraying the emulsion or dispersion on the fluidized additive particles; andforming discrete substantially coated additive particles;(ii) a coated particulate made by the above process; and(iii) a process for providing in-reactor stabilization of a polyolefin during a polymerization reaction using the coated additives prepared by the above described method.Type: GrantFiled: November 20, 1990Date of Patent: May 4, 1993Assignee: Shell Oil CompanyInventor: Ananda M. Chatterjee
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Patent number: 5204384Abstract: The curable organosiloxane compositions of the present invention contain a hydrosilylation catalyst that is microencapsulated within a layer of silicone resin or polysilane resin. These compositions are characterized by the presence of carbon black or a member from a specified group of metal compounds that prevents coagulation in cured materials of the resin portion of the microencapsulated catalyst.Type: GrantFiled: January 23, 1991Date of Patent: April 20, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Takao Matsushita, Toshio Saruyama
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Patent number: 5194460Abstract: The present invention provides microencapsulated hydrosilylation catalysts for one-part heat curable organosiloxane compositions. Compositions containing these exhibit long-term storage stability yet cure rapidly when heated above the melting point of the encapsulating polymer. At least a portion of these microcapsules are less than one micron in diameter, and substantially all are less than about three microns in diameter. Compositions containing the preferred platinum group metals as catalysts are optically transparent.The microencapsulated curing catalysts of this invention are prepared by irradiating with UV light in the wavelength range of from 300 to 400 nanometers a solution containing (1) at least one of a specified group of photocrosslinkable organosiloxane compounds derived from propargyl esters of carboxylic acids containing a terminal aromatic hydrocarbon radical and at least two ethylenically unsaturated carbon atoms and (2) a liquid or solubilized hydrosilylation catalyst.Type: GrantFiled: January 2, 1992Date of Patent: March 16, 1993Assignee: Dow Corning CorporationInventors: Steven M. Evans, Chi-Long Lee, Ming-Hsiung Yeh
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Patent number: 5153238Abstract: Storage stable and gel-free organosiloxane compositions in the form of flowable powders are prepared by blending a high consistency polydiorganosiloxane into a quantity of fluidized reinforcing filler that is heated to a temperature of from 100.degree. to 200.degree. C. prior to or immediately following introduction of the polydiorganosiloxane. When silica is the reinforcing filler, the filler is typically treated with an anti-creping agent either prior to or during this blending process. The resultant mixture is heated while being subjected to shearing forces that reduce its average particle size to achieve a flowable powder.Type: GrantFiled: November 12, 1991Date of Patent: October 6, 1992Assignee: Dow Corning CorporationInventors: Carl J. Bilgrien, Chi-long Lee, Steven P. Mullan, Herschel H. Reese
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Patent number: 5142035Abstract: Inclusion compounds of a cyclodextrin, such as .beta.-cyclodextrin, and a palladium halide-diene complex, such as a complex of PdCl.sub.2 and 1,5-cyclooctadiene have been found to be effective hydrosilylation catalysts. One part heat curable organopolysiloxane compositions are also provided.Type: GrantFiled: October 15, 1991Date of Patent: August 25, 1992Assignee: General Electric CompanyInventor: Larry N. Lewis
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Patent number: 5110845Abstract: The tear strength of cured organosiloxane elastomers can be increased and the compression set value reduced without adversely affecting other physical properties if the composition used to prepare the elastomer is curable by a platinum-catalyzed hydrosilation reaction and contains a mixture of two liquid diorganoalkenylsiloxy terminated polydiorganosiloxanes, one of which constitutes from 96 to 99.5 percent by weight of said mixture and contains the alkenyl radicals only at the terminal positions. The second polydiorganosiloxane contains both terminal alkenyl radicals and from 1 to 5 mole percent of alkenyl radicals on non-terminal repeating units.Type: GrantFiled: December 3, 1990Date of Patent: May 5, 1992Assignee: Dow Corning CorporationInventors: Thomas E. Gray, Jary D. Jensen
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Patent number: 5102969Abstract: In a method for the production of a sealing and adhesive strip, particularly for the direct glazing of motor vheicles, using a moisture-hardening single-component polyurethane composition based on telechelic isocyanate prepolymers of aromatic diisocyanates in stoichiometric excess and polyols a composition is employed comprising a) a catalyst for the moisture-hardening and b) a blocked activatable cross-linking agent, and a solvent or solvent mixture is continually injected into the inside of the strip during the extrusion of the strip which liberate the cross-linking agent.For the implementation of the method an extrusion nozzle for the sealing and adhesive strip is used which comprises an injection needle for the solvent opening into the nozzle, the exit opening of which points in the extrusion direction and is located in the region of the center axis of the extrusion die forming the strip.Type: GrantFiled: July 12, 1989Date of Patent: April 7, 1992Assignee: Teroson G.m.b.H.Inventors: Ingolf Scheffler, Michael Hirthammer, Anton M. Schleicher, Jean-Willem Delbeck
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Patent number: 5089582Abstract: Inclusion compounds of a cyclodextrin, such as .beta.-cyclodextrin, and a palladium halide-diene complex, such as a complex of PdCl.sub.2 and 1,5-cyclooctadiene have been found to be effective hydrosilylation catalysts. One part heat curable organopolysiloxane compositions are also provided.Type: GrantFiled: February 26, 1990Date of Patent: February 18, 1992Assignee: General Electric CompanyInventor: Larry N. Lewis
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Patent number: 5084494Abstract: A polyester resin and reinforcement composite for use in the manufacture of glass fiber-reinforced polyester products is disclosed. The composite is prepared using an initiator which has been microencapsulated in order to prevent initiator-induced cross-linking of the resin reactants. The initiator is released during the molding of the composite by rupture of the microcapsules due to internal vapor pressure developed at a preselected temperature. The encapsulation of the initiator increases the storage life and temperature stability of the composites prior to molding. The encapsulation of the initiator also provides improved homogeneity and increased flowability of the composites during molding, an enables the provision of molded polyester products having higher degrees of cure and more defect-free finish surfaces.Type: GrantFiled: September 8, 1989Date of Patent: January 28, 1992Inventor: McDougal: John R.
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Patent number: 4963599Abstract: Woodworking materials having a lower subsequent formaldehyde emission can be prepared in an advantageous manner and with good resin reactivity and good strengths and swelling properties by mixing lignocellulose-containing particles, for example wood particles, with a curable binder based on curable aminoplast condensates and then pressing the mixture under the action of heat, a mixture A containing a water-compatible agent for binding formaldehyde being applied to or mixed with the particles before the latter are mixed with the curable binder, if the mixture A is an aqueous solution which has a pH of from 3.0 to 6.5 and contains(a) organic acids which attack wood only insignificantly, if at all, in an amount of more than 15% by weight, based on the solids content of the solution, preferably a mixture of aliphatic carboxylic acids of 4 to 10 carbon atoms, and(b) a formaldehyde-binding, nitrogen-containing compound, in particular urea.Type: GrantFiled: September 30, 1988Date of Patent: October 16, 1990Assignee: BASF AktiengesellschaftInventors: Christof Schmidt-Hellerau, Johann Mayer
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Patent number: 4948739Abstract: Compact polymer/metal composite particles, sized or unsized, in which the metal is in the form of crystallites encapsulated in a polymer matrix. The composite particles may be prepared by introducing a metal complex into a swollen polymer in an organic liquid which is a solvent for the metal complex, followed by thermal decomposition of the metal complex and removal of the swelling organic liquid. The composite particles may be used in biological applications.Type: GrantFiled: April 4, 1988Date of Patent: August 14, 1990Assignee: Rhone-Poulenc ChimieInventor: Dominique Charmot
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Patent number: 4940852Abstract: A liquid or viscous curable adhesive composition having a prolonged pot life which is composed of a liquid or viscous curable resin which has, preferably evenly and randomly dispersed therethroughout, a multiplicity of rupturable microcapsules containing a curing agent in an amount sufficient to cure the resin. The microcapsules are rupturable upon the application thereto of external pressure, or other mechanical manipulation. Upon rupture, the curing agent is released into coacting relationship with the curable resin and forms therewith an activated adhesive composition.Type: GrantFiled: November 14, 1988Date of Patent: July 10, 1990Assignee: Milton P. ChernackInventor: Milton Chernack
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Patent number: 4833226Abstract: A master batch of hardener for curable one-package epoxy resin system which comprises (I) a hardener consisting of(I) a hardener consisting of(i) a powder of an amine compound (A) as a core having at least one tertiary amino group in the molecule while having no primary and secondary amino groups, the powder having both a group (X) capable of absorbing infrared rays of 1630 to 1680 cm.sup.-1 in wave length and a group (Y) capable of absorbing infrared rays of 1680 to 1725 cm.sup.-1 in wave length at least on the surface of the powder, and(ii) a reaction product of the amine compound (A) and an epoxy resin as a shell; and(II) an epoxy resin (B) in a ratio of 10 to 50,000 parts by weight to 100 parts by weight of the hardener (I).A hardener containing the master batch is also disclosed.Type: GrantFiled: August 26, 1987Date of Patent: May 23, 1989Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hidekazu Ishimura, Masahiko Otsuka, Yasushi Takahashi, Tadayoshi Ishikawa
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Patent number: 4828761Abstract: A process for impregnating cementitious solids with polymeric materials by blending polymeric materials in a grout, allowing the grout to cure, and contacting the resulting solidified grout containing the polymeric materials with an organic mixture containing a monomer, a cross-linking agent and a catalyst. The mixture dissolves the polymerized particles and forms a channel for distributing the monomer throughout the network formed by the polymeric particles. The organic components are then cured to form a substantially water-impermeable mass.Type: GrantFiled: May 4, 1988Date of Patent: May 9, 1989Assignee: The United States of America as represented by the United States Department of EnergyInventors: Alfred J. Mattus, Roger D. Spence
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Patent number: 4808639Abstract: A liquid or viscous curable adhesive composition having a prolonged pot life which is composed of a liquid or viscous curable resin which has, preferably evenly and randomly dispersed therethroughout, a multiplicity of rupturable microcapsules containing a curing agent in an amount sufficient to cure the resin. The microcapsules are rupturable upon the application thereto of external pressure, or other mechanical manipulation. Upon rupture, the curing agent is released into coacting relationship with the curable resin and forms therewith an activated adhesive composition.Type: GrantFiled: July 22, 1987Date of Patent: February 28, 1989Assignee: Production Previews, Inc.Inventor: Milton Chernack
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Patent number: 4758610Abstract: A soldified and particulated resin and a substantially solidified-state-maintained water are mixed with cement and after the mixing is finished, the solidified resin and water are liquefied and the cement is hydrated with the liquefied water. Since the resin maintains the solidified and particulated state and the water also maintains the solidified state during mixing, the mixing work of cement, water and resin is uniformly performed.Type: GrantFiled: January 9, 1987Date of Patent: July 19, 1988Assignee: Mitsui Kensetsu Kabushiki KaishaInventors: Okamoto Tadashi, Utsunomiya Toru, Tamura Tomio, Matsubara Sumiyuki, Hasuo Koichi
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Patent number: 4753969Abstract: A diaphragm for an electroacoustic transducer comprising stratiform mineral of layers into which a hardener or an agent for facilitating hardening is adsorbed between the layers, thermosetting resin monomer, and carbonfibers which constitute a composite material which is formed under heat and pressure. The diaphragm is increased in rigidity which is required as physical properties therefor and is easy in forming.Type: GrantFiled: July 18, 1985Date of Patent: June 28, 1988Assignee: Onkyo KabushikikaishaInventors: Shinya Mizone, Tamotsu Abe, Minoru Adachi, Takashi Kizawa
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Patent number: 4680319Abstract: Compositions based on silane-grafted olefin polymers which are cross-linkable after shaping and which contain from 0.1 to 10% by weight of crystalline zeolites in powder form and, preferably, also a cross-linking coagent consisting of an aryl-carboxilic acid and/or a cross-linking catalyst.Type: GrantFiled: April 29, 1985Date of Patent: July 14, 1987Assignee: Franco GimpelInventors: Franco Gimpel, Corrado Brichta
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Patent number: 4665107Abstract: A process for modifying colorants which comprise an active ingredient of solid primary particles in the submicron range by an encapsulation with polymer starting materials that are not substantially altered during the process. Writing fluids, textile colorants and cosmetic inks are disclosed wherein the intrinsic physical qualities of a solid active material are modified to create a stable aqueous dispersion with performance and rheology characteristic of the polymer, and not of the active ingredient.Type: GrantFiled: March 21, 1986Date of Patent: May 12, 1987Assignee: Koh-I-Noor Rapidograph, Inc.Inventor: Fortunato J. Micale