At Least Two Polymers Derived From Reactants Containing Two Or More Ethylenic Groups And Devoid Of An Aryl Ring Patents (Class 525/236)
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Patent number: 6498215Abstract: A molded or formed product obtained by molding or forming a resin composition comprising (A) at least one vinyl cyclic hydrocarbon polymer selected from the group consisting of hydrogenated products of aromatic vinyl polymers, vinylcyclohexene polymers or hydrogenated products thereof, and vinylcyclohexane polymers, and (B) at least one substance selected from the group consisting of compounding additives incompatible with the polymer, organic compounds having at least one alcoholic hydroxyl group and at least one ether linkage, and organic compounds having at least one alcoholic hydroxyl group and at least one ester linkage, wherein the initial light transmittance (a) of the molded or formed product at an optional wavelength within a range of 400 to 800 nm and the light transmittance (b) of the molded or formed product after the molded or formed product is held for 1,000 hours in an atmosphere of 65° C.Type: GrantFiled: November 21, 2001Date of Patent: December 24, 2002Assignee: Nippon Zeon Co., Ltd.Inventors: Teruhiko Suzuki, Tsutomu Nagamune, Teiji Kohara
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Patent number: 6489401Abstract: The present invention provides a one-piece golf ball having good durability, good shot feel and excellent flight performance. The present invention relates to a one-piece golf ball formed by vulcanizing and press molding a rubber composition comprising a base rubber, co-crosslinking agent, organic peroxide and inorganic filler, wherein the base rubber comprises (1) polybutadiene (A) having a weight average molecular weight (Mw) of 55×104 to 69×104 and a number average molecular weight (Mn) of 10×104 to 20×104, and (2) polybutadiene (B) having a weight average molecular weight (Mw) of 70×104 to 120×104 and a number average molecular weight (Mn) of 13×104 to 25×104, in a weight ratio (A/B) of 3/97 to 70/30.Type: GrantFiled: May 18, 2001Date of Patent: December 3, 2002Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Seiichiro Endo
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Patent number: 6482892Abstract: An olefinic thermoplastic elastomer composition which does not exhibit problems due to a softening agent such as an oil is superior in molding processability. The thermoplastic elastomer composition is produced by a heat crosslinking process of a resin-rubber composition that contains an olefinic and/or diene rubber, an olefinic resin, and a vinyl copolymer. The vinyl copolymer is obtained by copolymerizing 20 wt % or more of a vinyl monomer represented by CH2═CHOCOR1 or CH2═CHOR2 wherein R1 and R2 are alkyl groups having 1-6 carbon atoms. The thermoplastic elastomer composition can include a vinyl copolymer that has not undergone a heat crosslinking process.Type: GrantFiled: June 27, 2000Date of Patent: November 19, 2002Assignee: JSR Elastomix Co., Ltd.Inventors: Seizo Katayama, Kazuo Kimura, Kazuhiro Ohashi, Minoru Horie
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Patent number: 6476143Abstract: A method of preparing a functionalized polymer comprising the steps of initiating the formation and propagation of an anionically-polymerized living polymer, and terminating the propagation of the living polymer by reacting the polymer with a terminating agent selected from the group of agents defined by the formulas (III), (IV), and (V) where C is a carbon atom, S is a sulfur atom, X is a halogen atom, R2 and R4 are independently selected from hydrogen and carbon-based moieties, and where the phenyl groups are selected from unsubstituted and substituted phenyl groups.Type: GrantFiled: June 8, 2001Date of Patent: November 5, 2002Assignee: Bridgestone CorporationInventors: David F. Lawson, Mark L. Stayer, Thomas A. Antkowiak
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Patent number: 6437205Abstract: A process for polymerizing 1,3-butadiene into a low molecular weight high-cis polybutadiene is described using a catalyst system comprising: (a) a neodymium-containing compound, (b) an aluminoxane or a trialkyl aluminum compound, (c) an organoaluminum hydride, and (d) a halogen source. A blend of a high molecular weight high-cis polybutadiene and the low molecular weight high-cis polybutadiene is also disclosed for use in pneumatic tire treads. Desirably both the high and the low molecular weight polymers have high cis contents, with the low molecular weight polymer being at least 70 percent cis and the high molecular weight polymer being at least 92 percent cis. Desirably both polymers are made with a neodymium catalyst system. The blends provide a balance of properties including good snow traction, wet traction, and rolling resistance while providing a balance of good physical properties including tension at break, modulus etc.Type: GrantFiled: July 10, 2000Date of Patent: August 20, 2002Assignee: Bridgestone CorporationInventors: H. Jerrold Miller, Tatsuro Hamada, Yoichi Ozawa, Peyman Pakdel
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Patent number: 6426387Abstract: A golf ball core incorporates a cobalt-catalyzed polybutadiene rubber falling within particular specifications for various material values. The material allows for manufacture of a core having a desirable coefficient of restitution and compression properties, while also exhibiting ease of processing. The core also can incorporate a high-cis content, high viscosity polybutadiene rubber to further enhance its coefficient of restitution and compression properties, while maintaining good ease of processing.Type: GrantFiled: August 4, 2000Date of Patent: July 30, 2002Assignee: Taylor Made Golf Company, Inc.Inventor: Hyun Jin Kim
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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: 6420484Abstract: Tire rubbers which are prepared by anionic polymerization are frequently coupled with a suitable coupling agent, such as a tin halide, to improve desired properties. It has been unexpectedly found that greatly improved properties for tire rubbers, such as lower hysteresis, can be attained by asymmetrically coupling the rubber.Type: GrantFiled: October 1, 2001Date of Patent: July 16, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Wen-Liang Hsu, Adel Farhan Halasa, Barry Allen Matrana
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Patent number: 6417278Abstract: A low compression, resilient golf ball having a center including a material formed from the conversion reaction of sufficient amounts of polybutadiene, a free radical source, and a cis-to-trans catalyst to convert a portion of cis-isomer to trans-isomer in the polybutadiene, which reaction occurs at a sufficient temperature to form the material that contains trans-isomer and cis-isomer, wherein said material has an amount of trans-isomer greater than the amount of trans-isomer present before the conversion reaction, at least one intermediate layer disposed about the center and including a resilient polymer component and a reinforcing polymer component present in an amount sufficient to provide an uncrosslinked first mixture having a rigidity as determined by a flexural modulus greater than about 3.5 MPa, wherein the center and each intermediate layer together form the core, and a cover being disposed about the core, wherein the golf ball has a diameter of at least about 1.68 inches.Type: GrantFiled: May 22, 2000Date of Patent: July 9, 2002Assignee: Acushnet CompanyInventors: Derek A. Ladd, Laurent Bissonnette, David A. Bulpett, Mark N. Wrigley
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Patent number: 6410624Abstract: Rubber compositions comprised of novel blends of segmented styrene-rich styrene/isoprene/butadiene terpolymer elastomer and at least one additional elastomer and tires with treads comprised of such rubber composition. Such tires may exhibit increased traction and reduced rolling resistance.Type: GrantFiled: September 14, 1999Date of Patent: June 25, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Neil Arthur Maly, Paul Harry Sandstrom, Wen-Liang Hsu, Adel Farhan Halasa
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Patent number: 6407185Abstract: Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI2 of 5 to 1000 g/10 min and a polymer of melt index MI5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 to 50,000 and the weight ratio of the two polymers being equal to (30 to 70):(70 to 30), according to which part of the ethylene, a catalyst derived from a transition metal having an intrinsic molecular weight distribution defined by an intrinsic Mw/Mn ratio less than or equal to 10 and a deactivation constant less than or equal to 0.5 h−1, and a cocatalyst are introduced into a first reactor, polymerization of the ethylene is carried out therein, a mixture comprising one of the polymers, the catalyst and the cocatalyst is drawn off from this reactor and the mixture and another part of the ethylene are introduced into a second reactor, which ethylene is polymerized to form the other polymer.Type: GrantFiled: April 14, 2000Date of Patent: June 18, 2002Assignee: Solvay (Societe Anonyme)Inventor: Michel Promel
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Patent number: 6399706Abstract: The present invention relates to rubber compounds comprising at least one rubber which contains double bonds, at least one rubber gel, and at least one sulfur-containing organosilicon compound. Vulcanized materials which can be employed in particular for the production of tire treads can be produced from the rubber compounds according to the invention.Type: GrantFiled: June 20, 2000Date of Patent: June 4, 2002Assignee: Bayer AktiengesellschaftInventors: Werner Obrecht, Winfried Jeske
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Patent number: 6395833Abstract: A thermoplastic elastomeric resin composition for powder molding, comprising a composition prepared by dynamically vulcanizing (a) a block copolymer of a vinyl aromatic compound and a conjugated diene compound, and/or a hydrogenated block copolymer thereof, (b) a non-aromatic softening agent for rubber, (c) a peroxide-decomposing olefinic resin, (d) an unsaturated glycidyl compound, (e) an unsaturated carboxylic acid or a derivative thereof, and (f) a liquid polybutadiene, and (h) at least one material selected from the group consisting of polyester, polyurethane, and polyamide polymers and copolymers; characterized in that (p) a compound represented by the following chemical formula (I) is also comprised: H2C═CH—CH2—O—(CnH2nO)m—X (I) wherein n is an integer of from 2 to 5, CnH2n may be branched, x represents H or CH═CH2, m is the number of the repeating unit, CnH2nO, and a number average molecular weight of the compound is in a range of from 200 to 6,000.Type: GrantFiled: September 21, 2000Date of Patent: May 28, 2002Assignee: Riken Technos CorporationInventors: Michihisa Tasaka, Toshimi Yamanaka
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Patent number: 6391972Abstract: It is an object of the present invention to provide a plastic article having moist touch, which differs from the smooth touch peculiar to the conventional plastic articles. A plastic article is characterized in that the surface of the article is at least partially constituted from a styrenic thermoplastic elastomer, an olefinic thermoplastic elastomer, a blend of a styrenic thermoplastic elastomer and a polyolefin, or a blend of an olefinic thermoplastic elastomer and a polyolefin.Type: GrantFiled: September 16, 1999Date of Patent: May 21, 2002Assignee: Heiwa Kagaku Kogyosho Co., Ltd.Inventor: Kazuyuki Hatakeyama
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Patent number: 6388014Abstract: A latex or fiber comprising a blend of polymeric materials consisting of one or more &agr;-olefin/ vinylidene monomer non-crosslinked substantially random interpolymers, wherein the distribution of the monomers of said interpolymers can be described by the Bernoulli statistical model or by a first or second order Markovian statistical model, and one or more homopolymers or copolymers of monomer components comprising aliphatic &agr;-olefins having from 2 to 20 carbon atoms, or aliphatic &agr;-olefins having from 2 to 20 carbon atoms and containing polar groups.Type: GrantFiled: April 27, 2001Date of Patent: May 14, 2002Assignee: The Dow Chemical CompanyInventors: Chung P. Park, Rene Broos, Johan Thoen, Martin J. Guest, Yunwa W. Cheung, John J. Gathers, Bharat I Chaudhary, Lawrence S. Hood
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Patent number: 6378582Abstract: The present invention relates to a tire tread compound that is highly loaded with silica. This compound offers the advantages of silica compounding without the need for solution SBR. More specifically, the tire tread rubber formulations of this invention offer an excellent combination of traction, treadwear and rolling resistance characteristics. The subject invention discloses a tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads; wherein said tread is adapted to be ground-contacting; wherein the tread is comprised of (1) 10 phr to 35 phr of high vinyl polybutadiene rubber having a glass transition temperature which is within the range of −40° C. to 10° C., (2) 65 phr to 90 phr of tin-coupled isoprene-butadiene rubber having a glass transition temperature which is within the range of −90° C.Type: GrantFiled: September 20, 2000Date of Patent: April 30, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Paul Harry Sandstrom, Adel Farhan Halasa, Wen-Liang Hsu, Edward John Blok
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Patent number: 6376612Abstract: A golf ball core formed from a composition including a (i) cobalt catalyzed polybutadiene and (ii) a blend of lanthanide catalyzed polybutadienes having Mooney viscosities of about 30-70.Type: GrantFiled: January 22, 2000Date of Patent: April 23, 2002Assignee: Spalding Sports Worldwide, Inc.Inventors: R. Dennis Nesbitt, Mark L. Binette, Michael J. Sullivan
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Publication number: 20020042465Abstract: A tire for vehicles includes a tread having a vulcanized polymeric base including at least one reinforcing filler dispersed in the polymeric base; an amount of extractable residue of at least one vulcanization accelerator, containing at least one carbon atom bound to at least two sulfur atoms, from 0.5% to 1.8% by weight based on a total weight of the tread; an amount of at least one activator, expressed as equivalents of zinc oxide, not higher than 2% by weight based on the total weight of the tread; and an amount of combined sulfur lower than 2.5% by weight based on the total weight of the tread. A tread for vehicle tires, a vulcanizable rubber composition for the manufacture of such a tread, and a vulcanizing system, all related to the tire for vehicles, are also disclosed.Type: ApplicationFiled: June 20, 2001Publication date: April 11, 2002Inventors: Luigi Migliarini, Cristiano Bette, Fabio Negroni
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Patent number: 6365660Abstract: A molded or formed product obtained by molding or forming a resin composition comprising (A) at least one vinyl cyclic hydrocarbon polymer selected from the group consisting of hydrogenated products of aromatic vinyl polymers, vinylcyclohexene polymers or hydrogenated products thereof, and vinylcyclohexane polymers, and (B) at least one substance selected from the group consisting of compounding additives incompatible with the polymer, organic compounds having at least one alcoholic hydroxyl group and at least one ether linkage, and organic compounds having at least one alcoholic hydroxyl group and at least one ester linkage, wherein the initial light transmittance (a) of the molded or formed product at an optional wavelength within a range of 400 to 800 nm and the light transmittance (b) of the molded or formed product after the molded or formed product is held for 1,000 hours in an atmosphere of 65° C.Type: GrantFiled: January 26, 2000Date of Patent: April 2, 2002Assignee: Nippon Zeon Co., Ltd.Inventors: Teruhiko Suzuki, Tsutomu Nagamune, Teiji Kohara
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Patent number: 6361643Abstract: 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: GrantFiled: January 26, 2001Date of Patent: March 26, 2002Assignee: Henkel Teroson GmbHInventors: Peter Born, Hubert Schenkel
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Patent number: 6350793Abstract: Disclosed herein is a game ball and method for making the same. The game ball has an ionomeric cover which includes a combination of ionomeric crosslinks and covalent crosslinks. The game ball cover is superior in at least one of cut resistance and scuff resistance to a conventional cover that does not have covalent crosslinks but is otherwise substantially identical in composition. The game ball cover of the invention is particularly useful for improving the durability of golf balls to be struck with sharp-grooved clubs.Type: GrantFiled: January 22, 2000Date of Patent: February 26, 2002Assignee: Spalding Sports Worldwide, Inc.Inventors: Thomas J. Kennedy, III, Mark L. Binette, R. Dennis Nesbitt, Michael J. Sullivan
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Patent number: 6344522Abstract: Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI2 of 5 to 1000 g/10 min and a polymer of melt index MI5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 to 50,000 and the weight ratio of the two polymers being equal to (30 to 70):(70 to 30), according to which part of the ethylene, a catalyst derived from a transition metal having an intrinsic molecular weight distribution defined by an intrinsic Mw/Mn ratio less than or equal to 10 and a deactivation constant less than or equal to 0.5 h−1, and a cocatalyst are introduced into a first reactor, polymerization of the ethylene is carried out therein, a mixture comprising one of the polymers, the catalyst and the cocatalyst is drawn off from this reactor and the mixture and another part of the ethylene are introduced into a second reactor, which ethylene is polymerized to form the other polymer.Type: GrantFiled: April 14, 2000Date of Patent: February 5, 2002Assignee: Solvay Polyolefins - Europe BelgiumInventor: Michel Promel
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Patent number: 6331594Abstract: A process for preparing blends of syndiotactic 1,2-polybutadiene and rubbery elastomers comprising the steps of (1) providing a mixture of high cis-1,4-polybutadiene rubber cement and 1,3-butadiene monomer, and (2) combining (a) an iron-containing compound, (b) a hydrogen phosphite, and (c) an organoaluminum compound to form a catalyst composition outside the presence of the mixture of rubber cement and monomer, and (3) adding the catalyst composition to the mixture and thereby polymerizing the 1,3-butadiene monomer into syndiotactic 1,2-polybutadiene within the rubber cement.Type: GrantFiled: January 23, 2001Date of Patent: December 18, 2001Assignee: Bridgestone CorporationInventor: Steven Luo
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Patent number: 6329466Abstract: A foam comprising a blend of polymeric materials consisting of one or more &agr;-olefin/vinylidene monomer non-crosslinked substantially random interpolymers, wherein the distribution of the monomers of said interpolymers can be described by the Bernoulli statistical model or by a first or second order Markovian statistical model, and one or more homopolymers or copolymers of monomer components comprising aliphatic &agr;-olefins having from 2 to 20 carbon atoms, or aliphatic &agr;-olefins having from 2 to 20 carbon atoms and containing polar groups.Type: GrantFiled: October 12, 2000Date of Patent: December 11, 2001Assignee: The Dow Chemical CompanyInventors: Chung P Park, Rene Broos, Johan Thoen, Martin J. Guest, Yunwa W. Cheung, John J. Gathers, Bharat I Chaudhary, Lawrence S. Hood
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Patent number: 6323284Abstract: The present invention is broadly directed to a process for copolymerizing one or more alpha-olefins and one or more di-olefin monomers in the presence of at least one stereospecific metallocene catalyst system and at least one non-stereospecific metallocene catalyst system. Crosslinking of at least a portion of the mixture of polymer segments is accomplished during the polymerization of the composition by incorporation of single di-olefin comonomers into two polymer segments.Type: GrantFiled: December 10, 1999Date of Patent: November 27, 2001Assignee: ExxonMobil Chemical Patents, Inc.Inventor: Andrew J. Peacock
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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: 6316508Abstract: The present invention provides a rubber composition containing a reclaimed rubber and a method for producing the same. A rubber molded article having excellent rubber properties can be obtaining and the recycling of a used rubber product can be promoted by the present invention. A rubber composition of the present invention is a blend comprising a reclaimed rubber obtained by applying a heat and a shear stress to a vulcanized rubber, a non-vulcanized virgin rubber or/and a thermoplastic resin, wherein the reclaimed rubber contains 40% by weight or more of a residual toluene-insoluble gel component and the network chain density of the rubber in the component is 1/20 to 1/4 based on the network chain density of the rubber of the vulcanized rubber.Type: GrantFiled: November 27, 2000Date of Patent: November 13, 2001Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha, Toyoda Gosei Co., Ltd.Inventors: Mitsumasa Matsushita, Makoto Mouri, Hirotaka Okamoto, Norio Sato, Yasuyuki Suzuki, Masao Owaki, Noriyuki Suzuki, Katsumi Nakashima, Hidenobu Honda, Toru Yoshida, Katsumasa Takeuchi
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Publication number: 20010031847Abstract: This invention relates to novel resins, blends of the novel resins with base polymers and a process for producing a resin comprising combining a reactor feed blend comprising:Type: ApplicationFiled: March 9, 2001Publication date: October 18, 2001Inventors: Anne Vera Macedo, Martijn Hendrik Willem Burgers, Maria Leonor Garcia, Lutz Erich Jacob, Jozef Aleida Florent Smits, R. Derric Lowery, Jerry Lee Haluska, Charles L. Sims, Frank Carl Jagisch
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Patent number: 6303694Abstract: A process for the preparation of a sealant composition by mixing an elastomer in the substantial absence of an organic solvent and separately dispersing a quinoid curing agent in a polymer having a molecular weight below about 5,000 to form a curing agent concentrate. Thereafter, combining the curing agent concentrate with the elastomer to form the sealant composition. The composition is a rubber masterbatch having many applications and is advantageously, substantially free from organic solvents.Type: GrantFiled: February 18, 2000Date of Patent: October 16, 2001Assignee: Bridgestone CorporationInventors: Terrence E. Hogan, William L. Hergenrother, Christine Morehart
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Publication number: 20010012875Abstract: This invention is based upon the discovery that cyclized polyisoprene polymers can be incorporated into tire tread compounds to improve traction, treadwear, and resistance to tear. It is further based upon the discovery that cyclized polyisoprene polymers can be blended with halobutyl rubber and/or natural rubber and can be utilized in tire innerliner formulations. The present invention more specifically discloses a tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidwalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein said tread is comprised of a sulfur cured rubber composition which is comprised of about 5 phr to about 50 phr of cyclized polyisoprene and about 50 phr to about 95 phr of at least one other rubbery polymer.Type: ApplicationFiled: April 2, 2001Publication date: August 9, 2001Applicant: The Goodyear Tire & Rubber CompanyInventors: Paul Harry Sandstrom, Joseph Frank Geiser, Judy Chu, David John Zanzig, Richard George Bauer
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Patent number: 6262178Abstract: This invention is based upon the discovery that cyclized polyisoprene polymers can be incorporated into tire tread compounds to improve traction, treadwear, and resistance to tear. It is further based upon the discovery that cyclized polyisoprene polymers can be blended with halobutyl rubber and/or natural rubber and can be utilized in tire innerliner formulations. The present invention more specifically discloses a tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein said tread is comprised of a sulfur cured rubber composition which is comprised of about 5 phr to about 50 phr of cyclized polyisoprene and about 50 phr to about 95 phr of at least one other rubbery polymer.Type: GrantFiled: December 28, 1999Date of Patent: July 17, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Paul Harry Sandstrom, Joseph Frank Geiser, Judy Chu, David John Zanzig, Richard George Bauer
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Patent number: 6251997Abstract: A polypropylene resin composition, which is light weighing, has very high values for the stiffness and heat resistance and is superior in the scratch-proof property with better moldability upon molding and which can be injection-molded into formed articles without occurrence of cracking, comprising 5-25% by weight of a higher molecular weight polypropylene (A) having an intrinsic viscosity [&eegr;], determined in decalin at 135° C., in the range from 6 to 11 dl/g and 95-75% by weight of a lower molecular weight polypropylene (B) having an intrinsic viscosity [&eegr;], determined in decalin at 135° C., in the range from 0.6 to 1.6 dl/g, wherein the said resin composition has the following charactristic features <<1>> and <<2>>, namely, <<1>> an isotactic pentad fraction (mmmm-fraction), determined by 13C-NMR, of at least 96.Type: GrantFiled: February 3, 2000Date of Patent: June 26, 2001Assignee: Grand Polymer Co LtdInventors: Tadashi Imai, Mikio Hashimoto, Shigeru Harima
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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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Rubber composition, method of formulating and blending the same and article and tires made therefrom
Patent number: 6242534Abstract: A rubber mixture containing at least one rubber component, at least one filler, and conventional additives that it contain at least one first gel as a filler, which is essentially comprised of a rubber, has a particle size of 3×10−9 to 1×10−6 m, and has a swelling index in toluene of 1 to 15, and at least the surface of this gel has acid or base groups, where these groups have not been produced by means of reaction with dithiophosphoric acid, and comprises: a) at least one second gel as an additional filler, which is essentially comprised of a rubber, has a particle size of 3×10−9 to 1×10−6 m, and has a swelling index in toluene of 1 to 15, which is in a position to undergo a neutralization reaction with the acid or base groups of the first gel and/or b) contains at least one substance as an additional additive, which is capable of undergoing a neutralization reaction with the acid or base groups of at least one gel.Type: GrantFiled: July 30, 1999Date of Patent: June 5, 2001Assignee: Continental AktiengesellschaftInventors: Werner Obrecht, Thomas Scholl, Peter Wendling, Michael Well, Victor Monroy -
Patent number: 6218469Abstract: Disclosed is an unsaturated elastomer composition comprising (A) an unsaturated olefin copolymer of at least one &agr;-olefin of 2 to 20 carbon atoms, a conjugated diene monomer represented by the following formula (I), and optionally, an aromatic vinyl compound, and (B) at least one rubber selected from a diene rubber and an ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber, a weight ratio of said component (A) to said component (B) ((A)/(B)) being in the range of 1/99 to 99/1; wherein R1 and R2 are each independently a hydrogen atom, an alkyl group of 1 to 8 carbon atoms or an aryl group, and at least one of R1 and R2 is a hydrogen atom. From the composition, a vulcanized product excellent in vibration damping properties, vibration insulation properties and strength properties as well as in heat resistance, weathering resistant, ozone resistance and dynamic fatigue resistance can be obtained.Type: GrantFiled: July 17, 1998Date of Patent: April 17, 2001Assignee: Mitsui Chemicals INCInventors: Kenichi Morizono, Keiji Okada, Masayoshi Yamaguchi
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Patent number: 6218473Abstract: The present invention relates to a sulfur cured rubber composition particularly suited for use in tire treads. The sulfur cured rubber composition is composed of, based on 100 parts by weight of rubber, from about 1.0 to 15 parts by weight of a chlorosulfonated polyethylene; from about 1.0 to 15 parts by weight of a carboxylated nitrile rubber; and 98 to 70 parts by weight of a rubber selected from the group consisting of medium vinyl polybutadiene, styrene-butadiene rubber, synthetic cis-1,4-polyisoprene, synthetic 3,4-polyisoprene, natural rubber, cis-1,4-polybutadiene, styrene-isoprene rubber, styrene-isoprene-butadiene rubber, acrylonitrile-butadiene rubber and mixtures thereof.Type: GrantFiled: December 14, 1999Date of Patent: April 17, 2001Assignee: The Goodyear Tire & Rubber CompanyInventor: Paul Harry Sandstrom
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Patent number: 6207723Abstract: The present invention provides a rubber composition containing a reclaimed rubber and a method for producing the same. A rubber molded article having excellent rubber properties can be obtained and the recycling of a used rubber product can be promoted by the present invention. A rubber composition of the present invention is a blend comprising a claimed rubber obtained by applying a heat and a shear stress to a vulcanized rubber, a non-vulcanized virgin rubber or/and a thermoplastic resin, wherein the reclaimed rubber contains 40% by weight or more of a residual toluene-insoluble gel component and the network chain density of the rubber in the gel component is 1/20 to 1/4 based on the network chain density of the rubber of the vulcanized rubber.Type: GrantFiled: January 25, 1999Date of Patent: March 27, 2001Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha, Toyoda Gosei Co., Ltd.Inventors: Mitsumasa Matsushita, Makoto Mouri, Hirotaka Okamoto, Norio Sato, Yasuyuki Suzuki, Masao Owaki, Noriyuki Suzuki, Katsumi Nakashima, Hidenobu Honda, Toru Yoshida, Katsumasa Takeuchi
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Patent number: 6191226Abstract: The invention relates to polybutadiene rubber wherein a molecular weight distribution curve of the rubber as determined by gel permeation chromatography (GPC) has 2 peaks attributable to a high molecular weight component and a low molecular weight component, a peak top molecular weight of the high molecular weight component and a peak top molecular weight of the low molecular weight component fall within ranges of from 100,000 to 1,500,000 and from 10,000 to 50,000, respectively, a ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), Mw/Mn, falls within a range of from 4.5 to 14.5, and the content of a cis-1,4 structure is at least 80 wt. %, a high-impact aromatic vinyl resin composition comprising the polybutadiene rubber, and a preparation process of the resin composition.Type: GrantFiled: February 19, 1999Date of Patent: February 20, 2001Assignee: Nippon Zeon Co., Ltd.Inventors: Hiroaki Matsuda, Kohkichi Noguchi
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Patent number: 6187855Abstract: A rubbery adhesive composition wherein at least one adherend is a rubber composition including butadiene rubber as a rubber ingredient, characterized in that butadiene rubber is included as a rubber ingredient and 3˜20% by weight of the butadiene rubber is syndiotactic-1,2-polybutadiene. Thus, it is possible to enhance the strength of the rubbery adhesive composition itself to improve the adhesion property before and after vulcanization without damaging the adhesion property at the interface.Type: GrantFiled: May 19, 1998Date of Patent: February 13, 2001Assignee: Bridgestone CorporationInventors: Yuichi Nagai, Ken Yamaguchi
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Patent number: 6184296Abstract: The rubber mixtures containing modified rubber gels according to the invention prepared from at least one rubber gel modified with compounds containing sulphur and reactive towards C═C double bonds and at least one rubber containing double bonds are preferable suitable for the production of vulcanizates which have an unusually strong reinforcing action in rubber vulcanizates. The vulcanisates furthermore exhibit unusually low dynamic damping at relatively elevated temperatures. They are thus particularly suitable for the production of low rolling resistance motor vehicle tire treads.Type: GrantFiled: January 14, 1998Date of Patent: February 6, 2001Assignee: Bayer AGInventors: Werner Obrecht, Thomas Scholl, Ulrich Eisele, Winfried Jeske
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Patent number: 6184294Abstract: A fabricated article other than a film comprising a thermoplastic blend prepared from polymeric materials consisting of; (A) from 1 to 99 weight percent of at least one interpolymer made from monomer components comprising (1) from 0.5 to 65 mole percent of (a) at least one aromatic vinylidene monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinylidene monomer, or (c) a combination of at least one aromatic vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinylidene monomer, and (2) from 99.5 to 35 mole percent of at least one aliphatic &agr;-olefin having from 2 to 20 carbon atoms; and (B) from 99 to 1 weight percent of at least one polymer made from monomer components comprising at least one &agr;-olefin having from 2 to 20 carbon atoms. These articles possess improved properties when compared to the properties of articles derived from the individual polymers comprising the blend.Type: GrantFiled: March 2, 1999Date of Patent: February 6, 2001Assignee: The Dow Chemical CompanyInventors: Chung P. Park, Johan Thoen, Rene Broos, Martin J. Guest, Yunwa W. Cheung, Bharat I Chaudhary, John J. Gathers, Lawrence S. Hood
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Patent number: 6172160Abstract: The invention provides a diene polymer composition composed of a branched diene polymer component (A) having at least three branched diene polymer chains through a polyfunctional coupling agent and a linear diene polymer component (B) having a quaternary ammonium group, and having a weight average molecular weight (Mw) within a range of from 100,000 to 2,000,000, a preparation process of the diene polymer composition, and a rubber composition comprising a rubber component containing the diene polymer composition, and a reinforcing agent.Type: GrantFiled: October 15, 1998Date of Patent: January 9, 2001Assignee: Nippon Zeon Co., Ltd.Inventors: Masao Nakamura, Yukio Takagishi
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Patent number: 6156872Abstract: The invention is related to non-linear, paraffin-soluble olefin/carbon monoxide and olefin/acetylene/carbon monoxide copolymers. The invention is also related to a method for preparing olefin/carbon monoxide copolymers by heating a feed of at least one olefin, carbon monoxide, carbon dioxide, hydrogen, and methane in the presence of a free radical polymerization initiator. More particularly, the feed comprises at least one olefin, the total olefin amount ranging from about 5 to about 40 mole %, carbon monoxide in an amount ranging from about 1 to about 40 mole %, hydrogen in an amount ranging from about 4 to about 55 mole %, carbon dioxide in an amount ranging from about 3 to about 10 mole %, and methane in an amount ranging from about 4 to about 85 mole %. The feed may also include acetylene in an amount ranging up to about mole %.Type: GrantFiled: January 19, 1999Date of Patent: December 5, 2000Assignee: Exxon Research and Engineering Co.Inventors: Abhimanyu O. Patil, Donald N. Schulz, Raymond A. Cook, Michael G. Matturro
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Patent number: 6153702Abstract: A novel propylene copolymer is disclosed. Also disclosed is a novel composition comprising about 85 to about 99 weight percent of a polymeric ethylenic containing component having a density no greater than 0.94 g/cc, and about 1 to about 15 weight percent of a novel propylene copolymer comprising from about 60 to about 80 weight percent propylene, based on the copolymer, and from about 20 to about 40 weight percent olefin comonomer units, the propylene copolymer having a viscosity of about 1 to about 2,000 mPa.cndot.s at 190.degree. C. and a needle penetration of greater than about 150 to about 300 dmm. Also disclosed are films produced from the composition, both blown and cast, and both monolayer and multilayer. Also disclosed are processes for stretch wrapping and forming blown film.Type: GrantFiled: September 2, 1998Date of Patent: November 28, 2000Assignee: Eastman Chemical CompanyInventor: Marc Stacey Somers
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Patent number: 6136924Abstract: Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI.sub.2 of 5 to 1000 g/10 min and a polymer of melt index MI.sub.5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 to 50,000 and the weight ratio of the two polymers being equal to (30 to 70):(70 to 30), according to which part of the ethylene, a catalyst derived from a transition metal having an intrinsic molecular weight distribution defined by an intrinsic M.sub.w /M.sub.n ratio less than or equal to 10 and a deactivation constant less than or equal to 0.5 h.sup.-1, and a cocatalyst are introduced into a first reactor, polymerization of the ethylene is carried out therein, a mixture comprising one of the polymers, the catalyst and the cocatalyst is drawn off from this reactor and the mixture and another part of the ethylene are introduced into a second reactor, which ethylene is polymerized to form the other polymer.Type: GrantFiled: December 13, 1995Date of Patent: October 24, 2000Assignee: Solvay (Societe Anonyme)Inventor: Michel Promel
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Patent number: 6127482Abstract: A composition comprising:(a) polyethylene;(b) a cure booster selected from the group consisting of 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane (DVS); a copolymer of ethylene and DVS; and an ethylene homopolymer or copolymer having DVS grafted thereto; and(c) an organic peroxide.Type: GrantFiled: March 31, 1999Date of Patent: October 3, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Michael John Keogh
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Patent number: 6120880Abstract: The present invention provides performance enhancing shoe components. The invented shoe component includes an upper layer of 1,4-polybutadiene and, optionally, a rubber such as natural rubber, synthetic isoprene rubber or polyisoprene. The first layer is attached to a resilient layer which extends substantially the length of the shoe. Optionally, a third layer or a coating may be attached to the resilient layer. The invented shoe components may be formed as shoe inserts, insoles, midsoles or shoe soles.Type: GrantFiled: August 7, 1998Date of Patent: September 19, 2000Inventor: William R. Crow
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Patent number: 6117941Abstract: Compositions comprising reaction product of higher molecular weight olefinic reactants with carboxylic reactants of the formula R.sup.3 C(O)(R.sup.4).sub.n C(O)OR.sup.5 (IV) or the corresponding acetals, hemiacetals, ketals, and hemiketals thereof are useful as intermediates for further reaction in the preparation of lubricating oil additives.Type: GrantFiled: April 9, 1998Date of Patent: September 12, 2000Assignee: The Lubrizol CorporationInventors: Paul E. Adams, Richard M. Lange, Richard Yodice, Mark R. Baker, Jeffry G. Dietz
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Patent number: RE37683Abstract: A cured adhesive tape composition for adhering together roofing materials such as synthetic EPDM rubber and which provides long term water tightness is provided. The adhesive composition includes substantially equal amounts by weight of a) a rubbery polymer comprising a blend of an ethylene-propylenediene terpolymer, a halogenated butyl rubber or a halogenated copolymer of p-methylstyrene and isobutylene, and polyisobutylene b) a compatible tackifier, and c) an accelerator/cure package for the rubbery polymer. The cured composition exhibits a peel strength of at least 715 grams/cm at room temperature, at least 300 grams/cm at 70° C., and supports a static load of at least 300 grams at 70° C.Type: GrantFiled: January 26, 2001Date of Patent: April 30, 2002Assignee: Adco Products, Inc.Inventors: Brian J. Briddell, Michael J. Hubbard
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Patent number: H2036Abstract: This invention relates to blends of a specific type of cis-l,4-polybutadiene rubber with other rubbery polymers, such as natural rubber, synthetic polyisoprene rubber, styrene-butadiene rubber, isoprene-butadiene rubber and/or styrene-isoprene- butadiene rubber. The cis-1,4-polybutadiene rubber utilized in the blends of this invention is synthesized by polymerizing 1,3-butadiene in the presence of (a) an organonickel compound, (b) an organoaluminum compound, (c) a fluorine containing compound and (d) para-styrenated diphenylamine; wherein the organoaluminum compound and the fluorine containing compound are brought together in the presence of the para-styrenated diphenylamine. The cis-1,4-polybutadiene rubber blends of this invention offer improved processability and enhanced physical properties. For instance, improved mixing which results in better incorporation of pigments and fillers, such as carbon black and silica, at lower levels of power consumption is realized.Type: GrantFiled: June 2, 1999Date of Patent: July 2, 2002Assignee: The Goodyear Tire & Rubber CompanyInventor: Jerry Levi Bush