Sulfur Containing Chemical Treating Agent Patents (Class 525/332.6)
  • Patent number: 10369843
    Abstract: According to a production method of a rubber composition for tire of the present invention comprising a rubber component (A) comprising at least one selected from the group consisting of a natural rubber and a synthetic diene rubber, a filler, a coupling agent (D) of (CpH2p+1O)3—Si—(CH2)q—S—CO—CkH2k+1, and a vulcanizing agent (E) comprising a vulcanizer and a vulcanization accelerator, the method comprising: a step X1 of kneading all amount of A, a part of the filler and a part of D, a step X2 of kneading the kneaded product of step X1, the remaining amount of the filler and D, and a step F of kneading the kneaded product of step X2 and E, it is possible to produce a rubber composition for tire in which fuel efficiency and abrasion resistance are improved in a good balance.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: August 6, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ayuko Yamana, Yuka Yokoyama, Masako Nakatani, Takashi Miki, Takuya Horiguchi, Yoichi Mizuno, Takahiro Kawachi, Noboru Okabe, Natsuki Sugimoto, Kenichi Uesaka, Tetsuya Maekawa, Yumi Suzuki, Fumiya Kato
  • Patent number: 9169275
    Abstract: Organopolysiloxanes containing a sulfide-containing organic group, a long-chain alkyl group, and a hydrolyzable group are novel. The organopolysiloxanes are effective for improving the shelf stability of epoxy resin compositions.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: October 27, 2015
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Munenao Hirokami, Kazuhiro Tsuchida, Muneo Kudo
  • Patent number: 9162530
    Abstract: This invention relates to a tire having a rubber tread containing functionalized carbon nanotubes and particulate reinforcement comprised of precipitated silica.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: October 20, 2015
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Ling Du, Xiaoping Yang, Carl Trevor Ross Pulford
  • Patent number: 9090757
    Abstract: The invention relates to preparation of rubber reinforced with at least one of graphene and carbon nanotubes with specialized coupling agent and tire with component thereof.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: July 28, 2015
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Ralf Mruk, Annette Lechtenboehmer, Klaus Unseld, Claude Ernest Felix Boes, Frederic Gerard Auguste Siffer, Ling Du, Robert Fokko Roskamp, Leena Nebhani
  • Patent number: 9023926
    Abstract: The present invention relates to a process for producing rubber mixtures in a mixing process with, for example, a plurality of mixing stages, where these can optionally be divided into a plurality of sub-steps, comprising the mixing of the following components: one or more rubbers, one or more hydroxylated oxidic fillers, one or more sulphur-containing organosilicon and/or one or more hydroxypolysulphidic compounds, one or more anti-reversion agents selected from 1,6-bis(N,N-dibenzyl-thiocarbamoyldithio)hexane (CAS No.: 151900-44-6), 1,3-bis((3-methyl-2,5-dioxopyrrol-1-yl)methyl)benzene (CAS No.: 119462-56-5) and hexamethylene 1,6-bis(thiosulphate), disodium salt, dihydrate (CAS No.: 5719-73-3), individually and mixtures thereof, where these are incorporated into the mixture in the first mixing stage, one or more vulcanization additives, one or more rubber additives.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: May 5, 2015
    Assignee: LANXESS Deutschland GmbH
    Inventors: Melanie Wiedemeier, Hermann-Josef Weidenhaupt, Heinz Unterberg, Ulrich Feldhues
  • Patent number: 9023952
    Abstract: A method of producing a rubber compound, which includes mixing at least one cross-linkable unsaturated-chain polymer base, silica with a surface area of 100-220 m2/g, a first silane coupling agent in the polysulphide organosilane class, and a second silane coupling agent in the class of mercaptosilane protected in the form of thioester, and whereby the second silane coupling agent is added to the mix after the first silane coupling agent has reacted with the silica.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: May 5, 2015
    Assignee: Bridgestone Corporation
    Inventors: Francesco Botti, Davide Privitera
  • Patent number: 8952092
    Abstract: A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: February 10, 2015
    Assignee: BASF SE
    Inventors: Kostas S Avramidis, William J Kirk
  • Publication number: 20140378603
    Abstract: A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.
    Type: Application
    Filed: September 5, 2014
    Publication date: December 25, 2014
    Applicant: BASF SE
    Inventors: Kostas S. Avramidis, William J. Kirk
  • Patent number: 8893725
    Abstract: The invention provides a polymer prepared from a substituted 1,3-butadiene (such as neophytadiene) derived from a plant of the Nicotiana species. The invention also provides smoking articles and smokeless tobacco compositions that include the polymers described herein. Further, the invention provides a method of polymerizing a substituted 1,3-butadiene derived from a plant of the Nicotiana species, the method including reacting a substituted 1,3-butadiene derived from a plant of the Nicotiana species with one or more reagents selected from the group consisting of an anionic initiator, a radical initiator, and a Ziegler-Natta catalyst.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: November 25, 2014
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Michael Francis Dube, William Monroe Coleman, III
  • Patent number: 8895671
    Abstract: The present invention provides a vulcanizable composition containing a specific hydrogenated nitrile rubber, at least one cross-linking agent and carbon nanotubes, a process for preparing such composition and the use thereof for preparing vulcanizates. Said vulcanizates exhibit excellent heat performance, oil resistance and mechanical strength.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: November 25, 2014
    Assignee: LANXESS Deutschland GmbH
    Inventors: Christopher Ong, Stephen Pask, Sharon Guo, Yong Zhang, Lan Lu
  • 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
  • Patent number: 8846170
    Abstract: 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: Grant
    Filed: January 17, 2012
    Date of Patent: September 30, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Richard W Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
  • Publication number: 20140256886
    Abstract: There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, specific acidic crosslinkers and crosslinking accelerators, as a result of which the use of conventional crosslinkers, such as sulphur in particular, is no longer required. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile strength combined with good elongation at break.
    Type: Application
    Filed: October 10, 2012
    Publication date: September 11, 2014
    Inventors: Sven Brandau, Hans Magg, Achim Welle
  • Patent number: 8765859
    Abstract: Polymer-filler coupling compounds with the formula B-A-Sx—N are claimed. In these compounds, B is an azaheterocyclic oxygen or sulfur containing moiety, or an allyltin moiety; Sx is a polysulfide, where x is between 2 and about 10; A is a linking atom or group that forms a bridge between B and Sx; and N is a blocking group. Sx can be a disulfide. N can be a conventional blocking group or other group such as -A-B. Methods for using the polymer-filler coupling compounds to modify polymers containing unsaturated carbon-carbon bonds and promote filler dispersion are also claimed. Additionally, vulcanizable rubber compositions containing the polymer-filler coupling compounds and methods for making vulcanized rubber compositions using the polymer-filler coupling compounds are also claimed.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: July 1, 2014
    Assignee: Bridgestone Corporation
    Inventors: Yasuo Fukushima, William L. Hergenrother, Russell W. Koch
  • Patent number: 8729167
    Abstract: This disclosure generally relates to chain end modified elastomeric polymers and branched modified elastomeric polymers, their use in the preparation of elastomeric compositions, and articles prepared from chain end modified elastomeric polymers and branched modified elastomeric polymers. An elastomeric polymer composition is provided including the reaction product of at least a living anionic elastomeric polymer, a silane modifier compound, and a modifier compound.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: May 20, 2014
    Assignee: Styron Europe GmbH
    Inventors: Sven Thiele, Evemarie Hamann, Joachim Kiesekamp
  • Publication number: 20130331523
    Abstract: A method of producing a rubber compound, including a first mixing step of mixing at least one cross-linkable unsaturated-chain polymer base, silica, and a silane coupling agent in the mercaptoalkyl-silane class; and a final mixing step, in which a curing system is added to the mix. The silane coupling agent is used in adsorbed form on dibenzothiazyl disulphide.
    Type: Application
    Filed: December 23, 2011
    Publication date: December 12, 2013
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Davide Privitera
  • Publication number: 20130289172
    Abstract: A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.
    Type: Application
    Filed: October 13, 2011
    Publication date: October 31, 2013
    Applicant: BASF SE
    Inventors: Kostas S. Avramidis, William J. Kirk
  • Patent number: 8569409
    Abstract: A vulcanized elastomeric composition includes (i) a polymer reaction product of an anionic elastomeric polymer and a silane-sulfide modifier and (ii) a second elastomeric polymer different from the polymer reaction product such that the polymer reaction product comprises at least 30 weight percent of a total amount of the polymer reaction product and the second elastomeric polymer. Methods are described for making the polymer reaction product, their use in preparing vulcanized elastomeric compositions, and articles made from such compositions, including pneumatic tires, tire treads, belts, and the like.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: October 29, 2013
    Assignee: Styron Europe GmbH
    Inventors: Sven Thiele, Joachim Kiesekamp, Norbert Jantsch, Thomas Knispel
  • Patent number: 8552120
    Abstract: The present invention relates to a process of preparing 1,4-trans polybutadiene grafted with an aromatic organosulfur compound, the process comprising (a) preparing 1,4-trans polybutadiene by polymerizing 1,3-butadiene or butadiene derivatives in a nonpolar solvent in the presence of a particular catalyst, and (b) preparing the 1,4-trans polybutadiene grafted with an aromatic organosulfur compound by reacting the trans polybutadiene with an aromatic organosulfur compound. The organosulfur molecule in the molecular chain minimizes ultra high molecular weight fraction and narrows the molecular weight distribution, thereby enabling this polymer to show improved processability and tensile properties.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: October 8, 2013
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Gwang Hoon Kwag, Hoochae Kim, Seung Hwon Lee, Hwieon Park, Hyung Kyu Choi
  • Patent number: 8481447
    Abstract: This invention relates to a solid particulate substrate for use in the vulcanization of rubber and a process for the production thereof. The solid particulate substrate is coated with a coating containing a complexed acetometallate salt of sodium and a transition metal. The use of the solid particulate substrate in the vulcanization of rubber reduces the amount of transition metal oxide used in the vulcanization process.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: July 9, 2013
    Assignee: Rubber Nano Products (Proprietary) Limited
    Inventor: Robert M. Bosch
  • Patent number: 8470197
    Abstract: A crosslinked polysulfide-containing cycloaliphatic compound, useful as a crosslinker for filled sulfur-vulcanizable elastomer compositions, is represented by the general formula: [(CaH2a-)mG1(-CbH2bSx—)n?m]o[CcH2c-G2-CdH2dSy—]p[R]q wherein G1 is a saturated, monocyclic aliphatic group of valence n containing from 5 to 12 carbon atoms and optionally containing at least one halogen or a saturated monocyclic silicone [RSiO—]n[R2SiO—]r group of valence n; G2 is a saturated, divalent cyclic aliphatic group of valence 2 containing from 5 to 12 carbon atoms and optionally containing at least one halogen or a saturated monocyclic silicone [RSiO—]n[R2SiO—]r group of valence n; each R independently is a selected from the group consisting of a hydrogen atom, monovalent hydrocarbon of up to 20 carbon atoms and a halogen atom; each occurrence of subscripts a, b, c, d, m, n, o, p, q, x and y independently is an integer wherein a is 2 to 6; b is 2 to 6; c is 1 to 6; d is 1 to 6; m is 1 or 2; n is 3 to 5; o is a positive
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: June 25, 2013
    Assignee: Momentive Performance Materials Inc.
    Inventors: Richard W. Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
  • Patent number: 8436105
    Abstract: The invention relates to a composition that can be thermally cured, containing relative to the total composition, a) 5 to 90% by weight of a diene-based polymer or copolymer containing an olefinic double bond and/or an aromatically substituted olefin, wherein the polymer or copolymer is liquid, or paste-like, at 22° C. and has a glass transition temperature between ?30° C. and +15° C., measured according to a DSC method; b) a vulcanization system selected from the group consisting of: b1) sulfur, and one or more accelerator(s), b2) peroxidic or disulfidic vulcanization systems, b3) quinones, quinone dioximes, or dinitrosobenzene.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: May 7, 2013
    Assignee: Henkel AG & Co. KGaA
    Inventors: Rainer Kohlstrung, Takehito Yamada
  • Patent number: 8426526
    Abstract: The present invention provides a solid golf ball that exhibits a high resilience performance and a high flight performance and gives a good shot feeling. The present invention relates to a solid golf ball including: a core including at least one layer; and a cover including at least one layer, the cover being provided to cover the core, wherein the at least one layer of the core is prepared by vulcanization-molding a rubber composition including: (a) a base rubber; (b) a co-crosslinking agent; (c) an organic peroxide; (d) a filler; and (e) a disulfide compound represented by formula (I): R1—S—S—R2??(I) wherein R1 and R2 each represent any one of the following groups: an aromatic hydrocarbon group; an aliphatic hydrocarbon group having two or more carbon atoms; a heterocyclic hydrocarbon group; and an alicyclic hydrocarbon group, each of which is optionally substituted, and R1 is a group different from R2.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: April 23, 2013
    Assignee: SRI Sports Limited
    Inventors: Kazuhisa Fushihara, Yumi Kanemitsu
  • Patent number: 8420220
    Abstract: A rubber composition comprising 0.3 to 10 parts by mass of sulfur and 0.1 to 10 parts by mass of a sulfeneamide base vulcanization accelerator represented by the following Formula (I) based on 100 parts by mass of a rubber component: (wherein R1 to R10 are a hydrogen atom, a linear alkyl group having 1 to 4 carbon atoms or a branched alkyl group having 3 to 4 carbon atoms, and they may be the same or different; R11 is a hydrogen atom, a linear alkyl group having 1 to 10 carbon atoms or a branched alkyl group having 3 to 10 carbon atoms; R12 to R15 are a hydrogen atom, a linear alkyl group or alkoxy group having 1 to 4 carbon atoms or a branched alkyl group or alkoxy group having 3 to 4 carbon atoms, and they may be the same or different; and x represents an integer of 1 or 2).
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: April 16, 2013
    Assignee: Bridgestone Corporation
    Inventor: Yoshitaka Satou
  • Patent number: 8389639
    Abstract: A proton exchange membrane comprising modified hyper-branched polymer is disclosed. The proton exchange membrane includes 85-90 wt % of sulfonated tetrafluorethylene copolymer and 15-10 wt % of modified hyper-branched polymer. The modified hyper-branched polymer comprises the bismaleimide (BMI)-based hyper-branched polymer, and parts of the chain ends of the hyper-branched polymer are sulfonated by the sulfonic compound. Also, the modified hyper-branched polymer and sulfonated tetrafluorethylene copolymer are interpenetrated to form an interpenetrating polymer. Furthermore, the modification step could be performed before or after forming the interpenetrating polymer. For example, the sulfonation is proceeded after forming the interpenetrating polymer. Alternatively, the sulfonation of the hyper-branched polymer could be proceeded before the formation of the interpenetrating polymer.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: March 5, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Liang Chang, Ya-Ting Hsu, Jing-Pin Pan
  • Patent number: 8362155
    Abstract: [Problem] To provide a conjugated diene polymer cyclized product free from coloring, a conjugated diene polymer cyclized product that has a narrow molecular weight distribution and is free from coloring, and a method for producing these conjugated diene polymer cyclized products. [Means for Resolution] A conjugated diene polymer cyclized product having a Gardner color scale of not more than 3.0. A conjugated diene polymer cyclized product having a Gardner color scale of not more than 3.0 and a ratio of weight average molecular weight/number average molecular weight of not more than 1.5. A method for producing a conjugated diene polymer cyclized product includes adding water to a conjugated diene polymer solution obtained by polymerizing a conjugated diene in a solvent by using an organoalkali metal compound as an initiator, thereby terminating the polymerization and then subjecting the subject conjugated diene polymer to a cyclization reaction.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: January 29, 2013
    Assignee: Zeon Corporation
    Inventor: Toshio Kase
  • Patent number: 8334340
    Abstract: A sulfur-containing cycloaliphatic compound, useful as a crosslinker for filled sulfur-vulcanizable elastomer compositions, is represented by the general formula: G[—CaH2a—S—S(?O)b—R]n wherein G is a saturated, monocyclic aliphatic group of valence n containing from 5 to 12 carbon atoms and optionally containing at least one halogen or a saturated monocyclic silicone [RSiO—]n[R2SiO—]p group of valence n; each R independently is a 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 1 or 2; n is an integer of from 3 to 6; and p is an integer of from 0 to 3.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: December 18, 2012
    Assignee: Momentive Performance Materials, Inc.
    Inventors: Michael Joseph O'Brien, Robert James Perry, Richard W. Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
  • Patent number: 8236882
    Abstract: 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: Grant
    Filed: November 19, 2004
    Date of Patent: August 7, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Oliver Klockmann, Andre Hasse, Hans-Detlef Lughinsland
  • Patent number: 8217103
    Abstract: A chain end modified polymer comprising the reaction product of a living anionic elastomeric polymer and a silane-sulfide modifier A preferred class of modifiers includes compounds represented by the formula: (RO)x(R)ySi—R?—S—SiR3, wherein Si is silicon; S is sulfur; O is oxygen; x is an integer selected from 1, 2 and 3; y is an integer selected from 0, 1, and 2; x+y=3; R is the same or different and is: (C1-C16) alkyl; and R? is aryl, alkylaryl, or (C1-C16) alkyl. The invention further includes methods for making such chain end modified polymers, their use in preparing vulcanized elastomeric polymer compositions, and articles made from such compositions, including pneumatic tires, tire treads, belts, and the like. The subject compositions exhibit lower Tan ? at 60° C. values, while maintaining good processing characteristics, and a good balance of physical properties, including: abrasion resistance, tensile strength, modulus and elongation at break.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: July 10, 2012
    Assignee: Styron Europe GmbH
    Inventors: Sven Thiele, Joachim Kiesekamp, Norbert Jantsch, Thomas Knispel
  • Publication number: 20120135823
    Abstract: An object of the present invention is to provide a golf ball having high resilience. The gist of the present invention resides in selecting an organic sulfur compound used for a golf ball rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) the organic sulfur compound from organic sulfur compounds having specific structures such that a sum of substituent constants of the substituents X in a structure represented by the following formula (4) is 0.2 or more and SP value of the structure represented by the following formula (4) is in a range from 19.0 (J/cm3) using the same.
    Type: Application
    Filed: October 20, 2011
    Publication date: May 31, 2012
    Inventors: Ayaka HIBI, Chiemi Mikura, Kazuhisa Fushihara, Yumi Kanemitsu, Mikio Yamada
  • Patent number: 8124206
    Abstract: 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: Grant
    Filed: October 30, 2008
    Date of Patent: February 28, 2012
    Assignee: Momentive Performance Materials, Inc.
    Inventors: Richard W. Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
  • Patent number: 8084547
    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: Grant
    Filed: April 17, 2008
    Date of Patent: December 27, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventor: Werner Obrecht
  • Patent number: 8063155
    Abstract: The invention relates to a sulphur donor curing agent comprising a combination of between 10 and 90 wt % of a mixture of polysulphides of poly(alkyl phenol) and between 90 and 10 wt. % a compound of the formula R?NHCONHR? were R? and R? are the same or different and are hydrogen oa an alkyl or aryl radical having 1 to 20 carbon atoms and methods of curing an EPDM-type rubber elastomer with the composition which presents no risk of the formation of nitrosamines.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: November 22, 2011
    Assignee: Arkema France
    Inventor: Thierry Aubert
  • Patent number: 8058357
    Abstract: A method for preparing a tire tread, the method comprising vulcanizing a vulcanizable composition comprising a rubber component including a functionalized polymer and a cure system, where the cure system includes sulfur and a disulfide compound represented by the formula I R1—S—S—R3—S—S—R2 where R3 represents a divalent organic group and R1 and R2 each independently include a monovalent organic group including a nitrogen atom.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: November 15, 2011
    Assignee: Bridgestone Corporation
    Inventors: Amy Randall, Terrence E. Hogan, William L. Hergenrother
  • Patent number: 8039538
    Abstract: A rubber composition for a tire having improved in low fuel efficiency, wet skid performance, abrasion resistance, and steering stability with favorable balance, and tire which has tread, using the same. A rubber composition for a tire, comprising 30 to 150 parts by weight of silica having a nitrogen adsorbing-specific surface area of 20 to 200 m2/g, and a pH of 7.0 to 12.0 when the silica is dispersed in water to be 5% aqueous solution, based on 100 parts by weight of a rubber component, and a tire which has a tread, using the same.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: October 18, 2011
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Kenichi Uesaka, Kazuo Hochi
  • Patent number: 8017694
    Abstract: Nonconjugated conductive polymers, which are all polymers that have a ratio of double bonds to total bonds of less than ½ are doped with iodine to produce compositions with unexpected characteristics in this invention. The mechanical and elastomeric properties of a nonconjugated polymer can be enhanced by doping the polymer with an electron acceptor such as iodine, in order to cure the polymer. Among the nonconjugated polymers are the cis-1,4-polyisoprene, cis-1,4 polybutadiene, styrene-butadiene copolymers (SBR), ethylene-propylene-diene monomer and poly (?-pinene). A heated mixture of iodine and sulfur produces a faster rate of vulcanization of rubber than using sulfur alone.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: September 13, 2011
    Inventor: Mrinal Thakur
  • Patent number: 8017696
    Abstract: Vulcanizable elastomeric compositions and vulcanizates are prepared by employing a titanium compound. The titanium compound is believed to enhance the reaction between a silica particle and a silica-reactive compound.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: September 13, 2011
    Assignee: Bridgestone Corporation
    Inventors: Chenchy Jeffrey Lin, Christine Rademacher, Shunji Araki
  • Patent number: 7987880
    Abstract: The rubber composition for a tire base tread includes a rubber component containing not less than 15% by weight of a terminal-modified diene rubber having a number average molecular weight prior to modification of 150000 to 400000, a filler, and a compound (vulcanizing agent) represented by the following general formula (1) in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the rubber component: (wherein R represents a benzyl group, and n represents an integer of 3 to 12.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: August 2, 2011
    Assignee: Toyo Tire & Rubber Co., Ltd.
    Inventor: Norihiko Nakamura
  • Patent number: 7960474
    Abstract: A single-component high-temperature-curing reactive composition based on natural and/or synthetic elastomers having olefinic double bonds and on vulcanizing agents is provided. Such compositions contain at least one liquid polyene with a molecular weight between 400 and 80,000, preferably between 800 and 25,000; at least one block copolymer with at least one polyene block and at least one saturated block; and a vulcanizing system of sulfur and accelerators and/or quinone oximes, if applicable. Such high-temperature-curing reactive compositions are useful as single-component adhesives, sealant or coating compositions or sealing compounds in automobile body manufacture.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: June 14, 2011
    Assignee: Henkel AG & Co. KGaA
    Inventors: Klaus Rappmann, Rainer Kohlstrung
  • Patent number: 7923518
    Abstract: The present application provides novel nitrile rubbers comprising repeating units of at least one ?,?-unsaturated nitrile, at least one conjugated diene and optionally one or more further copolymerizable monomers which nitrile rubbers are distinguished by a specific calcium content as well as a specific chlorine content and dispose of specific thio end groups. Additionally, an improved polymerization and work-up process is provided to produce the aforementioned nitrile rubbers.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: April 12, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventor: Werner Obrecht
  • Publication number: 20100311914
    Abstract: This invention relates to a solid particulate substrate for use in the vulcanization of rubber and a process for the production thereof. The solid particulate substrate is coated with a coating containing a complexed acetometallate salt of sodium and a transition metal. The use of the solid particulate substrate in the vulcanization of rubber reduces the amount of transition metal oxide used in the vulcanization process.
    Type: Application
    Filed: October 16, 2008
    Publication date: December 9, 2010
    Applicant: Rubber Nano Products (Proprietary)Limited
    Inventor: Robert M. Bosch
  • Patent number: 7803882
    Abstract: The present invention relates to sulphur-crosslinked hydrogenated vinylpolybutadienes which serve for production of technical rubber items and of tyre components and have very good recovery performance over a wide temperature range.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: September 28, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Andreas Bischoff, Werner Obrecht
  • Patent number: 7732522
    Abstract: Reduced hysteresis silica-containing black sidewall compounds having increased toughness properties are provided, as are methods for preparing the same. Tires comprising the black sidewall compounds prepared according to the present embodiments are also provided.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: June 8, 2010
    Inventors: David G. Abdallah, Joseph M. Lanzarotta
  • Patent number: 7662891
    Abstract: To provide a compound which has a higher vulcanization efficiency and superior heat aging resistance compared to conventional compounding agents for rubber compositions and which is environmentally friendly. An amine salt compound of a carboxylic acid containing a thermal dissociation portion having the Formula (I): wherein R represents an organic group selected from a C1 to C20 alkyl group, a C3 to C10 cycloalkyl group, a C6 to C20 aryl group and a C7 to C30 alkaryl group, R1, R2 and R3 independently represent a hydrogen atom or a C1 to C20 organic group which may have a heteroatom and/or a substituent group and X represents a C2 to C20 organic group which may have a heteroatom and/or a substituent group and a compounding agent for rubber vulcanization and a rubber composition containing the same.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: February 16, 2010
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Takashi Matsuda, Wonmun Choi
  • Publication number: 20100000639
    Abstract: A method for preparing a tire tread, the method comprising vulcanizing a vulcanizable composition comprising a rubber component including a functionalized polymer and a cure system, where the cure system includes sulfur and a disulfide compound represented by the formula I R1—S—S—R3—S—S—R2 where R3 represents a divalent organic group and R1 and R2 each independently include a monovalent organic group including a nitrogen atom.
    Type: Application
    Filed: December 31, 2008
    Publication date: January 7, 2010
    Inventors: Amy Randall, Terrence E. Hogan, William L. Hergenrother
  • Patent number: 7625983
    Abstract: A process for the preparation of a functionalized, coupled or starred block copolymer which is usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, one at least of said blocks consisting of a polyisoprene and at least one other block consisting of a diene elastomer other than a polyisoprene the molar ratio of units originating from one or more conjugated dienes of which is greater than 15%.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: December 1, 2009
    Assignee: Michelin-Recherche et Technique S.A.
    Inventor: Pierre Lesage
  • Publication number: 20090171033
    Abstract: [Problem] To provide a conjugated diene polymer cyclized product free from coloring, a conjugated diene polymer cyclized product that has a narrow molecular weight distribution and is free from coloring, and a method for producing these conjugated diene polymer cyclized products. [Means for Resolution] A conjugated diene polymer cyclized product having a Gardner color scale of not more than 3.0. A conjugated diene polymer cyclized product having a Gardner color scale of not more than 3.0 and a ratio of weight average molecular weight/number average molecular weight of not more than 1.5. A method for producing a conjugated diene polymer cyclized product includes adding water to a conjugated diene polymer solution obtained by polymerizing a conjugated diene in a solvent by using an organoalkali metal compound as an initiator, thereby terminating the polymerization and then subjecting the subject conjugated diene polymer to a cyclization reaction.
    Type: Application
    Filed: June 13, 2005
    Publication date: July 2, 2009
    Inventor: Toshio Kase
  • Patent number: 7553910
    Abstract: The invention relates to a process for preparing dithiols derivatized with dithiocarbamic acids, in which the derivatized dithiols are obtained in high yield and purity.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: June 30, 2009
    Assignee: LANXESS Deutschland GmbH
    Inventors: Hartmuth Buding, Hermann-Josef Weidenhaupt, Winfried Jeske, Thomas Kleiner
  • Patent number: 7544729
    Abstract: The present invention relates to a process for producing rubber mixtures, to the rubber mixtures obtainable by the process, to the use of rubber mixtures for producing tires or semi-finished products for tires and crosslinked elastomer molded articles which are obtained by vulcanization of the rubber mixtures produced according to the present invention.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: June 9, 2009
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Lothar Steger, Thomas Früh, Ludger Heiliger
  • Publication number: 20090020731
    Abstract: Nonconjugated conductive polymers, which are all polymers that have a ratio of double bonds to total bonds of less than ½ are doped with iodine to produce compositions with unexpected characteristics in this invention. The mechanical and elastomeric properties of a nonconjugated polymer can be enhanced by doping the polymer with an electron acceptor such as iodine, in order to cure the polymer. Among the nonconjugated polymers are the cis-1,4-polyisoprene, cis-1,4 polybutadiene, styrene-butadiene copolymers (SBR), ethylene-propylene-diene monomer and poly (?-pinene). A heated mixture of iodine and sulfur produces a faster rate of vulcanization of rubber than using sulfur alone.
    Type: Application
    Filed: October 2, 2008
    Publication date: January 22, 2009
    Inventor: Mrinal Thakur