Sulfur Containing Chemical Treating Agent Patents (Class 525/332.4)
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Patent number: 9757898Abstract: A method of bonding a vulcanized elastomer is provided comprising the steps of; providing an adhesive comprising a primary acrylate monomer, a reactive flexibilizing monomer, and further optionally comprising a toughener, an adhesion promoter and a free radical initiator, then depositing the adhesive on at least one surface of an elastomer or a second substrate, wherein the elastomer is a vulcanized elastomer, then bringing the elastomer substrate and second substrate together with the adhesive disposed therebetween, and allowing the adhesive to cure and bond the elastomer and second substrate together at a temperature of less than about 100° C. to produce a bonded structure.Type: GrantFiled: August 18, 2015Date of Patent: September 12, 2017Assignee: LORD CorporationInventors: Jian-Piang Huang, Ernest B. Troughton, Jr., Norah Bate
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Patent number: 9688834Abstract: An NBR composition including an NBR polymer, a vulcanizing agent, a vulcanizing accelerator, and carbon black, wherein the carbon black includes a combination of MT carbon black and carbon black having an iodine absorption number of 20 mg/g or less and a DBP absorption number of 40 cm3/100 g or more, and has a total added amount of 110 to 250 parts by weight based on 100 parts by weight of the NBR polymer, and the amount of the MT carbon black is larger than that of the carbon black having an iodine absorption number of 20 mg/g or less and a DBP absorption number of 40 cm3/100 g or more and the amount of the carbon black having an iodine absorption number of 20 mg/g or less and a DBP absorption number of 40 cm3/100 g or more is 10 to 70 parts by weight based on 100 parts by weight of the NBR polymer, and a metal laminate obtained by laminating the NBR composition.Type: GrantFiled: March 6, 2012Date of Patent: June 27, 2017Assignee: NOK CorporationInventors: Atsushi Yokota, Toshihiro Higashira
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Patent number: 9657158Abstract: The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.Type: GrantFiled: July 28, 2015Date of Patent: May 23, 2017Assignee: ARLANXEO Deutschland GmbHInventors: Ricarda Leiberich, Joachim Ritter, Hanns-Ingolf Paul, Udo Wiesner, Holger Luesgen
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Patent number: 9487614Abstract: A process for the radical grafting of a graft to a diene elastomer, comprising the following stages: a. dissolving, with stirring, at least one diene elastomer and at least one thiol derivative as graft in a solvent comprising a mixture of at least one polar solvent and at least one nonpolar solvent, b. heating the homogeneous reaction mixture obtained in the preceding stage to the temperature of the grafting reaction, and c. once the temperature of the grafting reaction has been reached, adding the radical initiator in order to bring about the grafting of the graft to the units of the elastomer comprising unsaturations. This radical grafting process makes it possible to achieve high grafting yields which can reach 100%.Type: GrantFiled: December 17, 2013Date of Patent: November 8, 2016Assignees: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, MICHELIN RECHERCHE ET TECHNIQUE, S.A.Inventors: Rachid Matmour, Robert Ngo, Nicolas Seeboth
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Patent number: 8981012Abstract: The present invention provides novel, modified polydicyclopentadienes and methods to prepare modified polydicyclopentadienes. The modified polydicyclopentadienes prepared by the methods of the invention are useful in many applications including new and useful solid phases for chromatography.Type: GrantFiled: July 8, 2009Date of Patent: March 17, 2015Assignee: University of Iowa Research FoundationInventors: Ned B. Bowden, Mathew Perring
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Patent number: 8835562Abstract: Improved methods for preparing sulfonated block polymers with acyl sulfates in non-halogenated aliphatic solvents are provided. The methods include the sulfonation of a precursor block polymer with an acyl sulfate in a reaction mixture further comprising at least one non-halogenated aliphatic solvent to form a sulfonated block polymer, wherein the initial concentration of the precursor block polymer is in the range of from about 0.1 wt % to a concentration that is below the limiting concentration of the precursor block polymer based on the total weight of the reaction mixture. A sulfonation degree of greater than about 1.0 milliequivalent sulfonic acid per gram sulfonated block polymer can be achieved substantially free of polymer precipitation and free of disabling gelation.Type: GrantFiled: July 7, 2009Date of Patent: September 16, 2014Assignee: Stepan CompanyInventors: Gregory Paul Dado, Dale Lee Handlin, Jr., Carl Lesley Willis
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Publication number: 20140107284Abstract: There is disclosed a functionalized elastomer of formula I where R1, R2 and R3 are independently C1 to C8 alkyl or C1 to C8 alkoxy, with the proviso that at least two of R1, R2 and R3 are C1 to C8 alkoxy; R4 is C1 to C8 alkanediyl, C1 to C8 arylene, C1 to C8 alkylarylene, C1 to C8 arylalkanediyl, or a covalent bond; R5 is C2 alkanediyl; Si is silicon; X is sulfur or oxygen; and P is a diene based elastomer, and n is 1 or 2.Type: ApplicationFiled: October 12, 2012Publication date: April 17, 2014Inventor: Leena Nebhani
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Patent number: 8552120Abstract: 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: GrantFiled: September 16, 2009Date of Patent: October 8, 2013Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Gwang Hoon Kwag, Hoochae Kim, Seung Hwon Lee, Hwieon Park, Hyung Kyu Choi
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Patent number: 8552121Abstract: A method for providing a polymer having terminal functionality that includes at least one sulfur atom and at least one silicon or tin atom involves reacting a terminally active polymer with a cyclic compound that includes in its ring structure at least one Si or Sn atom and at least one S atom, optionally at adjacent positions of the ring structure.Type: GrantFiled: November 8, 2010Date of Patent: October 8, 2013Assignee: Bridgestone CorporationInventor: Yuan-Yong Yan
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Patent number: 8426526Abstract: 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: GrantFiled: September 9, 2010Date of Patent: April 23, 2013Assignee: SRI Sports LimitedInventors: Kazuhisa Fushihara, Yumi Kanemitsu
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Publication number: 20120232223Abstract: A method for providing a polymer having terminal functionality that includes at least one sulfur atom and at least one silicon or tin atom involves reacting a terminally active polymer with a cyclic compound that includes in its ring structure at least one Si or Sn atom and at least one S atom, optionally at adjacent positions of the ring structure.Type: ApplicationFiled: November 8, 2010Publication date: September 13, 2012Applicant: BRIDGESTONE CORPORATIONInventor: Yuan-Yong Yan
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Publication number: 20120180937Abstract: A method for preparing a functionalized polymer, the method comprising providing a reactive polymer, where the reactive polymer includes 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: ApplicationFiled: March 27, 2012Publication date: July 19, 2012Inventors: Terrence E. Hogan, William L. Hergenrother
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Patent number: 8222346Abstract: The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a center region that is rich in mono alkenyl arene units. Also disclosed is a method for manufacture of the block copolymer.Type: GrantFiled: September 22, 2004Date of Patent: July 17, 2012Assignee: Dais-Analytic Corp.Inventors: Liwei Cao, Scott G. Ehrenberg, Joseph M Serpico
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Patent number: 8207275Abstract: A functionalized polymer defined by the formula ?-R1-?, where ? is a polymer chain, R1 is a bond or a divalent organic group, and ? is a sulfur-containing heterocycle.Type: GrantFiled: May 24, 2010Date of Patent: June 26, 2012Assignee: Bridgestone CorporationInventors: Terrence E. Hogan, Christine Rademacher, William Hergenrother, David F. Lawson
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Patent number: 8198378Abstract: The present invention relates to a preparation method of aromatic organosulfur functionalized 1,4-cis polybutadiene comprising: polymerizing 1,3-butadiene or butadiene derivative in the presence of a specific catalyst in a nonpolar solvent to prepare 1,4-cis polybutadiene; and reacting the resultant polybutadiene with an aromatic organosulfur compound. Such prepared aromatic organosulfur functionalized 1,4-cis polybutadiene is without ultrahigh molecular weight region and, thus, has narrow molecular weight distribution.Type: GrantFiled: October 20, 2008Date of Patent: June 12, 2012Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Gwang Hoon Kwag, Pil Sung Kim, Seung Hwon Lee, Hyung Kyu Choi, Hyun Jin Kim
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Publication number: 20120135823Abstract: 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: ApplicationFiled: October 20, 2011Publication date: May 31, 2012Inventors: Ayaka HIBI, Chiemi Mikura, Kazuhisa Fushihara, Yumi Kanemitsu, Mikio Yamada
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Patent number: 8058357Abstract: 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: GrantFiled: December 31, 2008Date of Patent: November 15, 2011Assignee: Bridgestone CorporationInventors: Amy Randall, Terrence E. Hogan, William L. Hergenrother
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Patent number: 8058365Abstract: A proton conductive membrane displays sufficient proton conductivity even at low humidities and low temperatures. The proton conductive membrane includes: a block copolymer including an ion conductive polymer segment (A) and an ion nonconductive polymer segment (B), the segment (A) and the segment (B) being covalently bound in a manner such that main chain skeletons of the segments are covalently bound at aromatic rings thereof through binding groups, (i) the membrane having a morphology including a microphase separated structure, (ii) the ion conductive polymer segment (A) forming a continuous phase.Type: GrantFiled: December 8, 2004Date of Patent: November 15, 2011Assignee: JSR CorporationInventors: Junji Kawai, Yosuke Konno, Kohei Goto
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Patent number: 8030411Abstract: Embodiments of the disclosed polymer composition comprise a first unsaturated polymer or polymer precursor, and an effective amount of a peptizer. The peptizer typically comprises a heteroaryl or a heterocyclic compound, other than morpholine as disclosed in assignee's prior applications. Disclosed polymer compositions are useful for making sports equipment, such as at least one layer of a golf ball, often a core. Because the compositions are useful for making golf balls, materials commonly known for making such golf balls can be used in combination with the polymer composition. A method for forming a golf ball also is disclosed. The method comprises providing disclosed compositions and then forming at least one component of a golf using the composition.Type: GrantFiled: December 15, 2006Date of Patent: October 4, 2011Assignee: Taylor Made Golf Company, Inc.Inventors: Hyun J. Kim, Hong G. Jeon
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Patent number: 7803882Abstract: 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: GrantFiled: October 31, 2006Date of Patent: September 28, 2010Assignee: LANXESS Deutschland GmbHInventors: Andreas Bischoff, Werner Obrecht
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Publication number: 20100194050Abstract: Article based on an elastomeric composition (C) comprising a crosslinked blend (B) of at least: (1) one substantially saturated synthetic elastomer; and (2) a copolymer containing repeating units derived from at least one conjugated diene and at least one ?,?-unsaturated nitrile, the article having been subjected to a surface halogenation treatment.Type: ApplicationFiled: July 29, 2008Publication date: August 5, 2010Applicant: INERGY AUTOMOTIVE SYSTEMS RESEARCH (Societe Anonyme)Inventors: Michel Oulie, Herve Runarvot
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Patent number: 7619036Abstract: Copolymers of fluorinated polydienes and sulfonated polystyrene and their use in fuel cell membranes, batteries, breathable chemical-biological protective materials, and templates for sol-gel polymerization.Type: GrantFiled: March 21, 2005Date of Patent: November 17, 2009Assignee: University of Tennessee Research FoundationInventors: Jimmy W. Mays, Samuel P. Gido, Tianzi Huang, Kunlun Hong
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Publication number: 20090156751Abstract: The present invention relates to a preparation method of aromatic organosulfur functionalized 1,4-cis polybutadiene comprising: polymerizing 1,3-butadiene or butadiene derivative in the presence of a specific catalyst in a nonpolar solvent to prepare 1,4-cis polybutadiene; and reacting the resultant polybutadiene with an aromatic organosulfur compound. Such prepared aromatic organosulfur functionalized 1,4-cis polybutadiene is without ultrahigh molecular weight region and, thus, has narrow molecular weight distribution.Type: ApplicationFiled: October 20, 2008Publication date: June 18, 2009Inventors: Gwang Hoon Kwag, Pil Sung Kim, Seung Hwon Lee, Hyung Kyu Choi, Hyun Jin Kim
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Patent number: 7470742Abstract: The present invention provides a rubber composition for covering a carcass cord, which makes it possible to consider an effect on environment, prepare for decrease in supply quantity of petroleum resources in future, reduce rolling resistance and improve rubber strength and processability, and a tire prepared by using the rubber composition. The rubber composition for covering a carcass cord of the present invention comprises 25 to 80 parts by mass of silica, 1 to 15 parts by mass of a silane coupling agent and 3 to 30 parts by mass of an organic vulcanizing agent represented by the following general formula (1): —(R—Sx)n— wherein R is —(CH2—CH2—O)m—CH2—CH2—; x is an integer of 2 to 6; n is an integer of 10 to 400; and m is an integer of 2 to 5, based on 100 parts by weight of a diene rubber, and a tire prepared by using the rubber composition.Type: GrantFiled: June 12, 2007Date of Patent: December 30, 2008Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Tetsuya Kunisawa
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Patent number: 7163988Abstract: Disclosed is an aromatic sulfonic acid ester derivative represented by the formula (1); in the formula, X is an atom or a group selected from a halogen atom excluding fluorine, —OSO3CH3 and —OSO3CF3, A is a divalent electron attractive group, B is a divalent electron donating group or a direct bonding, Ra is a hydrocarbon group of 1 to 20 carbon atoms, Ar is an aromatic group having a substituent of —SO3Rb (wherein Rb is a hydrocarbon group of 1 to 20 carbon atoms), m is an integer of 0 to 10, n is an integer of 0 to 10 and k is an integer of 1 to 4. Also disclosed is a process for producing a polyarylene having a sulfonic acid group, which process comprises the steps of coupling polymerization of an aromatic compound containing the derivative of the formula (1), to prepare a polyarylene and hydrolysis of the polyarylene, and which process has high safety and is easily capable of controlling the amount of sulfonoc acid group introduced into a polymer and the introducing position thereof.Type: GrantFiled: August 19, 2003Date of Patent: January 16, 2007Assignee: JSR CorporationInventors: Igor Rozhanskii, Masayuki Takahashi, Kohei Goto, Yousuke Konno, Toshihiro Ohtsuki, Yoshitaka Yamakawa, Toshiaki Kadota
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Patent number: 7160955Abstract: Polymers grafted with a compound of formula I, formula (I) wherein the general symbols are as defined in claim 1, have outstanding stability against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation [R1—SOmnR—SOp—R2.Type: GrantFiled: March 26, 2002Date of Patent: January 9, 2007Assignee: Ciba Specialty Chemicals CorporationInventors: Hans-Rudolf Meier, Gerrit Knobloch, Pierre Rota-Graziosi, Samuel Evans, Paul Dubs, Michèle Gerster
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Patent number: 7041745Abstract: A vulcanizable rubber composition is provided that comprises an elastomer, a reinforcing filler comprising silica or a mixture thereof with carbon black, a silica dispersing aid comprising about 0.1 to about 15 phr poly(vinyl acetate) (PVA), and a cure agent. The addition of PVA to the composition improves the processability of the compound, improves the tear strength and modulus of the rubber and can reduce the number of mixing stages during compounding, resulting in lowering of the cost of operation and increasing plant productivity without compromising the processability or other physical properties of the stocks. Also provided are a vulcanizate formed from vulcanizing the rubber composition, a tire component formed from the vulcanized rubber and a process for forming the tire component.Type: GrantFiled: April 17, 2002Date of Patent: May 9, 2006Assignee: Bridgestone CorporationInventors: Chen-Chy Lin, William L. Hergenrother
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Patent number: 6969737Abstract: A rubber composition including a natural or synthetic rubber, and an adhesive resin capable of unexpected adhesion to metal, polymer and glass substrates, particularly cords in radical tires, hoses, conveyor belts, transmission belts, and the like by the addition of long chain esters, including mono, di- and tri-esters.Type: GrantFiled: May 9, 2003Date of Patent: November 29, 2005Assignee: The C.P. Hall CompanyInventors: Gary Wentworth, Stephen O'Rourke, Kimberly L. Stefanisin, John English
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Patent number: 6943219Abstract: The present invention provides a vinyl polymer with an epoxy group terminally introduced therein and an epoxy resin composition comprising (A) an epoxy resin and (B) a vinyl polymer which has a main chain produced by living radical polymerization and has a reactive functional group at a main chain terminus. A flexible epoxy resin composition can be obtained using these compounds. The invention further provides an epoxy resin composition having an epoxy group at a main chain terminus thereof.Type: GrantFiled: February 24, 2003Date of Patent: September 13, 2005Assignee: Kaneka CorporationInventors: Kenichi Kitano, Yoshiki Nakagawa, Masayuki Fujita
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Patent number: 6884832Abstract: A rubber composition including a natural or synthetic rubber, and an adhesive resin capable of unexpected adhesion to metal, polymer and glass substrates, particularly cords in radical tires, hoses, conveyor belts, transmission belts, and the like by the addition of long chain esters, including mono, di- and tri-esters.Type: GrantFiled: May 10, 2002Date of Patent: April 26, 2005Assignee: The C.P. Hall CompanyInventors: Gary Wentworth, Stephen O'Rourke, Kimberly Stefanisin, John English
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Publication number: 20040258937Abstract: The invention relates to an adhesive based on highly saturated, carboxylated nitrile-butadiene rubber (HXNBR), to its use, to processes for its preparation, to its use for the bonding of substrates and to products manufactured therewith.Type: ApplicationFiled: June 14, 2004Publication date: December 23, 2004Inventors: Dirk Achten, Martin Hoch, Martin Mezger, Rudiger Musch, Hans-Rafael Winkelbach, Roland Parg
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Patent number: 6812277Abstract: Pneumatic rubber tire having at least one component or a rubber composition comprised of a major portion of relatively low Tg high cis 1,4-polybutadiene elastomer (BR) and a minor portion of a relatively high Tg, styrene-rich, styrene/isoprene elastomer (SIR) wherein the Tg of said BR is at least 60° C. lower than the Tg of said SIR. Said SIR has a styrene content of at least 30 weight percent. The styrene based units of said SIR are present substantially without large blocks of styrene units. Said BR is a high cis 1,4-polybutadiene having a cis 1,4-content of at least 96 percent and preferably has a branched macrostructure. In one aspect of the invention, said tire component is a tire tread, particularly a circumferential tire tread.Type: GrantFiled: October 31, 2001Date of Patent: November 2, 2004Assignee: The Goodyear Tire & Rubber CompanyInventors: David John Zanzig, Adel Farhan Halasa, Chad Aaron Jasiunas
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Patent number: 6806307Abstract: The invention provides chain-coupled polymeric sulfide compounds for use as the elastomeric component in vulcanizable elastomeric compositions comprising silica, carbon black or mixtures thereof. In particular, the invention provides anionically polymerized polymers having polymer chain living ends that are functionalized with sulfide groups and coupled together by a metal or nonmetal atom. The chain-coupled polymeric sulfide compounds have an initial high viscosity for ease of handling prior to compounding, a stable viscosity during storage, and a decreased compound viscosity for better filler dispersion and improved mixing efficiency. The invention further provides a pneumatic tire having at least one component produced from the vulcanizable elastomeric composition of the invention. A tire tread produced from vulcanized elastomers exhibiting these improved properties will exhibit reduced hysteresis resulting in an increase in rebound and improved rolling resistance and wet traction.Type: GrantFiled: October 11, 2001Date of Patent: October 19, 2004Assignee: Bridgestone CorporationInventors: Terrence E. Hogan, William L. Hergenrother
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Patent number: 6664319Abstract: A golf ball is provided that includes a molded resilient inner core made of a rubber compound and a polymeric cover surrounding the inner core. The rubber compound is a halo-butyl rubber polymer and a carbon black filler in an amount of 80% to 100% by weight of the total rubber component.Type: GrantFiled: September 26, 2001Date of Patent: December 16, 2003Assignee: Waggle Pty LTDInventors: Virendra Kumar Bahl, Steven Joseph Fisher
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Patent number: 6610753Abstract: The present invention relates to a process for preparing selective ion exchangers based on crosslinked vinylaromatic polymers and containing iminoacetic acid units of the general formulas (I) and (II) wherein X represents hydrogen or an alkali metal ion, by reacting a weak-base anion exchanger bearing primary amino groups with monochloro-acetic acid and/or an alkali metal salt of monochloroacetic acid at a temperature of from 70 to 110° C. and a pH of from 7 to 11.Type: GrantFiled: August 10, 1999Date of Patent: August 26, 2003Assignee: Bayer AktiengesellschaftInventors: Holger Lütjens, Klaus Rall, Axel Ingendoh, Reinhold Klipper
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Patent number: 6590017Abstract: The invention provides an amide compound as a processing aid to improve the dispersion of silica reinforcing filler in a rubber composition, while reducing or eliminating the use of expensive bifunctional silica coupling agents. The invention further provides a vulcanizable elastomeric composition and vulcanized elastomeric products, especially pneumatic tires that exhibit decreased rolling resistance, hysteresis, and improved snow, ice, and wet traction.Type: GrantFiled: May 15, 2000Date of Patent: July 8, 2003Assignee: Bridgestone CorporationInventors: William L. Hergenrother, Chenchy Jeffrey Lin
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Patent number: 6579950Abstract: A rubber waste disposal apparatus processing rubber waste such as an old tire efficiently includes a casing, a rubber waste deformation unit provided in the casing to subject rubber waste to deformation, and an ozone-containing gas supply unit supplying ozone-containing gas into the casing. The rubber waste deformation unit includes a pair of cylindrical rollers having a plurality of protrusions projecting outwards, capable of sandwiching rubber waste at the gap therebetween, and a distance setting unit that can set the distance of the gap between the cylindrical rollers.Type: GrantFiled: September 27, 2001Date of Patent: June 17, 2003Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kazuyuki Nishioka, Kiyoshige Muraoka, Jun Nishibayashi
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Publication number: 20020193454Abstract: The present invention relates to a process for preparing selective ion exchangers based on crosslinked vinylaromatic polymers and containing iminoacetic acid units of the general formulas (I) and (II) 1Type: ApplicationFiled: August 10, 1999Publication date: December 19, 2002Inventors: HOLGER LUTJENS, KLAUS RALL, AXEL INGENDOH, REINHOLD KLIPPER
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Publication number: 20020188082Abstract: A novel vulcanizing agent giving a vulcanized rubber superior in heat aging resistance and reversion resistance, comprising an organic sulfur vulcanizing agent obtained by reaction of sulfur and norbornene or its derivative or dicyclopentadiene in the presence of catalyzing amounts of a vulcanization accelerator and an accelerator activator.Type: ApplicationFiled: March 5, 2001Publication date: December 12, 2002Applicant: THE YOKOHAMA RUBBER CO, LTD.Inventors: Yuko Nakata, Kazunori Ishikawa
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Patent number: 6420489Abstract: An improved process is provided for the bromination of isoolefin-conjugated diolefin polymers by brominating said polymer in solution in selected halogen-containing hydrocarbons as solvent. There is also provided an improved product of said process wherein the brominated polymer contains not less than 80 percent of the bound bromine atoms in a form suitable to participate in the vulcanization of the polymer and wherein not less than 70 percent of the bound conjugated diolefin units are similarly so brominated.Type: GrantFiled: February 28, 2001Date of Patent: July 16, 2002Assignee: Bayer AktiengesellschaftInventors: Gabor Kaszas, Wolfgang Baade, Heinrich Konigshofen
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Patent number: 6417285Abstract: The present invention provides a method for the production of a copolymer based on vinyl aromatic compounds and conjugated dienes, in which after polymerization, the copolymers are treated with multi-functional sulfur halides in the presence of a catalyst at temperatures in the range from 20 to 130° C. The copolymers produced according to the present invention demonstrate clearly improved processing characteristics as a result of selective masticating effect and good mechanical properties.Type: GrantFiled: January 18, 2001Date of Patent: July 9, 2002Assignee: Bayer AktiengesellschaftInventors: Ellen Giebeler, Heinz-Dieter Brandt, Rüdiger Engehausen, Günter Marwede
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Patent number: 6348545Abstract: A water-absorbing resin having superior water absorption properties, and a method for manufacturing the water-absorbing resin having superior water absorption properties in a short time, in which used waste materials are used for effective utilization of resources. To this end, a high-molecular material containing acrylonitrile, styrene and conjugated dienes as constituent units are processed with acid and/or alkali.Type: GrantFiled: January 11, 1999Date of Patent: February 19, 2002Assignee: Sony CorporationInventors: Yasuhito Inagaki, Haruo Watanabe, Tsutomu Noguchi
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Publication number: 20010014720Abstract: The present invention provides a method for the production of a copolymer based on vinyl aromatic compounds and conjugated dienes, in which after polymerization, the copolymers are treated with multi-functional sulfur halides in the presence of a catalyst at temperatures in the range from 20 to 130° C.Type: ApplicationFiled: January 18, 2001Publication date: August 16, 2001Inventors: Ellen Giebeler, Heinz-Dieter Brandt, Rudiger Engehausen, Gunter Marwede