Butadiene Homopolymer Patents (Class 525/333.2)
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Patent number: 6794428Abstract: A coupler is described for use in carbon black filled rubber compositions. The coupler includes an amine group and a thiol group or a polysulfidic linkage. The coupler improves the interaction of the carbon black with the rubber as measured by a decrease in the tan delta at 60° C. while substantially maintaining the tan delta at 0° C.Type: GrantFiled: October 29, 2002Date of Patent: September 21, 2004Assignee: The Lubrizol CorporationInventors: James D. Burrington, Benny R. Richardson, Joseph W. Pialet, Ann E. Wykoff, Roger L. Sowerby, Kenneth W. Lee, Ralph E. Kornbrekke, Ghebrehiwet N. Ghebremeskel, Kirk E. Davis
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Publication number: 20040176545Abstract: The present invention provides functionalized electrophiles, their analogous initiators, and processes for preparing these compounds. The present invention also relates to homotelechelic, heterotelechelic, and radial functional polydiene polymers, polyarylene polymers and polydiene/polyarylene copolymers, their optionally hydrogenated analogues, their optionally deprotected analogues, and processes for preparing these functionalized polymers.Type: ApplicationFiled: March 16, 2004Publication date: September 9, 2004Inventors: James Anthony Schwindeman, Robert J. Letchford, Eric John Granger, Roderic P. Quirk
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Patent number: 6784256Abstract: A controlled free-radical polymerization process for forming end-functionalized polymers is disclosed, particularly by degenerative iodine transfer. The end-functionalized polymers are characterized by a polydispersity less than 2.5 and a predetermined molecular weight. The end-functionalized polymers are useful as reactive intermediates in condensation polymerization, chain polymerization and heterogeneous polymerization reactions.Type: GrantFiled: August 30, 2000Date of Patent: August 31, 2004Assignee: Noveon IP Holdings Corp.Inventors: Jinsong Lee, Paul Peter Nicholas, Naser Pourahmady, Rutger D. Puts
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Patent number: 6767969Abstract: A hydrogenated polymer obtained by hydrogenating a conjugated diene polymer having an average vinyl bond content of 20% by weight or more and less than 40% by weight to a degree such that 85% or more of double bond residues in the conjugated diene unit portion are hydrogenated, wherein (1) the crystallizing peak temperature and the hydrogenated vinyl bond content satisfy the formula: −2.8V+100<T<−2.8V+130 wherein T is the crystallizing peak temperature (° C.) measured by DSC; and V is the hydrogenated vinyl bond content (%), (2) the molecular weight is 60,000 to 600,000, and (3) the molecular weight distribution is 1.55 to 5.0. The hydrogenated polymer is excellent in mechanical strength, heat resistance, weatherability and processability and, when blended with other thermoplastic resins or rubbery polymers, provides molded articles with well-balanced physical properties such as impact resistance and moldability.Type: GrantFiled: June 24, 2002Date of Patent: July 27, 2004Assignee: Asahi Kasei Kabushiki KaishaInventors: Masahiro Sasagawa, Shigeru Sasaki, Shigeki Takayama, Takashi Sato
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Patent number: 6720391Abstract: The present invention provides functionalized electrophiles, their analogous initiators, and processes for preparing these compounds. The present invention also relates to homotelechelic, heterotelechelic, and radial functional polydiene polymers, polyarylene polymers and polydiene/polyarylene copolymers, their optionally hydrogenated analogues, their optionally deprotected analogues, and processes for preparing these functionalized polymers.Type: GrantFiled: February 1, 2002Date of Patent: April 13, 2004Assignee: FMC CorporationInventors: James Anthony Schwindeman, Robert J. Letchford, Eric John Granger, Roderic P. Quirk
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Patent number: 6713565Abstract: It has been unexpectedly discovered that cis-1,4-polybutadiene that is synthesized utilizing Zeigler-Natta catalyst systems has superior characteristics for utilization in solid golf ball cores if the polymerization is terminated utilizing a carboxylic acid of the structural formula RCOOH, wherein R represents an alkyl group containing from 1 to about 30 carbon atoms.Type: GrantFiled: June 17, 2002Date of Patent: March 30, 2004Assignee: The Goodyear Tire & Rubber CompanyInventors: Craig William Burkhart, Michael Lester Kerns, Kenneth Floyd Castner, Michael Joseph Rachita, Michael Paul Mallamaci
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Patent number: 6673871Abstract: Elastomeric articles, such as gloves and condoms, are disclosed including a process for making the articles. The elastomeric articles produced according to the present invention are made from a synthetic polymer. During production of the articles, the polymer is cross-linked using a metal oxide as a cross-linking agent. In one embodiment, the polymer is cross-linked without using conventional sulfur-containing cross-linking agents or accelerators.Type: GrantFiled: December 21, 2000Date of Patent: January 6, 2004Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Derek Warneke, Jali Williams
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Patent number: 6653430Abstract: A butadiene polymer (i) having a cis bond unit content of at least 50% based on the total butadiene units, a number average molecular weight (Mn) of 1,000 to 10,000,000, and at least 80%, based on the total molecular chains, of living chains containing a transition metal of group IV of the Periodic table at a terminal thereof; a polymer (ii) obtained by modifying terminals of the polymer (i); and a polymer (iii) obtained by coupling the polymers (i). These polymers (i), (ii) and (iii) are obtained by polymerizing a conjugated diene monomer alone or with a copolymerizable monomer at a specific temperature in the presence of a catalyst comprising a compound (A) of a transition metal of group IV of the periodic table having a cyclopentadienyl structure and a co-catalyst (B) selected from organoaluminum-oxy compound (a) and others and optionally further by contacting the resultant polymer with a terminal modifier or a coupling agent.Type: GrantFiled: June 18, 2001Date of Patent: November 25, 2003Assignees: Japan as Represented by Director General of the Agency of Industrial Science and Technology, Japan Chemical Innovation InstituteInventors: Kazuo Soga, Michihiko Asai, Yasuzo Suzuki, Akira Miyazawa, Kenji Tsuchihara, Masahide Murata, Hiroyuki Ozaki, Masanao Kawabe, Yoshifumi Fukui, Jizhy Jin, Hideaki Hagihara, Toshio Kase
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Patent number: 6653409Abstract: A radical-modified polymer having a free radical compound stable in the presence of oxygen at an ordinary temperature at the end of the molecule thereof or in the molecular chain thereof and a polymer composition containing the same.Type: GrantFiled: February 25, 2002Date of Patent: November 25, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Makoto Ashiura, Keisuke Chino, Tetsuji Kawazura
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Patent number: 6653408Abstract: In one embodiment, this invention provides a composition comprising a functionalized block copolymer crosslinked with acetylacetonate. The crosslinked block copolymer has improved solvent resistance and improved cohesive strength at high temperatures. The crosslinked block copolymer comprises preferably an acid functionalized, hydrogenated block copolymer having an ABA or similar structure wherein the block comprises at least 80 wt % of a vinyl-aromatic hydrocarbon, preferably styrene, and wherein the B block comprises at least 80 wt % of a hydrogenated and conjugated diene, preferably butadiene, isoprene or a mixture thereof. In another embodiment, this invention provides an adhesive, sealant, oil gel, asphalt composition, or wax composition comprising the acid functionalized, hydrogenated block copolymer.Type: GrantFiled: November 21, 2002Date of Patent: November 25, 2003Assignee: Kraton Polymers U.S. LLCInventor: David J. St. Clair
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Patent number: 6646059Abstract: A process is provided for the removal of iron- and rhodium-containing residues from a solution of hydrogenated nitrile rubber. The process utilizes an ion-exchange resin having thiourea functional groups. Further, the resin is both macroporour and monodispersed. The process removes both rhodium and iron from viscous rubber solutions. In a preferred embodiment, the process is carried out in an ion-exchange column.Type: GrantFiled: November 2, 2001Date of Patent: November 11, 2003Assignee: Bayer Inc.Inventors: Paul Nguyen, Harald Bender, Gilles Arsenault, Ignazio Spadola, Franz-Josef Mersmann
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Patent number: 6645562Abstract: A method of preparing a curable coating and a method of curing the curable coating are disclosed. The curable composition from which the curable coating is prepared may be applied to the surface of a substrate in neat form or in aqueous medium to produce the coating. Curing of the curable coating may be accomplished by chemical generation of free radicals, by electrochemical generation of free radicals, by electron beam, by photochemical generation of free radicals, or by other electromagnetic irradiation.Type: GrantFiled: June 27, 2002Date of Patent: November 11, 2003Inventors: Gary David Greenblatt, Ward Thomas Brown, Michael Damian Bowe, Richard Foster Merritt, Ronald Scott Beckley, Barry Clifford Lange, Robert Wilczynski, David William Whitman, Martha Harbaugh Wolfersberger
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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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Publication number: 20030153693Abstract: Compositions including one or more anionic polymerization initiators and one or more additives for improving functionalizing efficiency of living polymer anions are disclosed. The present invention also provides compositions including one or more electrophiles and one or more additives for improving functionalizing efficiency of living polymer anions. Novel electrophiles and processes for improving polymer anion functionalization efficiencies are also disclosed.Type: ApplicationFiled: February 7, 2003Publication date: August 14, 2003Inventors: Roderic Paul Quirk, Young Joon Lee, James Anthony Schwindeman, Robert James Letchford
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Patent number: 6596798Abstract: The present invention provides a method of forming a functionalized polymer. The method includes the steps of providing a living lithium polymer and terminating the polymer with an oxazoline compound selected from an organic halide oxazoline and a branched or unbranched vinyl oxazoline compound. The present invention also provides a compounded rubber article wherein carbon black is compounded with a terminated rubber that is the reaction product of a living lithium polymer and such oxazoline compounds.Type: GrantFiled: November 5, 2001Date of Patent: July 22, 2003Assignee: Bridgestone CorporationInventors: Christine M. Rademacher, William L. Hergenrother, Daniel F. Graves, James D. Ulmer
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Publication number: 20030125475Abstract: A hydrogenated polymer obtained by hydrogenating a conjugated diene polymer having an average vinyl bond content of 20% by weight or more and less than 40% by weight to a degree such that 85% or more of double bond residues in the conjugated diene unit portion are hydrogenated, whereinType: ApplicationFiled: June 24, 2002Publication date: July 3, 2003Inventors: Masahiro Sasagawa, Shigeru Sasaki, Shigeki Takayama, Takashi Sato
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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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Patent number: 6583224Abstract: Thermosetting polymers and the electrical laminates made therefrom are disclosed. The polymer comprises the cross-linked product of: a) one or more ethylenically unsaturated aromatic monomers, optionally containing a halogenated monomer to impart fire retardation, and b) a vinyl-terminated polybutadiene or butadiene-styrene copolymer containing either a urethane or an ester group. It has been discovered that an unexpected combination of thermal, electrical, and mechanical properties are obtained from the composition recited herein. The composition is ideally suited as a matrix polymer for electrical substrate applications.Type: GrantFiled: October 30, 2001Date of Patent: June 24, 2003Assignee: GIL TechnologiesInventors: Scott Alan Lane, Donald Clyle Rollen, Timothy Wayne Austill
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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: 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: 20030100684Abstract: Rubbery polymers made by anionic polymerization can be coupled with tin halides or silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer was synthesized utilizing a polar modifier it is difficult to attain a high level of coupling. This invention is based upon the unexpected finding that coupling efficiency can be significantly improved by conducting the coupling reaction in the presence of a lithium salt of a saturated aliphatic alcohol, such as lithium tamylate. This invention discloses a process for coupling a living rubbery polymer that comprises reacting the living rubbery polymer with coupling agent selected from the group consisting of tin halides and silicon halides in the presence of a lithium salt of a saturated aliphatic alcohol. The lithium salt of the saturated aliphatic alcohol can be added immediately prior to the coupling reaction or it can be present throughout the polymerization and coupling process.Type: ApplicationFiled: November 29, 2002Publication date: May 29, 2003Applicant: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Wen-Liang Hsu
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Patent number: 6569952Abstract: The addition of oppositely charged surfactant to fluorescent ionic conjugated polymer forms a polymer-surfactant complex that exhibits at least one improved photophysical property. The conjugated polymer is a fluorescent ionic polymer that typically has at least one ionic side chain or moiety that interacts with the specific surfactant selected. The photophysical property improvements may include increased fluorescence quantum efficiency, wavelength-independent emission and absorption spectra, and more stable fluorescence decay kinetics. The complexation typically occurs in a solution of a polar solvent in which the polymer and surfactant are soluble, but it may also occur in a mixture of solvents. The solution is commonly prepared with a surfactant molecule:monomer repeat unit of polymer ratio ranging from about 1:100 to about 1:1. A polymer-surfactant complex precipitate is formed as the ratio approaches 1:1. This precipitate is recoverable and usable in many forms.Type: GrantFiled: September 5, 2001Date of Patent: May 27, 2003Assignee: The Regents of the University of CaliforniaInventors: Liaohai Chen, Su Xu, Duncan McBranch, David Whitten
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Publication number: 20030096916Abstract: Improved amine-terminated polybutadienes (ATPBs) having one or two terminal groups of the formula —CHRNH2 wherein R is C1-C20 alkyl, are prepared by aminating a secondary hydroxyl-terminated polybutadiene having no ether groups. The ATPBs may be hydrogenated or partially hydrogenated, either prior to or after the amination, to saturate or partially saturate the polymers. Preferred ATPBs are of the formula H2NCHR-(polybutadiene)-CHRNH2 wherein R is C1-C20 alkyl.Type: ApplicationFiled: November 20, 2002Publication date: May 22, 2003Inventors: Herbert Shin-I Chao, John Schmidhauser, Alain Robert Drexler, Nan Tian
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Patent number: 6559240Abstract: Rubbery polymers made by anionic polymerization can be coupled with both tin halides and silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer is synthesized by anionic polymerization utilizing a polar modifier it is difficult to attain a high level of coupling.Type: GrantFiled: November 15, 2001Date of Patent: May 6, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Wen-Liang Hsu, Adel Farhan Halasa
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Patent number: 6547710Abstract: A sulfonated, oxidized rubber composition and a neutralized, sulfonated, oxidized rubber composition are provided. The sulfonated, oxidized rubber composition, preferably a composition containing such sulfonated, oxidized rubber composition, can be used as an additive in or for asphalt. The neutralized, sulfonated, oxidized rubber composition, preferably a composition comprising such neutralized, sulfonated, oxidized rubber composition, can be used for oil field applications such as preventing the loss of fluids used during such oil field applications. A process of preparing such compositions includes contacting a rubber composition, such as butyl rubber in the form of waste tire particles, with an oxidizing agent to provide an oxidized rubber composition. The oxidized rubber composition is then contacted with a sulfur-containing acid to provide a sulfonated, oxidized rubber composition.Type: GrantFiled: November 14, 2000Date of Patent: April 15, 2003Assignee: ConocoPhillips CompanyInventors: Bharat B. Patel, Marshall D. Bishop
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Patent number: 6548599Abstract: There is disclosed a rubber composition comprising: (A) 100 parts by weight of at least one rubber containing olefinic unsaturation; and (B) 1.Type: GrantFiled: February 18, 2002Date of Patent: April 15, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Marc Weydert, Wolfgang Lauer, Friedrich Visel, Rene Jean Zimmer, Francois Kayser
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Publication number: 20030069363Abstract: A method of preparing a curable coating and a method of curing the curable coating are disclosed. The curable composition from which the curable coating is prepared may be applied to the surface of a substrate in neat form or in aqueous medium to produce the coating. Curing of the curable coating may be accomplished by chemical generation of free radicals, by electrochemical generation of free radicals, by electron beam, by photochemical generation of free radicals, or by other electromagnetic irradiation.Type: ApplicationFiled: June 27, 2002Publication date: April 10, 2003Inventors: Gary David Greenblatt, Ward Thomas Brown, Michael Damian Bowe, Richard Foster Merritt, Ronald Scott Beckley, Barry Clifford Lange, Robert Wilczynski, David William Whitman, Martha Harbaugh Wolfersberger
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Patent number: 6545103Abstract: Compositions including one or more anionic polymerization initiators and one or more additives for improving functionalizing efficiency of living polymer anions are disclosed. The present invention also provides compositions including one or more electrophiles and one or more additives for improving functionalizing efficiency of living polymer anions. Novel electrophiles and processes for improving polymer anion functionalization efficiencies are also disclosed.Type: GrantFiled: July 2, 2001Date of Patent: April 8, 2003Assignee: FMC CorporationInventors: Roderic Paul Quirk, Young Joon Lee, James Anthony Schwindeman, Robert James Letchford
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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: 6541575Abstract: According to the present invention, provided is an industrially advantageous process for producing an epoxidized polymer, with safety and efficiency, wherein the epoxidation of a polymer having an olefinic carbon-carbon double bond is effected under the presence of substantially no alkali metal ion by adding an aqueous solution containing (i) ammonium tungstate and/or tungstophosphoric acid and (ii) phosphoric acid, in which the amount of (ii) phosphoric acid is not less than 0.25 moles relative to 1 gram atom of tungsten atom contained in the (i) ammonium tungstate and/or tungstophosphoric acid, and an aqueous hydrogen peroxide, separately to a solution of said polymer and a quaternary ammonium salt in an organic solvent immiscible with water.Type: GrantFiled: December 21, 2001Date of Patent: April 1, 2003Assignee: Kuraray Co., Ltd.Inventors: Taketoshi Okuno, Hideharu Iwasaki, Takuo Tsuruta
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Patent number: 6531523Abstract: A beaded polymeric adsorbent has a core part; a shell part arranged around the core part, with one of the parts having a lipophilic property and another of the parts having a hydrophilic property, and is produced by preparing an organic phase composed of water insoluble monounsaturated and poly unsaturated comonomers; preparing an aqueous phase composed of a mixture of water soluble monounsaturated and polyunsaturated comonomers; forming a dispersion of the organic phase and the aqueous phase in a single vessel; and creating conditions for first polymerizing of one of the phases which forms the core part and thereafter polymerizing the other of the phases which forms the shell part.Type: GrantFiled: October 10, 2000Date of Patent: March 11, 2003Assignee: Renal Tech International, LLCInventors: Vadim Davankov, Maria Tsyurupa, Ludmila Pavlova
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Publication number: 20030045657Abstract: Modified polybutadiene having a high-cis and low-trans structure with a moderate 1,2-structure content and exhibiting improved characteristics such as cold flow properties, which is obtained by modifying starting polybutadiene having a Tcp/ML1+4 ratio (Tcp: 5% toluene solution viscosity at 25° C.ML1+4: Mooney viscosity at 100° C.) of 2.5 or more in the presence of a transition metal catalyst.Type: ApplicationFiled: September 5, 2002Publication date: March 6, 2003Applicant: UBE INDUSTRIES, LTD.Inventors: Michinori Suzuki, Masato Murakami
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Patent number: 6528592Abstract: This invention relates to a conjugated diene-based rubber composition reinforced with particulate silica-based reinforcement together with 2-hydroxyethyl methacrylate (a non-silane coupling agent) or a combination of 2-hydroxyethyl methacrylate and bis(3-trialkoxysilylalkyl) polysulfide having an average of from 2 to 2.6, or from 3.5 to 4, sulfur atoms in its polysulfidic bridge to aid in the reinforcement of the rubber composition with a particulate silica-based material and an article of manufacture, including a tire, having at least one component comprised of such rubber composition.Type: GrantFiled: September 14, 2000Date of Patent: March 4, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Lawson Gibson Wideman, Kevin James Pyle, Richard Robinson Smith, Paul Harry Sandstrom
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Patent number: 6489403Abstract: Rubbery polymers made by anionic polymerization can be coupled with tin halides or silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer was synthesized utilizing a polar modifier it is difficult to attain a high level of coupling. This invention is based upon the unexpected finding that coupling efficiency can be significantly improved by conducting the coupling reaction in the presence of a lithium salt of a saturated aliphatic alcohol, such as lithium t-amylate. This invention discloses a process for coupling a living rubbery polymer that comprises reacting the living rubbery polymer with coupling agent selected from the group consisting of tin halides and silicon halides in the presence of a lithium salt of a saturated aliphatic alcohol.Type: GrantFiled: December 14, 1999Date of Patent: December 3, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Wen-Liang Hsu
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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: 6469106Abstract: There is provided a process for producing a modified diene polymer rubber, which comprises the steps of: (i) polymerizing a conjugated diene compound, or a combination of a conjugated diene compound and an aromatic vinyl compound in a hydrocarbon solvent in the presence of an alkali metal catalyst, thereby obtaining an active conjugated diene polymer having an alkali metal at the end thereof, and (ii) reacting the active conjugated diene polymer having an alkali metal at the end thereof with an amine compound represented by the specific formula (1), thereby obtaining the modified diene polymer rubber.Type: GrantFiled: August 20, 2001Date of Patent: October 22, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Katsunari Inagaki, Seiichi Mabe, Yoshihiro Nakatsuji
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Patent number: 6462141Abstract: The present invention relates to alkoxysilane-substituted diene copolymers, organic and inorganic hybrid complex compositions comprising the same and a process for the preparation of the same. The alkoxysilane-substituted diene copolymers are prepared by reacting a diene copolymer substituted by epoxy or hydroxy groups with a silane compound. Thus prepared alkoxysilane-substituted diene copolymer is characterized by the facts that it is in organic solvents and it is capable of being cured at low temperatures. The present invention also relates to a composition prepared by mixing the said copolymer with inorganic fillers and/or coupling agents. The copolymer of the formula (1) has high reactivity with coupling agents since it possesses reactive silane groups and thus provides the diene polymer composition as having improved compatibility with inorganic fillers.Type: GrantFiled: December 15, 1999Date of Patent: October 8, 2002Assignee: Korea Research Institute of Chemical TechnologyInventors: Eun-Kyoung Kim, Hyung-Suk Cho, Young-Pil Kim
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Patent number: 6462143Abstract: This invention relates to a gel-free process for making functionalized polymers. When multi-alkali metal initiators are used to make these polymers anionically, the process comprises anionically polymerizing at least one monomer with a multi-alkali metal initiator in a hydrocarbon solvent, capping the polymer by adding to the polymer a capping agent that reacts with the ends of the polymer chains such that strongly associating chain ends are formed wherein a strongly associating gel is formed, and, finally, adding a trialkyl aluminum compound to the gel. The important characteristic of the capping agent herein is that it will cap the living polymer and will add a functional group to the polymer chain end which will be strongly associating in the hydrocarbon solvent.Type: GrantFiled: January 20, 1999Date of Patent: October 8, 2002Assignee: KRATON Polymers US LLCInventors: Carl Lesley Willis, Daniel Earl Goodwin, Robert Charles Bening, Dale Lee Handlin, Jr., John David Wilkey
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Patent number: 6441100Abstract: A valve joint of a dispensing valve of a fluid product dispensing device, said joint being intended to come into contact with a fluid product comprising an aerosol propellant of the HFC-134a or HFC-227 type, with or without alcohol, characterised in that said joint comprises a surface subjected to a surface treatment, said surface treatment being adapted to lower the friction coefficient of the joint so as to reduce the risks of the valve blocking and/or to create a barrier on the joint surface so as to reduce the level of extractables from said joint.Type: GrantFiled: November 9, 2001Date of Patent: August 27, 2002Assignee: Valois S.A.Inventor: Patrice Leone
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Patent number: 6433098Abstract: The invention relates to a curable composition and a process of preparing the curable composition. The process comprises (a) forming an oligomer from oligomerization of a mixture of a monomer A having a functional group and a monomer B at a temperature in the range of from 150° C. to 650° C., a pressure in the range of from 3 MPa to 35 MPa and the pressure is high enough to maintain the reaction mixture in a fluid state and a residence time in the range of from 0.1 second to 4 minutes; and (b) reacting a modifier having at least one reactive moiety with the oligomer through a reaction between the reactive moiety of the modifier and the functional group of the monomer A in the oligomer, and the modifier further comprises a curable group.Type: GrantFiled: April 13, 1999Date of Patent: August 13, 2002Assignee: Rohm and Haas CompanyInventors: Ward Thomas Brown, Michael Damian Bowe, Richard Foster Merritt, Ronald Scott Beckley, Barry Clifford Lange, Robert Wilczynski
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Patent number: 6433105Abstract: A butadiene-type polymer suitable for use as a processing aid in a rubber composition is formed by polymerizing butadiene or other conjugated diene monomers in a solvent, such as hexane, to form a polymer of relatively low molecular weight (around 30-40,000 g/mole). The polymer is coupled with a coupling agent, such as tin tetrachloride, to increase its molecular weight to a level at which conventional desolventizing processes may be used to remove the solvent from the mix. After desolventizing, the polymer is decoupled, by heating, to return the polymer to its original molecular weight.Type: GrantFiled: June 9, 2000Date of Patent: August 13, 2002Assignee: Bridgestone CorporationInventor: Thomas J. Lynch
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Patent number: 6432861Abstract: In a process for reacting an organic compound in the presence of a catalyst comprising, as active metal, at least one metal of transition group VIII of the Periodic Table, either alone or together with at least one metal of transition group I or VII of the Periodic Table, in an amount of from 0.01 to 30% by weight, based on the total weight of the catalyst, applied to a support containing macropores, the support comprises, as a support component, boron(III) oxide in an amount of from 10 to 100% by weight, based on the total weight of the support.Type: GrantFiled: July 8, 1999Date of Patent: August 13, 2002Assignee: BASF AktiengesellschaftInventors: Boris Breitscheidel, Uwe Diehlmann, Alois Kindler, Jochem Henkelmann, Arnd Böttcher
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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: 6420488Abstract: The present invention provides for a coupling system (white filler/diene elastomer) for a rubber composition based on diene elastomer reinforced with a white filler, formed by the association of a polysulphurized alkoxysilane, an enamine and a guanidine derivative. The invention also provides a rubber composition usable for the manufacture of tires, comprising, as base constituents, one or more diene elastomer(s), a reinforcing white filler, a polysulphurized alkoxysilane coupling agent (white filler/diene elastomer), with which are associated an enamine and a guanidine derivative. Also provided is a process for preparing such a rubber composition, and a tire or semi-finished product, in particular a tread for a tire, comprising a rubber composition according to the invention.Type: GrantFiled: November 28, 2000Date of Patent: July 16, 2002Assignee: Michelin Recherche et Technique S.A.Inventor: Christophe Penot
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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: 6410657Abstract: This invention relates to a method for the selective hydrogenation of the unsaturated double bonds in the conjugated diene units of a homopolymer or copolymer in the presence of a novel homogeneous organotitanium-based catalyst. Also, the process of this invention can demonstrate a high yield of hydrogenation and hydrogenation reproducibility using a novel catalyst, so prepared from a mixture consisting of a substituted or unsubstituted monocyclopentadienyl titanium compound expressed by the following formula 1 and lithium hydride derived from a reaction of both alkyl lithium and hydrogen in solution.Type: GrantFiled: August 15, 2000Date of Patent: June 25, 2002Assignee: Korea Kumho Petrochemical Co., LTDInventors: Young Hoon Ko, Hoo Chae Kim, Jae Yun Kim, Jin Man Hwang
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Publication number: 20020077429Abstract: There is provided a process for producing a modified diene polymer rubber, which comprises the steps of:Type: ApplicationFiled: August 20, 2001Publication date: June 20, 2002Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Katsunari Inagaki, Seiichi Mabe, Yoshihiro Nakatsuji
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Patent number: 6403727Abstract: A process for selectively hydrogenating ethylenically unsaturated double bonds in polymers P involves reacting the polymers P with hydrogen in the presence of at least one hydrogenation catalyst selected from the salts and complex compounds of rhodium and/or of ruthenium in an aqueous dispersion of the polymers P that comprises not more than 20% by volume of an organic solvent. This process can be used to give hydrogenated polymer dispersions and, from these dispersions, polymers. Also claimed are aqueous polymer dispersions comprising polymers P′, which include structural units I, II and III as in claim 10, with or without structural units IV and/or V as in claim 11.Type: GrantFiled: June 1, 2000Date of Patent: June 11, 2002Assignee: BASF AktiengesellschaftInventors: Hartmann F. Leube, Jürgen Schmidt-Thümmes, Edgar Zeller, Heiko Maas
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Patent number: 6395841Abstract: The present invention is a continuous process for hydrogenating an unsaturated polymer comprising: contacting the unsaturated polymer with a hydrogenating agent in a fixed bed reactor, wherein the reactor is packed with a hydrogenation catalyst characterized in that the hydrogenation catalyst comprises a Group VIII metal component and at least one deactivation resistant component.Type: GrantFiled: November 21, 2000Date of Patent: May 28, 2002Assignee: The Dow Chemical CompanyInventors: Edward M. Calverley, Avani Patel, Dennis A. Hucul, Jonathan H. Siddall