Utilizing Plural Discrete Mixing Operations In Specifically Described Distinct Noninterconnected Zones Patents (Class 523/353)
  • Patent number: 8802752
    Abstract: A process for the production of a particle composition containing, at least one resin and at least one pigment is described, said process comprising the following steps: •extrusion of a mixture containing said at least one resin and said at least one pigment without induced heating; •subsequent extrusion, with induced heating, of the mixture obtained from the preceding extrusion; •granulation of the mixture thus obtained. With the abovementioned process it is possible to obtain a composition having granules with an average diameter less than 2 microns and a greater homogeneity than the known processes.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: August 12, 2014
    Assignee: PPG Industries Ohio, Inc
    Inventor: Giovanni Broggi
  • Patent number: 8680178
    Abstract: The in-line repair operations in the automotive industry require high-temperature masking tapes which satisfy a particular profile of requirements. Hence such masking tapes must be temperature-stable and must have a high crosslinking potential. Masking tapes employed are tapes coated with thermally crosslinking natural rubber (NR) adhesives which have a crosslinker resin/phenolic resin component.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: March 25, 2014
    Assignee: Tesa SE
    Inventors: Andreas Meier, Matthias Seibert, Sabine Thormeier, Karsten Seitz
  • Patent number: 7939584
    Abstract: Drag reduction of hydrocarbon fluids flowing through pipelines of various lengths is improved by polyolefin drag reducer dispersions or dispersions using bi- or multi-modal particle size distributions. Drag reducers having larger particle sizes dissolve more slowly than drag reducers having smaller particle sizes. By using at least bi-modal particle size distributions drag reduction can be distributed more uniformly over the length of the pipeline where smaller sized particles dissolve sooner or earlier in the pipeline and larger sized particles dissolve later or further along the pipeline.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: May 10, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Jeffery R. Harris, Lu Chien Chou, George G. Ramsay, John F. Motier, Nagesh S. Kommareddi, Thomas Mathew
  • Patent number: 7932321
    Abstract: The present invention discloses a fabrication method of a basic polymer electrolyte film of blended polyvinyl alcohol and quaternary amine, wherein hydrophilic polyvinyl alcohol and quaternary amine are separately dissolved in a polar organic solvent, and then, the solutions are blended to obtain a glutinous polymeric solution; the glutinous polymeric solution is baked to form a film, and then, the film is soaked in an alkali hydroxide solution to obtain a basic electrolyte-containing solid-state polymer electrolyte film. The basic polymer electrolyte film of the present invention has the characteristics of superior chemical stability, high mechanical strength and high ionic conductivity. When the present invention applies to a zinc-air battery, the utilization rate of zinc is promoted. The basic polymer electrolyte film of the present invention can be widely used in various energy storage systems, such as alkaline battery systems, alkaline fuel cells and capacitors.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: April 26, 2011
    Assignee: Chang Gung University
    Inventors: Gwo-Mei Wu, Chun-Chen Yang, Sheng-Jen Lin, Chi-Neng Huang
  • Publication number: 20110054072
    Abstract: A white heat-curable silicone/epoxy hybrid resin composition is provided comprising (A) a heat-curable silicone resin, (B) a triazine derived epoxy resin composition, (C) a white pigment, (D) an inorganic filler, and (E) an antioxidant. Antioxidant (E) is a phosphite compound having formula: P(OR1)(OR2)2 wherein R1 and R2 are organic groups of at least 6 carbon atoms. Components (A) and (B) are present in a weight ratio of from 5:95 to 95:5. The composition effectively cures into a product maintaining heat resistance, light resistance and improved strength over a long term.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 3, 2011
    Inventors: Junichi SAWADA, Yusuke Taguchi
  • Publication number: 20100197829
    Abstract: The invention relates to processes for the production of microgel-containing rubber mixtures, to rubber mixtures obtainable by the processes, to processes for the production of vulcanizates, and also to vulcanizates after the vulcanization process, in particular in the form of tires, parts of tires, or industrial rubber items.
    Type: Application
    Filed: April 17, 2008
    Publication date: August 5, 2010
    Inventor: Werner Obrecht
  • Publication number: 20100120945
    Abstract: A method of producing a stable aqueous dispersion of a latex, solid particles and a dispersing agent, comprising contacting the latex with an anionic dispersing agent to form a modified latex, feeding the modified latex and the solid particles to a zone of high shear forces, and simultaneously subjecting essentially all of the modified latex and the solid particles fed to said zone to high shear forces to form a latex-particle slurry. By means of the invention, over 60 wt-% of the latex can be adsorbed on the solids. Latex immobilization increases the surface strength of final coating layer and allows for a decrease of latex consumption in paper and cardboard and paint applications.
    Type: Application
    Filed: April 4, 2008
    Publication date: May 13, 2010
    Applicant: SPECIALTY MINERALS (Michigan) INC.
    Inventors: Teppo Sahlberg, Olavi Imppola, Olli Suontausta
  • Patent number: 7537715
    Abstract: A polyamic ester (PAE) film, which shows an electro-optic (EO) and nonlinear optical (NLO) properties without a poling process, is prepared. The chromophore in the film seems to be slightly oriented normally to the film surface (transverse magnetic field (TM) direction even though the polymer solution is spin-coated. This is due to the nano-configuration structure of PAE controlled by introducing a designed chemical structure into the monomeric repeating unit of PAE. Manufacturing the relating devices can be simplified by using the self-poled polymer film as a polymer waveguide. Additionally, the EO property of the film is thermodynamically stable.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 26, 2009
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seung Koo Park, Jung Jin Ju, Suntak Park, Min-su Kim, Myung-Hyun Lee
  • Patent number: 7449516
    Abstract: Powder coating materials preparable by (1) mixing at least two liquid components comprising in each case at least one liquid starting product in a static mixer, to give a molecularly disperse and/or finely dispersed liquid mixture, (2) emulsifying the liquid mixture (1) in an aqueous medium in a dispersing unit, to give an aqueous emulsion of liquid particles, (3) cooling the emulsion (2) so that a suspension of dimensionally stable particles is formed, (4) isolating the dimensionally stable particles from the suspension (3) or alternatively (3) isolating the dimensionally stable particles directly from the emulsion (2); and also processes for preparing them and their use as coating materials, adhesives, and sealing compounds or to prepare such compositions.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: November 11, 2008
    Assignee: BASF Coatings AG
    Inventors: Robert Bayer, Werner-Alfons Jung, Michael Mauss, Hans-Joachim Weintz, Jan Berg, Reinhard Polke, Heiko Wolf, Michael Stang
  • Patent number: 7439284
    Abstract: A method of making a thermoplastic composition comprises melt mixing a concentrate comprising a first thermoplastic, a second thermoplastic and an additive with a component selected from the group consisting of a third thermoplastic, fire retardant additive, reinforcing agent, electrically conductive filler, non-electrically conductive filler and combinations of two or more of the foregoing.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: October 21, 2008
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Montgomery M. Alger, Robert Hossan, Torben P. Kempers, Geoffrey H. Riding, David J. Swanson, Michael L. Todt
  • Patent number: 7345110
    Abstract: A process for the continuous production of an aqueous polyurethane dispersion based on at least one aliphatic and/or aromatic polyisocyanate is described, which is characterised by the following steps: a) production of an aqueous pre-emulsion by mixing a polyurethane prepolymer containing hydrophilic and/or potentially hydrophilic groups with water in a mixing nozzle, wherein the polyurethane prepolymer is injected into the water; b) formation of an emulsion by homogenization of the pre-emulsion from step a) in a multi-step homogenizing nozzle. Paint films containing the aqueous polyurethane dispersion produced by the process can be used to coat substrates.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: March 18, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Rolf Gertzmann, Bernd Klinksiek, Lars Obendorf, Christoph Irle
  • 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: 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: 20040116571
    Abstract: A heat transfer material includes thermoplastic elastomer such as styrenic block copolymer, oil and fillers, and has a composite heat transfer coefficient greater than 0.8 watts/m-K. The material is easily conformable to irregularly shaped surfaces and has low thermal impedance values less than 0.1K-in2/W at 0.5 MPa mounting pressure. The material has a good dry-out performance of less than 0.15% at 70° C., 240 hours, which are better than the existing thermal conductive grease. More particularly, the material has excellent re-usability.
    Type: Application
    Filed: December 12, 2002
    Publication date: June 17, 2004
    Inventors: Yung-Ming Su, Chin-Huei Yen
  • 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: 6734231
    Abstract: The present invention relates to easily distributable pigment compositions consisting essentially of pigment and urea-aldehyde resin, wherein the weight ratio of pigment to urea-aldehyde resin is generally in the range of 40:60 to 90:10, a process for their production and their use in pigmenting high molecular weight organic materials. Due to the excellent dispersibility of the pigment compositions of this invention, uniform distribution of pigment particles throughout the entire application media and, therefore, excellent color consistency is readily achieved. Products, for example solvent paints, spread coatings and powder coatings, comprising the stir-in pigment compositions show high color strength, high gloss and low haze as well as very good light fastness and weathering fastness.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: May 11, 2004
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Gerardus Lambertus Creusen, Leonardus Johannes Hubertus Erkens, Robertus Josef Mathijs Hermans, Nico Adelin Valentin Roox
  • Patent number: 6590040
    Abstract: A process for producing a superabsorbent polymer is described. The process that entails a continuous hydrolysis of an aqueous emulsion of crosslinked or uncrosslinked polyacrylonitrile in the form of fine particles is carried out in a cascade of stirred tanks. The reaction with alkali-hydroxide solution an aqueous-alcoholic medium at 60 to 100° C. yields polymers that are suitable for the preparation of hygiene products, water-storing materials in agriculture, and sheathing of electrical cables.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: July 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Günter Sackmann, Rolf-Volker Meyer, Sergei Schapowalow, Telman Bayburdov, Jgor Nakonetschny
  • Publication number: 20010031801
    Abstract: Apparatus and method for preparing microparticles. An emulsion is formed by combining two phases in a static mixing assembly. The static mixing assembly preferably includes a preblending static mixer and a manifold. The emulsion flows out of the static mixing assembly into a quench liquid whereby droplets of the emulsion form microparticles. The residence time of the emulsion in the static mixing assembly is controlled to obtain a predetermined particle size distribution of the resulting microparticles.
    Type: Application
    Filed: April 10, 2001
    Publication date: October 18, 2001
    Inventors: Shawn L. Lyons, Steven G. Wright
  • Patent number: 6001917
    Abstract: In a first step, basic components including (A) 100 parts by weight of an organopolysiloxane gum, (B) 5-100 parts by weight of a reinforcing silica filler, and (C) 0.1-30 parts by weight of a processing aid are fed batchwise to a closed mixer for mixing them at a temperature of room temperature to 150.degree. C. In a second step, the mixture is fed into a kneader/mixer for heat treating at a temperature of 150-250.degree. C. The first step achieves quick dispersion and cooperates with the second step to form a heat-curable silicone rubber compound in an efficient manner.
    Type: Grant
    Filed: June 27, 1998
    Date of Patent: December 14, 1999
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masaharu Takahashi, Yutaka Hagiwara, Minoru Igarashi, Keiji Shibata
  • Patent number: 5994492
    Abstract: A microgel is produced by a two-stage process wherein the monomers are first polymerized in the absence of solvent for a controlled period, and in a second stage solvent is added and polymerization is completed. The polymer is preferably a polyurethane formed from a polyalkylene glycol, a triol and a diisocyanate. The molecular weight is typically 100,000 to 200,000. The microgels form granules which may be compressed into solid form. Such solid forms containing an active agent, such as a protein, are useful as sustained delivery devices.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: November 30, 1999
    Assignee: University of Strathclyde
    Inventors: Neil Bonnette Graham, Jianwen Mao
  • Patent number: 5891936
    Abstract: A process of making a polyhydroxyalkanoate PHA latex comprises making a liquid-form solution of such PHA in a water soluble liquid and contacting that solution with water under shear. Suitably the solution is prepared at a temperature between the boiling point of water and 10.degree. C. below the melting point of the PHA as measured by DSC for example by melt separating PHA from a microbiological suspension thereof, dissolving it in the water soluble liquid, and then contacting the solution at over 100.degree. C. with water at 50.degree.-95.degree. C. The water-soluble liquid may be for example 1,2-propandiol or a liquid more volatile than water such as ethanol, propanol or tertiary butanol. A surfactant may be present or added after contacting, for example one providing steric stabilisation such as an acrylic graft copolymer emulsifier.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: April 6, 1999
    Assignee: Monsanto Company
    Inventors: John MacDonald Liddell, Neil George, Peter Deryck Turner
  • Patent number: 5847052
    Abstract: A process for producing a thermoplastic elastomer composition which comprises dynamically cross-linking an olefine copolymer rubber and an olefine plastic using a twin-screw extruder, said process being characterized in that said twin-screw extruder comprises one or more kneading zones within a dynamically cross-linking area and the first kneading zone among said zones comprises a screw with forward kneading disks having a minimum thickness (T.sub.min) of less than 13 mm per disk. Said method enables production of a thermoplastic elastomer composition of good quality regardless of the scale of production.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: December 8, 1998
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Tatsuo Hamanaka, Yuji Goto, Noboru Komine, Norimasa Oda, Masamichi Ishibashi
  • Patent number: 5633296
    Abstract: The method for manufacturing rubber mixtures includes the steps of plasticizing batchwise rubber in a first inner kneader to produce a batch of plasticized rubber and transporting the batch of plasticized rubber, while still hot, into a second inner kneader. In the second kneader nonreactive additives are mixed into the batch of plasticized rubber.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: May 27, 1997
    Assignees: Julius Peter, Continental Aktiengesellschaft
    Inventor: Julius Peter
  • Patent number: 5530039
    Abstract: Process for manufacturing stopping compounds, in particular such as can be used for motor vehicle repair lacquering, in which in a first stage at least 90 wt.-% of the solvents required and 80 to 100 wt.-% of the binding agents required are dispersed together with such a proportion of the pigments and/or extenders as is required in order to ensure that the mixture can be dispersed in a high-speed agitator mill, as well as optionally together with the required additives in a high-speed agitator mill, in particular a bead mill or sand mill, whereupon the dispersed material produced is, in a second stage, mixed with the remaining amounts of pigment and/or extender as well as optionally the remaining amounts of binding agent and solvent and dispersed in a dissolver to the required fineness.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: June 25, 1996
    Assignee: Herberts GmbH
    Inventor: Otfried Nawotka
  • Patent number: 5407985
    Abstract: Stable aqueous microdispersions of finely divided polyamide resin particles and methods for the manufacture thereof are provided. The properties of these microdispersions are achieved by the addition thereto of an effective amount of a co-surfactant such as a lower alkyl alcohol. The provided microdispersions can be drawn into films which will form clear, continuous films at ambient or near-ambient temperatures regardless of the softening point of the polyamide resin. Dispersions according to this invention find use in hot melt adhesives, coatings, inks, and the like.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: April 18, 1995
    Assignee: Union Camp Corporation
    Inventor: George A. Smith
  • Patent number: 5369149
    Abstract: A method for preparing thermo-crosslinkable and/or thermoplastic elastomer blends by mixing the elastomer with plasticizer oil and other additives, said method comprising the steps of:(a) continuously premixing the crushed elastomer in an annular zone mixer with at least part of said plasticizer oil, and optionally with at least part of said other additives, to form a preblend in which said elastomer is decomposed and said additives are embedded in the polymer matrix;and thereafter(b) completing the mixing of said premix, and optionally of the remainder of said additives, in a mixing unit working batchwise or continuously.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: November 29, 1994
    Assignee: Gezolan AG
    Inventor: Jacques Unger
  • Patent number: 5250586
    Abstract: A composition including an oil and particles of a solid, water soluble flocculant polymer substantially immiscible with the oil provides ready dispersibility of the polymer in aqueous fluids. Desirably, the composition is substantially free of surfactants, the polymer particles have a mean particle size less than about 100 microns and preferably less than about 20 microns and the polymer particles are substantially dry.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: October 5, 1993
    Inventor: Clyde S. Scanley
  • Patent number: 5171768
    Abstract: The present invention relates to a free radical emulsion polymerization process. The latex is prepared by polymerizing (a) at least one conjugated diene, (b) at least one non-carboxylic vinyl aromatic or aliphatic comonomer selected from the group consisting of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toleuene, acrylonitrile, methacrylonitrile, vinylidene chloride, ethyl acrylate, butyl acrylate, vinyl pyridine, methylmethacrylate, hexylacrylate, 2-ethyl hexyl acrylate or mixtures thereof, and (c) at least one ethylenically unsaturated carboxylic acid monomer selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, 3-carboxyethylacrylate, itaconic acid or mixtures thereof.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: December 15, 1992
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Susan M. Prentice, Ramesh N. Gujarathi, Sun-Lin Chen
  • Patent number: 5110846
    Abstract: The method consists of the separate simultaneous extrusion, by means of two or more contiguous extruders or one extruder with two or more separate homogenization chambers, of two or more paints in powder form and the union of the extrusions in the molten state or still hot and then subsequent cooling as a single extrusion.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: May 5, 1992
    Assignee: Hoechst Sara S.p.A.
    Inventors: Silvestro Farronato, Sergio Gazzea
  • Patent number: 5095058
    Abstract: Aqueous dispersions of polyamide resins having improved stability with respect to gelation and phase separation are provided, along with preparative methods therefor. The improved stability of the provided aqueous dispersions is achieved by the addition to such dispersion of a chemical moiety, such as a water soluble, amphoteric amino acid, anionic and cationic salts of amino acid, or mixtures thereof, in aqueous solutions. In a preferred embodiment, a dispersion-stabilizing amount of glycine is added with the inversion water used to invert an emulsion of water in polyamide resin. The resulting emulsion of resin in water is then cooled below the resin's melting point, causing the emulsified droplets of the polyamide resin to solidify as finely divided particles which are dispersed uniformly through the aqueous phase. The stable, aqueous dispersions of this invention are useful in coatings, inks, and as coatings for hot melt adhesive applications.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: March 10, 1992
    Assignee: Union Camp Corporation
    Inventors: George A. Smith, Scott R. Hagedorn
  • Patent number: 4692479
    Abstract: An adhesive paste composition containing in admixture a resin component, a hardener component, a hydrophobic filler component and a curing agent. The resin component includes a polyol having at least two hydroxyl groups and the hardener component includes a liquid polyisocyanate containing at least two isocyanate groups. The admixture may be made by mixing together a premixed resin component containing a filler and a catalyst and a premixed hardener component containing a hydrophobic filler. The filler in the resin component, the hardener component, or both may be a thixotropic agent.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: September 8, 1987
    Assignee: Ashland Oil, Inc.
    Inventors: James T. Schneider, Albert L. Haugse
  • Patent number: 4647608
    Abstract: A method for the production of polyolefin resins containing both an organic amide and a zinc compound. One composition is prepared which contains the polyolefin and the amide, but which does not contain the zinc compound. Another composition is prepared which contains the polyolefin and the zinc compound, but which does not contain the amide. The two compositions are extruded separately, and the individual resins so obtained are blended to form the desired resin composition containing both the amide and the zinc compound, thereby preventing the zinc stearate from catalyzing the dehydration of the aliphatic amide to a nitrile.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: March 3, 1987
    Assignee: The Dow Chemical Company
    Inventor: John G. Green
  • Patent number: 4467060
    Abstract: A heterogeneous rubber composition having good air impermeability is made by mixing together separate fractions of rubbers and fillers.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: August 21, 1984
    Assignee: The B. F. Goodrich Company
    Inventor: Biing-Lin Lee
  • Patent number: 4360612
    Abstract: An improved process for preparing extruded films from film-forming polymeric compositions based on vinylidene chloride copolymers and containing one or more inorganic particulate additives and to the films so prepared. The improvement comprises first preparing a preblend of the inorganic particulate additives and an alkali metal salt of an alkylaryl sulfonic acid and, then making an admixture of the preblend and the vinylidene chloride copolymers. The admixture so prepared is then formed into an extruded film by conventional techniques.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: November 23, 1982
    Assignee: The Dow Chemical Company
    Inventors: Walter A. Trumbull, Angela J. Williams
  • Patent number: 4342670
    Abstract: A process for preparing a rubber composition for tire treads having resilience, wet skid resistance and wear resistance well balanced with each other, by mechanically mixing a specific amount in total of a halogenated butyl rubber, natural rubber or a polyisoprene rubber and a polybutadiene rubber with a specific amount of carbon black and with other additives in the first mixing step and then mechanically mixing the resulting mixture with the remainder of the rubber ingredients and carbon black in the second mixing step thereby to obtain the rubber composition.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: August 3, 1982
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Asahiro Ahagon, Makoto Misawa, Hiroshi Hirakawa
  • Patent number: 4321168
    Abstract: A process for preparing a tire tread rubber composition having improved rolling resistance and wet skid resistance comprising [I] 100 parts by weight of a rubber material composed of 25 to 75% by weight of substantially amorphous polybutadiene having a 1,2-bond unit content of 65 to 90 mole % and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 20 to 100 and 75 to 25% by weight of natural rubber and/or cis-1,4-polyisoprene, and [II] 40 to 70 parts by weight of carbon black, said process comprising (1) mechanically compounding 40 to 60 parts by weight of the rubber material [I] with 40 to 70 parts by weight of carbon black [II], and then (2) adding to the resulting mixture the rubber material [I] in an amount sufficient to adjust the amount of the carbon black [II] to 40 to 70 parts by weight per 100 parts by weight of the rubber material [I] and mechanically compounding them.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: March 23, 1982
    Assignees: Nippon Zeon Co., Ltd., The Yokohama Rubber Co., Ltd.
    Inventors: Akio Ueda, Shuichi Akita, Hiroshi Hirakawa, Asahiro Ahagon