Including Step Of Surface Coating A Particle Or Process Of Expanding A Surface Coated Particle Patents (Class 521/57)
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Patent number: 6130265Abstract: In a process for preparing expandable styrene polymers containing graphite particles, styrene is polymerized in aqueous suspension in the presence of graphite particles.Type: GrantFiled: November 15, 1999Date of Patent: October 10, 2000Assignee: BASF AktiengesellschaftInventors: Guiscard Glueck, Klaus Hahn, Karl-Heinz Batscheider, Dieter Naegele, Knut Kaempfer, Wolfram Husemann, Frieder Hohwiller
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Patent number: 6046246Abstract: Chemically resistant, strong fluorinated copolymer adsorbent particles for use in carrying out chromatographic separations are prepared by high shear, anaerobic reaction of a di-unsaturated crosslinking agent with a polyfluorinated monomer in the presence of poly(vinyl alcohol) and a porogen.Type: GrantFiled: June 10, 1999Date of Patent: April 4, 2000Assignee: ProMetic Biosciences, Inc.Inventors: Christopher Lowe, Julie Tucker
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Patent number: 6043319Abstract: Provided is a method of preparing a light-weight and inexpensive void type plastic pigment having enhanced hiding power and whiteness relative to inorganic pigments such as titanium oxide or organic pigments such as conventional styrene polymeric plastic pigments by regulating the content of each monomer in the sheath polymerization after core polymerization and controlling the glass transition temperature of the first sheath which is the shell obtained by initial polymerization less than that of the core by 70 to 120.degree. C., thus increasing the difference of refractive index between the polymeric matrices.Type: GrantFiled: June 9, 1998Date of Patent: March 28, 2000Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: HoSull Lee, Kyo-Dong Jo, Kill-Soo Jang, Min-Seok Cho
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Patent number: 6020387Abstract: A low density polymer composition including a polymer component capable of being cured, a low density filler in an amount sufficient to reduce the density of the polymer and a thixotrope present in a sufficient amount to impart a sufficient viscosity and to inhibit separation of the filler from the polymer until after the polymer is cured. The resulting lightweight, filled polymer composition is a strong electrical insulator, has low shrinkage, a low coefficient of thermal expansion, low cured density and a soft filler that does not harden the polymer. Methods of preparing and using the low density polymer compositions are also disclosed.Type: GrantFiled: September 22, 1997Date of Patent: February 1, 2000Assignee: Caschem, Inc.Inventors: William J. Downey, Christopher Andreola, Paul R. Lydigsen, Wayne E. Wright
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Patent number: 6005012Abstract: A method for treating a dried monolithic aerogel containing non-dispersed particles, with an organometallic surface modifying agent to produce hydrophobic aerogels. The dried, porous hydrophobic aerogels contain a protective layer of alkyl groups, such as methyl groups, on the modified surfaces of the pores of the aerogel. The alkyl groups at the aerogel surface typically contain at least one carbon-metal bond per group.Type: GrantFiled: October 29, 1998Date of Patent: December 21, 1999Assignee: The Regents of the University of CaliforniaInventors: Lawrence W. Hrubesh, John F. Poco, Paul R. Coronado
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Patent number: 5985943Abstract: The present invention relates to expandable polystyrene beads containing blowing agent which are coated with from 0.01 to 0.5% by weight of a hydrophobicizing agent which melts above 25.degree. C. and has a mean particle size of less than 100 .mu.m. The beads can be converted into foam moldings having reduced water absorption capacity.Type: GrantFiled: November 12, 1998Date of Patent: November 16, 1999Assignee: Basf AktiengesellschaftInventors: Klaus Hahn, Horst Steinbrecher, Dieter Naegele, Achim Loffler, Manfred Gurtler, Hagen Schmitt, Jurgen Reichert
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Patent number: 5981070Abstract: A manufacturing method of water-absorbent agent powders of the present invention is a method of a reducing an amount of a residue of an epoxy crosslinking agent remaining therein by adding a nucleophilic reagent in a form of powder to surface region crosslinked water-absorbent resin powders having a carboxyl group under an applied heat in which the residue of the crosslinking agent remains. Since the method permits an amount of the residue of the crosslinking agent to be reduced by adding a nucleophilic reagent to the heated water-absorbent resin powders, the water-absorbent agent powders exhibiting well-balanced properties which are mutually negatively correlated from one another, i.e., high absorbency under pressure, a reduced amount of a residue of the epoxy crosslinking agent and a high absorbing rate compared with the conventional surface region crosslinked water-absorbent resin powders can be achieved.Type: GrantFiled: March 3, 1997Date of Patent: November 9, 1999Assignee: Nippon Shokubai Co., LtdInventors: Kunihiko Ishizaki, Kinya Nagasuna, Nobuyuki Harada
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Patent number: 5877226Abstract: A thermal insulating foamed material is a polyurethane foam having closed cells, and produced by mixing, agitating and foaming a polyol, a polyisocyanate, a foam stabilizer, a catalyst, a blowing agent and a carbon dioxide adsorbent. The carbon dioxide adsorbent is produced by mixing and granulating powders of at least one member of alkali metal hydroxides and alkaline-earth metal hydroxides and organic or inorganic powders having a water absorbing property and soaked with water in advance, and formed by a resin film, such as a methacrylic acid ester, which is permeable to carbon dioxide but hardly permeable to water.Type: GrantFiled: April 28, 1998Date of Patent: March 2, 1999Assignee: Matsushita Refrigeration CompanyInventors: Yoshiyuki Tsuda, Kazutaka Uekado, Hideo Nakamoto, Tomohisa Tenra, Tsukasa Takushima
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Patent number: 5859074Abstract: Porous, absorbent macrostructures that comprise flexible interparticle bonded aggregates and are useful in absorbent articles such as diapers, adult incontinence pads, and sanitary napkins are disclosed. These porous macrostructures are treated with an effective amount of a latex to coat at least a portion of the particles comprising the bonded aggregate so as to impart increased flexibility to the macrostruture. This latex is capable of being sintered at a temperature of about 25.degree. C. or lower, is at least somewhat hydrophilic when sintered, and has a Tg of about 25.degree. C. or lower when sintered.Type: GrantFiled: May 9, 1997Date of Patent: January 12, 1999Assignee: The Procter & Gamble Co.Inventors: Ebrahim Rezai, Kesyin Hsueh, Motohiro Shimizu
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Patent number: 5801207Abstract: Biodegradable foamed articles having density comprised from 5 to 300 kg/m.sup.3 obtained by agglomeration of foamed particles having composition comprising a thermoplastic starchy material or a thermoplastic natural polymer capable of absorbing water when converted into the thermoplastic state, a thermoplastic polymer, and water.Type: GrantFiled: September 6, 1996Date of Patent: September 1, 1998Assignee: Novamont S.p.A.Inventors: Catia Bastioli, Vittorio Bellotti, Gianfranco Del Tredici, Angelos Rallis
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Patent number: 5747548Abstract: Apparatus and method for the production of hopper feedable thermoplastic pellets having zones or compartments which contain physically separated reactants which react only after being melt-mixed, as in a screw type extruder, reciproscrew injection machine, or similar device which heat forms pellets into a larger mass. This new class of thermoplastic molding materials relies mainly on the relatively slow reaction kinetics of contained large molecule molding materials to provide a time interval after melt-mixing of zoned pelletized reactants in an extruder barrel or injection molding machine. During this time period, the thermoplastic molding material is easily filled into injection molds. As the reaction progresses, the material becomes more viscous and such flow is difficult or impossible. The involved reactions may continue after demolding at room temperature during a post molding cure, or appliance service generated heat may cause post molding cure.Type: GrantFiled: March 14, 1997Date of Patent: May 5, 1998Assignee: Materials Research Innovations CorporationInventor: Rexford H. Bradt
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Patent number: 5736594Abstract: A novel and environmentally friendly well cementing composition comprising hydraulic cement and ground-up recycled expanded polystyrene having a low density, good compressive strength, good thermal conductivity, and the ability to float, and methods for cementing well bores with said cementing composition.Type: GrantFiled: March 28, 1996Date of Patent: April 7, 1998Assignee: B J Services CompanyInventors: Joel L. Boles, Jeffrey B. Boles
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Patent number: 5734043Abstract: A separating agent which, when used as the packing material for reverse-phase liquid chromatography, has excellent baseline stability in the mobile phase and an increased number of steps of the detected peak in the measurement is provided. The agent comprises a polysaccharide derivative supported on a silica gel having surface silanol groups treated with a silylating agent having an aralkyl group.Type: GrantFiled: December 29, 1995Date of Patent: March 31, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Tatsushi Murakami, Nanami Nishida
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Patent number: 5728742Abstract: The subject invention provides water-swellable polymer compositions having reduced caking tendencies. Such polymer compositions can be produced by employing quaternary ammonium salts. In addition to having reduced caking tendencies such polymers have reduced dust and substantially maintain or increase the surface tension of an aqueous fluid in equilibrium with the polymer and air.Type: GrantFiled: April 4, 1996Date of Patent: March 17, 1998Assignee: The Dow Chemical CompanyInventors: Thomas L. Staples, David E. Henton, Gene D. Rose, Michael A. Fialkowski
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Patent number: 5712315Abstract: In this invention a new form of polytetrafluoroethylene has been found to be compression moldable to provide strong molded articles. It is also useful as an additive or strength binder. The new form is a compression molding powder comprised of comminuted, sheared particles of expanded porous polytetrafluoroethylene, said particles having a nudular-microfibrillar structure of irregular shape, and a mean particle size between 5 and 500 micrometers, and having a coating of a thermoplastic fluoropolymer on at least a portion of the particle. By irregular shape is meant that the nodes and fibrils do not have an ordered arrangement. The bulk density is about 0.06 to 0.2 g/cc.Type: GrantFiled: October 18, 1995Date of Patent: January 27, 1998Assignee: W. L. Gore & Associates, Inc.Inventor: John W. Dolan
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Patent number: 5688449Abstract: A polymeric resin composition comprising a polymeric resin in particulate form coated with an additive agent adhered to the surfaces of the resin particles by a coating of thermoplastic adhesive binder between the particles and the agent.Type: GrantFiled: October 2, 1995Date of Patent: November 18, 1997Assignee: NiTech CorporationInventor: Steve A. Fox
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Patent number: 5658960Abstract: In this invention a new form of polytetrafluoroethylene has been found to be compression moldable to provide strong molded articles. It is also useful as an additive or strength binder. The new form is a compression molding powder comprised of comminuted, sheared particles of expanded porous polytetrafluoroethylene, said particles having a modular-microfibrillar structure of irregular shape, and a mean particle size between 5 and 500 micrometers, and having a coating of a thermoplastic fluoropolymer on at least a portion of the particle. By irregular shape is meant that the nodes and fibrils do not have an ordered arrangement. The bulk density is about 0.06 to 0.2 g/cc.Type: GrantFiled: October 12, 1994Date of Patent: August 19, 1997Assignee: W.L. Gore & Associates, Inc.Inventor: John W. Dolan
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Patent number: 5646192Abstract: In this invention a new form of polytetrafluoroethylene has been found to be compression moldable to provide exceptionally strong molded articles. It is also useful as an additive or strength binder. The new form is a compression molding powder comprised of comminuted, sheared particles of expanded porous polytetrafluoroethylene, said particles having a nudular-microfibrilar structure of irregular shape, and a mean particle size between 5 and 500 micrometers. By irregular shape is meant that the nodes and fibrils do not have an ordered arrangement. The bulk density is about 0.06 to 0.2 g/cc.Type: GrantFiled: October 12, 1994Date of Patent: July 8, 1997Assignee: W. L. Gore & Associates, Inc.Inventors: John W. Dolan, Charles E. Singleton
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Patent number: 5627218Abstract: Apparatus and method for the production of hopper feedable thermoplastic pellets having zones or compartments which contain physically separated reactants which react only after being melt-mixed, as in a screw type extruder, reciproscrew injection machine, or similar device which heat forms pellets into a larger mass. This new class of thermoplastic molding materials relies mainly on the relatively slow reaction kinetics of contained large molecule molding materials to provide a time interval after melt-mixing of zoned pelletized reactants in an extruder barrel or inflection molding machine. During this time period, the thermoplastic molding material is easily filled into injection molds. As the reaction progresses, the material becomes more viscous and such flow is difficult or impossible. The involved reactions may continue after demolding at room temperature during a post molding cure, or appliance service generated heat may cause post molding cure.Type: GrantFiled: March 20, 1995Date of Patent: May 6, 1997Inventor: Rexford H. Bradt
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Patent number: 5621015Abstract: The present invention is directed to a process for the treating of surfaces of thermoplastic additives having the propensity to be hydrophilic by blending glycerol tristearate with the additive in a high intensity mixer.Type: GrantFiled: October 11, 1994Date of Patent: April 15, 1997Assignee: Gaia Reserch Limited PartnershipInventors: Rodrigo A. Garcia, Joseph G. Gho
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Patent number: 5593624Abstract: A method of making beaded foam molded products with corrosion inhibitor incorporated therein includes the steps of expanding a foamable synthetic resin into puffed beads, spraying onto the puffed beads a liquid containing a vapor phase corrosion inhibitor to provide a coating thereon, and molding the coated puffed beads into a beaded foam molded product with the corrosion inhibitor dispersed throughout the thickness thereof and migratable to the surface thereof.Type: GrantFiled: May 24, 1995Date of Patent: January 14, 1997Inventor: Eugene R. Lewis
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Patent number: 5589518Abstract: Biodegradable foamed articles having density comprised from 5 to 300 kg/m.sup.3 obtained by agglomeration of foamed particles having composition comprising a thermoplastic starchy material or a thermoplastic natural polymer capable of absorbing water when converted into the thermoplastic state, a thermoplastic polymer, and water.Type: GrantFiled: June 6, 1995Date of Patent: December 31, 1996Assignee: Novamont S.p.A.Inventors: Catia Bastioli, Vittorio Bellotti, Gianfranco Del Tredici, Angelos Rallis
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Patent number: 5585410Abstract: Bead-form, expandable styrene polymers containing, based on the styrene polymer, from 0.005 to 1.5% by weight of polyethylene wax and from 0.005 to 1% by weight of dimeric .alpha.-methylstyrene, and a process for the preparation thereof.Type: GrantFiled: May 8, 1995Date of Patent: December 17, 1996Assignee: BASF AktiengesellschaftInventors: Dietrich Scherzer, Klaus Hahn, Michael Riethues, Dieter Naegele, Michael Witt, Wolfram Husemann
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Patent number: 5580656Abstract: Microsphere beads are mixed with a surface barrier liquid or mixture of such a liquid with a solid effective to prevent agglomeration and surface bonding of the microspheres; by the control of the application of heat and balancing temperature and active mixing, removal of water from the microspheres is achieved.The surface barrier liquid or mixture of such a liquid with a solid in the present invention is any one of a wide diversity of materials which meet the requirements of the intended function, i.e., to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, plasticizers, diluents, extenders, monomers and oligomers, and the like.Type: GrantFiled: December 28, 1994Date of Patent: December 3, 1996Inventor: George E. Melber
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Patent number: 5571847Abstract: Disclosed is a compatibilized carbon black useful in melt processing of plastic material. The carbon black is coated with a compatibilizing agent which enhances the dispersibility of the carbon black in a melt of the plastic material. Further disclosed are processes for making plastic foam structures with the compatibilized carbon black.Type: GrantFiled: June 9, 1995Date of Patent: November 5, 1996Assignee: The Dow Chemical CompanyInventors: Martin K. Hitchcock, Kyung W. Suh, Arnold M. Bartz, Andrew N. Paquet, William G. Stobby
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Patent number: 5518807Abstract: The invention provides pyrotechnic sheet material comprising a substrate of porous, vapour-permeable oxidizing polymeric film, for example a halogenopolymeric film, having a layer of oxidizable material for example magnesium, on at least part of its surface, the substrate and the oxidizable material being conjointly capable of reacting together on ignition. Advantageously at least part of the oxidizing material is accommodated within the polymer pores.The pyrotechnic sheet material burns faster than material comprising solid polymeric film.Type: GrantFiled: August 6, 1993Date of Patent: May 21, 1996Assignee: Imperial Chemical Industries PLCInventors: Sek K. Chan, Steven J. Graham, Graeme A. Leiper
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Patent number: 5413853Abstract: The present invention provides a melamine resin foam comprising a foam body obtained by foaming a resin composition composed mainly of a melamine-formaldehyde condensate and a blowing agent, and hydrophobic component coated on said foam body.This melamine resin foam is improved in fragility and water absorbability and in which the drawbacks of the prior art have been alleviated.Type: GrantFiled: June 27, 1994Date of Patent: May 9, 1995Assignee: Nisshinbo Industries, Inc.Inventors: Yasuo Imashiro, Shun Hasegawa, Takahiko Matsumoto
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Patent number: 5397807Abstract: Disclosed is a compatibilized carbon black useful in melt processing of plastic material. The carbon black is coated with a compatibilizing agent which enhances the dispersibility of the carbon black in a melt of the plastic material. Further disclosed are processes for making plastic foam structures with the compatibilized carbon black.Type: GrantFiled: May 27, 1994Date of Patent: March 14, 1995Assignee: The Dow Chemical CompanyInventors: Martin K. Hitchcock, Kyung W. Suh, Arnold M. Bartz, Andrew N. Paquet, William G. Stobby
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Patent number: 5369134Abstract: Described is a method of rendering antistatic and/or rendering flame-resistant and/or coloring polyolefin particle foams, in which polyolefin particles are wetted with an organic liquid, a powder composition which contains a flame-proofing agent, an antistatic agent and/or a coloring agent as well as a film-forming agent is added with mixing and the resulting mixture is sintered in per se known manner.Type: GrantFiled: October 22, 1993Date of Patent: November 29, 1994Assignee: Hein-Farben GmbHInventors: Gerhard Grab, Dieter Jacob
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Patent number: 5366999Abstract: A polyurethane foam web with a thickness of 5 mm to 30 mm is passed continuously through a dipping bath and is thereby impregnated with 10% to 1000% by weight of a polymer dispersion consisting of the components A) and B) defined below:A) 30% to 65% by weight, preferably 40% to 60% by weight and particularly preferably 45% to 50% by weight of a cationic styrene/butadiene copolymer latex containing about 50% of dry substance, or of an anionic butadiene/acrylonitrile copolymer latex, andB) 10% to 50% by weight, preferably 15% to 40% by weight and particularly preferably 25% to 35% by weight of an inorganic and/or organic pulverulent filler,and the foam web treated in this way is compressed to remove excess liquid and then dried in a drying oven at temperatures of 80.degree. C. to 120.degree. C.Type: GrantFiled: July 9, 1993Date of Patent: November 22, 1994Assignee: Bayer AktiengesellschaftInventors: Edmund Giez, Imre Pascik, Joachim Priemer
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Patent number: 5360827Abstract: A process for preparation of latex of a hollow polymer which comprises adding a base, in the presence of a monomer, to latex containing carboxy-modified copolymer particles to make the pH of the latex 8 or more; adding a carboxyl group-containing monomer to make the pH of the latex 7 or less; and then polymerizing these monomers.Type: GrantFiled: March 30, 1993Date of Patent: November 1, 1994Assignee: Nippon Zeon Co., Ltd.Inventors: Hideki Toda, Yukio Takagishi, Masaru Kaino
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Patent number: 5342689Abstract: Microsphere wet cake is mixed with a surface barrier coating effective to prevent agglomeration and surface bonding of the microspheres, and removing water by drying with continuous mixing at high shear. In a subsequent step, by the control of the application of heat and balancing temperature and low shear mixing, it is possible to also control expansion of the microspheres.The surface barrier coating in the present invention is any one of a wide diversity of materials which meet the requirements of the intended function, i.e., to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, dry inorganic pigments or filler materials, and the like, and related organic materials.Type: GrantFiled: October 23, 1992Date of Patent: August 30, 1994Assignee: Pierce & Stevens CorporationInventors: George E. Melber, Leon E. Wolinski, William A. Oswald
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Patent number: 5317044Abstract: Compositions for producing foamed products which include additives and blowing agents which cause the surface treatment additives to migrate to the surfaces of foamed products. The products produced from the compositions require less additives because the incorporated additives are concentrated at the surfaces thereof.Type: GrantFiled: June 11, 1991Date of Patent: May 31, 1994Assignee: J. M. Huber CorporationInventors: Gerry Mooney, Rod A. Garcia, Michael E. Tarquini, John A. Kosin
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Patent number: 5314924Abstract: An expandable polyolefin composition is disclosed for forming antistatic foam products. The composition includes a polyolefin resin; a hydrocarbyl sulphonate; and an ester of a long-chain fatty acid and polyhydric alcohol. Each of the sulphonate and the ester are present in the composition in an amount sufficient to form a polyolefin product having desirable antistatic properties. A process for extrusion foaming of the composition, and thus formed foam products, are also disclosed.Type: GrantFiled: October 12, 1993Date of Patent: May 24, 1994Assignee: Sealed Air CorporationInventor: Shau-Tarng Lee
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Patent number: 5306736Abstract: Compositions for producing foamed products which include additives and blowing agents which cause the surface treatment additives to migrate to the surfaces of foamed products. The products produced from the compositions require less additives because the incorporated additives are concentrated at the surfaces thereof.Type: GrantFiled: July 31, 1992Date of Patent: April 26, 1994Assignee: J. M. Huber CorporationInventors: Gerry Mooney, Rod A. Garcia, Michael E. Tarquini, John A. Kosin
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Patent number: 5302455Abstract: A stabilized powdered endothermic blowing agent which is a mixture of polycarboxylic acid and an inorganic carbonate, the polycarboxylic acid and the inorganic carbonate each having been surface treated with a component which prevents water from being absorbed thereby. The blowing agent is incorporated into a composition for producing foamed products. Additives may be added to the composition which function in conjunction with the blowing agent to cause surface migration of the additives and/or improve weld line strength of the foamed products.Type: GrantFiled: April 22, 1992Date of Patent: April 12, 1994Assignee: J. M. Huber CorporationInventors: Satish K. Wason, Gerry Mooney, Michael E. Tarquini, John A. Kosin, Rod A. Garcia, Claude R. Andrews
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Patent number: 5302633Abstract: An optical resolution agent which is prepared by polymerizing a polysaccharide derivative having vinyl groups introduced into the hydroxyl groups thereof through an ester or urethane linkage on the surface of a porous support or by copolymerizing such a polysaccharide derivative having vinyl groups introduced thereinto with a porous support having vinyl groups introduced thereinto and which enables an efficient optical resolution of a racemic modification by chromatography.Type: GrantFiled: January 26, 1993Date of Patent: April 12, 1994Assignee: Nacalai Tesque, Inc.Inventors: Kazuhiro Kimata, Riyo Tsuboi
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Patent number: 5290819Abstract: Bead-form expandable styrene polymers are obtained by suspension polymerization of styrene with addition of from 1 to 10% by weight of C.sub.3 - to C.sub.7 -hydrocarbons and/or carbon dioxide as blowing agent and, if desired, conventional additives, using, as suspension stabilizer, a mixture of magnesium pyrophosphate, a sulfonate group-containing extender and an alkali metal carboxylate or alkaline earth metal carboxylate, the magnesium pyrophosphate being prepared immediately before the polymerization by combining an aqueous solution of alkali metal pyrophosphate with at least the stoichiometrically necessary amount of a magnesium salt.Type: GrantFiled: June 17, 1993Date of Patent: March 1, 1994Assignee: BASF AktiengesellschaftInventors: Michael Witt, Manfred Walter
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Patent number: 5290818Abstract: Rebond polyurethane foams can be prepared by coating shredded polyurethane foam with a prepolymer binder formulation which includes toluene diisocyanate distillation bottoms, compressing the binder coated foam, and the curing the binder with steam. The toluene diisocyanate distillation bottoms can be used in place of more expensive prepolymer formulation components such as toluene diisocyanate or methylene diphenyldiisocyanate. The toluene diisocyanate distillation bottoms can also improve elongation and tear resistance properties of the resultant rebond foams prepared therewith.Type: GrantFiled: December 11, 1992Date of Patent: March 1, 1994Assignee: The Dow Chemical CompanyInventors: John L. Nafziger, Steven B. Lowenkron, Charles E. Koehler, Bruce N. Stevens
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Patent number: 5286382Abstract: A composite porous membrane is formed from a porous polymeric substrate having its entire surface modified with a cross-linked polymer which results in a hydrophobic and oleophobic surface. The composite membrane retains substantially all of its other original properties. The cross-linked polymer is formed in situ on the polymeric substrate from a reactant system comprising an ethylenically unsaturated monomer having at least one fluoroalkyl group, a cross-linker, and, if needed, a polymerization initiator, dissolved in a nonpolar and or weakly polar solvent system. The membrane substrate saturated with the reactant system is exposed to a suitable energy source to effect polymerization and cross linking of the monomer.Type: GrantFiled: May 17, 1993Date of Patent: February 15, 1994Assignee: Millipore CorporationInventors: Louis M. Scarmoutzos, John Charkoudian
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Patent number: 5286756Abstract: The invention relates to an expandable styrene polymer, comprising(a) a styrene polymer,(b) from 1 to 10% by weight, based on (a), of a blowing agent or blowing agent mixture,(c) from 0.02 to 0.25% by weight, based on (a), of a first coating containing a coating composition comprising(c.sub.1) a bisamide made from a C.sub.2 -C.sub.8 -alkylenediamine and an aliphatic C.sub.6 -C.sub.20 -carboxylic acid and(c.sub.2) a conventional antistatic,in a (c.sub.1):(C.sub.2) weight ratio of from 1 to 50,and, if desired, further coating compositions or coating composition mixtures and conventional additives in effective amounts, and to a process for the preparation of screen fractions of bead-form, expandable styrene polymers prepared by suspension polymerization.Type: GrantFiled: July 8, 1992Date of Patent: February 15, 1994Assignee: BASF AktiengesellschaftInventor: Manfred Walter
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Patent number: 5284881Abstract: Disclosed is composite hollow particles which are excellent in solvent resistance and mechanical stability and have strong walls and which can be easily synthesized. The composite hollow particles are prepared by uniformly dispersing the following ingredients in an aqueous medium;(a) an ethylenically unsaturated monomer having at least two radical polymerizable double bonds in one molecule,(b) another polymerizable monomer which is different from the monomer (a),(c) organic particles having an average particle size of 0.01 to 5 micrometer,(d) a initiator, and(e) a dispersant,and then dispersion-polymerizing.Type: GrantFiled: October 15, 1992Date of Patent: February 8, 1994Assignee: Nippon Paint Co., Ltd.Inventors: Katsumi Mizuguchi, Koichi Saito, Shinichi Ishikura
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Patent number: 5273824Abstract: A cored multi-shell emulsion particle consisting of a core particle, a void layer existing in the exterior of the core particle and a shell layer, each of which has a diameter of .phi., d and D, respectively, and the ratio of .phi., d and D is in the following range..phi./D=0.1-0.6d/D=0.2-0.8 (d>.phi.)The particle exhibits excellent hiding power, brightness, gloss and thermal insulation property as an organic pigment without impairing drying ability and strength of coated layer.Type: GrantFiled: February 1, 1991Date of Patent: December 28, 1993Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Futoshi Hoshino, Makoto Nakano, Kousuke Someya, Junko Morita, Takeshi Yanagihara, Akihiro Yamazaki
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Patent number: 5269987Abstract: There is disclosed a process for producing alkenyl aromatic foams utilizing a combination of atmospheric and organic gases as blowing agent, preferably using greater than 30% by weight of atmospheric gas, and preferably also using a predetermined about of a masterbatch mix comprising a styrenic polymer, a rubbery block copolymer, and a solid blowing agent. Also disclosed are alkenyl aromatic foams produced by the process which exhibit increased densities, increased thermoforming capabilities, increased post-expansion properties, and increased retainment of the atmospheric and organic gases.Type: GrantFiled: December 22, 1992Date of Patent: December 14, 1993Inventors: Michael E. Reedy, Edward W. Rider, Jr.
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Patent number: 5252618Abstract: Compositions for producing foamed products which include filler and/or pigment additives and blowing agents which enhance the strength of weld lines which are produced when the compositions are molded. The products produced from the compositions have weld line that demonstrate superior strengths as compared to similar foamed products which do not utilized the particular blowing agents.Type: GrantFiled: April 22, 1991Date of Patent: October 12, 1993Assignee: J. M. Huber CorporationInventors: Rod A. Garcia, John A. Kosin, Gerry Mooney, Michael E. Tarquini
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Patent number: 5250224Abstract: A stabilized powdered endothermic blowing agent which is a mixture of a polycarboxylic acid and an inorganic carbonate, the polycarboxylic acid and inorganic carbonate each having been surface treated with a component which prevents water from being absorbed thereby The blowing agent is incorporated into a polymeric concentrate used for producing foamed products.Type: GrantFiled: March 30, 1992Date of Patent: October 5, 1993Assignee: J. M. Huber CorporationInventors: Satish K. Wason, Gerry Mooney, Claude R. Andrews, Michael E. Tarouini, John A. Kosin, Rod A. Garcia
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Patent number: 5240966Abstract: A granular colorant for coloring thermoplastic resins such as polypropylene, composed of dye/pigment-containing porous thermoplastic resin grains, which is characterized that a dye/pigment composition containing a dispersing agent and/or a carrier resin having a lower softening point than the porous thermoplastic resin grains and dye/pigment is filled in and/or adhered on the pores and/or surfaces of the porous thermoplastic resin grains, is disclosed. The granular colorant is hardly deteriorated by heat and has excellent handlability, meterability, dispersibility and dilutability.Type: GrantFiled: September 19, 1991Date of Patent: August 31, 1993Assignees: Dainippon Ink and Chemicals, Inc., Himont IncorporatedInventors: Hirotomo Iwasaki, Isao Kitajima, Giampaolo Barbi, Enrico Constantini
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Patent number: RE35239Abstract: A stabilized powdered endothermic blowing agent .[.which.]. is a mixture or a polycarboxylic acid and an inorganic carbonate, .[.and.]. .Iadd.the .Iaddend.polycarboxylic acid and inorganic carbonate each having been surface treated with a component which prevents water from being absorbed thereby. The blowing agent is incorporated into a polymeric concentrate used for producing foamed products.Type: GrantFiled: January 23, 1995Date of Patent: May 14, 1996Assignee: J.M. Huber CorporationInventors: Satish K. Wason, Gerry Mooney, Claude R. Andrews, Michael E. Tarquini, John A. Kosin, Rod A. Garcia
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Patent number: RE35368Abstract: Compositions for producing foamed products which include additives and blowing agents which cause the surface treatment additives to migrate to the surfaces of foamed products. The products produced from the compositions require less additives because the incorporated additives are concentrated at the surface thereof.Type: GrantFiled: January 23, 1995Date of Patent: October 29, 1996Assignee: J. M. Huber CorporationInventors: Gerry Mooney, Rod A. Garcia, Michael E. Tarquini, John A. Kosin
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Patent number: RE35447Abstract: Compositions for producing foamed products which include filler and/or pigment additives and blowing agents which enhance the strength of weld lines which are produced when the compositions are molded. The products produced from the compositions have weld .[.line.]. .Iadd.lines .Iaddend.that demonstrate superior strengths as compared to similar foamed products which do not utilize the particular blowing agents.Type: GrantFiled: January 23, 1995Date of Patent: February 11, 1997Assignee: J. M. Huber CorporationInventors: Rod A. Garcia, John A. Kosin, Gerry Mooney, Michael E. Tarquini