Utilizing Plural Mixing Operations In Preparation Of A Solid Polymer Inert Ingredient Concentrate, E.g., Master Batch, Etc. Patents (Class 523/351)
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Patent number: 6794430Abstract: 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: GrantFiled: December 10, 2001Date of Patent: September 21, 2004Assignee: Etablissements BoulengerInventors: Jacques Berlemont, Xavier Poupon
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Patent number: 6787588Abstract: 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: GrantFiled: October 23, 2002Date of Patent: September 7, 2004Assignee: Etablissements BoulengerInventors: Jacques Berlemont, Xavier Poupon
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Patent number: 6780916Abstract: 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: GrantFiled: July 26, 2001Date of Patent: August 24, 2004Assignee: M & G USA CorporationInventors: Deborah Tung, Edwin A. Sisson, Roy A. Leckonby
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Patent number: 6780918Abstract: Process for the preparation of protective colloid-stabilized aqueous dispersions.Type: GrantFiled: February 14, 2003Date of Patent: August 24, 2004Assignee: PolymerLatex GmbH & Co.KG.Inventor: Davide Brizzolara
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Patent number: 6770697Abstract: 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: GrantFiled: February 7, 2002Date of Patent: August 3, 2004Assignee: Solvay Engineered PolymersInventors: Marta Drewniak, Xia Zhao, Satchit Srinivasan
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Patent number: 6770695Abstract: 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: GrantFiled: August 1, 2001Date of Patent: August 3, 2004Inventors: John L. Ricci, Harold Alexander, Bruce Hollander
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Patent number: 6767943Abstract: 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: GrantFiled: September 25, 2001Date of Patent: July 27, 2004Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Michael Zobel, Dieter Wittmann, Torsten Derr, Bernd Keller
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Publication number: 20040132865Abstract: 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: ApplicationFiled: December 17, 2003Publication date: July 8, 2004Inventors: Eric Thomas Gohr, Niles Richard Rosenquist, Rajendra Kashinath Singh, Gregory James Stoddard, Shahrzad Zarkoob, Johannes Martinus Dina Goossens
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Patent number: 6756427Abstract: 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: GrantFiled: April 27, 2001Date of Patent: June 29, 2004Assignee: Sumitomo Chemical Company LimitedInventor: Mituo Maeda
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Publication number: 20040122154Abstract: 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: ApplicationFiled: December 13, 2002Publication date: June 24, 2004Inventors: David Bruce Reed, Robert A. Ottaviani
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Patent number: 6753363Abstract: 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: GrantFiled: March 8, 2001Date of Patent: June 22, 2004Assignee: Polyplastics Co., Ltd.Inventor: Hatsuhiko Harashina
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Patent number: 6743853Abstract: 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: GrantFiled: December 5, 1997Date of Patent: June 1, 2004Assignee: Bridgestone CorporationInventor: Kuninori Mitarai
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Patent number: 6740276Abstract: 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: GrantFiled: June 29, 2001Date of Patent: May 25, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Nirmal K. Agarwal, Jing C. Chang, Richard Lee Dommel, Joseph V. Kurian, Raymond Longhi
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Patent number: 6734230Abstract: 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: GrantFiled: July 8, 2002Date of Patent: May 11, 2004Assignee: 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
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Patent number: 6730720Abstract: 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: GrantFiled: December 27, 2000Date of Patent: May 4, 2004Assignee: General Electric CompanyInventors: Eric Thomas Gohr, Niles Richard Rosenquist, Rajendra Kashinath Singh, Gregory James Stoddard, Shahrzad Zarkoob, Johannes Martinus Dina Goossens
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Patent number: 6719941Abstract: 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: GrantFiled: May 18, 2001Date of Patent: April 13, 2004Assignee: Borealis Technology OyInventors: Astrid Frohaug, Anders Storen Sandaas, Anne-Marie Fatnes
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Patent number: 6716902Abstract: 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: GrantFiled: August 26, 2002Date of Patent: April 6, 2004Assignee: General Electric CompanyInventors: James Ross Fishburn, Erwin Marie Alfred Gijzen, Johannes Martinus Dina Goossens, Walter van der Heijden, Henricus Hubertus Maria van Hout, Hendrik Verhoogt
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Publication number: 20040048953Abstract: 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: ApplicationFiled: September 25, 2003Publication date: March 11, 2004Inventor: Garry Michael McKay
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Patent number: 6683123Abstract: 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: GrantFiled: September 12, 2000Date of Patent: January 27, 2004Assignee: Bayer Polymers LLCInventor: Henry A. Kozlowski
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Publication number: 20030236322Abstract: 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: ApplicationFiled: May 8, 2003Publication date: December 25, 2003Inventor: Angelo Murer
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Patent number: 6653368Abstract: 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: GrantFiled: March 15, 2002Date of Patent: November 25, 2003Assignee: Callaway Golf CompanyInventors: Daniel B. Jackson, Amado M. Garcia
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Patent number: 6649684Abstract: Described are fillers, e.g., inorganic oxides, that have been chemically treated to have a carbon content of greater than 1 weight percent, a mercapto content of at least 0.15 weight percent, a Silane Conversion Index of at least 0.3 and a Standard Reinforcement Index of 4 or more. Polymeric compositions that contain such treated fillers are also described.Type: GrantFiled: August 11, 2000Date of Patent: November 18, 2003Assignee: PPG Industries Ohio, Inc.Inventor: Timothy A. Okel
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Patent number: 6646028Abstract: A process is provided for making a carbon-filled rubber having a uniform dispersion of nanometric-sized carbon black particles. Fluffy carbon black is received as a slurry in water and added to latex rubber before or during coagulation in an emulsion styrene butadiene rubber plant, or fluffy carbon black is similarly incorporated in rubber using a different type of rubber-manufacturing process. A uniform dispersion of smaller-than-usual carbon black particles in rubber is formed, which provides a black masterbatch rubber with superior mechanical and rheological properties. Ash and grit is removed from the fluffy carbon black slurry, which further improves the properties of the carbon-filled rubber by reducing defects in the rubber caused by the ash or grit.Type: GrantFiled: December 5, 2001Date of Patent: November 11, 2003Assignee: CID Centro de Investigacion y Desarrollo Tecnologico, S.A. de C.V.Inventors: Francisco Lopez-Serrano Ramos, Luis Enrique Mille Loera, Angel Garcia Garza
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Publication number: 20030203993Abstract: A method of molding a rubber product from a rubber compound by a molding apparatus having a kneading region. A full amount of carbon black (CB) and a full amount of process oil, together with other auxiliary materials except vulcanizing chemicals, are compounded with raw rubber to thereby knead and prepare a granular master batch (granular MB) . The rubber product is extrusion-molded and vulcanized after vulcanizing chemicals (a vulcanizing agent and a vulcanization accelerator) are quantitatively supplied into the kneading region of the molding apparatus through a material supply port while the vulcanizing chemicals are mixed with the granular MB.Type: ApplicationFiled: April 21, 2003Publication date: October 30, 2003Inventors: Gunpei Katsumura, Tomoaki Okita
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Patent number: 6632855Abstract: A plastics material comprises an acrylic polymer containing 5-50% of a rubbery copolymer and a biocidal compound. The plastic material is useful as a component of a refrigerator, worktop etc. or as a building material. The material may be used as a coating for a substrate. Method of manufacturing laminate materials comprising the plastics material are also claimed.Type: GrantFiled: January 3, 2000Date of Patent: October 14, 2003Assignee: Lucite International UK LimitedInventors: Gordon Maxwell Beverly, Michael John Ellacott
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Publication number: 20030191224Abstract: 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: ApplicationFiled: March 26, 2003Publication date: October 9, 2003Inventors: Tsukasa Maruyama, Kazunori Ishikawa, Naoya Amino, Masahiro Ikawa
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Publication number: 20030160358Abstract: The invention relates to a process for melt-shaping a polymer composition wherein the constituent components for the polymer composition are supplied directly to the shaping device in the form of a mixture of granules on or in which the constituent components are present. The granule mixture contains at least 3 granule-fractions containing the matrix polymer that differ in composition.Type: ApplicationFiled: March 25, 2003Publication date: August 28, 2003Inventors: Gerardus J.M. De Koning, Erik R Peerlkamp
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Publication number: 20030134943Abstract: The invention concerns a method for preparing a masterbatch based on a polymer and mineral particles, in particular precipitate silica particles, by mixing a polymer dissolved in an organic solvent and mineral particles, in particular precipitate silica particles, suspended in an organic solvent. The invention also concerns masterbatch obtainable by said method.Type: ApplicationFiled: July 19, 2002Publication date: July 17, 2003Inventors: Dominique Labarre, Helene Lanniois-Drean, Patrick De Lanty, Martial Deruelle
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Publication number: 20030111770Abstract: A method for forming a vulcanizable composition of matter, the method comprising providing a polymer cement or latex comprising at least one rubber, adding at least one processing aid to the cement or latex to form a modified rubber cement or latex, isolating the rubber and at least one processing aid to form a premix, and mixing the premix with carbon black.Type: ApplicationFiled: December 13, 2001Publication date: June 19, 2003Applicant: Bridgestone Corp.Inventors: Georg G. A. Bohm, Anthony J. Ramic, James D. Ulmer, William L. Hergenrother, Christine M. Rademacher, David F. Lawson, Sunil B. Sarkar
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Patent number: 6555600Abstract: Corrosion inhibiting thermoplastic alloys and methods of preparing same for use in fabricating molded articles with long-term corrosion protection. Masterbatches of nylon, polycarbonate, and polyethylene terephthalate high temperature engineering plastic resins together with selected corrosion inhibitor formulations are extruded for use in injection molding operations Molded articles are prepared from the high temperature engineering plastic resins and a solid phase corrosion inhibitor blended in situ, and wherein the resin consists essentially of nylon, polycarbonates, and polyethylene terephthalate, and wherein the corrosion inhibitor contains a blend of corrosion inhibitors such as cyclohexylammonium benzoate, sodium nitrite, benzotriazole, and sodium sebacate.Type: GrantFiled: February 5, 2001Date of Patent: April 29, 2003Assignee: Cortec CorporationInventors: Alex Sobkin, Boris A. Miksic, Michael Hobday
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Patent number: 6548574Abstract: An untreated filler and a high viscosity silicone polymer premix is charged into a compounding apparatus. Treating agent and additional silicone polymer are added to the premix and the premix, treating agent and additional silicone polymer are compounded to produce a heat vulcanizable filled silicone composition.Type: GrantFiled: December 21, 1999Date of Patent: April 15, 2003Assignee: General Electric CompanyInventors: Devesh Mathur, Alan L. Tate
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Patent number: 6548570Abstract: A radiation shielding material is manufactured from an elastomer that is blended with a radiation-absorbing filler material. The filler material comprises a powder of a metal with a high atomic member, or compounds thereof. The filler material is represented by more than 80 percent weight and has a grain size distribution in the range of 20 &mgr;m to 120 &mgr;m. The filler material is mixed with a loading material in powdered form. That mixture is kneaded with the elastomer within a mixer while the temperature is maintained below 180° C. The kneaded mixture is cooled and then cut into strips. The strips are passed through a strainer having a mesh width of between 5 &mgr;m and 1000 &mgr;m. The strained strips are then formed into a foil.Type: GrantFiled: November 16, 2000Date of Patent: April 15, 2003Assignee: Arntz Beteiligungs GmbH & Co. KGInventor: Wolfgang Lange
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Patent number: 6548559Abstract: A new composition is formed by combining a reduced waste rubber, a heavy paraffin and a reduced waste thermoplastic, and then further reducing the resulting material while holding it at an elevated temperature. In preferred embodiments the rubber and thermoplastic are pre-processed by reduction to mesh sizes of about 0.25 inch and 0.5 inch respectively, and the paraffin is pre-processed by being fluidizing to have a viscosity of at most about 1.0 Centipoise. It is also contemplated that the rubber and paraffin can be advantageously combined with each other prior to inclusion of the thermoplastic, with the paraffin/rubber combination being heated to a temperature of about 220° F. to about 250° F. for about 3 minutes. It is still further contemplated that the combination of rubber, paraffin and thermoplastic can be heated to between about 360° F. and about 500° F.Type: GrantFiled: March 3, 1997Date of Patent: April 15, 2003Inventor: Robert Fish
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Patent number: 6531530Abstract: The present invention provides a flame retardant resin composition having excellent impact resistance, heat resistance, dimensional stability, and flame retardance. That is, it provides a flame retardant resin composition made up of: 100 parts by weight of a thermoplastic resin (A) containing: 80 to 10% by weight of (A-1) at least one of an aromatic polyester resin and a polyamide resin, 17 to 85% by weight of at least one of a rubber-containing copolymer of a vinyl cyanide and an aromatic vinyl (A-2) and a copolymer of a vinyl cyanide and an aromatic vinyl (A-3) and 3 to 40% by weight of (A-4) at least one of a polyphenylene ether resin and a polyphenylene sulfide resin, 1 to 60 parts by weight of a non-halogen, organic or inorganic flame retardant (B) and 100 parts by weight or less of a filler (C).Type: GrantFiled: December 21, 2000Date of Patent: March 11, 2003Assignee: Daicel Chemical Industries, Ltd.Inventor: Takayuki Asano
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Publication number: 20030040556Abstract: Provided are a color pigment master batch having a high recycling property and a process for producing a blow-molded article having a grain-tone appearance using this color pigment master batch.Type: ApplicationFiled: March 28, 2002Publication date: February 27, 2003Inventors: Masami Takimoto, Toshihisa Miyaoka, Takeshi Watanabe
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Patent number: 6521351Abstract: The present invention relates to an opaque, white UV-resistant low-flammability film with a thickness of from 10 to 500 &mgr;m whose principal constituent is a crystallizable thermoplastic. It also comprises at least barium sulfate, at least one UV stabilizer and at least one optical brightener. The barium sulfate and/or the optical brightener and/or the UV stabilizer here is either incorporated directly into the thermoplastic when the polymer is prepared or fed as a masterbatch during film production.Type: GrantFiled: February 8, 2001Date of Patent: February 18, 2003Assignee: Mitsubishi Polyester Film GmbHInventors: Ursula Murschall, Guenther Crass, Klaus Oberlaender, Ulrich Kern
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Patent number: 6518340Abstract: 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: GrantFiled: August 7, 2001Date of Patent: February 11, 2003Assignee: General Electric CompanyInventors: James Ross Fishburn, Erwin Marie Alfred Gijzen, Johannes Martinus Dina Goossens, Walter van der Heijden, Henricus Hubertus Maria van Hout, Hendrik Verhoogt
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Patent number: 6515044Abstract: The present invention relates to a process for the preparation of high-viscosity polyesters with a reduced content of acid end groups, wherein a masterbatch of low-viscosity polyesters and oxazolines is prepared, this is then mixed with a higher-viscosity polyester and this mixture (dry blend) is further processed.Type: GrantFiled: April 9, 2001Date of Patent: February 4, 2003Assignee: Bayer AktiengesellschaftInventors: Karsten-Josef Idel, Hans-Jürgen Dietrich, Matthias Müller
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Patent number: 6514302Abstract: Granular molding materials for fabricating abrasive articles, such as, for example, grinding wheels, are produced by mixing heated abrasive grains with a resin blend including two phenol-novolac resins. Preferably, the resin blend is added to the abrasive grains in the mixer apparatus of the invention, which can be a bowl type mixer. The mixer can be preheated by directing a heated gas, such as air, across the mixer. The granular molding material can also include a curing agent, fillers and other materials generally employed in fabricating abrasive articles.Type: GrantFiled: May 15, 2001Date of Patent: February 4, 2003Assignee: Saint-Gobain Abrasives, Inc.Inventors: Michael J. Lemberger, John P. McNamara, Raymond J. Pellerin, Robert L. Holden, René Goutte
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Publication number: 20020193466Abstract: 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: ApplicationFiled: June 13, 2001Publication date: December 19, 2002Inventors: Evert Kramer, Friedrich Domke
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Patent number: 6486244Abstract: The invention relates to a process for the manufacture of a thermoplastic composition comprising a polyphenylene ether resin and a styrenic resin wherein the processes comprises a concentrate of polyphenylene ether resin with an organic phosphate compound. The concentrate allows for ease of handling of polyphenylene ether resin without the risk of dust ignition while obtaining substantially the same physical properties as obtained with polyphenylene ether resin powder. The invention also relates to articles formed out of the compositions made by the process of the invention.Type: GrantFiled: January 18, 2001Date of Patent: November 26, 2002Assignee: General Electric CompanyInventors: Adeyinka Adedeji, Robert Hossan, William E. Pecak, Sai-Pei Ting
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Patent number: 6476110Abstract: Rubber compositions filled with an unusually high content of solid magnetizable particles such as iron oxide or strontium ferrite but having great resistance to crack initiation and crack growth. This allows generation of strongly magnetized areas in rubber articles built with a rubber composition according this invention. This gives—also in those applications where a large distance between a row of magnetized areas and a sensor is necessary due to deformation—well-reproducible and well-recognizable signals despite existence of disturbing magnetic fields. The magnetizable particles are bonded to a rubber matrix by a bonding agent, namely an organo-functional silane.Type: GrantFiled: February 18, 2000Date of Patent: November 5, 2002Assignee: Continental AGInventors: Frank Paul Papp, Duane Marle Oxley, James Michael Giustino
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Publication number: 20020156171Abstract: 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: ApplicationFiled: February 7, 2002Publication date: October 24, 2002Inventors: Marta Drewniak, Xia Zhao, Satchit Srinivasan
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Patent number: 6465546Abstract: The present invention disclosures 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: GrantFiled: October 16, 2000Date of Patent: October 15, 2002Assignee: Callaway Golf CompanyInventors: Daniel B. Jackson, Amado M. Garcia
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Patent number: 6462105Abstract: An aliphatic polyester composition for a masterbatch which is improved in dispersibility of a filler, anti-blocking property, transparency, molding stability and slipperiness and which is suited for production of an aliphatic polyester film, and a method for producing an aliphatic polyester film using said composition. An aliphatic polyester composition for a masterbatch comprising 100 parts by weight of an aliphatic polyester and 0.1 to 40 parts by weight of an anti-blocking agent and a method for producing an aliphatic polyester film using said composition are provided.Type: GrantFiled: February 6, 2001Date of Patent: October 8, 2002Assignee: Mitsui Chemicals, Inc.Inventors: Takayuki Kuroki, Shuhei Ikado
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Patent number: 6448310Abstract: A method of making a dry, solid, powdered flame retardant composition is disclosed. Polyvinyl chloride is mixed with about 20 to about 150 phr of a liquid flame retardant having the general formula at a temperature of about 50 to about 100° C., where R1 and R2 are independently selected from aliphatic from C2 to C20. Also disclosed are a dry, solid, powdered flame retardant composition made by this method, a method of making a flame retardant polymer by compounding that dry, solid, powdered flame retardant composition with a polymer, and a flame retardant polymer made by that method.Type: GrantFiled: January 16, 2001Date of Patent: September 10, 2002Assignee: Laurel Industries, Inc.Inventor: Ronald L. Markezich
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Patent number: 6448308Abstract: To provide a resin composition as a non-halogenated flame retardant resin composition, having a high degree of flame retardant property, equipped with good electric characteristics by suppressing the generation of phosphoric acid, and improved in working environment and safety by using a flame retardant resin composition comprising (A) a thermoplastic aromatic polyester of 100 parts weight, (B) a coated red phosphorus powder consisting of an essentially spherical red phosphorus having a cured resin coating, directly obtained from a conversion treatment method of yellow phosphorus, not requiring a pulverization and without having crushed surfaces of 1 to 15 parts weight and (C) an aromatic polycarbonate of 5 to 150 parts weight.Type: GrantFiled: October 22, 1999Date of Patent: September 10, 2002Assignee: Teijin LimitedInventors: Mioko Suzuki, Katsuhiko Hironaka, Jun Haruhara
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Patent number: 6440535Abstract: A recording sheet is disclosed comprising a substrate, having on at least one side thereon, an ink absorbent layer, said ink absorbent layer comprising alumina sol, at least one gelling agent, at least one cyclodextrin compound, and optionally, at least one binder. The ink absorbent layer may further comprise at least one viscosity, modifying compound and at least one gloss enhancing compound. The recording sheet of the present invention provides enhanced lightfastness properties.Type: GrantFiled: February 23, 1998Date of Patent: August 27, 2002Assignee: Hewlett-Packard CompanyInventors: Kai-Kong Iu, Gary W. Byers
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Publication number: 20020115749Abstract: A method of making polymeric particulates wherein polymeric scrap material, virgin polymeric material and mixtures thereof are supplied to intermeshing extruder screws which are rotated to transport the polymeric material along their length and subject the polymeric material to solid state shear pulverization and in-situ polymer compatibilization, if two or more incompatible polymers are present. Uniform pulverized particulates are produced without addition of a compatibilizing agent. The pulverized particulates are directly melt processable (as powder feedstock) and surprisingly yield a substantially homogeneous light color product.Type: ApplicationFiled: October 11, 2001Publication date: August 22, 2002Inventor: Klementina Khait
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Publication number: 20020111413Abstract: A process is provided for making a carbon-filled rubber having a uniform dispersion of nanometric-sized carbon black particles. Fluffy carbon black is received as a slurry in water and added to latex rubber before or during coagulation in an emulsion styrene butadiene rubber plant, or fluffy carbon black is similarly incorporated in rubber using a different type of rubber-manufacturing process. A uniform dispersion of smaller-than-usual carbon black particles in rubber is formed, which provides a black masterbatch rubber with superior mechanical and rheological properties. Ash and grit is removed from the fluffy carbon black slurry, which further improves the properties of the carbon-filled rubber by reducing defects in the rubber caused by the ash or grit.Type: ApplicationFiled: December 5, 2001Publication date: August 15, 2002Applicant: CID Centro de Investigacion y Desarrollo Tecnologico, S.A. de C.V.Inventors: Francisco Lopez-Serrano Ramos, Luis Enrique Mille Loera, Angel Garcia Garza