Sulfur Containing Chemical Treating Agent Patents (Class 525/332.6)
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Patent number: 6630535Abstract: A composition comprising an elastomer, a filler, and a comb-like polymer, the comb-like polymer comprising a backbone and a plurality of side chains, the backbone having a length greater than or equal to the entanglement length, the side chains having a length greater than about 33% of the entanglement length, the backbone including at least one side chain per entanglement length, and the comb-like polymer having a Tg of less than −5° C.Type: GrantFiled: August 18, 2000Date of Patent: October 7, 2003Assignee: Bridgestone CorporationInventors: Terrence E. Hogan, James A. Krom, James E. Hall, Xiaorong Wang, Peyman Pakdel, William L. Hergenrother
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Patent number: 6620875Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.Type: GrantFiled: September 4, 2001Date of Patent: September 16, 2003Assignee: Uniroyal Chemical Company, Inc.Inventors: Sung W. Hong, Martin J. Hannon, Peter K. Greene
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Patent number: 6608145Abstract: Sulfur-vulcanizable elastomeric compounds and pneumatic tire components having improved tensile mechanical and dynamic viscoelastic properties are produced by compounding polymers with silica at a temperature of 165° C. to about 200° C., in the presence of a silica dispersing agent, and a very small amount (e.g., about 0.01% to about 1% by weight, based on the weight of the silica) of a bis(trialkoxysilylorgano) tetrasulfide silica coupling agent.Type: GrantFiled: October 13, 2000Date of Patent: August 19, 2003Assignee: Bridgestone CorporationInventors: Chenchy Jeffrey Lin, William L. Hergenrother, Ashley S. Hilton
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Patent number: 6605670Abstract: Methods of making low molecular weight methylene acceptors are provided. The methylene acceptors are prepared by reacting a polyhydric phenol with an aromatic olefinic compound in the presence of an acid catalyst, and then further reacting the products of the first reaction with an N-methylol lactam derivative. Derivatives made by the above method, as well as rubber compositions using these derivatives are also provided.Type: GrantFiled: November 6, 2001Date of Patent: August 12, 2003Assignee: Indspec Chemical CorporationInventors: Raj B. Durairaj, Mark A. Lawrence
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Patent number: 6593433Abstract: The present invention relates to siloxy containing salts of the formula: wherein each R1 and R2 are independently selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms and alkyls having from 1 to 8 carbon atoms; R3 is selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms; each R4 is independently selected from the group consisting of alkylenes and having from 1 to 15 carbon atoms, arylenes alkyl substituted arylenes having from 6 to 10 carbon atoms, —R5—O—R6— and —R5—NH—R7—; R5 and R7 are independently selected from the group consisting of alkylenes having from 1 to 15 carbon atoms, arylenes and alkyl substituted arylenes having from 6 to 10 carbon atoms; R6 is selected from the group consisting of alkylenes having from 1 to 15 carbon atoms, arylenes and alkyl substituted arylenes having from 6 to 10 carbon atoms and alkenylenes having from 2 to 15 carbon atoms; and x is an integerType: GrantFiled: February 27, 2001Date of Patent: July 15, 2003Assignee: The Goodyear Tire & Rubber CompanyInventor: Giorgio Agostini
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Patent number: 6590042Abstract: A process for reclaiming sulfur-cured, vulcanized rubber by combining finely ground scrap vulcanized rubber within a specialized, twin-screw extruder capable of providing strong shearing and just-on-time mixing; adding a reclaiming agent to the extruder; and masticating the rubber scrap and reclaiming agent within the extruder until the rubber scrap is devulcanized. The present invention also discloses a unique composition of reclaiming agent, which preferably includes the following compounds: accelerators TBBS, ZMBT, MBT, and TMTM; activators zinc oxide and stearic acid; and zinc salts of fatty acids and sulfur. The reclaimed rubber is suitable for use in producing high-grade, rubber products without adding a binder, or for combining with fresh rubber compounds to produce high-specification rubber products.Type: GrantFiled: October 3, 2001Date of Patent: July 8, 2003Inventor: Ying Tang
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Publication number: 20030119995Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.Type: ApplicationFiled: September 4, 2001Publication date: June 26, 2003Inventors: Sung W. Hong, Martin J. Hannon, Peter K. Greene
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Publication number: 20030114601Abstract: A composition is disclosed that comprises a blend of:Type: ApplicationFiled: September 19, 2001Publication date: June 19, 2003Inventors: Richard W. Cruse, Frederick D. Osterholtz
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Publication number: 20030114602Abstract: A golf ball comprising a center comprising a polybutadiene having a molecular weight of greater than 200,000 and a resilience index of at least about 40; and a cover layer comprising a polyurethane composition formed from a prepolymer having no greater than 7.5 percent by weight unreacted isocyanate groups.Type: ApplicationFiled: September 11, 2002Publication date: June 19, 2003Inventors: Shenshen Wu, Edmund A. Hebert, Laurent Bissonnette, David A. Bulpett, Murali Rajagopalan, Peter Voorheis, Mark N. Wrigley
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Publication number: 20030105242Abstract: The present invention is directed to a rubber composition that is useful for the manufacture of tires, where the composition is based on a diene elastomer, a reinforcing inorganic filler, and a coupling system. The coupling system comprises a polysulfurized alkoxysilane (“PSAS”) coupling agent (inorganic filler/diene elastomer) associated with an aldimine having the general formula R—CH═N—R and a guanidine derivative. The present invention is further directed to tires and semi-finished products for tires comprising a rubber composition according to the invention. The invention is also directed to a coupling system (inorganic filler/diene elastomer) for a rubber composition based on a diene elastomer reinforced by an inorganic filler, where the coupling system comprises a polysulfurized alkoxysilane (PSAS) coupling agent in association with an aldimine having the general formula R—CH═N—R and a guanidine derivative.Type: ApplicationFiled: July 23, 2002Publication date: June 5, 2003Inventor: Christophe Penot
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Publication number: 20030096915Abstract: A golf ball comprising a center comprising a polybutadiene having a molecular weight of greater than 200,000 and a resilience index of at least about 40; and a cover layer comprising a polyurethane composition formed from a prepolymer having no greater than 7.5 percent by weight unreacted isocyanate groups.Type: ApplicationFiled: September 27, 2002Publication date: May 22, 2003Inventors: Shenshen Wu, Edmund A. Hebert, Laurent Bissonnette, David A. Bulpett, Murali Rajagopalan, Peter Voorheis, Mark N. Wrigley
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Publication number: 20030065104Abstract: The present invention is directed to a rubber composition comprising a diene elastomer, a reinforcing white filler, and a (white filler/elastomer) coupling agent, which is bifunctional and which can be bonded to the elastomer by means of a function X.Type: ApplicationFiled: June 28, 2002Publication date: April 3, 2003Inventors: Salvatore Pagano, Christel Thonier, Gerard Mignani
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Patent number: 6541574Abstract: A core is enveloped by a cover with trans 1,4-polyisoprene as the main component, including a super accelerator formed of dithiocarbamate and/or xanthate, and vulcanized at a temperature lower than the melting point of trans 1,4-polyisoprene to provide a golf ball having high impact resilience and spinning performance. Also, a core is enveloped by an inner layer cover having trans 1,4-polyisoprene as the main component, including a super accelerator formed of dithiocarbamate and/or xanthate, and the inner layer cover is surrounded by an outer layer cover with trans 1,4-polyisoprene as the main component, including a super accelerator of an amount larger than that in the inner layer cover to provide a golf ball having high impact resilience and spinning performance, and whose cover material is sufficiently anchored.Type: GrantFiled: May 19, 2000Date of Patent: April 1, 2003Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kohei Takemura, Kazuhisa Fushihara, Seigou Sakagami, Kaname Yamada
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Patent number: 6525118Abstract: A silica-filled, vulcanized elastomeric compound comprises 100 parts by weight of an elastomer; from about 5 to about 100 parts by weight of a reinforcing filler per 100 parts of elastomer, wherein the reinforcing fillers are selected from the group consisting of carbon black and silica filler; from 0 to about 20 percent by weight of a silane, based upon the weight of the silica filler; a cure agent; from about 0 to about 20 parts by weight of a processing aid selected from the group consisting of fatty acid esters of hydrogenated and non-hydrogenated C5 and C6 sugars; from about 0 to about 20 parts by weight of a processing aid selected from the group consisting of polyoxyethylene derivatives of fatty acid esters of hydrogenated and non-hydrogenated C5 and C6 sugars; from about 0 to about 40 parts by weight of an additional filler other than silica or carbon black, with the provisos that at least one of the processing aids or additional fillers are present; that if the processing aid is sorbitan monooleate,Type: GrantFiled: December 5, 1997Date of Patent: February 25, 2003Assignee: Bridgestone CorporationInventors: William L. Hergenrother, William M. Cole, James Oziomek
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Patent number: 6518367Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I): —(SxR1)n— (I) wherein R1 represents an organic group, x is a number of 3 to 5 on average, and n is an integer of 1 to 100, or a specific sulfur compound (1) and sulfur (2), and optionally a thiazole base, sulfenamide base, thiuram base, and/or diothio acid base vulcanization accelerator (3).Type: GrantFiled: February 15, 2000Date of Patent: February 11, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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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: 6486261Abstract: A golf ball comprising a center comprising a polybutadiene having a molecular weight of greater than 200,000 and a resilience index of at least about 40; and a cover layer comprising a polyurethane composition formed from a prepolymer having no greater than 7.5 percent by weight unreacted isocyanate groups.Type: GrantFiled: November 27, 2000Date of Patent: November 26, 2002Assignee: Acushnet CompanyInventors: Shenshen Wu, Edmund A. Hebert, Laurent Bissonnette, David A. Bulpett, Murali Rajagopalan, Peter Voorheis, Mark N. Wrigley
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Patent number: 6476154Abstract: A rubber composition is provided comprising a diene-based elastomer, a vulcanizing agent, a vulcanizing accelerator and a reinforcement comprising a conical carbon. The conical carbon comprises cones, flat plates, nanotubes and fullerenes. Also provided is a tire having at least one component fabricated from the rubber composition.Type: GrantFiled: September 28, 2000Date of Patent: November 5, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Neil Arthur Maly, Jerry Donald Hunt, Dennis Keith Romain
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Publication number: 20020156201Abstract: The present invention relates to titanium and zirconium compounds of the formulaeType: ApplicationFiled: June 17, 2002Publication date: October 24, 2002Applicant: The Goodyear Tire & Rubber CompanyInventors: Giorgio Agostini, Mario Corigliano, Uwe Ernst Frank
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Patent number: 6465581Abstract: This invention relates to use of stabilized unsymmetrical coupling agents for use in conjugated diene-based rubber compositions reinforced with silica-based reinforcement, namely use of stabilized 2-benzothiazyl-3-(triethoxysilylpropyl) disulfide and 3-(triethoxysilyl)propyl-N-maleamic acid. Said stabilized unsymmetrical coupling agent materials may be provided for mixing with said diene-based rubber(s), for example, as individual materials, as at least one of said materials being pre-reacted with aggregates of precipitated silica, said precipitated silica having hydroxyl groups (e.g. silanol groups) on its surface. The invention includes an article of manufacture, including a tire, having at least one component comprised of such rubber composition.Type: GrantFiled: January 24, 2001Date of Patent: October 15, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Lawson Gibson Wideman, Paul Harry Sandstrom, Theodore Lamson Folk
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Patent number: 6458895Abstract: A low compression, resilient golf ball having a center and a cover, made from a polybutadiene reaction product having polybutadiene, a cis-to-trans catalyst including a Group VIA element, such as at least one of sulfur, polymeric sulfur, selenium, or tellurium, and a free radical source. The reaction product typically has a first dynamic stiffness measured at −50° C. that is less than about 130 percent of a second dynamic stiffness measured at 0° C. A multi-layer golf ball having a center, at least one intermediate layer disposed concentrically about the center, and a cover. At least a portion of at least one of the center, intermediate layer, or both, are made from a reaction product including polybutadiene having a cis-to-trans catalyst that includes at least one elemental sulfur, polymeric sulfur, selenium, or tellurium component and a free radical source.Type: GrantFiled: December 16, 1999Date of Patent: October 1, 2002Assignee: Acushnet CompanyInventors: Mark N. Wrigley, David A. Bulpett, Jeffrey L. Dalton, Derek Ladd, Steven M. Gosetti, Murali Rajagopalan, Laurent C. Bissonnette
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Patent number: 6458871Abstract: The invention relates to the preparation of a rubber composition containing starch/plasticizer composite reinforcement, together with at least one additional reinforcing filler, through the utilization of a combination of an organosilane disulfide compound mixed with a rubber composition in a preparatory, non-productive, mixing stage(s) followed by adding an organosilane polysulfide compound in a subsequent, productive, mixing stage. The invention further relates to the resulting rubber composition and use thereof in rubber products, including tires.Type: GrantFiled: May 8, 2001Date of Patent: October 1, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Thierry Florent Edmé Materne, Filomeno Gennaro Corvasce
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Patent number: 6441098Abstract: An insert for a golf club, and method of forming said insert, comprising a material formed from the conversion reaction of an amount of polybutadiene, a free radical source, and a cis-to-trans catalyst, which reaction occurs at a sufficient temperature to form a polybutadiene reaction product which comprises an amount of trans-polybutadiene greater than the amount of trans-polybutadiene present before the conversion reaction. Further, a golf club having a toe and an opposite heel, a sole portion, and an opposite top portion, a forwardly facing exposed strike face and an opposite rearwardly facing exposed back face portion, comprising a recess defined in the strike face, the recess having a bottom surface spaced from the back face portion and a side wall surface extending between the bottom surface and the strike face for disposing the insert.Type: GrantFiled: May 16, 2001Date of Patent: August 27, 2002Assignee: Acushnet CompanyInventors: Roman D. Halko, Derek A. Ladd
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Patent number: 6423781Abstract: The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with an initiator and a coordinator; effecting polymerization conditions; terminating polymerization with a terminator containing an organo-tin group to form a tin-coupled diene elastomer; compounding the tin-coupled diene elastomer with an amorphous silica filler and a vulcanization agent; and, effecting vulcanization. A pneumatic tire tread stock incorporating the vulcanized elastomer compound exhibits decreased rolling resistance in the tire.Type: GrantFiled: November 28, 2000Date of Patent: July 23, 2002Assignee: Bridgestone CorporationInventors: James Oziomek, William L. Hergenrother
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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: 6417286Abstract: The present invention relates to titanium and zirconium compounds of the formulae (R1—O&Parenclosest;yX&Parenopenst;O—R2—W)z I wherein each R1 is independently selected from the group consisting of alkyl radicals having from 1 to 8 carbon atoms; R2 is a divalent radical selected from the group consisting of alkylenes having 1 to 15 carbon atoms, arylene and alkyl substituted arylene groups having 6 to 10 carbon atoms; W is an epoxy group; and y is an integer of from 1 to 3, z is an integer of from 1 to 3 and the sum of y and z equals 4; and X is titanium or zirconium.Type: GrantFiled: July 25, 2000Date of Patent: July 9, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Giorgio Agostini, Mario Corigliano, Uwe Ernst Frank
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Patent number: 6403686Abstract: Improved compositions of the present invention are made from a rubber latex component (A) and an oil carrier component (B) having hygroscopic and vulcanizing agents. Upon intermixing of the components A and B, an elastomeric composition is formed that can undergo a rheological transformation from a flowable liquid to a solidified elastomeric solid. An improved linear slope between fluidity and temperature is achieved by using naphthenic oil in the oil carrier component (B) with an organic rheology modifier, such as a modified castor oil and/or a polyamide. Further exemplary compositions comprise an inorganic rheology modifier such as an activated clay.Type: GrantFiled: April 11, 2000Date of Patent: June 11, 2002Assignee: W.R. Grace & Co. - Conn.Inventors: Matthew T. Pickett, Jay S. Kellett, Jianye Wen, David S. Hart
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Patent number: 6372857Abstract: The invention relates to rubber mixtures of at least one rubber containing double bonds, at least one rubber gel and at least one masked bismercaptan, and to vulcanization products and rubber shaped articles produced therefrom. The vulcanization products produced from the rubber mixtures according to the present invention show an improvement in the modulus level, a reduction in the DIN abrasion and a reduction in the heat build-up under dynamic stress.Type: GrantFiled: September 1, 2000Date of Patent: April 16, 2002Assignee: Bayer AktiengesellschaftInventors: Werner Obrecht, Winfried Jeske
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Patent number: 6369138Abstract: A processable rubber stock is produced by the preparation of a silica-filled, vulcanized elastomeric compound comprising mixing an elastomer with an amorphous silica filler, a processing aid comprising fatty acid ester of a polyol, optionally an additional mineral filler, and a cure agent. The elastomer is preferably a diene monomer homopolymer or a copolymer of at least one diene and at least one monovinyl aromatic monomer. By effecting vulcanization, a vulcanized elastomeric compound is produced containing good physical properties for use as tread stock for a pneumatic tire.Type: GrantFiled: July 11, 1997Date of Patent: April 9, 2002Assignee: Bridgestone CorporationInventors: William L. Hergenrother, William M. Cole
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Publication number: 20020010283Abstract: The present invention is a rubber composition comprising 0.Type: ApplicationFiled: January 13, 1998Publication date: January 24, 2002Inventor: MASAHIRO HOJO
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Publication number: 20020002224Abstract: A silica-filled, vulcanized elastomeric compound comprises 100 parts by weight of an elastomer; from about 5 to about 100 parts by weight of a reinforcing filler per 100 parts of elastomer, wherein the reinforcing fillers are selected from the group consisting of carbon black and silica filler; from 0 to about 20 percent by weight of a silane, based upon the weight of the silica filler; a cure agent; from about 0 to about 20 parts by weight of a processing aid selected from the group consisting of fatty acid esters of hydrogenated and non-hydrogenated C5 and C6 sugars; from about 0 to about 20 parts by weight of a processing aid selected from the group consisting of polyoxyethylene derivatives of fatty acid esters of hydrogenated and non-hydrogenated C5 and C6 sugars; from about 0 to about 40 parts by weight of an additional filler other than silica or carbon black, with the provisos that at least one of the processing aids or additional fillers are present; that if the processing aid is sorbitan monooleate,Type: ApplicationFiled: December 5, 1997Publication date: January 3, 2002Inventors: WILLIAM L HERGENROTHER, WILLIAM M COLE, JAMES OZIOMEK
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Patent number: 6334476Abstract: A pneumatic tire comprising a tread, wherein the rubber composition of the tread layer comprises 50 parts by weight or more of SBR in 100 parts by weight of the rubber component and, in an amount of 0.2 to 5.0 parts by weight per 100 parts by weight of the rubber component, a vulcanization accelerator represented by the following general formula (I): wherein R1 and R2 each independently represents an alkyl group having 1 to 10 carbon atoms which may be linear, branched, or cyclic or an aryl group having 6 to 10 carbon atoms. The pneumatic tire shows excellent controllability at high speed.Type: GrantFiled: September 5, 1997Date of Patent: January 1, 2002Assignee: Bridgestone CorporationInventors: Nobuyuki Okamura, Masahiro Hojo
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Publication number: 20010044503Abstract: One-component, heat-curing reactive compositions based on liquid rubbers containing reactive olefinic double bonds and optionally solid rubbers and vulcanization systems based on sulfur have high maxima of the acoustic loss factor over a broad in-use temperature range of around +10° C. to +40° C. in their vulcanized state. These compositions optionally contain fine-particle thermoplastic polymers as an additional component. The compositions are suitable for use as acoustically damping adhesives, sealing compounds or coating compositions.Type: ApplicationFiled: January 26, 2001Publication date: November 22, 2001Inventors: Peter Born, Hubert Schenkel
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Patent number: 6319993Abstract: The invention relates to polymeric sulfur compounds, their preparation and their use as vulcanizing agcnts for unsaturated rubber mixtures.Type: GrantFiled: January 19, 2001Date of Patent: November 20, 2001Assignee: Bayer AktiengesellschaftInventors: Hermann-Josef Weidenhaupt, Hartmuth Buding, Josef Hahn, Marco Runk
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Patent number: 6313206Abstract: The present invention relates to titanate compounds of the formula wherein R is selected from the group consisting of alkylene groups having from 1 to 15 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms and x is an integer of from 2 to 8.Type: GrantFiled: October 1, 1999Date of Patent: November 6, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Edward John Blok, Lawson Gibson Wideman, Paul Harry Sandstrom, Mark Leslie Kralevich, Jr.
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Publication number: 20010031836Abstract: The invention relates to a vulcanizable rubber composition comprising a rubber, sulfur or a sulfur donor, a vulcanization accelerator, a protective agent and 0.1 phr or more of an N,N′-disubstituted p-phenylenediamine protective agent is present in the form of a salt with an acid, and the composition does not comprise an elastomeric copolymer having glycidyl groups. The invention also relates to a vulcanization process comprising mixing and heating said rubber composition and to an article of manufacture comprising the rubber vulcanizate obtained by said process. Preferably, the acid is a C1-C24 monocarboxylic acid or a C2-C24 dicarboxylic acid, more preferably a C12-C20 fatty acid such as stearic acid. Most preferably, the protective agent is 6PPD.Type: ApplicationFiled: March 14, 2001Publication date: October 18, 2001Inventors: Rabindrah Nath Datta, Auke Gerardus Talma
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Patent number: 6300421Abstract: The invention relates to preparation of EPDM-based and EPR-based rubber compositions which are vulcanized with peroxide together with a specified combination of sulfur and acrylate co-agents. The invention further relates to articles having at least one component thereof.Type: GrantFiled: March 4, 1999Date of Patent: October 9, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Edward John Blok, Mark Leslie Kralevich, Jr., Paul Harry Sandstrom, Larry Ashley Gordon, James Edward Taucher
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Patent number: 6300392Abstract: The present invention relates to the coagglomeration of random vinyl substituted aromatic/C4-C6 conjugated diolefin polymers with sulfur. Said coagglomerate is storage stable and easily blended with asphalt under a variety of mixing conditions. Further, polymer/asphalt blends prepared with the sulfur coagglomerated polymers show improved storage stability against phase separation.Type: GrantFiled: June 14, 2000Date of Patent: October 9, 2001Assignee: BASF CorporationInventors: Koichi Takamura, Paul Velasco, Peter Blanpain, John Cheng, Heinz Plaumann, Richard W Liu, Wayne Millican, Barry Baughman
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Patent number: 6297327Abstract: The specification discloses a method for vulcanizing an elastomer using as the cure promoter the monomeric distillate by-product from the clay-based dimerization of an unsaturated fatty acid mixture, preferably a tall oil fatty acid mixture. The distillate provides a cost-effective alternative to conventional fatty acid promoters.Type: GrantFiled: December 2, 1998Date of Patent: October 2, 2001Assignee: Arizona Chemical CompanyInventors: Claude Frank Phillips, Jr., Alexander J. Conte
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Patent number: 6291595Abstract: A method is disclosed for increasing the rate of vulcanization of a halogenated isobutylene sulfur rubber composition comprising heating said halogenated isobutylene rubber composition to a temperature ranging from 100° C. to 200° C., wherein said halogenated isobutylene rubber composition contains from 0.05 to 10 phr of sodium thiosulfate pentahydrate.Type: GrantFiled: July 9, 1999Date of Patent: September 18, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Richard Michael D'Sidocky, Bernard Matthew Bezilla, Jr., Leighton Randolph Spadone, David Michael Smith, Sr., Mark Andrew Marinko
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Patent number: 6281295Abstract: Vulcanization accelerators consisting of compounds belonging to the group of enamines having general formula (I):Type: GrantFiled: October 30, 1997Date of Patent: August 28, 2001Assignee: Great Lakes Chemical Italia S.r.l.Inventors: Fabio Broussard, Mauro Adovasio, José Roncalli, Gianbattista Taroni, Corrado Callierotti
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Patent number: 6273163Abstract: The invention relates to the preparation of a rubber composition containing starch/plasticizer composite reinforcement, together with at least one additional reinforcing filler, through the utilization of a combination of an organosilane disulfide compound mixed with a rubber composition in a preparatory, non-productive, mixing stage(s) followed by adding an organosilane polysulfide compound in a subsequent, productive, mixing stage. The invention further relates to the resulting rubber composition and use thereof in rubber products, including tires.Type: GrantFiled: October 22, 1998Date of Patent: August 14, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Thierry Florent Edmé Materne, Filomeno Gennaro Corvasce
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Patent number: 6252007Abstract: The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with an initiator and a coordinator; effecting polymerization conditions; terminating polymerization with a terminator containing an organo-tin group to form a tin-coupled diene elastomer; compounding the tin-coupled diene elastomer with an amorphous silica filler and a vulcanization agent; and, effecting vulcanization. A pneumatic tire tread stock incorporating the vulcanized elastomer compound exhibits decreased rolling resistance in the tire.Type: GrantFiled: July 11, 1997Date of Patent: June 26, 2001Assignee: Bridgestone CorporationInventors: James Oziomek, William L. Hergenrother
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Patent number: 6252008Abstract: The invention relates to rubber blends containing said at least one solution-polymerized rubber containing hydroxyl groups, synthesized from diolefins and vinylaromatic monomers, wherein said at least one solution-polymerized rubber containing hydroxyl groups contain in the region of 0.1 to 5wt.% of bonded hydroxyl groups, to a process for their preparation and to their use for the production of all kinds of moldings.Type: GrantFiled: July 8, 1999Date of Patent: June 26, 2001Assignee: Bayer AktiengesellschaftInventors: Thomas Scholl, Ulrich Eisele, Jürgen Trimbach, Stefan Kelbch
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Patent number: 6251994Abstract: A vulcanizate that has improved damping properties where the vulcanizate is prepared by the steps comprising blending a saturated damping additive within a vulcanizable composition of matter, wherein the vulcanizable composition of matter includes a vulcanizable elastomer, and effecting vulcanization of the elastomer.Type: GrantFiled: February 18, 1999Date of Patent: June 26, 2001Assignee: Bridgestone CorporationInventors: Xiaorong Wang, Victor J. Foltz, Edward D. Kelley
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Patent number: 6245860Abstract: A rubber composition which contains substantially hollow, irregularly-shaped particles, and/or fragments thereof derived from a surface-modified carbon black aggregate from the which the carbon black core has been removed. For example, an irregularly-shaped carbon black aggregate may be surface-modified to have interconnecting domains of at least one inorganic material on its surface and the carbon black core removed by an oxidation process leaving an irregularly-shaped, substantially hollow particle and/or fragments thereof of said inorganic materials. An article having a component of such rubber composition is also provided such as, for example, a tire or an industrial product.Type: GrantFiled: June 16, 1999Date of Patent: June 12, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Thierry Florent Edmé Materne, Christian Kaes, Giorgio Agostini, Uwe Ernst Frank, Friedrich Visel
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Patent number: 6211271Abstract: A process for producing a vulcanizable rubber composition containing silica and carbon black, comprises the step of intimately mixing at a temperature of from 130° to 180° C. at least a first cross-linkable unsaturated chain polymer with a first carbon black-based reinforcing filler, so as to obtain a first rubber composition capable of allowing a subsequent effective dispersion of a second silica-based reinforcing filler and of a second cross-linkable unsaturated chain polymer. The rubber composition thus obtained shows a homogeneous dispersion of the reinforcing fillers, in particular of the silica-based reinforcing filler, constant physical-mechanical characteristics, and improved drawability, and is particularly suitable for the manufacture of tire treads with low rolling resistance.Type: GrantFiled: July 14, 1999Date of Patent: April 3, 2001Assignee: Pirelli Pneumatici S.p.A.Inventors: Luciano Garro, Angela Amaddeo, Roberto Pessina
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Patent number: 6207764Abstract: Rubber compositions in which the rubber is a halogenated butyl elastomer are crosslinkable by virtue of containing a crosslinking agent such as zinc oxide and an accelerator which is a salt of an organic thiosulfate.Type: GrantFiled: April 26, 1995Date of Patent: March 27, 2001Assignee: Monsanto CompanyInventor: Frederick Ignatz-Hoover
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Patent number: 6197868Abstract: A pneumatic tire having a tread layer. A rubber composition of the tread layer includes a specific diene-based rubber component, and either a specific zinc dithiophosphate vulcanization accelerator, or a specific zinc dithiophosphate vulcanization accelerator and a benzothiazole vulcanization accelerator. The zinc dithiophosphate vulcanization accelerator is contained in an amount of 0.2 to 5.0 parts by weight per 100 parts by weight of the rubber component. A molar amount of the benzothiazole vulcanization accelerator is one-half or more of a molar amount of the zinc dithiophosphate vulcanization accelerator. Further, the rubber composition contains a white filler in an amount of 15 parts by weight or more per 100 parts by weight of the rubber component. Produceability of the pneumatic tire is excellent, and a low heat build-up performance thereof is improved without any adverse effects on gripping performance.Type: GrantFiled: November 6, 1998Date of Patent: March 6, 2001Assignee: Bridgestone CorporationInventors: Nobuyuki Okamura, Masahiro Hojo