Natural Rubber Patents (Class 524/575.5)
  • Patent number: 11794530
    Abstract: A tire with in-situ generated intrinsic puncture sealant layers and intrinsic noise damper comprising a supporting tire carcass having one or more layers of ply, an outer circumferential tread, and a radially inner layer, a pair of beads, sidewalls extending radially inward from the axial outer edges of a tread portion to join the respective beads, a sealant comprising at least one layer of sealant, disposed radially inwardly from said radially inner layer of said tire carcass, an intrinsic cellular noise damper as the innermost layer adjacent to the sealant, wherein said noise damper has a density less than 1.3 g/cm3; and wherein said sealant provides self-sealing properties to the tire.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: October 24, 2023
    Assignee: Triangle Tyre Co. Ltd.
    Inventors: Ramendra Nath Majumdar, Wang Dapeng
  • Patent number: 11781020
    Abstract: Composite particles may be produced by drying slurries containing silica particles and graphenic carbon particles in a liquid carrier. Elastomeric formulations comprising a base elastomer composition and the silica-graphenic carbon composite particles are also disclosed. The formulations possess favorable properties such as increased stiffness and are useful for many applications such as tire treads.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: October 10, 2023
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Lucas Dos Santos Freire, Qi Ding, Cynthia Kutchko, Shuyang Pan, Nathan J. Silvernail
  • Patent number: 11738599
    Abstract: The introduction of graphene as an additive in rubber compounds is disclosed. The product shows increased barrier protection for tire innerliners, with no tradeoffs in other characteristics.
    Type: Grant
    Filed: July 15, 2022
    Date of Patent: August 29, 2023
    Inventors: Douglas Paschall, Adel F. Halasa, Michael Brendan Rodgers
  • Patent number: 11732111
    Abstract: A natural rubber composition includes a base resin including natural rubber, a filler including carbon black and silica, and an additive. The carbon black has a diameter of 20 nm to 50 nm, and the silica has a surface area of 100 to 150 m2/g. The additive includes at least one of a coupling agent, an activator, a crosslinking agent, an accelerator, or an anti-aging agent.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: August 22, 2023
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Sung Hyun Lee, Hyun Ho Park, Jae Seok Lee
  • Patent number: 11653668
    Abstract: A chewing gum base comprises rubber derived from Russian Dandelion (TKS). Methods of extracting and purifying the rubber are provided. Gum base compositions and methods of compensating for variable ratios of elastomer:resin in the rubber are disclosed.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: May 23, 2023
    Assignee: WM. WRIGLEY JR. COMPANY
    Inventors: David R. Phillips, Xiaohu Xia
  • Patent number: 11597821
    Abstract: The introduction of graphene as an additive in truck tire treads is disclosed. The product shows increased electrical resistance in tire treads, with no tradeoffs in other characteristics.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: March 7, 2023
    Inventors: Douglas Paschall, Adel F. Halasa, Michael Brendan Rodgers
  • Patent number: 11572458
    Abstract: A rubber composition is based on at least one elastomer comprising epoxide functions, a crosslinking system comprising a polycarboxylic acid and an imidazole and at least one phenolic compound, the aromatic nucleus of said phenolic compound being substituted with at least a carboxyl group, a hydrogenocarbonyl group, an amino group or an aminoalkyl radical.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: February 7, 2023
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Anne-Lise Thuilliez, Odile Gavard-Lonchay
  • Patent number: 11292149
    Abstract: A new composition has been invented which for restores the appearance of finished wood surfaces. The composition includes between 20 and 40%, by volume, of at least two oils; between 60 and 80%, by volume, of an organic, nonpolar solvent; and, at least two colorants, with a first colorant comprising about twice, by volume of a second colorant. The at least two oils may be any combination of tung oil, boiled linseed oil, and, olive oil, preferably all three are present. The organic, nonpolar solvent may be high grade mineral spirits. The first colorant may be yellow oxide and the second colorant may be raw umber.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: April 5, 2022
    Inventor: Eric Trindl
  • Patent number: 11118020
    Abstract: Disclosed herein is method for preparing a masterbatch by dispersing chemically modified cellulose nanofibers having carboxy groups under acidic conditions and then mixing the dispersed cellulose nanofibers with rubber latex. More specifically, the present disclosure provides a method for producing a masterbatch, including: (A) a step of introducing a carboxy group to a cellulose-based raw material to prepare a modified cellulose; (B) a step of carrying out defibration treatment and dispersion treatment of the modified cellulose to prepare a cellulose nanofiber; (C) a step of acidifying the cellulose nanofiber to prepare an acid type cellulose nanofiber; and (D) a step of mixing the acid type cellulose nanofiber and a rubber component. The rubber composition having excellent strength such as tensile strength can be provided by using the obtained masterbatch.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 14, 2021
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Kotaro Ito, Yusuke Yasukawa
  • Patent number: 10850563
    Abstract: Provided is a pneumatic tire having excellent chipping resistance. The present invention relates to a pneumatic tire formed from a rubber composition, the rubber composition having an elongation at break of 540% or higher as measured under the following test conditions: Tensile rate: 8.3 m/sec, Temperature: 75° C., Specimen: No. 3 dumbbell.
    Type: Grant
    Filed: February 16, 2018
    Date of Patent: December 1, 2020
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Tetsuya Maekawa, Shinichiro Honda
  • Patent number: 10753053
    Abstract: Desired combinations of physical properties can be achieved with a pavement marking composition including non-crosslinked elastomeric materials dispersed within a polymeric material. Notably, the pavement marking composition does not include any reinforcing materials, such as, for example, ceramic fibers, asbestos, silicon dioxide, and/or talc. Despite the lack of reinforcing materials, the pavement marking composition has good tensile strength in both the downweb and crossweb directions.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: August 25, 2020
    Assignee: 3M Innovative Properties Company
    Inventor: Thomas P. Hedblom
  • Patent number: 10710408
    Abstract: A rubber compound for treads comprising a styrene-butadiene rubber (SBR), carbon black and a vulcanization system. The filler comprises 5 to 30 phr of a thermoplastic polymer, preferably polylactic acid, having a Tg ranging from 50 to 70° C., a molecular weight (Mw) not exceeding 200,000 g/mol and a crystallinity not exceeding 0%.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: July 14, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Gianluca Forte, Claudia Aurisicchio, Giammatteo Gaeta
  • Patent number: 10667957
    Abstract: A bandage comprising a base substrate, a wound covering portion, a first side coupling member and a second side coupling member, and a first side and second side adhesive portion. The base substrate includes a central region, a first side region and a second side region, and comprises an elastic member. The wound covering portion is positioned over the central region. The first side coupling member extends over the first side region. The second side coupling member extending over the second region. The first side adhesive portion is positioned on the first side region. The second side adhesive portion positioned on the second side region. A method of use as well as a protective carrier are likewise disclosed.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: June 2, 2020
    Assignee: BANDGRIP, INC.
    Inventors: Fred Smith, Keith Hoglund, Tom Pruter
  • Patent number: 10479843
    Abstract: The present invention provides a method for producing natural rubber with which the odors of solid natural rubber is easily reduced, and further which does not degrade physical properties such as heat aging resistance. The present invention relates to a method for producing natural rubber, the method including a sheeting step including sheeting a non-deproteinized solid natural rubber to form a natural rubber sheet, the natural rubber sheet having a moisture content of 20% or less.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: November 19, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ai Matsuura, Lucksanaporn Tarachiwin, Kamalin Kanyawararak, Hironori Inamoto, Noa Kaneko
  • Patent number: 10138359
    Abstract: The present invention aims to provide rubber compositions for tires that contain a natural rubber achieving a balanced improvement in abrasion resistance, breaking performance, and processability to achieve a balanced improvement in abrasion resistance, breaking performance, and processability, and also provide pneumatic tires containing such rubber compositions for tires. Included is a rubber composition for tires comprising a modified natural rubber prepared by treating natural rubber latex with a proteolytic enzyme, and then treating the treated natural rubber latex with a lipolytic enzyme and/or a phospholipid degrading enzyme. Also included is a rubber composition for tires, comprising a modified natural rubber prepared by centrifuging natural rubber latex to recover a latex fraction comprising latex particles having an average particle size of 0.25 ?m or less.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: November 27, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ai Matsuura, Lucksanaporn Tarachiwin, Hathainat Kum-Ourm
  • Patent number: 9920150
    Abstract: A process is described for the production of phosphorus-containing organic polymers through reaction of dialkyl phosphites with organic polymers comprising carbon-carbon double bonds in the presence of organic compounds that form free radicals under the reaction conditions, with covalent linkage of the phosphorus atom of the dialkyl phosphite to a carbon atom of the organic polymer.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: March 20, 2018
    Assignee: BASF SE
    Inventors: Alexander Koenig, Konrad Knoll
  • Patent number: 9862814
    Abstract: Provided are pneumatic tires or studless winter tires that achieve a balanced improvement in fuel economy, reinforcing properties (flex crack growth resistance, abrasion resistance, tensile strength, adhesive strength, resistance to air permeation), grip performance (wet-grip performance, performance on snow and ice), handling stability, and heat aging resistance, and methods for producing such a pneumatic tire or studless winter tire. The present invention relates to a pneumatic tire including at least one component selected from the group consisting of a sidewall, a base tread, a bead apex, a clinch apex, an innerliner, and an undertread, each of which is formed from a rubber composition that contains a highly purified, modified natural rubber whose pH is adjusted to 2 to 7, and carbon black and/or a white filler.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: January 9, 2018
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Toshiaki Sakaki, Yuka Yokoyama
  • Patent number: 9757983
    Abstract: This invention relates to a tire having a rubber component, such as a tread. with filler reinforcement containing surface modified graphene and precipitated silica which may be or may include pre-hydrophobated precipitated silica.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: September 12, 2017
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Ling Du, Xiaoping Yang, Carl Trevor Ross Pulford
  • Patent number: 9410033
    Abstract: The present invention provides a rubber composition for an undertread, which has improved in processability, fuel economy, and tensile properties in a balanced manner, and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for an undertread, including: a rubber component containing a modified natural rubber having a phosphorus content of 200 ppm or less; and carbon black and/or a white filler, wherein the modified natural rubber is contained in an amount of 5% by mass or more per 100% by mass of the rubber component.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: August 9, 2016
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yoshihiro Kagawa, Naoya Ichikawa
  • Patent number: 9217077
    Abstract: A sulfur-crosslinkable rubberizing mixture for strengthening elements in motor vehicle pneumatic tires comprises 70 to 100 phr (parts by weight, based on 100 parts by weight of total rubbers in the mixture) of natural rubber, up to 30 phr of at least one polybutadiene, 40 to 70 phr of at least one carbon black and a bonding system. Further, motor vehicle pneumatic tires are disclosed that comprise the sulfur-crosslinked rubberizing mixture. The key conflict between tear propagation resistance, stiffness and heat build-up is solved by virtue of the carbon black being a nanostructured carbon black with a rough surface.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: December 22, 2015
    Assignee: Continental Reifen Deutschland GmbH
    Inventors: Thorsten Torbruegge, Marc Kreye, Thomas Kramer, Carla Recker
  • Patent number: 9181378
    Abstract: The present invention provides a modified natural rubber that offers higher efficiency of graft polymerization or attachment of a polar group-containing compounds, and that possesses excellent low loss factor, wear resistance and fracture resistance when used as a rubber composition, a rubber composition using the modified natural rubber and a tire using the rubber composition. In the present invention, a polar group-containing compound is graft polymerized or attached under mechanical shear force to a natural rubber raw material having a nitrogen content of 0.4 mass % or less.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: November 10, 2015
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Taku Yamamoto, Haruki Minojima, Takeshi Kasai
  • Patent number: 9181355
    Abstract: The present invention provides a modified natural rubber having a reduced tan ?, a method for producing the modified natural rubber, a rubber composition produced using the modified natural rubber, and a pneumatic tire produced using the rubber composition. The present invention also provides a modified natural rubber having a reduced tan ?, a method for producing the modified natural rubber, a rubber composition produced using the modified natural rubber and achieving good fuel economy and abrasion resistance at the same time, and a pneumatic tire produced using the rubber composition. The present invention relates to a modified natural rubber having a phosphorus content of 200 ppm or less and a total content of sodium and potassium of 350 ppm or less. The invention also relates to a modified natural rubber having a phosphorus content of 200 ppm or less and a nitrogen content of 0.2% by mass or less.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: November 10, 2015
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Naoya Ichikawa, Toshiaki Sakaki, Lucksanaporn Tarachiwin, Kamalin Kanyawararak
  • Patent number: 9074075
    Abstract: A sulfur-crosslinkable rubberizing mixture for strengthening elements in motor vehicle pneumatic tires comprises 70 to 100 phr (parts by weight, based on 100 parts by weight of total rubbers in the mixture) of natural rubber, up to 30 phr of at least one polybutadiene, 40 to 70 phr of at least one carbon black and a bonding system. Further, motor vehicle pneumatic tires are disclosed that comprise the sulfur-crosslinked rubberizing mixture. The key conflict between tear propagation resistance, stiffness and heat build-up is solved by virtue of the carbon black being a nanostructured carbon black with a rough surface.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: July 7, 2015
    Assignee: Continental Reifen Deutschland GmbH
    Inventors: Thorsten Torbruegge, Marc Kreye, Thomas Kramer, Carla Recker
  • Patent number: 9034980
    Abstract: A pneumatic tire for a commercial vehicle with a tread, wherein at least the part of the tread which comes into contact with the road contains a sulphur-vulcanized rubber mixture. The sulphur-vulcanized rubber mixture contains 90 to 50 phr (parts by weight, based on 100 parts by weight, of all of the rubbers in the mixture) of natural rubber, 10 to 50 phr of at least one polybutadiene having a glass transition temperature Tg of ?110 to ?65° C. and 5 to 50 phr of at least one aliphatic and/or aromatic hydrocarbon resin having a softening point (ring and ball to ASTM E 28) of 0 to 150° C., and a mean molecular weight Mn of less than 2000 g/mol and a polydispersity D=Mw/Mn of 1 to 5.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: May 19, 2015
    Assignee: Continental Reifen Deutschland GmbH
    Inventors: Carla Recker, Philipp Koelle, Thomas Kramer, Christoph Jocher, Thorsten Torbruegge, Fabian Dettmer, Norbert Daldrup
  • Publication number: 20150126657
    Abstract: The present invention includes a process for producing treated filler that includes (a) treating a slurry that includes untreated filler where the untreated filler has not been previously dried, with a treating composition that includes a treating agent, thereby forming a treated filler slurry, and (b) drying the treated filler slurry to produce treated filler. The treating agent can include a polymer having (i) at least one first group that interacts with the untreated filler and (ii) at least one second group that interacts with a rubber matrix into which the treated filler is incorporated. The present invention also is directed to treated filler prepared by the process, as well as rubber compounding compositions and tires including the treated filler.
    Type: Application
    Filed: October 7, 2014
    Publication date: May 7, 2015
    Inventors: Timothy Allen Okel, Peter Lawrence Votruba-Drzal, Justin Jonathan Martin, Raphael O. Kollah, Truman Wilt, Brian K. Rearick, Clint Steven Edelman, Linda K. Anderson, Feng Wang, Kurt G. Olson
  • Patent number: 9023938
    Abstract: Method for the production of an initial rubber composition, in the course of which the following steps are carried out in succession: A—a rubber matrix, reinforcing fillers, and other components if required, with the exception of the cross-linking system, are introduced into a mixing means of the internal mixer type, comprising a mixing chamber in which there are mounted rotors which are driven in rotation and have radial projections forming a gap (e) between themselves and the vessel, B—said components are mixed in the chamber until a uniform mixture is obtained, care being taken to ensure that the temperature of the mixture remains at or below 170° C., after which C—the rotation speed of the rotors is adjusted so as to bring the rubber composition to a dropping temperature in the range from 180° C. to 240° C.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: May 5, 2015
    Assignees: Compagnie Generale des Etablissements Michelin, Michelin Recherche et Technique, S.A.
    Inventors: Jean-Marc Loubaresse, Marie Eloy, Floriandre Voisin, Gérald Huguenot, Julien Loyau
  • Publication number: 20150119496
    Abstract: Provided is a method of producing a wet master batch, including the step of: solid-liquid separating and dehydrating a coagulum slurry obtained by mixing a rubber latex with a carbon black slurry containing a carbon black dispersed in water and coagulating the mixture, the solid-liquid separating and dehydrating step including gravity filtering and vacuum filtering the coagulum slurry on a filtration filter and then pressurizing, by means of a pressurizer, the coagulum slurry on the outer peripheral surface of a drum, to thereby pressure dehydrate the coagulum slurry. Also provided is a solid-liquid separating and dehydrating apparatus for wet master batch production, which includes: a filtration filter; a filtration portion; a drum; and a pressurizer.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Yasuto YANAGISAWA
  • Patent number: 9010393
    Abstract: Tyre and rubber composition for tyre, based on at least one isoprene elastomer (for example natural rubber), an inorganic filler as reinforcing filler (for example silica) and a coupling system which provides the bonding between the said reinforcing inorganic filler and the isoprene elastomer, the said coupling system comprising, in combination: as first coupling agent, a silane sulphide compound; as second coupling agent, an at least bifunctional organosilicon compound (for example an organosilane or an organosiloxane) which can be grafted to the elastomer by means of an azodicarbonyl functional group (—CO—N?N—CO—).
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: April 21, 2015
    Assignee: Michelin Recherche et Technique, S.A.
    Inventors: Jose Carlos Araujo Da Silva, Nathalie Binde, Pierre Robert, Sebastien Sterin, Anne Veyland
  • Publication number: 20150059606
    Abstract: An object of the present invention is to provide a relief printing plate precursor for laser engraving that is excellent in rinsing properties for engraving residue and engraving sensitivity and can give a sharp engraved shape. Disclosed is a relief printing plate precursor for laser engraving comprising a relief-forming layer formed of a resin composition for laser engraving, or a crosslinked relief-forming layer obtained by crosslinking the relief-forming layer formed of the resin composition for laser engraving, wherein the resin composition for laser engraving comprises a binder polymer as Component A, and carbon black of which pH is higher than 6 and an average particle size when being dispersed into water is equal to or less than 500 nm as Component B.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Applicant: FUJIFILM CORPORATION
    Inventor: Yuichi YASUHARA
  • Patent number: 8962752
    Abstract: This invention relates to a rubber composition being excellent in the low heat buildup and fracture properties (resistance to crack growth). and more particularly to a rubber composition, characterized by compounding 10-100 parts by mass of an inorganic filler and/or carbon black based on 100 parts by mass of a rubber component including not less than 10 mass % of a modified conjugated diene-based polymer having a cis-1,4 bond content of not less than 90% and a vinyl bond content of not more than 1.2% and a primary amino group. In this case, the modified conjugated diene-based polymer is obtained by (1) reacting the predetermined conjugated diene-based polymer having an active terminal with a compound having two or more predetermined functional groups and (2) further reacting the resulting product with a compound having a primary amino group.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: February 24, 2015
    Assignee: Bridgestone Corporation
    Inventors: Junko Matsushita, Yoichi Ozawa
  • Publication number: 20150045497
    Abstract: The present application provides a polymer composite comprising at least one polymer and a reclaimed pyrolyzed carbon black (pCB), wherein the pCB comprises less than about 10 ?g/g of polycyclic aromatic hydrocarbons (PAH). Also provided are polymer composite and consumer-ready formulations of the low PAH pCB and methods of manufacturing such composites and formulations.
    Type: Application
    Filed: October 27, 2014
    Publication date: February 12, 2015
    Inventors: Vincent W. Y. WONG, Rui RESENDES, Timothy James CLARK
  • Patent number: 8952091
    Abstract: The present invention provides a rubber composition for an inner liner, which can achieve both excellent low heat build-up and high flex crack growth resistance while having processability excellent enough to eliminate the need for mastication, and further has good air impermeability, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for an inner liner, including: a rubber component that contains a modified natural rubber with a phosphorus content of 200 ppm or less, and carbon black and/or a white filler.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: February 10, 2015
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Mutsuki Sugimoto
  • Patent number: 8946334
    Abstract: A rubber composition for tires, which includes a rubber component containing a natural rubber component consisting of at least either a natural rubber or an epoxidized natural rubber, and an inorganic filler containing silica, and a pneumatic tire using such a rubber composition for tires are provided. The rubber composition can be used as a rubber composition for clinch apex, and in this case, the rubber component preferably consists of the natural rubber component, with the inorganic filler being contained in a range of 50 to 80 parts by mass and carbon black being contained in a range of 2 to 5 parts by mass relative to 100 parts by mass of the rubber component.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: February 3, 2015
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Yoichi Mizuno, Toshikazu Kondo
  • Patent number: 8921468
    Abstract: A rubber composition for a tire includes a rubber component containing at least one of a natural rubber and an epoxidized natural rubber, silica and a natural based wax, wherein the silica is contained in an amount of 10 parts by mass or more based on 100 parts by mass of the rubber component and the natural based wax is contained in an amount of 1.2% by mass or more and 2% by mass or less based on the total mass of the rubber composition for a tire, and to a tread, a side wall, a clinch and a tire using the rubber composition.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: December 30, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Tomoaki Hirayama, Takao Wada, Noboru Wakabayashi, Keiji Ikeda
  • Publication number: 20140364560
    Abstract: This invention relates to hydrolysable silanes useful in the modification of elastomers, and as coupling agents for diene elastomer compositions containing a filler. In particular the invention relates to novel hydrolysable silanes containing a piperazine ring and an ether or thioether linkage.
    Type: Application
    Filed: December 7, 2012
    Publication date: December 11, 2014
    Inventors: Michael Wolfgang Backer, Thomas Chaussee, Damien Deheunynck, Sebastien Grofils
  • Patent number: 8901206
    Abstract: The natural rubber of the present invention is natural rubber obtained by leaving standing for a prescribed period of time a hydrous coagulum obtained from a natural rubber latex to which a preservative is added and/or from a coagulum of a natural rubber latex to which a preservative is added and drying it. The natural rubber coagulum is inhibited from being changed in a molecular weight even in a standing step (aging) in a high moisture condition, whereby the natural rubber having stable mechanical properties is obtained. An isothiazoline base compound is used for the preservative. Further, a rubber composition containing the natural rubber is prepared, and a tire is produced by using the rubber composition.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: December 2, 2014
    Assignee: Bridgestone Corporation
    Inventor: Masahiro Kawashima
  • Publication number: 20140350174
    Abstract: The present invention relates to a method for producing a rubber composition obtained by compounding a rubber component (A) containing at least one kind selected from natural rubber and synthetic diene rubber, a filler containing an inorganic filler (B), a silane coupling agent (C), and thiourea, the method comprising kneading the rubber composition in plural stages, the rubber component (A), the whole or a part of the inorganic filler (B), the whole or a part of the silane coupling agent (C), and the thiourea being kneaded in the first stage of kneading, and thus provides a method for producing a rubber composition excellent in low-heat-generation property through enhancement of the reactivity between the coupling agent and the rubber component.
    Type: Application
    Filed: December 21, 2012
    Publication date: November 27, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Noriaki Yukimura, Satoshi Horie, Takumi Toda
  • Publication number: 20140350173
    Abstract: The present invention provides a method for producing a rubber composition provided by compounding a rubber component (A) comprising at least one selected from natural rubbers and synthetic diene rubbers, a filler containing an inorganic filler (B), a silane coupling agent (C), and at least one vulcanization accelerator (D) selected from specific compounds, wherein the rubber composition is kneaded in a plurality of stages and wherein, in the first stage (X) of kneading, a portion (A?) of the rubber component (A), all or a portion of the inorganic filler (B), all or a portion of the silane coupling agent (C), and all or a portion of the vulcanization accelerator (D) are added and kneaded, and in or after the second stage of kneading, the residual portion (A?) of the rubber component (A) is added and kneaded, and the method for producing a rubber composition enables production of a rubber composition capable of suitably having a low-heat-generation property by further improving the coupling function activity o
    Type: Application
    Filed: December 21, 2012
    Publication date: November 27, 2014
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Shigeaki Matsuo
  • Publication number: 20140329102
    Abstract: An adhesive includes a polymeric latex, a penetrant selected from the group consisting of: terpenes, polylimonene, limonene, carvone, a-pinene, citral, dipentene, 1,8-cineole, eucalyptol, citronellol, geraniol, citronellene, terpinen-4-ol, borneol, camphor, guayule resin, and combinations thereof; and a reinforcing filler. The adhesive has a solids content of 35-65% and a pH of 9 to 12. Articles of manufacture, such as tires and air springs incorporate the adhesive to join rubber interfaces. A method of making the adhesive is also is provided.
    Type: Application
    Filed: December 7, 2012
    Publication date: November 6, 2014
    Inventors: Amy M. Randall, William L. Hergenrother, Sheel Agarwal, Ashley S. Hilton
  • Patent number: 8875765
    Abstract: The present invention provides a rubber composition for a clinch apex which improves in fuel economy, flex crack growth resistance, and processability in a balanced manner, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a clinch apex, including: a modified natural rubber having a phosphorus content of 200 ppm or less; and at least one of carbon black and a white filler.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 4, 2014
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Isamu Tsumori, Naoya Ichikawa
  • Patent number: 8877831
    Abstract: Methods and compositions are provided that relate to weighted elastomers. The weighted elastomers may comprise an elastomer and a weighting agent attached to an outer surface of the elastomer. An embodiment includes a method of cementing that comprises providing a cement composition containing cement, water, and a weighted elastomer. In addition, the cement composition may be introduced into a subterranean formation and allowed to set therein.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: November 4, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Craig W. Roddy, Jeffery D. Karcher, Rickey L. Morgan, D. Chad Brenneis
  • Publication number: 20140316058
    Abstract: An elastomer composite with silica-containing filler is described, along with methods to make the same. The advantages achieved with the elastomer composite and methods are further described.
    Type: Application
    Filed: June 30, 2014
    Publication date: October 23, 2014
    Applicant: Cabot Corporation
    Inventors: Michael D. Morris, Anand Prakash, Frederick H. Rumpf
  • Patent number: 8846806
    Abstract: The present invention is directed to a process for producing treated filler including (a) treating a slurry of untreated filler which has not been previously dried, with a treating composition including an organosilane material of specified structure (I); and (b) drying the treated filler slurry. The present invention also is directed to treated filler prepared by the process, as well as rubber compounding compositions and tires including the treated filler.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 30, 2014
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Justin J. Martin, Timothy A. Okel, Raphael O. Kollah
  • Publication number: 20140287217
    Abstract: Elastomeric materials and articles of manufacture produced using elastomeric materials are disclosed. In an embodiment, a rubber-based elastomeric material includes a diene rubber component, a reinforcing component, and a wax component. The rubber-based elastomeric material is provided in the form of a film having a thickness of at least about 30 mils. The film exhibits a flexural modulus of less than about 0.06 MPa.
    Type: Application
    Filed: March 22, 2013
    Publication date: September 25, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: William Andrus Williams
  • Patent number: 8841361
    Abstract: A rubber composition includes an elastomer having an elongation at break (Eb) of about 50% or more according to ASTM-D 412 at 25° C., a water-insoluble keratin, and a reinforcing filler. A tire component including the composition and a method for making the composition are also disclosed.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: September 23, 2014
    Assignee: Bridgestone Corporation
    Inventors: William L. Hergenrother, Lori L. Shultz, Chenchy Jeffrey Lin
  • Publication number: 20140256845
    Abstract: Method for preparing a silica/natural rubber masterbatch, including: doping the silica with magnesium; preparing at least one dispersion of the resulting doped silica in water; bringing a natural rubber field latex into contact with the aqueous doped-silica dispersion and mixing them together so as to obtain a coagulum; recovering the coagulum; and drying the recovered coagulum so as to obtain the masterbatch.
    Type: Application
    Filed: October 10, 2012
    Publication date: September 11, 2014
    Applicant: MICHELIN RECHERCHE ET TECHNIQUE, S.A.
    Inventors: Benoit De Gaudemaris, Geraldine Laffargue, Julien Berriot
  • Publication number: 20140249251
    Abstract: Preparation of a masterbatch of diene elastomer and silica including preparing at least one silica dispersion in water; bringing into contact and mixing an elastomer latex and the aqueous silica dispersion in the presence of a metal salt having an at least divalent metal element, in order to obtain a coagulum; and recovering the coagulum and drying same in order to obtain the masterbatch. The metal cation molar ration, defined as the number of moles of metal cations of the metal salt per BET unit area of the silica, is between 9.375*10?7 and 1.875*10?5 mol/m2.
    Type: Application
    Filed: October 10, 2012
    Publication date: September 4, 2014
    Applicants: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, MICHELIN RECHERCHE ET TECHNIQUE, S.A.
    Inventors: Benoit De Gaudemaris, Geraldine Laffargue, Julien Berriot
  • Publication number: 20140249250
    Abstract: A method for producing a rubber composition containing a rubber wet master batch has a masticating process. The masticating process comprises step 1 of charging the rubber wet master batch into an enclosed kneading chamber that has a stirring rotor showing a rotation speed controllable automatically through a control unit and that is capable of detecting and outputting an internal temperature, step 2 of setting a first control time and a first target temperature in the control unit, and step 3 of stirring the inside of the kneading chamber while making a PID control for adjusting an actually measured temperature in the kneading chamber to the first target temperature through the control unit on the basis of information on the actually measured temperature and the first target temperature, thereby automatically controlling the rotation speed, until the first control time elapses after the completion of the two steps.
    Type: Application
    Filed: July 13, 2012
    Publication date: September 4, 2014
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Takashi Miyasaka
  • Publication number: 20140249252
    Abstract: A method for producing a rubber wet masterbatch includes a solidifying step of mixing a slurry solution containing a filler and a dispersing solvent with a rubber latex solution, and solidifying the resultant mixture to produce a filler-containing rubber solidified product, a dehydrating step of using a first uniaxial extruder to dehydrate the filler-containing rubber solidified product while the solidified product is heated into the range of 100 to 180° C., thereby producing a rubber wet masterbatch, and a drying plasticizing step of using a second uniaxial extruder to plasticize the rubber wet masterbatch while the masterbatch is heated into the range of 120 to 180 C, thereby producing the rubber wet masterbatch further decreased in water content by percentage. The method does not have cooling step between the dehydrating step and the drying plasticizing step.
    Type: Application
    Filed: September 18, 2012
    Publication date: September 4, 2014
    Applicant: TOYO TIRE & RUBBER CO., LTD.
    Inventor: Takashi Miyasaka
  • Publication number: 20140249247
    Abstract: Preparation of a masterbatch of diene elastomer and silica including preparing at least one silica dispersion in water; bringing into contact and mixing an elastomer latex and the aqueous silica dispersion in the presence of a metal salt in order to obtain a coagulum; and recovering the coagulum and drying the recovered coagulum in order to obtain the masterbatch. The molar content of zinc cations, defined as the number of moles of zinc cations of the zinc salt per BET unit area of the silica, is between 1.19*10?6 and 5.62*10?6 mol/m2.
    Type: Application
    Filed: October 10, 2012
    Publication date: September 4, 2014
    Applicant: MICHELIN RECHERCHE ET TECHNIQUE, S.A.
    Inventors: Benoit De Gaudemaris, Geraldine Laffargue, Julien Berriot