Including Step Of Surface Coating A Particle Or Process Of Expanding A Surface Coated Particle Patents (Class 521/57)
  • Publication number: 20100051220
    Abstract: Expandable microspheres formed by suspension polymerization using a shot growth method are provided. The microspheres are formed of a continuous, gas impermeable shell surrounding a blowing agent. The shell includes a first polymer layer formed from primary monomers and a second layer that includes a chemically reactive monomer or a high Tg monomer. To form the microspheres, the primary monomers are polymerized in a reaction vessel to an approximate 90% polymerization, at which time a secondary monomer that is either a monomer having a Tg of at least 85° C. or a chemically reactive monomer, is added to the reaction vessel to drive the polymerization reaction to completion. The outer layer thus contains either a larger amount of the high Tg monomer or a chemically reactive monomer that possesses the ability to covalently bond a cationic species. The microspheres may be used in papermaking processes to increase the paper bulk.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: Yaoliang Hong, Kosaraju Krishna Mohan, Peter M. Froass, Mark Fagan, Christopher D. Anderson, Brian Boyars, Eric Scott Daniels, Victoria Laurentia Dimonie, Edward David Sudol, Andrew Klein
  • Publication number: 20100018142
    Abstract: A method of manufacturing a fire retardant composite, a composite and its use. A method of manufacturing a fire retardant composite by applying an aqueous gel-forming composition, e.g. a fire retardant coating composition, on a substrate comprises an aluminosilicate, the aluminosilicate comprising alkali metal aluminate and an alkali metal silicate, and an organic liquid having a boiling point greater than 110° C., e.g. silicone oil. The molar ratio of SiO2:X2O for the alkali metal silicate is from 3.6:1 to 10:1, where X represents the alkali metal of the alkali metal silicate, when the alkali metal aluminate has a molar ratio of Y2O:AI2O3 of 1.35:1, where Y represents the alkali metal of the alkali metal aluminate, this providing improved water resistance for films or coatings prepared from the compositions by drying and curing.
    Type: Application
    Filed: January 23, 2008
    Publication date: January 28, 2010
    Inventors: Peter Willem Marie Schouren, Eric Peter Wilhelmus Elisabeth Smeets, Moses Rathbun, Abraham Araya, Henricus Johanna De Swart, Wilhelmus Petrus Theodorus Kemperman, Jan Noordegraaf, Petrus Erederikus Maria Rensen, Christianus Marcus Gijsbertus Maria Buijk
  • Publication number: 20100004348
    Abstract: The present invention relates to an expandable styrene polymer which comprises athermanous particles and has been coated with a hydrophobicizing agent, which comprises from 10 to 90% by weight of at least one triester of at least one fatty acid with a polyhydric alcohol, as component A, from 5 to 70% by weight of at least one monoester of a fatty acid with a polyhydric alcohol, as component B, from 5 to 80% by weight of at least one metal salt of a fatty acid, as component C, from 5 to 50% by weight of at least one silicate, as component D, and from 0 to 30% by weight of at least one antistatic agent, as component E, and the entirety of components A to E of the hydrophobicizing agent amounts to 100% by weight, to a process for preparation of expandable styrene polymer, via coating of an expandable styrene polymer, which comprises athermanous particles, with a hydrophobicizing agent, to a foam produced from this expandable styrene polymer, and also to the use of a hydrophobicizing agent for coating of expandab
    Type: Application
    Filed: December 17, 2007
    Publication date: January 7, 2010
    Inventors: Frank Braun, Angelika Keller, Gerhard Dembeck, Jürgen von Auenmüller
  • Patent number: 7638559
    Abstract: Resin beads having an average particle size of from 0.001 mm to 10 mm and containing a continuous phase and a particulate dispersed phase are described. The continuous phase includes elastomeric polymers; the dispersed phase includes homopolymers and/or copolymers containing repeat units resulting from the polymerization of one or more aryl polymerizable monomers. The unexpanded polymer resin beads can be prepared by dispersing an organic phase containing elastomeric polymers and one or more monomers, into droplets and polymerizing the monomers in the organic droplets in a low shear flow pattern. The beads can be impregnated with blowing agents, expanded and can be used to make molded articles. Resin beads having a continuous phase comprising a nitrile rubber, and a dispersed phase comprising one or more homopolymers and/or copolymers containing repeat units resulting form the polymerization of one or more aryl polymerizable show prolonged retention of blowing agents in unexpanded form.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: December 29, 2009
    Assignee: NOVA Chemicals Inc.
    Inventors: Grazyna Petela, Michel Florentine Jozef Berghmans, Karel Cornelis Bleijenberg
  • Patent number: 7632559
    Abstract: Expandable sealant and baffle compositions and methods of forming and using such compositions are provided wherein the compositions comprise a first thermoplastic resin, an epoxy resin, preferably a second thermoplastic resin different from the first thermoplastic resin, and optionally a compound selected from the group consisting of pigments, blowing agents, catalysts, curing agents, reinforcers, and mixtures thereof. The resulting compositions are formed as self-sustaining bodies which can be heat-expanded into a lightweight, high strength product for sealing hollow structural members of vehicles, substantially decreasing the noise which travels along the length of those members as well as strengthening those members with minimal increases in their weights. In a preferred embodiment, the first thermoplastic resin is an SBS block co-polymer, the epoxy resin is a bisphenol A-based liquid epoxy resin, the second thermoplastic resin is a polystyrene, and the reinforcer is hydrated amorphous silica.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: December 15, 2009
    Assignee: Sika Technology AG
    Inventors: Chin-Jui Chang, Gerald Fitzgerald
  • Publication number: 20090280328
    Abstract: The present invention provides heat-expanded microspheres having high packing efficiency, and a production method thereof. The heat-expanded microspheres are produced by expanding heat-expandable microspheres, which comprise shell of thermoplastic resin and a blowing agent encapsulated therein having a boiling point not higher than the softening point of the thermoplastic resin and have an average particle size from 1 to 100 micrometer, at a temperature not lower than their expansion initiating temperature, and the heat-expanded microspheres result in a void fraction not higher than 0.70.
    Type: Application
    Filed: September 14, 2006
    Publication date: November 12, 2009
    Applicant: Matsumoto Yushi-Seiyaku Co. Ltd
    Inventors: Toshiaki Masuda, Ichiro Takahara, Kenichi Kitano, Katsushi Miki, Takeshi Inohara, Takayuki Aoki
  • Patent number: 7612119
    Abstract: Expandable vinylaromatic polymers which comprise: a) a matrix obtained by polymerizing 50-100% by weight of one or more vinylaromatic monomers and 0-50% by weight of a copolymerizable monomer; b) 1-10% by weight, calculated with respect to the polymer (a) of an expanding agent englobed in the polymeric matrix; c) 0.01-20% by weight, calculated with respect to the polymer (a) of carbon black distributed in the polymeric matrix having an average diameter ranging from 30 to 2000 nm, a surface area ranging from 5 to 40 m2/g, a sulfur content ranging from 0.1 to 2000 ppm and an ash content ranging from 0.001 to 1%.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: November 3, 2009
    Assignee: Polimeri Europa S.p.A.
    Inventors: Antonio Ponticiello, Alessandra Simonelli, Loris Zamperlin
  • Patent number: 7579072
    Abstract: A substrate, for example, a display glass substrate, can be transported and stored with high efficiency, without breaking and adhering dust. A substrate accommodating tray includes a frame member 12 formed to have a larger rectangular frame shape than a glass substrate and four support members 11, having elasticity, formed in an inside region surrounded by the frame member 12. The frame member 12 is formed with a pair of longitudinal direction frames 12a and a pair of width direction frames 12b, and the four support members 11 are arranged while being engaged with the frame member 12. Each support member 11 includes conductive polyethylene foam, which is molded by coating conductive particles on synthetic resin beads as a raw material and foaming it in this state. Therefore, transferring of the resin onto the glass substrate can be prevented during transportation and storage.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: August 25, 2009
    Assignees: Sharp Kabushiki Kaisha, Sydex Corporation
    Inventors: Takenori Yoshizawa, Hiroto Shibata
  • Patent number: 7560498
    Abstract: A process of producing a foamed molding, wherein expanded, substantially non-crosslinked polypropylene-based resin beads are heated in a mold to fuse-bond the beads together into a unitary body. Each of the expanded beads has been surface-modified with an organic peroxide.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: July 14, 2009
    Assignee: JSP Corporation
    Inventors: Hidehiro Sasaki, Akinobu Hira, Keiichi Hashimoto, Hisao Tokoro
  • Publication number: 20090156701
    Abstract: A polymer particle (10) useful for opacifying includes a polymer core (12) and a polymer sheath (16) surrounding the polymer core (12). The polymer core (12) is produced by polymerizing the polymer sheath (16) around the polymer core (12) in an emulsion. After at least a portion of the polymer core (12) is formed, a non-homopolymerizing monomer is added to the emulsion.
    Type: Application
    Filed: October 13, 2006
    Publication date: June 18, 2009
    Applicant: Valspar Sourcing, Inc.
    Inventors: Martin Peter Josep Heuts, Archie W. Garner
  • Publication number: 20080293838
    Abstract: The present invention provides a process for producing thermo-expansive microspheres comprising a thermoplastic resinous shell and a blowing agent being encapsulated in the shell, the blowing agent which is a fluorine-containing C2-10 compound having ether linkage, being free of chlorine and bromine atoms and gasifying at a temperature not higher than the softening point of the thermoplastic resin. The thermo-expansive microspheres have preferably an average particle size ranging from 1 to 100 ?m and a CV, or coefficient of variation, of particle size distribution being 30% or less, and a retaining ratio of blowing agent encapsulated being 90% or more.
    Type: Application
    Filed: February 6, 2008
    Publication date: November 27, 2008
    Inventors: Katsushi Miki, Toshiaki Masuda, Ichiro Takahara, Takashi Fujie, Ikuo Yosejima
  • Publication number: 20080234400
    Abstract: The invention relates to a process for producing foam moldings from prefoamed foam particles which have a polymer coating in a mold under pressure, wherein the polymer coating comprises an athermanous compound and also foam moldings produced therefrom and their use.
    Type: Application
    Filed: August 9, 2006
    Publication date: September 25, 2008
    Applicant: BASF SE
    Inventors: Markus Allmendinger, Klaus Hahn, Bernhard Schmied, Michael Riethues
  • Publication number: 20080139679
    Abstract: The present invention relates to a method for producing a starting material from which a foamed moulded product can be formed, which starting material is based on particulate expandable polystyrene (EPS). The present invention further relates to a foamed moulded product based on particulate expandable polystyrene (EPS), which foamed mould product has a fine cell structure and a low density.
    Type: Application
    Filed: December 4, 2007
    Publication date: June 12, 2008
    Inventors: Jan Noordegraaf, Robin Nicholas Britton, Franciscus Petrus Antonius Kuustermans
  • Publication number: 20080096991
    Abstract: Expanded polystyrene coated with at least one organic pesticide, methods for making expanded polystyrene coated with at least one organic pesticide, and molded articles made from expanded polystyrene coated with at least one organic pesticide is provided herein.
    Type: Application
    Filed: October 20, 2006
    Publication date: April 24, 2008
    Inventors: Navnit Bhuleshwar Upadhyay, Theodore Alan Grant
  • Patent number: 7351752
    Abstract: The present invention provides thermo-expansive microspheres comprising thermoplastic resinous shell and a blowing agent being encapsulated in the shell, the blowing agent which is a fluorine-containing C2-10 compound having ether linkage, being free of chlorine and bromine atoms and gasifying at a temperature not higher than the softening point of the thermoplastic resin; and also provides the production and application processes thereof. The thermo-expansive microspheres have preferably an average particle size ranging from 1 to 100 ?m and a CV, or coefficient of variation, of particle size distribution being 30% or less, and a retaining ratio of blowing agent encapsulated being 90% or more. The thermo-expansive microspheres have low environmental loading and superior flame-retardant or flame-resistant performance, and have particle sizes distributing in narrow ranges.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: April 1, 2008
    Assignee: Matsumoto Yushi-Seiyaku Co., Ltd.
    Inventors: Katsushi Miki, Toshiaki Masuda, Ichiro Takahara, Takashi Fujie, Ikuo Yosejima
  • Patent number: 7297718
    Abstract: A method of producing substantially spherical lyogels in water insoluble silylating agents is provided. The present invention refers to a method of producing substantially spherical lyogels in which a) a lyosol is provided, b) the lyosol obtained in step a) is transferred to at least one silylating agent in which the lyosol is insoluble, and c) the spherical lyosol formed in step b) is gelatinised in at least one silylating agent in which the lyosol is likewise insoluble, to produce the lyogel.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: November 20, 2007
    Assignee: Cabot Corporation
    Inventors: Fritz Schwertfeger, Uwe Baumler
  • Patent number: 7294655
    Abstract: Expandable or pre-expanded thermoplastic particles, e.g. polystyrene particles, used to form foam containers e.g. cups, bowls, are coated with a coating composition comprising a liquid part consisting of a) liquid polyethylene glycol with an average molecular weight of 200 to 800; and a solid part comprising components selected from the group consisting of b) polyolefin wax, e.g. polyethylene wax, c) a metal salt of higher fatty acids, e.g. zinc stearate or calcium stearate; d) polyethylene glycol with an average molecular weight of 900 to 10,000; and e) a fatty bisamide or fatty amide, e.g. ethylene bis-stearamide; and combinations of b) through e). The coating composition prevents or resists leakage of liquids and foods with oil and/or fatty components and improves the rim strength and ATF properties of foam containers.
    Type: Grant
    Filed: January 31, 2004
    Date of Patent: November 13, 2007
    Assignee: Nova Chemicals Inc.
    Inventors: Jiansheng Tang, David Allen Cowan, Dennis H. Piispanen, Michael T. Williams
  • Patent number: 7259189
    Abstract: A process for the production of expanded beads, including kneading a base resin containing a polypropylene resin and having a tensile modulus of at least 1,200 MPa together with a mixture of a coloring agent and a thermoplastic polymer having a tensile modulus lower than that of the base resin to form a kneaded mixture including a matrix of the base resin and a multiplicity of domains dispersed in the matrix and each containing the thermoplastic polymer and the coloring agent. The kneaded mixture is formed into resin particles, then treated with an organic peroxide to modify surfaces of the resin particles therewith. Foaming and expanding of the surface-modified resin particles gives expanded beads having an inside region surrounded by a surface region. The heat of fusion of a high temperature peak of the surface region is lower than that of the inside region.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: August 21, 2007
    Assignee: JSP Corporation
    Inventors: Keiichi Hashimoto, Akinobu Hira, Hidehiro Sasaki
  • Patent number: 6956067
    Abstract: Expanded, substantially non-crosslinked polypropylene resin beads capable of producing a high rigidity foamed molding at a relatively low temperature. The beads are produced by a process including a step of dispersing substantially non-crosslinked polypropylene resin particles in a dispersing medium containing an organic peroxide to obtain a dispersion, a step of heating the dispersion to decompose the organic peroxide and to modify the surface of the surface-modified polypropylene resin particles, and a step of expanding the non-crosslinked, surface-modified polypropylene resin particles using a blowing agent.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: October 18, 2005
    Assignee: JSP Corporation
    Inventors: Hidehiro Sasaki, Akinobu Hira, Keiichi Hashimoto, Hisao Tokoro
  • Patent number: 6866936
    Abstract: A water-based coating composition suitable for preparing hydrophilic surfaces on various articles is provided which includes a supporting polymer having functional moieties capable of undergoing crosslinking reactions, said supporting polymer soluble in or emulsified in an aqueous based medium; and a hydrophilic polymer, said hydrophilic polymer associated with the supporting polymer. The composition is characterized in that, when crosslinked at the functional moieties, the supporting polymer forms a three-dimensional network which substantially minimizes disassociation of the hydrophilic polymer.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: March 15, 2005
    Assignee: Surface Solutions Laboratories, Inc.
    Inventor: Margaret P. Opolski
  • Patent number: 6864298
    Abstract: The invention relates to expandable polyolefin beads which comprise blowing agent and have been coated with from 0.01 to 3% by weight of a salt and/or ester of a long-chain fatty acid, preferably with calcium stearate, to prevent caking during foaming.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: March 8, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Maletzko, Uwe Keppeler, Klaus Hahn, Isidor de Grave
  • Publication number: 20040254254
    Abstract: A process for the production of expanded beads, including kneading a base resin containing a polypropylene resin and having a tensile modulus of at least 1,200 MPa together with a mixture of a coloring agent and a thermoplastic polymer having a tensile modulus lower than that of the base resin to form a kneaded mixture including a matrix of the base resin and a multiplicity of domains dispersed in the matrix and each containing the thermoplastic polymer and the coloring agent. The kneaded mixture is formed into resin particles, then treated with an organic peroxide to modify surfaces of the resin particles therewith. Foaming and expanding of the surface-modified resin particles gives expanded beads having an inside region surrounded by a surface region. The heat of fusion of a high temperature peak of the surface region is lower than that of the inside region.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 16, 2004
    Applicant: JSP CORPORATION
    Inventors: Keiichi Hashimoto, Akinobu Hira, Hidehiro Sasaki
  • Patent number: 6800666
    Abstract: Hydrophilic open-celled resilient foams containing melamine-formaldehyde resins, characterized by a droplet absorption rate of less than 5 seconds and an EU standard EN ISO 14184-1 formaldehyde emission of less than 100 mg of formaldehyde/kg of foam, and obtainable by (a) heating an aqueous solution or dispersion each containing at least a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a curing agent to form a foam and crosslink the precondensate, (b) then conditioning the foam at from 120 to 300° C. for from 1 to 180 minutes to remove volatiles, and (c) treating the foam during the conditioning or thereafter with at least one hydrophilicizer and/or with ozone, a corona discharge or a plasma, are useful in hygiene articles to acquire, distribute and immobilize body fluids.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: October 5, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Joachim Hähnle, Horst Baumgartl, Martin Beck, Norbert Herfert, Bernhard Mohr, Jürgen Huff
  • Patent number: 6746759
    Abstract: A resin mixture for forming a stable closed cell foam contains a phenolic resole, a chain extending agent, and as curing agents, a base, and an ester and/or an aliphatic carbonate. The chain extending agent is especially an epoxy resin and/or a phenolic novalak resin.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: June 8, 2004
    Assignee: Kingspan Industrial Insulation Limited
    Inventors: Mark Stanley Harris, Vincent Coppock, Norman Ryder, Graham Morgan Edgerley
  • Patent number: 6743830
    Abstract: The present invention discloses a composition of matter for use in wallboard in the construction that has a morphology of pores and a network of interconnected inorganic particles that are coated with a thin layer of organic binder. The process used to produce the wallboard can use either hydrophobic or hydrophilic prepolymers or preferably both to create the desired network of coated inorganic particles. A preferred embodiment uses at least one hydrophobic constituent and a decomposition reaction that produces a gas to form one or more layers or a gradient of the morphology in one or more layers to create wallboard products with superior properties to those wallboard products now known.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: June 1, 2004
    Assignee: Innovative Construction and Building Materials
    Inventors: David S. Soane, Christopher D. Tagge, Jacob Freas Pollock
  • Patent number: 6667350
    Abstract: An insect resistant foam building material includes calcium borate incorporated therein in sufficient quantity to provide insect resistance. Calcium borate may be incorporated in expanded polystyrene or extruded polystyrene foam materials as part of the foam manufacturing process. The resulting insect resistant calcium borate infused foam material is non-toxic to humans and resistant to leaching out of the protective calcium borate compound from the foam material under high moisture conditions.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: December 23, 2003
    Assignee: Plymouth Foam, Incorporated
    Inventor: George G. Satula
  • Patent number: 6646018
    Abstract: An anti-lumping agent for use with expandable polystyrene beads is disclosed. The expandable polystyrene beads comprise a styrene or styrene derivative polymer in combination with a blowing agent. Typical blowing agents are C3-C6 hydrocarbons, with pentane being especially preferred. The anti-lumping agents include block copolymers formed from blocks of ethylene oxide and propylene oxide. Preferably, the copolymers have a number average molecular weight of from about 4,000 to 15,000, and a hydrophilic-lipophilic balance number of from about 16 to 29. The anti-lumping agents significantly reduce the lumping potential of the expandable polystyrene beads, especially when they are expanded to low densities of from about 1.5 to 0.75 lbs. per cubic foot, and more preferably to densities of from about 1.2 to 0.85.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: November 11, 2003
    Assignee: BASF Corporation
    Inventors: Ronald Gabbard, Bernhard Schmied, Eric R. Weisenbach, Robert D. Ober
  • Publication number: 20030073752
    Abstract: An anti-lumping agent for use with expandable polystyrene beads is disclosed. The expandable polystyrene beads comprise a styrene or styrene derivative polymer in combination with a blowing agent. Typical blowing agents are C3-C6 hydrocarbons, with pentane being especially preferred. The anti-lumping agents include block copolymers formed from blocks of ethylene oxide and propylene oxide. Preferably, the copolymers have a number average molecular weight of from about 4,000 to 15,000, and a hydrophilic-lipophilic balance number of from about 16 to 29. The anti-lumping agents significantly reduce the lumping potential of the expandable polystyrene beads, especially when they are expanded to low densities of from about 1.5 to 0.75 lbs. per cubic foot, and more preferably to densities of from about 1.2 to 0.85.
    Type: Application
    Filed: September 18, 2002
    Publication date: April 17, 2003
    Inventors: Ronald Gabbard, Bernhard Schmied, Eric R. Weisenbach, Robert D. Ober
  • Patent number: 6476087
    Abstract: A method of manufacturing syntactic foam is disclosed which includes the steps of combining a polymer, microspheres and a solvent to form a slurry. At least a portion of the solvent is removed through a porous wick, and conditions are applied which substantially solidify the polymer.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: November 5, 2002
    Inventor: Roberto De Toffol
  • Patent number: 6476088
    Abstract: Polyolefin foam bead having a high-density crust and a method for manufacturing the same are disclosed. The novel polyolefin foam bead having an surface layer (crust) which is higher in density than its inner structure can be manufactured by the method comprised of impregnating a polyolefin resin with a forming agent by stirring the mixture of the polyolefin resin particles, water and the foaming agent in a pressure vessel under heat, followed by diffusing out the foaming agent from the surface layer of the resin particle to decrease the concentration of the foaming agent in the surface layer. Thereafter, the polyolefin resin is foamed by discharging the resin particles to low pressure environment.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: November 5, 2002
    Assignee: Howtech Corporation Ltd.
    Inventors: Moon Jo Chung, Nak Joong Kim
  • Patent number: 6444714
    Abstract: A process for preparing expandable particulate styrene polymers wherein from 5 to 50% by weight of expanded graphite and also, if desired, from 2 to 20% by weight of a phosphorus compound, are present as flame retardants, by suspension polymerization of styrene in the presence of the flame retardants.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: September 3, 2002
    Assignee: BASF Aktiengesellshaft
    Inventors: Guiscard Glück, Franz-Josef Dietzen, Klaus Hahn, Gerd Ehrmann
  • Publication number: 20020037992
    Abstract: Bush 1 comprises back metal layer 2 made from a steel plate and porous sintered metal layer 4 made from copper, provided on the surface of back metal layer 2 through copper plating layer 3 and impregnated and coated with sliding material 5 within and on the surface of porous sintered metal layer 4, where sliding material 5 comprises PTFE as the main component (not less than 50 vol. % of the entire material), 3-40 vol. % of Bi particles and/or Bi alloy particles, 1-40 vol. % of injection moldable fluororesin such as PFA, etc., 0.1-20 vol. % of hard particles such a W, Al2O3, etc., and 0.1-20 vol. % of a solid lubricant such as graphite, etc. The sliding material based on PTFE as the main component is free from lead and can further improve the wear resistance, while maintaining good sliding characteristics.
    Type: Application
    Filed: July 27, 2001
    Publication date: March 28, 2002
    Applicant: DAIDO METAL COMPANY
    Inventors: Takahiro Niwa, Hideki Iwata, Nobutaka Hiramatsu, Takayuki Shibayama
  • Patent number: 6355698
    Abstract: It provides a blowing agent which is significantly inhibited from solidification and is exceedingly useful as a blowing agent satisfactory in flowability, dispersibility into resins, and the like, even after the lapse of a prolonged period of time, and a process for producing the same. The blowing agent of the present invention is substantially anhydrous blowing agent, and it is obtained by treating a blowing agent with a surface-treating agent capable of removing water from the blowing agent, followed by optionally heating during or after the treatment.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: March 12, 2002
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Tsukasa Maekawa, Nobuyuki Ueda, Sadafumi Shono, Yoshifumi Tachi, Shigeru Sumitomo
  • Publication number: 20020025988
    Abstract: It provides a blowing agent which is significantly inhibited from solidification and is exceedingly useful as a blowing agent satisfactory in flowability, dispersibility into resins, and the like, even after the lapse of a prolonged period of time, and a process for producing the same.
    Type: Application
    Filed: March 22, 2000
    Publication date: February 28, 2002
    Inventors: TSUKASA MAEKAWA, NOBUYUKI UEDA, SADAFUMI SHONO, YOSHIFUMI TACHI, SHIGERU SUMITOMO
  • Patent number: 6350511
    Abstract: The invention relates to open-celled melamine foams which have improved fire performance and whose cell-structure surface has been to some extent or entirely coated with an ammonium salt.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: February 26, 2002
    Assignee: BASF Aktiengesellschaft
    Inventor: Arnd Thom
  • Publication number: 20020018898
    Abstract: A water-based coating composition suitable for preparing hydrophilic surfaces on various articles is provided which includes a supporting polymer having functional moieties capable of undergoing crosslinking reactions, said supporting polymer soluble in or emulsified in an aqueous based medium; and a hydrophilic polymer, said hydrophilic polymer associated with the supporting polymer. The composition is characterized in that, when crosslinked at the functional moieties, the supporting polymer forms a three-dimensional network which substantially minimizes disassociation of the hydrophilic polymer.
    Type: Application
    Filed: May 15, 2001
    Publication date: February 14, 2002
    Inventor: Margaret P. Opolski
  • Publication number: 20020004535
    Abstract: Disclosed are (1) a porous polymer particle comprising a polymer substrate having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, (2) an alkali-resistant, high-strength porous polymer particle having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, a part of the ester bonds being saponified and converted to a hydroxyl group(s), (3) a porous polymer particle comprising a polymer substrate having ester bonds connected to a group containing a quaternary ammonium structure through a spacer molecule, the porous polymer particles being treated with an alkaline solution to generate a hydroxyl and/or a carboxyl group on a surface of the substrate, (4) an anion exchanger comprising any one of the particles (1) to (3) above, (5) a packing material for anion chromatography comprising the anion exchanger (4) above, (6) a column for anion chromatography using the anion exchanger (4) above, and (7) a method for meas
    Type: Application
    Filed: March 7, 2001
    Publication date: January 10, 2002
    Inventors: Takashi Kotsuka, Kuniaki Shimbo, Hiroshi Suzuki, Hisako Sakuma, Toshio Tokuda
  • Publication number: 20010041753
    Abstract: The invention relates to open-celled melamine foams which have improved fire performance and whose cell-structure surface has been to some extent or entirely coated with an ammonium salt.
    Type: Application
    Filed: April 5, 2001
    Publication date: November 15, 2001
    Applicant: BASF Aktiengesellschaft
    Inventor: Arnd Thom
  • Patent number: 6277491
    Abstract: An object of the invention is to prevent an oil from penetrating into a vessel obtained from expandable thermoplastic resin beads through molding. The above object is achieved by expandable thermoplastic resin beads whose surface or surface layer is coated or incorporated with a fluorine-containing block copolymer comprising of a fluorine-containing vinyl-type polymer segment derived from a fluorine-containing vinyl-type monomer and a lipophilic vinyl-type polymer segment derived from a lipophilic vinyl-type monomer.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: August 21, 2001
    Assignee: Sekisui Kaseihin Kogyo KabushikiKaisha
    Inventors: Yasuhiro Sakoda, Hiroyuki Takahashi, Masaya Sato, Narihiko Togo
  • Patent number: 6274231
    Abstract: The invention relates to a support provided with super-absorbent material to be manufactured by causing suitable monomers to polymerize in the presence of a catalyst in order to obtain a polymer solution, adding a cross-linking agent to the polymer solution to obtain a pasty composition, subsequently applying the composition on or in a support and allowing the applied composition to dry and cross-link in order to obtain the support with the super-absorbent material, wherein microspheres are added to the paste.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: August 14, 2001
    Assignee: Blydenstein-Willink N.V.
    Inventor: Louis Leonard Weerkamp
  • Patent number: 6271272
    Abstract: The present invention relates to a homogeneous composition of an expandable styrene polymer in the form of beads comprising (a) 100 parts b.w. of a styrene polymer having a weight-average molecular mass of 150,000 to 300,000 and a residual monomer content of less than 2,000 ppm, (b) from 2 to 9 parts by weight of at least one blowing agent comprising n-pentane, (c) from 0.1 to less than 1.0 part by weight of a petroleum wax comprising a mixture of C18 to C80 alkanes, and (d) from 0 to 1.0 part by weight of a nucleating agent chosen from synthetic Fisher-Tropsch or polyolefin waxes. The composition allows the step of pre-expanding the beads to be improved by increasing the rate of expansion of the beads and by improving the productivity of the pre-expansion step, without substantially affecting the final molding step.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: August 7, 2001
    Assignee: BP Chemicals Limited
    Inventors: Christophe Carlier, David Douay, Jean-Marc Galewski
  • Patent number: 6238799
    Abstract: A water-based coating composition suitable for preparing hydrophilic surfaces on various articles is provided which includes a supporting polymer having functional moieties capable of undergoing crosslinking reactions, said supporting polymer soluble in or emulsified in an aqueous based medium; and a hydrophilic polymer, said hydrophilic polymer associated with the supporting polymer. The composition is characterized in that, when crosslinked at the functional moieties, the supporting polymer forms a three-dimensional network which substantially minimizes disassociation of the hydrophilic polymer.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: May 29, 2001
    Assignee: Surface Solutions Laboratories, Inc.
    Inventor: Margaret P. Opolski
  • Patent number: 6225361
    Abstract: The invention provides expanded hollow micro sphere composite beads and a process for producing the beads. According to the invention, finely divided calcium carbonate can be uniformly deposited on expanded hollow thermoplastic polymer micro spheres by a simple procedure without incurring breakage of the expanded micro spheres so that the scattering of beads can be effectively inhibited. The preferred production process comprises admixing expanded hollow thermoplastic polymer micro spheres (A), with colloidal calcium carbonate (B) which has been surface-activated with a surface-treating agent or dispersing agent, e.g. a fatty acid series or polymer acid series compound. The admixing can be typically effected by dry-blending, preferably at a temperature of about 50-100° C.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: May 1, 2001
    Assignees: Akzo Nobel N.V., Japan Fillite Co., Ltd.
    Inventor: Takayuki Nakajima
  • Patent number: 6221926
    Abstract: Foamable modified polystyrene resin particles (E) comprising a particle of a modified polystyrene resin (C) containing a blowing agent (D), wherein the modified polystyrene resin (C) comprises conjugated diene polymer rubber particles (B) dispersed uniformly throughout a polystyrene resin (A) and when the foamable modified polystyrene resin particle (E) is expanded, there is substantially no deformation of the rubber particles (B) before and after the expansion. A foamed article of a modified polystyrene resin which has a cell membrane of the modified polystyrene resin comprising a polystyrene resin and conjugated diene polymer rubber particles dispersed uniformly throughout the polystyrene resin and has a fusion rate of not less than 50%, wherein the rubber particles maintain substantially spherical form in the cell membrane.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 24, 2001
    Assignee: Kaneka Corporation
    Inventors: Hidekazu Oohara, Hidehiro Yamaguchi, Kyoichi Nakamura
  • Patent number: 6214260
    Abstract: A conductive elastomeric foam composite is presented, comprising an elastomer foam and polypyrrole, thiophene, or aniline and derivatives thereof. The foam is manufactured by first diffusing an oxidant into the dense polymer phase of a solvent-swollen foam and then diffusing pyrrole or pyrrole derivative vapor or solution into the dried foam, resulting in an in situ chemical oxidative polymerization of pyrrole at the oxidant site. Only about 5 wt % of conductive polymer is required for observing an insulator to conductor transition. The conductivity of the composite foam can be effectively controlled between 10−7 and 10−1 S/cm by varying either the amount of oxidant used and/or the copolymer composition.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: April 10, 2001
    Assignee: World Properties, Inc.
    Inventors: Michael D. Bessette, Robert A. Weiss, Poh Poh Gan, Can Erkey, Yueping Fu
  • Patent number: 6214895
    Abstract: Nasal, sinus and otic packings exhibiting a less adherent surface when in contact with tissue and being less traumatic on removal are prepared. In a first embodiment, polyvinyl acetal foamed packing material undergoes a surface modification imparting a non-adherent hydrogel coated surface. The surface modification is accomplished after final processing and fabrication of the packing product shape. The packing material is subjected to either an atomized spray of an aqueous solution of ethyl alcohol or a polyvinyl acetate/polyvinyl alcohol copolymer. In another embodiment, a foamed polyvinyl acetal material is produced by crosslinking polyvinyl alcohol with an organic compound containing two hydroxyl reactive groups in the presence of an inert gas. An aqueous solution containing polyvinylpyrrolidone is mixed into the reaction during crosslinking.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: April 10, 2001
    Assignee: Xomed Surgical Products, Inc.
    Inventor: Ronald J. Cercone
  • Patent number: 6153658
    Abstract: A process for the preparation of expandable polymer particles containing a polymer of a vinylarene monomer and a foaming agent, which process comprises:1) polymerizing, by suspension polymerization, 100 parts by weight of a vinylarene monomer, in the presence of 1 to 20 parts by weight of a radical initiator having a half life of 1 hour in benzene at 70 to 110.degree. C., until at least 60% of the vinylarene monomer is polymerized;400 to 4,900 parts by weight additional vinylarene monomer as well as 0.05 to 1% wt, based on the amount of vinylarene monomer added in step 2, of a radical initiator having a half life of 1 hour in benzene at 70 to 110.degree. C. and polymerizing to completion, in which process the blowing agent can be added before, during or after the polymerization process.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: November 28, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Rakesh Jaysinh Paleja, Dominique Paul Vliers, Maria Johanna Willems
  • Patent number: 6150427
    Abstract: Provided are a foaming propylene-ethylene random copolymer which is characterized in that (1) its ethylene unit content [x (wt. %)] falls between 0.2 and 10% by weight, (2) its MI falls between 1 and 16 g/10 min, (3) its boiling diethyl ether extraction [E (wt. %)] and x satisfy the relation of a formula (I):E.ltoreq.0.25x+1.1 (I),(4) its melting point [Tm (.degree. C.)] and x satisfy the relation of a formula (II):Tm.ltoreq.165-5x (II),(5) its isotactic triad fraction in the PPP chain moiety as measured through .sup.13 C.ltoreq.NMR is not smaller than 98 mol %, and preferably, (6) the relation between the time of relaxation .tau. (sec) of the copolymer and MI of the copolymer satisfies a formula (III):.tau..ltoreq.0.80-0.42.times.log MI (III),and also its foaming beads and cellular articles. The copolymer and its foaming beads have improved primary and secondary foamability, and the cellular articles of the copolymer have excellent mechanical properties including rigidity.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: November 21, 2000
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Toshimichi Ito, Yasushi Seta, Ryoichi Tsunori
  • Patent number: 6147130
    Abstract: Process for the production of expandable particles of styrene polymers, having improved processability characteristics, which comprises:i) producing expandable particles of styrene polymers containing from 2 to 20% of an expanding agent incorporated;ii) covering these particles with an antistatic agent in a quantity of less than 1% by weight;iii) vigorously frictioning the particles in a mixing apparatus in order to heat their surface, in a short time, by simple mechanical friction;iv) discharging the particles thus treated from the mixing apparatus.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: November 14, 2000
    Assignee: Enichem S.p.A.
    Inventors: Francesco Anfuso, Dario Ghidoni
  • Patent number: 6136396
    Abstract: An article comprised of a polymeric material bearing a coating. The coating comprises a residual layer formed by applying and allowing to dry a mixture containing from about 7.5 to about 23.5 weight percent of a humidity sensitive antistatic surfactant compound and from about 10 to about 30 weight percent of a water soluble ink. The article possesses an electrostatic potential of from about -5 to about +5 kilovolts as measured at one inch from the coating. A process for producing a formed article which is relatively free from the effects of static electricity. The process includes the steps of topically applying a mixture comprising a humidity sensitive antistatic surfactant compound to a stock comprising a foamed polymeric material, conditioning the foam stock in a humidity-controlled environment effective to reduce electrostatic potential of the stock to between from about -5 to about +5 kilovolts, and thereafter forming the article from the conditioned foam stock.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: October 24, 2000
    Assignee: Tenneco Packaging Inc.
    Inventor: Robin A. Gilmer