Utilizing Plural Mixing Operations In Preparation Of A Solid Polymer Inert Ingredient Concentrate, E.g., Master Batch, Etc. Patents (Class 523/351)
  • Patent number: 7182997
    Abstract: The invention relates to an opaque, white film with a thickness of from 10 to 500 ?m whose principal constituent is a crystallizable thermoplastic. The film comprises at least barium sulfate and at least one optical brightener. The barium sulfate and/or the optical brightener are incorporated directly into the crystallizable thermoplastic or are fed as a masterbatch during film production. At least one surface of the film bears a functional coating with a thickness of from 5 to 100 nm, in order to confer on the film surface an additional function such as sealability, printability, metallizability, sterilizability, antistatic properties, aroma barrier properties or improved adhesion to materials which would not adhere to the film surface without the coating, for example photographic emulsions.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: February 27, 2007
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Klaus Oberlaender
  • Patent number: 7160939
    Abstract: A compound permitting the economic production of packaging containers, which when activated produces concentrated amounts of CO2 gas for extended periods for preservation of perishable products therein, comprises a mixture including a CO2 generating portion incorporated within a polymer matrix. Preferably, the mixture includes citric acid; calcium carbonate, and polyethylene resin. More preferably, the mixture includes a mixture of a carboxylic acid (0.1–40%); a hydrogen carbonate (0.1–40%) and any polyolefin resin. Even more preferably, the mixture includes a mixture including (0.01–40%) Citric Acid; (0.01–40%); and 30–75% polyethylene resin. Most preferably, the mixture includes by weight 12% citric acid; 38% calcium carbonate; and 50% low density polyethylene resin with a melt index of 20 and a density of 0.924 g/cc. Alternatively, the carboxylic acid and hydrogen carbonate components are compounded into separate polymer matrixes, and later combined.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: January 9, 2007
    Inventors: Michael J. Finnegan, Wesley L. Boldt
  • Patent number: 7153895
    Abstract: Disclosed are methods for the formation of a rubber/filler/curative/plasticizer compacted masterbatch which may be performed in two ways. In one embodiment, a rubber and a filler are intimately mixed for a time and under shear conditions sufficient to form a free flowing associated composition, then the composition is mixed with a plasticizer and a curative to form the compacted masterbatch. Alternatively, the starting material may be an already-formed free flowing associated composition of rubber, filler and optional curative, which is mixed with a plasticizer and optional curative to form the compacted masterbatch.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: December 26, 2006
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Joseph M. Hochheiser, Emmanuel G. Kontos, Richard W. Tomlinson
  • Patent number: 7135514
    Abstract: The present invention provides a method and product that provides a dust-free homogeneous dispersion of zinc diacrylate in polybutadiene for use in golf balls. More specifically, the invention relates to a dispersion of zinc diacrylate in a special high-cis grade of polybutadiene commonly used by golf ball manufacturers. We have found that such a dispersion of ZDA can be made by using specific processing promoters, which not only allow the manufacture of the predispersion, but have a beneficial effect on the final properties of the golf ball. The processing promoters of the present invention enable more uniform dispersion of the ZDA into the polymer matrix, eliminate sticking to the mixer rotors, provide improved extrusion and pelletizing rates, as well as function as a separant to greatly minimize, if not totally eliminate, massing of the pelletized product.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: November 14, 2006
    Assignee: Rhein Chemie Corporation
    Inventor: Anders H. Johansson
  • Patent number: 7122586
    Abstract: The invention relates to preparation of silica-rich rubber compositions by a sequence of sequential mixing steps conducted in internal rubber mixer(s) with individual maximum temperature limitations. The mixing steps are comprised of at least two non-productive mixing steps followed by a productive mixing step. The non-productive mixing steps themselves are comprised of at least one preliminary non-productive mixing step followed by a final non-productive mixing step. Elastomer, silica and coupling agent are added in at least one of said preliminary non-productive mixing steps to the exclusion of said final non-productive mixing step and said productive mixing step. Sulfur and sulfur vulcanization accelerator(s) are added in said productive mixing step to the exclusion of said non-productive mixing steps. The preliminary non-productive mixing step(s) are individually conducted to a maximum mixing temperature in a range of from about 150° C.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: October 17, 2006
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Paul Harry Sandstrom, John Eugene Varner, Bernard Matthew Bezilla, Jr.
  • Patent number: 7119134
    Abstract: A method of making a polymeric compound with nanofiller of a predetermined grade. The method includes the steps of providing a base grade of the polymeric material, and mixing a nanofiller concentrate material with the base grade polymeric material in a ratio sufficient to render the predetermined grade of filled polymeric compound, the ratio being nanofiller concentrate material to base grade polymeric material. A method for making the nanofiller concentrate material includes the steps of mixing a high flow carrier resin and a nanofiller to form a mixture, extruding the mixture, and pelletizing the extruded mixture. The mixture may advantageously include colorants, such as pigments or dyes.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: October 10, 2006
    Assignee: General Motors Corporation
    Inventors: David Bruce Reed, Robert A. Ottaviani
  • Patent number: 7091264
    Abstract: A method for improving the feel and rebound velocity of a golf ball, the method comprising preparing a golf ball from a rubber composition that comprises a rubber, from about 3 to about 12 parts by weight of a processing additive per 100 parts by weight rubber, from about 18 to about 32 parts by weight of a multi-functional crosslinking agent per 100 parts by weight rubber, from about 0.2 to about 1.0 parts by weight of a cure initiator per 100 parts by weight rubber, from about 0 to about 25 parts by weight zinc oxide per 100 parts by weight rubber, and from about 0 to about 0.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: August 15, 2006
    Assignee: Firestone Polymers, LLC
    Inventors: Daniel F Graves, Mitch Barry
  • Patent number: 7090915
    Abstract: The present invention relates to an opaque, white UV-stabilized low-flammability film with a thickness of from 10 to 500 ?m whose principal constituent is a crystallizable thermoplastic. It also comprises at least barium sulfate as pigment, at least one flame retardant, at least one UV stabilizer as light stabilizer and at least one optical brightener. The barium sulfate and/or the optical brightener and/or the flame retardant and/or the UV stabilizer here is either incorporated directly into the thermoplastic when the polymer is prepared or fed to the thermoplastic as a masterbatch during film production.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: August 15, 2006
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Klaus Oberlaender
  • Patent number: 7053137
    Abstract: A process for producing cured rubber is disclosed wherein the process comprises: A) mixing rubber, carbon black, and azodicarbonamide without other curative ingredients; B) adding the remaining curative ingredients in one or more subsequent mixing steps; and then C) curing the rubber; whereby a cured rubber having improved hysteresis is obtained. The cured rubber thus obtained is particularly useful in tires and tire treads.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: May 30, 2006
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Joseph F. Stieber, Martin J. Hannon
  • Patent number: 7045202
    Abstract: A long glass fiber filler reinforced resin material for molding includes a masterbatch formed of a composite of a matrix resin with a polypropylene (PP) component and a long glass fiber filler and a diluent resin made from an ethylene-propylene block copolymer. The above-described matrix resin of the masterbatch includes the PP component having a pentad isotactic index of at least 95%, and a melt flow rate (MFR) of the matrix resin of the masterbatch is 100 to 500 g/10 min and larger than six times a melt flow rate of the diluent resin. The long glass fiber filler is in a content of 30 to 50 mass percent with respect to a total mass thereof.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: May 16, 2006
    Assignee: Mazda Motor Corporation
    Inventors: Chikara Tanaka, Takahiro Tochioka
  • Patent number: 7019050
    Abstract: Concentrates and method of making concentrates are disclosed. The concentrates may be incorporated into thermoformable articles as a concentrate powder or as a paste. Thermoformable articles, such as fibers, containing the concentrates and methods of making the thermoformable articles are also disclosed.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: March 28, 2006
    Assignee: BASF Corporation
    Inventors: Frank R. Jones, Stanley A. McIntosh, Gary W. Shore
  • Patent number: 7019084
    Abstract: The present invention relates to the preparation of rubber compositions for tire tread and tire sidewall component applications. A tire is provided having tread of such composition designed for relatively heavy loads such as, for example, truck tires. A tire having a sidewall of such composition is also provided. Such tire component rubber compositions are of rubber compositions reinforced with precipitated silica and selected carbon black in specified amounts and prepared with a prescribed order of addition to the rubber composition and composed of elastomers as a specific combination of high trans styrene-butadiene rubber with natural or synthetic cis 1,4-polyisoprene rubber and cis 1,4-polybutadiene rubber.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: March 28, 2006
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Paul Harry Sandstrom
  • Patent number: 7019063
    Abstract: The rubber composition of the present invention is used for producing an inner liner of a pneumatic tire, and is obtained by compounding a rubber component and a layered or plate-like mineral. The layered or plate-like mineral has an aspect ratio of 3 or more and less than 30. The present invention further provides a production method of the rubber composition and a pneumatic tire which is produced by using the rubber composition. The present invention is applicable to a tire of passenger vehicles, bus or truck, and a tire of airplane. According to the present invention, the air permeation resistance is remarkably improved and the workability is also improved. Therefore, the rapture and hole defect of a non-vulcanized sheet during the tire construction can be avoided. By using the rubber composition, the gauge of the inner liner of pneumatic tire can be reduced while maintaining the inner pressure of tire, thereby reducing the weight of tire.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: March 28, 2006
    Assignee: Bridgestone Corporation
    Inventors: Ichiro Wada, Masashi Ohara, Osamu Uchino, Toshiaki Koura, Naofumi Ezawa, Motoaki Kanoh, Yasuyoshi Kawaguchi, Shun Nakamura
  • Patent number: 7008978
    Abstract: A process is described for the modification of polymer melts by means of finely divided inorganic solid particles (melt modification process), in which a powdery additive which contains the inorganic solid particles with a maximum particle size of 1 ?m embedded in finely divided form in a matrix of an organic substance, the organic substance containing one or more of the substances from the group consisting of polyols, polyglycols, polyethers, dicarboxylic acids and derivatives thereof, AH salt, caprolactam, paraffins, phosphoric acid esters, hydroxycarboxylic acid esters and cellulose, is incorporated into the polymer.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: March 7, 2006
    Assignee: Sachtleben Chemie GmbH
    Inventors: Franz Meyers, Jurgen Kastner, Michael Wedler, Peter Weiser
  • Patent number: 7001937
    Abstract: A process for the production of a colored resin composition, comprising a step (A) of producing an aqueous slurry of a pigment, a step (B) of producing a melting composition of metallocene type polyolefin containing a dispersant and a solvent, a step (C) of kneading the aqueous slurry obtained in the step (A) with the melting composition obtained in the step (B) and a step (D) of removing the solvent and the water from the kneaded mixture obtained in the step (C), a colored composition obtained in the above process has excellent in pigment dispersibility and high color developing properties, a colored resin molded article obtained from the colored resin composition do not give a physical-properties inhibition of 5% or higher and has a color developing properties.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: February 21, 2006
    Assignee: Toyo Ink Mfg. Co., Ltd.
    Inventors: Hitoshi Maki, Masayasu Kawamura, Masashi Koide
  • Patent number: 6998433
    Abstract: Polyolefin-based pallets capable of passing standard pallet flammability tests are prepared by molding the pallet or one or more subassemblies thereof, of a polyolefin molding resin containing a flame retardant package containing magnesium hydroxide, and optionally alumina trihydrate, and zinc borate. The flame retardants may be supplied as a master batch at a concentration higher than that desired in the pallet or subassembly, in a polyolefin-compatible polymer, and result in pallets having a significantly lower heat release rate.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: February 14, 2006
    Assignee: Rehig Pacific Company
    Inventors: Trenton M. Overholt, Justin M. Smyers
  • Patent number: 6953815
    Abstract: The present invention provides a highly economical process for production of an inorganic filler-containing polyolefin resin composition, and a production apparatus to be used for the process, whose process is characterized by carrying out a continuous series of steps from an olefin polymerization step up to a kneading/pelletizing step wherein the polyolefin resin obtained by the polymerization step is kneaded and pelletized with an inorganic filler and various additives.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: October 11, 2005
    Inventors: Takehiko Enomoto, Tamio Serita
  • Patent number: 6939902
    Abstract: A hydrocarbon-soluble drag-reducing suspension is described, along with a process for manufacturing the drag-reducing suspension. The drag-reducing suspension is easily transportable, non-hazardous, easily handled, and provides a significant increase in drag-reducing capability over existing products. The drag-reducing suspension is manufactured by grinding an ultra-high molecular weight polymer in the presence of a grinding aid and mixing it with a suspending fluid.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: September 6, 2005
    Assignee: ConocoPhillips Company
    Inventors: Kenneth W. Smith, Stuart N. Milligan, Ray L. Johnston
  • Patent number: 6939600
    Abstract: The present invention relates to an opaque, white film with a thickness of from 10 to 500 ?m whose principal constituent is a crystallizable thermoplastic. It also comprises at least barium sulfate and at least one optical brightener. The barium sulfate and/or the optical brightener here is either incorporated directly into the thermoplastic during preparation of the polymer or fed as a masterbatch during film production. The novel film is particularly suitable for interior decoration, for constructing exhibition stands, for exhibition requisites, for displays, for placards, for labels, for protective glazing of machines or of vehicles, in the lighting sector, in the fitting out of shops or of stores, as a promotional requisite or a laminating material, or in applications associated with food or drink.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: September 6, 2005
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Klaus Oberlaender, Gottfried Hilkert
  • Patent number: 6908958
    Abstract: An organically modified layered clay ionically bonded with an organic compound having an ammonium group and an amino group, an organic polymer composition containing the same and an organic polymer capable of reacting with the amino group, and an inner liner using the same.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: June 21, 2005
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tsukasa Maruyama, Kazunori Ishikawa, Naoya Amino, Masahiro Ikawa
  • Patent number: 6881781
    Abstract: A non-toxic malleable, bounceable modeling compound stretchable in a manner similar to chewing gum which is particularly suitable for children. The compound is comprised essentially of a butyl rubber, vulcanized vegetable oil, one or more softening agents, an inorganic filler material, antioxidant and binder. The pliable compound can retain a molded shape for years and is an ideal sculpting material, stress reliever, and aid for improving dexterity. The compound is produced according to a tri-phase process that does not require heating or baking.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: April 19, 2005
    Assignee: The Wingum Company
    Inventor: Guillermo Gamba
  • Patent number: 6875805
    Abstract: An acrylic material which is flame retardant comprises 4.9 to 94.9% by wt of an acrylic composition, 5-95% by wt of a halogen-containing polymer, especially PVC, and 0.1-25% by wt of an inorganic composition comprising at least one of an oxide, hydroxide, carbonate, borate, stearate, chloride or bromide, zinc, magnesium, molybdenum, antimony, aluminum, tin, copper, manganese, cobalt or iron.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: April 5, 2005
    Assignee: Lucite International UK Limited
    Inventors: Paul Eustace, Neil Andrew McCathy, Nicholas John Marston
  • Patent number: 6849677
    Abstract: Polyolefin-based pallets capable of passing standard pallet flammability tests are prepared by molding the pallet or one or more subassemblies thereof, of a polyolefin molding resin containing a flame retardant package containing a halogenated organic flame retardant, alumina trihydrate, and antimony trioxide. The flame retardants are advantageously supplied as a master batch at a concentration higher than that desired in the pallet or subassembly, in a polyolefin-compatible polymer.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: February 1, 2005
    Assignee: Rehrig Pacific Company
    Inventor: Trenton M. Overholt
  • Patent number: 6828361
    Abstract: A method for making a silicic acid containing rubber base composition includes providing composition ingredients of rubber, silicic acid, silane and additional additives except for vulcanization ingredients. First and second mixers separate from each other are provided wherein the ingredients except for the vulcanization ingredients can be mixed. All of the composition ingredients are introduced into the first mixer except for the vulcanization ingredients simultaneously or at time intervals. The composition ingredients introduced into the first mixer are mixed to a composition. The composition formed in the first mixer is transferred directly into the second mixer without an intermediate storage thereof. The transferred composition formed in the first mixer is mixed at least almost to completion in the second mixer with the temperature lying in the temperature range of 130° C. to 180° C.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: December 7, 2004
    Assignees: Continental Aktiengesellschaft
    Inventors: Julius Peter, Winfried Heidrich, Dirk Gross, Heinrich Sandau
  • Patent number: 6825251
    Abstract: A unique treatment for pigments is provided. This treatment, which uses certain organo-acid phosphate molecules, imparts improved physical and chemical qualities including lacing resistance, improved dispersion and decreased chemical reactivity when these treated pigments are incorporated into polymeric matrices.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: November 30, 2004
    Assignee: Millennium Inorganic Chemicals, Inc.
    Inventors: Modasser El-Shoubary, Robert J. Kostelnik
  • Patent number: 6815473
    Abstract: The present invention relates to a cross-linkable or cross-linked rubber composition having improved hysteresis properties in the cross-linked state which is useful for constituting a tire tread, to a process for preparation of such a cross-linkable composition, to a tread of this type and to a tire having reduced rolling resistance. The rubber composition according to the invention is based on: an elastomeric matrix comprising at least one diene elastomer which comprises a carboxylic acid function at one or at each of its two chain ends, and a reinforcing filler comprising a reinforcing inorganic filler, wherein said diene elastomer has a molecular weight which is greater than 80,000 g/mol, and it is present in a majority quantity in said elastomeric matrix.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: November 9, 2004
    Assignee: Michelin Recherche Et Technique S.A.
    Inventors: Pierre Robert, Jean-Michel Favrot, Corinne Fradin-Cohas
  • Patent number: 6806302
    Abstract: The invention relates to a process for the continuous production of liquid coating compositions by introducing one or more low-solvent or solvent-free binders in a solid or molten state into an extruder in one stage, together with pigments and auxiliaries, wherein the components are mixed and dispersed at elevated temperature in a viscous state, then introducing proportions of binders and proportions or organic or inorganic solvents into the extruder in one or more following stages, discharging the mixture from the extruder and adding further solvents and optionally further components of the coating composition and homogenizing the process mixture in one or more rotor/stator mixers.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: October 19, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Evert Kramer, Friedrich Domke
  • Patent number: 6797749
    Abstract: The invention provides a powder coating composition in which powder particles are an agglomerate of individual particulate components fused or bonded together into composite particles. Maximizing the amount of larger-sized uncolored component(s) gives cost advantages, and the invention allows a rapid and flexible manufacture of a range of colored powder coating compositions.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: September 28, 2004
    Assignee: International Coatings Limited
    Inventor: Andrew George Cordiner
  • Patent number: 6794430
    Abstract: The process for manufacturing polymer granules includes the operations of mixing a base polymer and additives, with a specific step of adding shading colorant to the cured polymer mixture followed by a step of carrying out an incomplete homogenization of the colorant with the polymer mixture, the duration of which is fixed according to desired colouring anisotropy characteristics, the process providing granules having such an anisotropy which can be used for the manufacturing of coatings and moulded articles.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: September 21, 2004
    Assignee: Etablissements Boulenger
    Inventors: Jacques Berlemont, Xavier Poupon
  • Patent number: 6794432
    Abstract: The invention concerns transparent, flame-retardant, single layered or multilayered thermoformable films, containing a crystallizable thermoplastic material, preferably polyethyleneterephthalate, and at least one flame retarding agent as main components. Said films are characterized by good stretchability, thermoformability and good mechanical and optical properties, which makes them and the shaped bodies made from said films suitable for both inner and outer applications.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 21, 2004
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Andreas Stopp, Guenther Crass
  • Patent number: 6787588
    Abstract: A process for transforming a polymer base, having a shaded appearance of anisotropic coloring, into a finished article, the process including operations of mixing a base polymer and additives, of adding a shading colorant to the polymer mixture, followed by incomplete homogenization of the shading colorant in the polymer mixture to form the polymer base with a shaded appearance of anisotropic coloring, subsequent shaping to an intermediate predetermined shape, and vulcanization and cooling as applicable, and then an operation of breaking up the shaded polymer base into individualized elements and an operation of aggregation of the elements, to obtain the finished article, in any desired arrangement. It also relates to a finished article, having such anisotropy, constituted by an agglomerate of individualized elements, and its application as a surface coating.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: September 7, 2004
    Assignee: Etablissements Boulenger
    Inventors: Jacques Berlemont, Xavier Poupon
  • Patent number: 6780916
    Abstract: A resin composition provides good optical properties when stretched and efficient oxygen-scavenging, the resin composition comprising a film-forming polyester and an effective amount of oxygen-scavenging particles, wherein the particles have a particle size distribution such that particles of less than about 25 microns in size do not exceed a concentration defined by a formula that includes the apparent density of the particles. Another resin composition comprises a film-forming polyester and from about 50 to about 2500 parts by weight of iron per million by weight of the resin, wherein the amount of iron particles having a size of less than about 20 microns does not exceed about 800 parts per million by weight of the resin. A method is also provided for incorporating high levels of oxygen-scavenging particles into a film-forming polyester resin composition with low haze when stretched.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: August 24, 2004
    Assignee: M & G USA Corporation
    Inventors: Deborah Tung, Edwin A. Sisson, Roy A. Leckonby
  • Patent number: 6780918
    Abstract: Process for the preparation of protective colloid-stabilized aqueous dispersions.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: August 24, 2004
    Assignee: PolymerLatex GmbH & Co.KG.
    Inventor: Davide Brizzolara
  • Patent number: 6770695
    Abstract: An implant composition having controlled resorption rate in vivo for stimulating bone growth, a method of making the implant composition, and a kit of implant materials are disclosed. The implant composition includes a calcium sulfate compound, polymer containing particles, and a setting agent for setting the calcium sulfate compound and the polymer containing particles into a heterogeneous solid composition. Upon setting, the calcium sulfate compound forms a matrix and the polymer containing particles settled within the matrix. The resorption rate of the implant composition in vivo can be controlled of between eight and twenty-four weeks, which substantially matches the rate of bone growth. The implant composition of the present invention can be used for the repair, augmentation, and other treatment of bone.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: August 3, 2004
    Inventors: John L. Ricci, Harold Alexander, Bruce Hollander
  • Patent number: 6770697
    Abstract: The invention includes a process for preparing an improved melt-strength polyolefin blend by incorporating a polyolefin/clay nanocomposite product. The nanocomposite-modified polyolefin blend is used to form articles through processing operations that involve stretching and/or drawing, such as thermoforming, melt spinning, blow molding and foaming. The addition of the nanocomposite product to the polyolefin blend improves the sag resistance of the polyolefin and broadens the processing window of the operation.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: August 3, 2004
    Assignee: Solvay Engineered Polymers
    Inventors: Marta Drewniak, Xia Zhao, Satchit Srinivasan
  • Patent number: 6767943
    Abstract: Flame resistant graft polymer-modified polycarbonate molding compositions are described. The polycarbonate molding compositions comprise phosphorous compounds, and a coagulated mixture of flourinated polyolefins or precompound fluorinated polyolefins. Polycarbonate molding compositions according the present invention are flame retardant, and have desirable mechanical properties, e.g., notched impact strength and elongation at break.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: July 27, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eckel, Michael Zobel, Dieter Wittmann, Torsten Derr, Bernd Keller
  • Publication number: 20040132865
    Abstract: A method to reduce haze in the production of fire resistant polycarbonate compositions comprising flame retardant salts, wherein the salt is blended with a first polycarbonate to form a concentrate, and the concentrate is then added to a second polycarbonate resin.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 8, 2004
    Inventors: Eric Thomas Gohr, Niles Richard Rosenquist, Rajendra Kashinath Singh, Gregory James Stoddard, Shahrzad Zarkoob, Johannes Martinus Dina Goossens
  • Patent number: 6756427
    Abstract: Provided is a process for producing a thermoplastic resin composition of low specific gravity containing hollow spheres by a melt processing extrusion method, wherein a melt-kneading extruder equipped with a screw is used and the extruder has an upper stream side supplying portion at the upper stream part of the extrusion direction, and a lower stream side supplying portion at the lower stream part from said upper stream side supplying portion, and the ratio (L/D) of the distance (L) between said upper stream side supplying portion and said lower stream side supplying portion to the diameter (D) of a screw is 4-30 (L and D are the same scale units); and under screw rotation, a thermoplastic resin having a specific gravity of 1.10 or more is supplied from the upper stream side supplying portion, and hollow spheres in an amount of 2-50 parts by weight based on 100 parts by weight of the thermoplastic resin are supplied from the lower stream side supplying portion.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: June 29, 2004
    Assignee: Sumitomo Chemical Company Limited
    Inventor: Mituo Maeda
  • Publication number: 20040122154
    Abstract: A method of making a polymeric compound with nanofiller of a predetermined grade. The method includes the steps of providing a base grade of the polymeric material, and mixing a nanofiller concentrate material with the base grade polymeric material in a ratio sufficient to render the predetermined grade of filled polymeric compound, the ratio being nanofiller concentrate material to base grade polymeric material. A method for making the nanofiller concentrate material includes the steps of mixing a high flow carrier resin and a nanofiller to form a mixture, extruding the mixture, and pelletizing the extruded mixture. The mixture may advantageously include colorants, such as pigments or dyes.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 24, 2004
    Inventors: David Bruce Reed, Robert A. Ottaviani
  • Patent number: 6753363
    Abstract: A polyacetal resin composition of high flame retardancy and stability comprises a polyacetal resin, a flame retardant, and a basic nitrogen-containing compound (urea, amidine, aminotriazine, hydrazine, derivatives thereof, amide, urethane). The flame retardant may comprise an aromatic compound reactive to formaldehyde and a phosphorus-containing compound (e.g., red phosphorus, organic phosphonates, organic phosphinates, ammonium polyphosphate, and other phosphoric acid salts, phosphates), and the aromatic compound may be a hydroxyl group and/or amino group-containing compound or an aromatic ring-containing resin (e.g., novolak resins, aralkyl resins, vinylphenol resins, aniline resins, aromatic nylon resins, polycarbonate resins, polyarylate resins, aromatic epoxy resins, aromatic polyether resins). The ratio of the phosphorus-containing compound per 100 parts by weight of the aromatic compound is 1 to 500 parts by weight.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: June 22, 2004
    Assignee: Polyplastics Co., Ltd.
    Inventor: Hatsuhiko Harashina
  • Patent number: 6743853
    Abstract: Provided are a viscosity stabilizer comprising carbon black and/or silica and further blended with at least one selected from the group consisting of a plasticizer, a processing aid, a softening agent and a dispersant, a viscosity-stabilized natural rubber composition blended with the viscosity stabilizer described above in an amount of 5 to 80 parts by weight per 100 parts by weight of natural rubber, a process for producing a viscosity-stabilized natural rubber composition, which comprises adding the viscosity stabilizer described above to natural rubber in producing a natural rubber master batch, and a method of controlling a rise in the viscosity of natural rubber, which comprises adding the viscosity stabilizer described above to natural rubber in producing a natural rubber master batch.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: June 1, 2004
    Assignee: Bridgestone Corporation
    Inventor: Kuninori Mitarai
  • Patent number: 6740276
    Abstract: A process of making a pigmented shaped article comprising: (a) providing polytrimethylene terephthalate chips and two or more colored pigmented chips each containing at least one different color pigment; (b) heating the polytrimethylene terephthalate chips and colored pigmented chips to a temperature of about 200-about 280° C. to melt the chips and form a polymer composition comprising the polytrimethylene terephthalate and at least one color pigment; and (c) forming a shaped article from the polymer composition.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: May 25, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Nirmal K. Agarwal, Jing C. Chang, Richard Lee Dommel, Joseph V. Kurian, Raymond Longhi
  • Patent number: 6734230
    Abstract: A procedure for the production of a modified acrylic sheet with high impact resistance, of the type in which a prepolymerization is done of a mix of monomers with a polymer of dissolved dienic monomers. The procedure is done in batches at low temperatures without there being a separation of the polymer of dienic monomers from the rest of the mix. The procedure facilitates obtaining a modified acrylic sheet with high impact resistance whose transmittance is kept after being subjected to an accelerated degradation, and whose impact properties are not reduced more than 50% after said accelerated degradation.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: May 11, 2004
    Assignee: Plastiglas de Mexico, S.A. de C.V.
    Inventors: Sergio Colin Escobar, Manuel Ahumada Romero, José Luis Pe{overscore (n)}a Rosas, Maria Sonia Limon Rodriguez, Luis Enrique Mille Loera, Leopoldo Vilchis Ramirez
  • Patent number: 6730720
    Abstract: A method to reduce haze in the production of fire resistant polycarbonate compositions comprising flame retardant salts, wherein the salt is blended with a first polycarbonate to form a concentrate, and the concentrate is then added to a second polycarbonate resin.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: May 4, 2004
    Assignee: General Electric Company
    Inventors: Eric Thomas Gohr, Niles Richard Rosenquist, Rajendra Kashinath Singh, Gregory James Stoddard, Shahrzad Zarkoob, Johannes Martinus Dina Goossens
  • Patent number: 6719941
    Abstract: The invention provides a process for the preparation of a moulded polymer item, said process comprising obtaining a polymer moulding powder having a mean particle size of 1 to 2000 &mgr;m comprising an admixture of UV-stabilizer-loaded polymer particles and non-UV-stabilizer-loaded polyolefin polymer particles, loading said powder into a mould, heating and rotating said mould to melt said powder, cooling said mould, and releasing said moulded polymer item from said mould.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: April 13, 2004
    Assignee: Borealis Technology Oy
    Inventors: Astrid Frohaug, Anders Storen Sandaas, Anne-Marie Fatnes
  • Patent number: 6716902
    Abstract: A transparent, flame retardant polycarbonate composition consisting essentially of an aromatic polycarbonate resin and a flame-retarding amount of a guanidine salt or derivatives thereof, wherein the amount of guanidine salt or derivatives thereof is about 1 wt. % or less.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: April 6, 2004
    Assignee: General Electric Company
    Inventors: James Ross Fishburn, Erwin Marie Alfred Gijzen, Johannes Martinus Dina Goossens, Walter van der Heijden, Henricus Hubertus Maria van Hout, Hendrik Verhoogt
  • Publication number: 20040048953
    Abstract: A method and apparatus for manufacturing small batches of solid paint is disclosed, which method includes a first step of providing a component of the solid paint as a liquid in a heated mixing container that has a base and sides and includes a stirrer for stirring the contents of the container. The next step of the method includes controlling, heating and stirring of the contents of the container and progressively adding other components of the solid paint as solids to the container. The liquid acts as a heat transfer medium that transfers heat from the heated container and from the stirrer to the solids. The mix is heated to a temperature of the solid paint and forms a melt that is a uniform liquid. The final step in the method includes discharging the melt from the container and allowing the melt to cool and form the solid paint.
    Type: Application
    Filed: September 25, 2003
    Publication date: March 11, 2004
    Inventor: Garry Michael McKay
  • Patent number: 6683123
    Abstract: A process for producing a thermoplastic molding composition is disclosed. The process entails introducing a solid polymeric resin, optionally containing residual moisture, into an extruder, operating under conditions designed to melt the resin and charging water into the melt while in the extruder to yield wet, molten resin that contains water in an amount of at least about 2 percent. The wet, molten resin is then devolatilized to yield dry resin having water content not exceeding 0.3 percent. Molding compositions thus produced have improved properties. In a preferred embodiment, the process results in a molding composition that contains a fine dispersion of a discontinuous phase in a continuous polymeric phase.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: January 27, 2004
    Assignee: Bayer Polymers LLC
    Inventor: Henry A. Kozlowski
  • Publication number: 20030236322
    Abstract: The present invention relates to a method for dry coalescing and kneading powders, for the exfoliation thereof, comprising the steps of providing a polytetrafluoro-ethylene aqueous suspension or emulsion, stirring to flocculate the emulsion, fully drying the emulsion and dispersing the obtained concentrated material through the powders to be processed.
    Type: Application
    Filed: May 8, 2003
    Publication date: December 25, 2003
    Inventor: Angelo Murer
  • Patent number: 6653368
    Abstract: The present invention discloses a method for producing a uniform synthetic rubber mixture for formation into a golf ball core. The present invention utilizes mixing 50% to 80% of a base rubber material with zinc diacrylate and other materials, and later mixing the entirety of the base rubber material in order to prevent adhesion and loss of zinc diacrylate. The partial mixing allows for the zinc diacrylate to be dispersed throughout the mixture thereby creating a core with more uniform properties.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: November 25, 2003
    Assignee: Callaway Golf Company
    Inventors: Daniel B. Jackson, Amado M. Garcia