Conjugated Diene Hydrocarbon Monomer Patents (Class 524/571)
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Patent number: 8288474Abstract: Alkoxy-modified silsesquioxane compounds are described. The alkoxy-modified silsesquioxane compounds contain an alkoxysilane group that participates in an alkoxysilane-silica reaction as a silica dispersing agent in rubber, with the release of zero to about 0.1% by weight of the rubber of volatile organic compounds (VOC), especially alcohol, during compounding and further processing. Further described are methods for making alkoxy-modified silsesquioxanes, methods for making vulcanizable rubber compounds containing alkoxy-modified silsesquioxanes, vulcanizable rubber compounds containing alkoxy-modified silsesquioxanes, and pneumatic tires comprising a component that contains alkoxy-modified silsesquioxanes.Type: GrantFiled: September 16, 2010Date of Patent: October 16, 2012Assignee: Bridgestone CorporationInventors: William L. Hergenrother, Chenchy Jeffrey Lin, Terrence E. Hogan, Ashley S. Hilton
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Patent number: 8283401Abstract: Provided by using a catalyst containing an yttrium compound is conjugated diene polymer with very low solution viscosity, improved workability, high degree of branching, and high content of cis-1,4 structures. Also provided is a rubber composition utilizing the polymer and allowing excellent dispersion of reinforcing agent. According to a method of manufacturing a conjugated diene polymer characterized by polymerizing a conjugated diene at 50 to 120° C. in the presence of a catalyst obtained from (A) an yttrium compound, (B) an ionic compound consisting of a non-coordinating anion and a cation, and (C) an organoaluminum compound, the conjugated diene polymer has the following characteristics that: (1) a ratio (Tcp/ML1+4) between a 5 wt % toluene solution viscosity (Tcp) measured at 25° C. and a Mooney viscosity (ML1+4) at 100° C. is 0.1 to 1.2; and (2) a content of cis-1,4 structures is 80% or higher, and a content of 1,2 structures is lower than 5%.Type: GrantFiled: December 4, 2009Date of Patent: October 9, 2012Assignee: UBE Industries, LtdInventors: Masato Murakami, Koji Shiba, Takeshi Shoda, Mitsuharu Anbe
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Patent number: 8278384Abstract: The invention relates to a polymer composition comprising a matrix polymer, silica particles dispersed therein, and a coupling agent and a screening agent for the silica particles, and is characterized in that the screening agent is an alkylamine compound. The polymer composition is particularly suitable for the manufacture of rubber tires with improved rolling resistance.Type: GrantFiled: November 23, 2007Date of Patent: October 2, 2012Assignee: Apollo Vredestein B.V.Inventors: Louis-Philippe Antoine Eugène Maria Reuvekamp, Gerard Nijman, Ewout Feenstra
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Publication number: 20120244340Abstract: A multi-layered membrane comprising a first layer that is substantially white in color; and a second layer including ground thermoset rubber.Type: ApplicationFiled: September 30, 2010Publication date: September 27, 2012Inventors: Lichih R. Peng, John Neill, Bruce F. Douglas, William B. Gorman
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Publication number: 20120241589Abstract: A plastic packaging component is provided that is formed of a resin containing an electromagnetic spectrally detectable additive mixed with the resin. The resin formed into a plastic packaging component of an aerosol package lid, an aerosol spray button, an aerosol spray tube, a trigger sprayer, an integrated lid-sprayer, a grease cartridge, a grease cap, plastic fiber toweling, a packaging strap, a pail lid, a jar cap, or a brush. A process for detecting a displaced packaging component in an organic production stream is provided that includes adding to a resin an electromagnetically detectable additive intermixed with the resin and forming the additive loaded resin into the plastic packaging component. The production stream is then scanned for the detectable signal of the additive. Upon detecting the additive, an alarm signal is provided that the production stream contains the displaced packaging component.Type: ApplicationFiled: February 14, 2012Publication date: September 27, 2012Inventors: Robert H. Martin, William A. Price, II, John Gregory Bruce, Darylnn Phillips Jordan, Craig Martin Stearns
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Patent number: 8273810Abstract: The invention disclosed herein relates to an improved process for making elastomeric polyisoprene articles. In particular, the process of the invention is a system which produces synthetic polyisoprene articles exhibiting tensile strength properties similar to that of solvent-based processes using natural rubber latex. The process comprises an accelerator composition at the pre-cure stage comprising a dithiocarbamate, a thiazole and a guanidine compound. In a preferred embodiment, the accelerator composition comprises zinc diethyldithiocarbamate (ZDEC), zinc 2-mercaptobenzothiazole (ZMBT) and diphenyl guanidine (DPG), in conjunction with a stabilizer, such as sodium caseinate. The invention also includes an elastomeric polyisoprene product made by the process, such as a surgeon's glove.Type: GrantFiled: September 22, 2010Date of Patent: September 25, 2012Assignee: Allegiance CorporationInventors: Shiping Wang, Yun-Siung Tony Yeh, Randell Wenig, Wong Weicheong
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Patent number: 8268449Abstract: New compositions for use as protective coatings and/or adhesives are provided. The compositions comprise a hydrocarbon resin (e.g., terpene rosin) and a rubber (e.g., EPDM) dispersed or dissolved in a solvent system. The solvent system is preferably a single-solvent system, and the compositions are preferably free of surfactants, dyes, and chromophores. The compositions can be cured or dried to form layers or films that are chemically and thermally resistant, but that can be readily dissolved and removed at the appropriate stage in the fabrication process.Type: GrantFiled: February 6, 2006Date of Patent: September 18, 2012Assignee: Brewer Science Inc.Inventors: John C. Moore, Michelle R. Fowler
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Publication number: 20120232216Abstract: Using a target loading value and target intrinsic properties desired for a rubber formulation, two or more fillers are combined to create a blend having the desired intrinsic properties—i. e. a blend can be created emulating the desired intrinsic properties of a single filler system. In another exemplary aspect, knowing the individual loadings of fillers along with the target values desired for the loading of the blend and its intrinsic properties, individual intrinsic properties for at least one unknown filler that will be used to create the blend can be calculated. The unknown filler can then be identified by comparing the calculated intrinsic properties with the intrinsic properties of known fillers. The method allows e.g.) a manufacturer to blend a variety of suitable fillers while maintaining a more limited inventory of fillers than would otherwise be required for multiple rubber formulations.Type: ApplicationFiled: December 3, 2009Publication date: September 13, 2012Inventor: Xiaofeng Shaw Yang
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Publication number: 20120225233Abstract: The use of a functionalized organosilicon compound as a coupling agent between an inorganic filler and an elastomer in an elastomer composition including an isoprene elastomer and a reinforcing inorganic filler is disclosed. The compound is selected among functionalized organosilicon compounds including at least one double bond C?C or C?N, and not including any C?C—C?O bonds or N?N bonds, and reacting with the isoprene units according to an electrocyclic reaction, in particular according to a standard cycloaddition reaction [2+1], [2+2], [3+2] or a Diels-Alder reaction [4+2] or an ene-synthesis reaction other than an ene-synthesis reaction between an isoprene unit and a C?C—C?O or N?N function. Also described, are elastomer composition(s) obtained and items manufactured using such compositions.Type: ApplicationFiled: June 2, 2010Publication date: September 6, 2012Applicant: RHODIA OPERATIONSInventors: Laurent Guy, Virginie Pevere, Thierry Vidal
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Publication number: 20120225984Abstract: This invention relates to novel sulfur-containing silane coupling agents, and organic polymers containing carbon-carbon double bonds. These novel silanes can be carried on organic and inorganic fillers. The invention also relates to articles of manufacture, particularly tires, made from the elastomer compositions described herein.Type: ApplicationFiled: April 27, 2012Publication date: September 6, 2012Applicant: Momentive Performance Materials Inc.Inventors: Richard W. CRUSE, W. Michael YORK, Eric R. POHL, Antonio CHAVES, Prashant JOSHI
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Patent number: 8258207Abstract: Blends of carbon black or other fillers is described. The blends of carbon black or other fillers are preferably pre-blended prior to introducing the blend into a product such as an elastomeric or polymeric product.Type: GrantFiled: April 28, 2011Date of Patent: September 4, 2012Assignee: Cabot CorporationInventor: Gregory T. Gaudet
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Patent number: 8236875Abstract: The invention relates to a rubber mixture, in particular for vehicle air-inflated tires, seat belts, belts and hoses. The rubber mixture is characterized by the following composition: at least one polar or non-polar rubber and at least one bright and/or dark filler and at least one softener, wherein the softener is free of polycyclic aromatics according to Directive 76/769/EEC, and wherein the carbon source for the softener comes from non-fossil sources, and other additives.Type: GrantFiled: January 13, 2011Date of Patent: August 7, 2012Assignee: Continental Reifen Deutschland GmbHInventors: Carla Recker, Thorsten Reese, Jens Schöning
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Patent number: 8236882Abstract: A rubber mixture which exhibits reliable processability contains (A) a rubber or mixture of rubbers, (B) a filler, (C) at least one organosilane, (D) a thiuram accelerator, and (E) a nitrogen-containing co-activator. A weight ratio of thiuram accelerator (D) to nitrogen-containing co-activator (E) is equal to or greater than 1.Type: GrantFiled: November 19, 2004Date of Patent: August 7, 2012Assignee: Evonik Degussa GmbHInventors: Oliver Klockmann, Andre Hasse, Hans-Detlef Lughinsland
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Patent number: 8232338Abstract: A rubber composition based on at least one diene elastomer, containing less than 2 phr of zinc, phr meaning parts per hundred parts of rubber (elastomer), and based on at least one reinforcing filler and one sulphur-based crosslinking system, comprising a zinc carboxylate of formula: (RCOO)2Zn, in which R represents a hydrocarbon group chosen from cyclic or non-cyclic, linear or branched alkyl groups having 1 to 16 carbon atoms, aryl groups, aralkyl groups or alkaryl groups having 1 to 16 carbon atoms. Also disclosed is a process for preparing such a rubber composition which is suitable for manufacturing tires or semi-finished products made of rubber intended for these tires.Type: GrantFiled: December 21, 2007Date of Patent: July 31, 2012Assignee: Michelin Recherche et Technique S.A.Inventors: José Carlos Araujo Da Silva, Anne Veyland
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Patent number: 8227538Abstract: A rubber mixture with improved abrasion with improved abrasion performance, in particular for pneumatic tires, has the following composition: from 30 to 100 phr of at least one diene rubber; from 0.1 to 10 phr of at least one vulcanization accelerator selected from the group consisting of: thiazole accelerators, mercapto accelerators, sulfenamide accelerators, guanidine accelerators, thiuram accelerators, dithiocarbamate accelerators, amine accelerators, thioureas, and/or other accelerators; and a vulcanization system of sulfur comprising elemental sulfur, sulfur donor and silane between 0.25 and 0.08 moles per 100 parts by weight of the rubber elastometer, whereby the free sulfur contributes in the range of 0 to 70%, the sulfur donor contributes in the range of 5 to 30%, and the silane contributes in the range of 20 to 95%.Type: GrantFiled: June 5, 2008Date of Patent: July 24, 2012Assignee: Continental AGInventors: William Michael York, Carla Recker, Katharina Herzog, Hajo Weinreich, Boris Mergell, Viktoriya Tkachenko, Norbert Mueller, Juergen Wagemann
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Patent number: 8217111Abstract: The invention is a method of producing an essentially electrically neutral polymer dispersion, comprising a polymerizing one or more monomers in the presence of a nonionic surfactant, wherein the polymerization preferably occurs in the absence of ionic surfactants. The invention also includes methods of producing positively or negatively charged polymer dispersions comprising producing the essentially nonionic polymer dispersion and further adding a cationically-charged or anionically-charged surfactant or electrolyte. The invention further includes dispersions produced by the methods of the invention and polymer films and powders produced from these dispersions.Type: GrantFiled: April 4, 2007Date of Patent: July 10, 2012Assignee: BASF SEInventors: Koichi Takamura, Armin Burghart
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Publication number: 20120165464Abstract: A method for preparing a functionalized polymer, the method comprising the step of reacting a reactive polymer with a functionalizing agent defined by formula I or formula II: or combinations thereof, where R1, R2, and R3 are each independently a divalent organic group, R4 and R5 are each independently a monovalent organic group, a is an integer from 0 to 1, x is an integer from 0 to 2, y is an integer from 1 to 3, x+y=3, and ? is a protected amino group.Type: ApplicationFiled: December 27, 2011Publication date: June 28, 2012Inventors: Terrence E. HOGAN, Xiao-Dong Pan, Kenji Nakatani, Ryota Tamate
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Publication number: 20120157616Abstract: Described are diol-derived organofunctional silanes in which the silanes contain cyclic and bridged alkoxy groups derived from hydrocarbon-based diols and methods for the preparation of the silanes. Also described are rubber compositions containing the diol-derived organofunctional silanes, methods for the preparation of the rubber compositions and articles of manufacture containing the rubber compositions, in particular, automotive tires and components thereof.Type: ApplicationFiled: February 28, 2012Publication date: June 21, 2012Applicant: Momentive Performance Materials Inc.Inventors: Antonio Chaves, Richard W. Cruse, Eric Raymond Pohl
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Publication number: 20120142851Abstract: A process for simply and inexpensively producing a conjugated diene polymer with a narrow molecular weight distribution and a high cis-bond content at a low cost is provided. The process comprises a polymerization step, wherein a conjugated diene polymer having a cis-1,4-bond content of 98.5 mass % or more and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography of 2.5 or less is obtained by carrying out a polymerization reaction in conjugated diene compounds using a catalyst composition containing a rare earth element-containing compound or a reaction product of the rare earth element-containing compound with a Lewis base, an aluminoxane and/or organoaluminum compound, and an iodine-containing compound.Type: ApplicationFiled: February 13, 2012Publication date: June 7, 2012Applicants: BRIDGESTONE CORPORATION, JSR CORPORATIONInventors: Takahiro NAKAMURA, Kouichirou Tani, Ryouji Tanaka, Takuo Sone, Toshihiro Tadaki, Junko Kurazumi, Koji Masaki, Yoichi Ozawa
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Patent number: 8193265Abstract: The rubber composition of the present invention is prepared by mixing 10 to 200 parts by mass of silica and 1 to 30 parts by mass of a silane compound having sulfur atom, which has a specific structure such that an organooxysilyl group is present at both ends of the molecule and sulfide or a polysulfide is present at the central portion of the molecule, with 100 parts by mass of a polymer. The rubber composition of the present invention has a small viscosity in the unvulcanized condition and provides excellent dispersion of silica. When this composition is used as a material for a tire tread, a tire exhibiting excellent abrasion resistance, a small rolling resistance and excellent braking property and steering stability on wet roads, can be obtained.Type: GrantFiled: June 9, 2003Date of Patent: June 5, 2012Assignee: Bridgestone CorporationInventors: Atsushi Nakayama, Daisuke Nohara
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Publication number: 20120136112Abstract: The present invention relates to a rubber granulate conversion process comprising steps consisting in: a) pyrolysing the rubber granulates at a temperature between 400 and 500° C. in the presence of water, to obtain a carbonized substance and a gaseous phase; and b) recovering the carbonized substance obtained during the previous step. The invention also relates to the products resulting from the conversion process and to the use of said products.Type: ApplicationFiled: June 1, 2010Publication date: May 31, 2012Applicant: ALFYMA INDUSTRIEInventors: Stanislaw Budzyn, Victor Iwanicki, Andrzej Sumara, Wieslaw Zmuda, Christian D'emal
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Patent number: 8182626Abstract: A tire composition with a Shore A hardness, according to DIN 53 505 and ASTM D2240, of not less than 40 and not greater than 95 and a glass-transition temperature Tg (E?max), according to DIN 53 513 with a specified temperature sweep of ?80° C. to +80° C. and a specified compression of 10+0.2% at 10 Hz, not less than ?80° C. and not greater than 0° C., with improved abrasion performance, in particular for pneumatic tires, has the following composition: at least one vulcanizable diene rubber selected from natural rubbers, synthetic polyisoprene rubbers, polyisobutylene rubbers, polybutadiene rubbers (BR), and random styrene-butadiene rubbers; from 35 to 300 phr of at least one active filler selected from carbon blacks, silicas, silicon based fillers, and metal oxides, of which at least 10 phr must be carbon blacks, silicas, or some combination thereof; from 0 to 250 phr of other or further additives; from 0.Type: GrantFiled: October 30, 2008Date of Patent: May 22, 2012Assignee: Continental AGInventors: Carla Recker, William Michael York, Thomas Kramer, Katharina Herzog, Boris Mergell, Richard W. Cruse
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Patent number: 8183327Abstract: The present invention provides: a rubber composition for a tire having favorable productivity, excellent heat aging resistance and abrasion resistance, and excellent fuel economy; and a pneumatic tire using the rubber composition. The rubber composition contains neither soluble sulfur nor insoluble sulfur, and contains diene rubber, 1-15 parts by mass of compound 1 represented by formula (1) and 0.1-5 parts by mass of compound 2 represented by formula (2), per 100 parts by mass of the diene rubber, and the amount ratio of compound 1 to compound 2 (compound 1/compound 2) is 1-8. wherein R1-R4 are the same or different, and represent C1-20 alkyl, C6-20 aryl, or C7-20 aralkyl, and n represents an integer of 1-12; wherein R5-R7 are the same or different, and represent C5-12 alkyl, x and y are the same or different, and represent an integer of 2-4, and m represents an integer of 0-10.Type: GrantFiled: September 23, 2010Date of Patent: May 22, 2012Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Kazuo Hochi
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Publication number: 20120123048Abstract: Moisture curable one-component organosilicon compositions exhibiting excellent resilience and adhesiveness contain an ?-alkoxysilyl-terminated base polymer, aminoalkylalkoxysilane adhesion promoter, and polyolefin bearing succinic anhydride groups.Type: ApplicationFiled: July 7, 2010Publication date: May 17, 2012Applicant: WACKER CHEMIE AGInventor: Wolfgang Ziche
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Patent number: 8178605Abstract: Tire tread comprising a rubber composition, the said composition comprising at least one diene elastomer, one reinforcing filler and one plasticizing system, characterized in that the said plasticizing system comprises, in combination: a plasticizing hydrocarbon resin, the glass transition temperature of which is greater than 0° C.; and a carboxylic acid diester corresponding to the formula (I): R—OOC—(CH2)n—COO—R ?in which n is included within a range from 1 to 15 and the R radicals, which are identical or different, represent a hydrocarbon radical. The invention also relates to the use of such a tread in the manufacture or the retreading of tires exhibiting a substantially improved compromise in properties with regard to the wear resistance and the wet grip.Type: GrantFiled: December 19, 2007Date of Patent: May 15, 2012Assignee: Michelin Recherche et Technique S.A.Inventors: Garance Lopitaux, Didier Vasseur
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Publication number: 20120116002Abstract: A sulfur-containing cycloaliphatic compound, useful as a crosslinker for filled sulfur-vulcanizable elastomer compositions, is represented by the general formula: G[-CaH2a—S[C(?O)]bR]n wherein G is selected from the group consisting of: saturated, monocyclic aliphatic group of valence n containing from 5 to 12 carbon atoms and optionally containing at least one halogen, and saturated monocyclic silicone [RSiO—]n[R2SiO—]p group of valence n; wherein each R independently is a hydrogen or monovalent hydrocarbon of up to 20 carbon atoms; each occurrence of subscripts a and b independently is an integer wherein a is 2 to 6 and b is 0 or 1; p is an integer of from 0 to 3; and, n is an integer of from 3 to 6, with the provisos that when b is 0, R is a hydrogen atom, and when G is a non-halogenated, saturated monocyclic aliphatic group of 6 carbon atoms, n cannot be 3.Type: ApplicationFiled: January 17, 2012Publication date: May 10, 2012Applicant: MOMENTIVE PERFORMANCE MATERICALS INC.Inventors: Richard W. Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
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Patent number: 8173737Abstract: Adhesive, comprising silanized, structurally modified, pyrogenically prepared silicas containing on their surface fixed vinyl groups or vinylsilyl groups, with hydrophobic groups, such as trimethylsilyl and/or dimethylsilyl and/or monomethylsilyl, additionally being fixed on the surface.Type: GrantFiled: May 6, 2008Date of Patent: May 8, 2012Assignee: Evonik Degussa GmbHInventors: Mario Scholz, Juergen Meyer, Juergen Heym, Pia Buckel
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Publication number: 20120108736Abstract: A vulcanizable composition of matter comprising a rubber component, a filler, a curative for the rubber, where the rubber component includes a multi-modal polymer including at least two distinct peak molecular weights within a range defined by a lower limit of 80 kg/mole and an upper limit of 500 kg/mole.Type: ApplicationFiled: December 28, 2009Publication date: May 3, 2012Applicant: Bridgestone CorporationInventors: Zhong-Ren Chen, Kevin McCauley, Mark Smale, Michael W. Hayes, Steven Luo
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Patent number: 8163838Abstract: A process of producing an artificial latex, comprising the steps: (a) cement formation, wherein a rubber is dissolved in a suitable hydrocarbon solvent; (b) emulsification of the cement formed in step (a), together with an aqueous soap solution, thus forming an oil-in-water emulsion; (c) hydrocarbon solvent removal, resulting in a latex of the rubber having particles of a median particle size in the range of from about 0.5 to 2.0 ?m, and optionally (d) latex concentration, forming an artificial latex with a higher solids content, characterized in that in step (b) a premix is formed first, which is subsequently homogenized into an oil-in-water emulsion, and wherein the premix is formed by mixing the cement with the aqueous soap solution at a volume ratio of 1:1.Type: GrantFiled: December 18, 2007Date of Patent: April 24, 2012Assignee: Kraton Polymers US LLCInventors: Adrie A. Van Der Huizen, Marc S. Sonderman, Arwin W. Van Der Waal, Wouter De Jong, Anton Nicolai
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Publication number: 20120090781Abstract: Co-agglomerated dispersions and methods for their preparation are described herein. The co-agglomerated dispersions are prepared by co-agglomerating an anionic polymer dispersion and inert particles. The polymers for use in the co-agglomerated dispersions are derived from one or more monomers including at least one conjugated diene monomer. The inert particles have a particle size of less than 2 ?m. Also described herein is an aqueous dispersion including co-agglomerated particles formed from at least one polymer and at least one inert material. Further described herein are foamed polymers, latex-based adhesives, waterproofing membranes, sound absorbing coatings, and methods for their preparation and use.Type: ApplicationFiled: July 1, 2010Publication date: April 19, 2012Applicant: BASF SEInventor: Koichi Takamura
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Patent number: 8158700Abstract: Provided is a composition comprising at least one polymer having a degree of unsaturation of no more than about 50 mol %; a filler selected from the group consisting of carbon black, silica, and mixtures thereof; and a polymeric additive comprising a functional end group reactive with said filler, wherein said polymeric additive has a degree of unsaturation of no more than about 50 mol % and a number average molecular weight between about 1,000 and about 25,000. The composition may optionally contain one or more polymers having a degree of unsaturation of more than 50 mol %. The composition may be particularly useful as a component for a tire.Type: GrantFiled: August 28, 2008Date of Patent: April 17, 2012Assignee: Bridgestone CorporationInventors: Zhong-Ren Chen, Zengquan Qin, Hiroshi Mouri, Yuan-Yong Yan, Mindaugas Rackaitis
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Patent number: 8158725Abstract: A method for preparing a functionalized polymer, the method comprising providing a reactive polymer, where the reactive polymer includes a carbon anion, an oxygen anion, a sulfur anion, or a nitrogen anion, reacting the reactive polymer with carbon disulfide to form a polymer including a dithio carboxyl group, and reacting the polymer including the dithio carboxyl group with a blocking agent.Type: GrantFiled: August 22, 2006Date of Patent: April 17, 2012Assignee: Bridgestone CorporationInventors: Terrence E. Hogan, William L. Hergenrother
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Patent number: 8153712Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.Type: GrantFiled: December 21, 2006Date of Patent: April 10, 2012Assignee: Zeon CorporationInventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
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Patent number: 8153723Abstract: A process for simply and inexpensively producing a conjugated diene polymer with a narrow molecular weight distribution and a high cis-bond content at a low cost is provided. The process comprises a polymerization step, wherein a conjugated diene polymer having a cis-1,4-bond content of 98.5 mass % or more and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography of 2.5 or less is obtained by carrying out a polymerization reaction in conjugated diene compounds using a catalyst composition containing a rare earth element-containing compound or a reaction product of the rare earth element-containing compound with a Lewis base, an aluminoxane and/or organoaluminum compound, and an iodine-containing compound.Type: GrantFiled: December 5, 2006Date of Patent: April 10, 2012Assignees: JSR Corporation, Bridgestone CorporationInventors: Takahiro Nakamura, Kouichirou Tani, Ryouji Tanaka, Takuo Sone, Toshihiro Tadaki, Junko Kurazumi, Koji Masaki, Yoichi Ozawa
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Publication number: 20120082791Abstract: Waterborne, polymer based coating compositions for interior and exterior use on elastomeric substrates (such as tires) with one or more polymer latex resins (having one or more carboxylic acid groups) in an amount sufficient to provide polymer solids in an amount of from 5 to 50% by weight of the coating; optionally one or more coalescing agents in an amount effective to coalesce and fuse polymer particles of the polymer latex resin into a relatively stretchable film when cured; one or more defoaming agents in an amount effective to enhance foam dissipation prior to film formation; one or more coupling agents having a first reactive group which is capable of bonding with the one or more carboxylic acid groups and a second reactive group which is capable of bonding with an elastomers substrate. Also, a method for applying such compositions to elastomeric substrates, such as tires.Type: ApplicationFiled: September 20, 2011Publication date: April 5, 2012Inventor: Robert Richard Liversage
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Publication number: 20120083571Abstract: A rubber composition, comprising a rubber component, and a carbon black, the carbon black satisfying the dibutyl phthalate (DBP) absorption number [unit: mL/100 g] of the carbon black is from 90 to 180, the difference of the BET specific surface area (BET5) [unit: m2/g] of the carbon black from the external specific surface area (STSA) [unit: m2/g] thereof satisfies the following: 5<(BET5)?(STSA)<12, the ratio between the Stokes diameter (Dst) of the carbon black and the Stokes diameter distribution (?D?50 (half band width)) thereof satisfies the following: 0.70<the ratio of (?D?50)/(Dst)<1.10, and the ratio between the BET specific surface area (BET5) [unit: m2/g] of the carbon black and the iodine adsorption number (IA) [unit: mg/g] thereof satisfies the following: 1.05<the ratio of (BET5)/(IA)<1.35.Type: ApplicationFiled: August 16, 2011Publication date: April 5, 2012Applicant: TOYO TIRE & RUBBER CO., LTD.Inventor: Shinya Hasegawa
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Patent number: 8143339Abstract: Nanocomposite compositions containing a graft polymer and a filler such as nano-sized silica having flame resistant properties are described.Type: GrantFiled: September 25, 2007Date of Patent: March 27, 2012Assignee: University of MassachusettsInventors: Steven B. Warner, Prabir K. Patra, Sandeep Razdan
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Patent number: 8143344Abstract: The present invention is further directed to a method of producing a particulate composite of silica and elastomer comprising the steps of dispersing a diene based elastomer in a hydrophobic liquid to form an elastomer dispersion; mixing the elastomer dispersion with an aqueous solution of an alkali metal silicate to form a mixture; adding a precipitating agent to the mixture to precipitate a porous silica onto the dispersed elastomer to form a particulate composite of silica and elastomer comprising a porous silica shell at least partially surrounding a core of diene based elastomer; and optionally adding a separating agent to remove the hydrophobic liquid from the particulate composite.Type: GrantFiled: December 3, 2009Date of Patent: March 27, 2012Assignee: The Goodyear Tire & Rubber CompanyInventors: Georges Koster, Wolfgang Lauer
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Publication number: 20120071603Abstract: An alkali metal-reacted aromatic compound which has three or more carbon atoms which are directly bonded to alkali metal atoms and aromatic rings in one molecule is used as a polymerization initiator to polymerize a monomer mixture which is contains at least one conjugated diene compound to thereby produce a radial conjugated diene polymer. Further, active ends of the polymer having active ends which is obtained by this method is made to react with a modifier which can react with the active ends to thereby produce an end-modified radial conjugated diene polymer. According to the present invention, it is possible to provide a method of production of the radial conjugated diene polymer which gives a high degree of freedom of polymer design and easy control of the polymer structure.Type: ApplicationFiled: May 11, 2010Publication date: March 22, 2012Inventors: Shigetaka Hayano, Takeshi Sugimura, Yasuhisa Tsukahara
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Patent number: 8138260Abstract: By a rubber composition for a side wall, including a rubber component containing a natural rubber component consisting of a natural rubber and a modified natural rubber, 20 to 60 parts by mass of silica, and 0.5 to 15 parts by mass of at least any one of a terpene-based resin and a rosin-based resin based on 100 parts by mass of the rubber component, and a pneumatic tire provided with a side wall rubber using the same, a rubber composition for a side wall in which both of maintenance of properties desired in a rubber composition for a side wall such as durability and improvement in processibility can be realized while a use amount of a raw material derived from a petroleum source is reduced, and a pneumatic tire in which running safety is improved by providing with a side wall rubber using the same, are provided.Type: GrantFiled: March 14, 2008Date of Patent: March 20, 2012Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Issei Nakakita
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Publication number: 20120053264Abstract: Provided are a process for efficiently producing a rubber wet master batch in which a dispersibility of carbon black in the rubber is improved, in which a reinforcing property and an abrasion resistance of the rubber can be enhanced by using carbon black having a high surface activity, in which a yield of the carbon black in the wet master batch obtained is not reduced and in which a handling property of the carbon black is good as compared with master batches prepared by using a granulated and dried substance of carbon black prepared by a conventional wet method and non-granulated carbon black, a carbon black-containing rubber wet master batch obtained by the above process and a rubber composition and a tire prepared by using the master batch.Type: ApplicationFiled: March 16, 2010Publication date: March 1, 2012Applicants: ASAHI CARBON, BRIDGESTONE CORPORATIONInventors: Atsushi Nakayama, Masaaki Izuchi, Fumiteru Nishiura, Takeshi Kasai, Kenji Hara, Takashi Yagi
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Publication number: 20120041129Abstract: The invention relates to rubber mixtures containing silane and having possibly functionalized diene rubbers and microgels, to a method for the production thereof, and to the use thereof to produce wet slipping resistant and low-rolling resistance motor vehicle tire treads having high abrasion resistance.Type: ApplicationFiled: January 19, 2010Publication date: February 16, 2012Applicant: LANXESS DEUTSCHLAND GMBHInventors: Norbert Steinhauser, Werner Obrecht, David Hardy, Thomas Gross
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Publication number: 20120041128Abstract: The present invention relates to a precipitated silica for elastomers and, more particularly, to a new highly dispersible and highly reinforcing precipitated silica for elastomers. The invention further provides the process for its production and rubber products made therefrom.Type: ApplicationFiled: October 11, 2009Publication date: February 16, 2012Applicant: Dimona Silica IndustriesInventor: Raisa Avgustovna Kosso
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Publication number: 20120041139Abstract: The present teachings provide a composition that includes a functionalized polyfluoropolyether and functionalized polybutadiene in a weight ratio of functionalized polyfluoropolyether/functionalized polybutadiene of from about 20/80 to about 80/20 in a solvent. The composition can be used to form a surface layer having a water contact angle of greater than about 90° and a hexanedecane contact angle greater than about 45°.Type: ApplicationFiled: August 13, 2010Publication date: February 16, 2012Applicant: XEROX CORPORATIONInventors: Jin Wu, Lanhui Zhang, Lin Ma
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Patent number: 8110625Abstract: Provided is a rubber composition comprising an inorganic filler, a compound having at least one group A reacting with a rubber and two or more groups B adsorbing on the inorganic filler described above in the same molecule, a compound having the group A reacting with a rubber and an amino group in the same molecule or acrylate or methacrylate having a specific structure and further comprising, if necessary, a silane coupling agent. This makes it possible to provide a rubber composition which is excellent in the dispersibility of an inorganic filler, so that it does not elevate a viscosity of a non-vulcanized rubber and does not damage the processability and which does not bring about roughening on the surface of a rubber and is improved in a storage modulus.Type: GrantFiled: August 4, 2010Date of Patent: February 7, 2012Assignees: Bridgestone Corporation, Kao CorporationInventors: Daisuke Nohara, Masaaki Tsuchihashi, Isao Nishi, Tetsuo Takano
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Patent number: 8106130Abstract: A modified conjugated diene polymer comprises a modifying group based on a low molecular weight compound having two or more tertiary amino groups and one or more alkoxysilyl groups in a molecule which bonds to a conjugated diene polymer obtained by polymerization of a conjugated diene compound or a conjugated diene polymer obtained by copolymerization of a conjugated diene compound and an aromatic vinyl compound. The process for producing the modified conjugated diene polymer comprises the steps of: polymerizing a conjugated diene compound or copolymerizing a conjugated diene compound and an aromatic vinyl compound in a hydrocarbon solvent using an alkali metal initiator and/or an alkaline earth metal initiator; and reacting active terminals of the resulting polymer with a low molecular weight compound having two or more tertiary amino groups and one or more alkoxysilyl groups in the molecule.Type: GrantFiled: July 19, 2007Date of Patent: January 31, 2012Assignee: Asahi Kasei Chemicals CorporationInventors: Ryoko Fukuoka, Haruo Yamada, Norifusa Ishimura
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Publication number: 20120016062Abstract: The present invention relates to an essential colourless binder composition comprising a naphthenic oil having a total content of naphthenics of 35%-80% by weight, based on the total weight of the naphthenic oil, and a petroleum or synthetic hydrocarbon resin, wherein the ratio of the naphthenic oil and the petroleum or synthetic hydrocarbon resin is between 10:90 to 90:10. The essential colourless binder composition is suitable for use in coloured asphalt compositions and emulsions.Type: ApplicationFiled: September 19, 2011Publication date: January 19, 2012Inventors: Wilhelmina Evelien Ruiter, Bert Jan Lommerts
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Patent number: 8084549Abstract: A composition is provided for use with an unsaturated elastomer. The composition may include a sulfur-functional linear polyorganosiloxane. The sulfur-functional linear polyorganosiloxane may include a chemically protected sulfur group. Under certain conditions, the sulfur group may react with the unsaturated elastomer. The invention includes embodiments that may relate to methods of making and using the sulfur-functional linear polyorganosiloxane in elastomer compositions.Type: GrantFiled: February 12, 2009Date of Patent: December 27, 2011Assignee: Continental AGInventors: Norberto Silvi, Robert James Perry, Ben Purushotam Patel, Paul Burchell Glaser, Brennan Alexander Smith
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Publication number: 20110306700Abstract: The invention relates to a rubber composition that is free of zinc or that contains less than 0.5 phr of zinc, which can be used for the manufacture of tyres, based on at least: one diene elastomer; one sulphur-based crosslinking system; one inorganic filler as reinforcing filler; one blocked mercaptosilane of general formula I below: (R3O)R2R1—Si—Z—S—C(?O)-A in which: R1 and R2, which are identical or different, represent a monovalent hydrocarbon-based group chosen from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms; R3 represents a monovalent hydrocarbon-based group chosen from linear or branched alkyls having from 1 to 4 carbon atoms; A represents hydrogen or a monovalent hydrocarbon-based group chosen from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms; Z represents a divalent bonding group comprising from 1 to 18 carbon atoms.Type: ApplicationFiled: December 18, 2009Publication date: December 15, 2011Applicant: Michelin Recherche ET Technique S.A.Inventors: Laure Belin, Karine Longchambon, José Carlos Araujo Da Silva
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Patent number: 8076404Abstract: The present invention relates to rubber compositions containing a filler and comprising (i) at least one rubber containing olefinic unsaturation and (ii) functionalized nano transition metal oxide and/or sulfide particles. The invention further relates to a method of manufacture of the rubber compositions and to the use of the compositions in tires, belts and/or hoses.Type: GrantFiled: May 22, 2007Date of Patent: December 13, 2011Assignee: Rubber Nano Products (Proprietary) LimitedInventors: Christopher Dennis Woolard, Katherine Garde, Robert Michael Bosch