At Least One Of These Polymers Is Derived From Two Or More Reactants Patents (Class 525/237)
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Patent number: 4670502Abstract: Rubbery high trans-high vinyl diblock copolymers, blends of rubbery high trans copolymers and rubbery high vinyl polymers, and mixtures (alloys or blends) of said diblock copolymers, high trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility, good rolling resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers, copolymers and polymers are made by solution polymerization. The diblock copolymer may be made by copolymerizing butadiene and styrene and/or isoprene using a Ba, Ca or Sr alcoholate, R.sub.2 Mg and R.sub.Type: GrantFiled: April 7, 1986Date of Patent: June 2, 1987Assignee: GenCorp Inc.Inventors: Ivan G. Hargis, Hubert J. Fabris, Russell A. Livigni, Sundar L. Aggarwal, George B. Thomas, John A. Wilson
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Patent number: 4650830Abstract: Disclosed is a thermoplastic elastomer composition excellent in the injection fusion bondability and the surface gloss, which comprises (1) an amorphous ethylene/.alpha.-olefin copolymer (a) and (2) (i) a lowly crystalline copolymer (b) of propylene with an .alpha.-olefin having at least 4 carbon atoms, (ii) a polymer (d) composed mainly of 1-butene or (iii) a combination of the copolymer (b) or the polymer (d) with a crystalline polymer (c) composed mainly of propylene, wherein the component (1) is present in an amount of 10 to 95% by weight based on the total amount of the components (1) and (2), the component (2) is present in an amount of 5 to 90% by weight based on the total amount of the components (1) and (2), and the component (1) or the components (1) and (2) are partially crosslinked.The partial crosslinking is effected by grafting of a radical-polymerizable monomer having at least two polymerizable groups.Type: GrantFiled: May 30, 1984Date of Patent: March 17, 1987Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Katsuyoshi Yonekura, Akira Uchiyama, Akira Matsuda
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Patent number: 4647614Abstract: Disclosed is a diene elastomer composition especially suitable as tread rubber of tires which has low rolling resistance and high wet grip in combination. This elastomer composition contains a rubber material comprising an elastomeric polymer component of a butadiene polymer and/or a styrene-butadiene copolymer and a rubbery component. The elastomeric polymer is produced by using an organolithium compound as a polymerization initiator, and has a long chain end concentration (LCEC) of 1.5 or less as defined by the following formula: ##EQU1## wherein .alpha.: total number of terminal groups in long chain molecules per polymer,MW: a value obtained from intrinsic viscosity of the polymer as measured in toluene at 30.degree. C. by the following formulas:MW=70,660 x[.eta.].sup.1.282 for styrene-butadiene copolymer,MW=79,167 x[.eta.].sup.1.443 for butadiene polymer,.beta.i: weight fraction of component i when MW=(MW).sub.i.Type: GrantFiled: December 5, 1985Date of Patent: March 3, 1987Assignee: Sumitomo Chemical Company, LimitedInventors: Hiroyoshi Takao, Nobuyuki Yoshida, Akio Imai
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Patent number: 4639487Abstract: Heat shrinkable thermoplastic compositions are prepared by blending an ethylene copolymer resin with a rubber and dynamically vulcanizing the rubber. The ethylene copolymer resin is a copolymer of ethylene with an alkyl ester of an alpha, beta monoethylenically unsaturated monocarboxylic acid as well as copolymers of ethylene with the acid per se. The preferred copolymer is ethylene-vinyl-acetate copolymer. The preferred rubber is halogenated butyl rubber. Uncured rubber can be included in the composition.Type: GrantFiled: July 11, 1984Date of Patent: January 27, 1987Assignee: Exxon Research & Engineering Co.Inventors: Donald R. Hazelton, Robert C. Puydak
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Patent number: 4623698Abstract: Petroleum resins having a softening point from 10.degree. C. to 80.degree. C. obtained from C.sub.5 olefines and diolefines and one or more monovinyl aromatic compounds which contain from 10 to 30 wt. % of the aromatic are useful as tackifiers for carboxylated styrene butadiene copolymer to produce pressure sensitive additives especially aqueous based adhesive when the resin is in the form of an emulsion which is also claimed.Type: GrantFiled: March 28, 1985Date of Patent: November 18, 1986Assignee: Exxon Research & Engineering Co.Inventors: Lutz E. Jacob, Andre Lepert, Morris L. Evans
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Patent number: 4621118Abstract: Guayule resin is sulfurized such that it has a high softening point of at least 70.degree. C. The sulfurized guayule resin can be utilized in association with conventional rubbers and the end results in improved properties such as reduced hysteresis loss, increased tensile strength and the like.Type: GrantFiled: March 21, 1985Date of Patent: November 4, 1986Assignee: The Firestone Tire & Rubber CompanyInventors: William W. Schloman, Jr., James A. Davis
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Patent number: 4616065Abstract: Rubbery high trans-high vinyl diblock copolymers, blends of rubbery high trans copolymers and rubbery high vinyl polymers, and mixtures (alloys or blends) of said diblock copolymers, high trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility, good rolling resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers, copolymers and polymers are made by solution polymerization. The diblock copolymer may be made by copolymerizing butadiene and styrene and/or isoprene using a Ba, Ca or Sr alcoholate, R.sub.2 Mg and R.sub.Type: GrantFiled: April 15, 1985Date of Patent: October 7, 1986Assignee: GenCorp Inc.Inventors: Ivan G. Hargis, Hubert J. Fabris, Russell A. Livigni, Sundar L. Aggarwal, George B. Thomas, John A. Wilson
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Patent number: 4611030Abstract: A composition for pneumatic tires including more than 30% of star shaped styrene-butadiene copolymers by solution polymerization with or without one or more types of natural rubbers or diene series synthetic rubbers. The composition value X of the solution polymerization star shaped SBR is obtained by the following equation. ##EQU1## wherein BR is the butadiene component and the vinyl content is the content of 1, 2 bonded butadiene in butadiene component. The value X falls in the range of the lower limit of 26 to the upper limit of 39. And the coupling efficiency of the solution polymerization star shaped SBR is more than 40%.Type: GrantFiled: March 25, 1985Date of Patent: September 9, 1986Assignee: Toyo Tire and Rubber Co., Ltd.Inventors: Masanori Kan, Hideo Fujiwara
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Patent number: 4608305Abstract: Novel, improved binders comprising a combination of heat reactive polymers. The novel binders are especially useful as saturants for fibrous sheet materials to provide high quality shoeboard materials.Type: GrantFiled: June 18, 1984Date of Patent: August 26, 1986Assignee: Texon, Inc.Inventor: Alphonse R. Presto
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Patent number: 4607074Abstract: Thermoplastic compositions of matter useful as gasketing materials as well as flexible boots and seals which are soft, have low compression set and high tensile. The compositions comprise a polyolefin resin and at least two different rubbers, one of which is vulcanized to a fully cured state by a cure system which leaves the other rubber(s) unvulcanized. The preferred embodiment comprises a blend of polypropylene and ethylene vinylacetate as the polyolefin resin component, EPDM as the uncured rubber component and a ZnO cured halogenated butyl rubber. In another embodiment of the invention, the resin is excluded and the uncured rubber is a high crystallinity EPDM.Type: GrantFiled: July 11, 1984Date of Patent: August 19, 1986Assignee: Exxon Research & Engineering Co.Inventors: Donald R. Hazelton, Robert C. Puydak, D. A. Booth
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Patent number: 4603164Abstract: An adhesive for bonding cured EPDM membranes is provided comprising(A) a halogenated butyl rubber(B) a pre-crosslinked butyl rubber(C) methylene-propylene-nonconjugated diene terpolymer(D) a thermoplastic petroleum based hydrocarbon feedstock derived aliphatic monomer resin and(E) an aliphatic isocyanate.Type: GrantFiled: February 19, 1985Date of Patent: July 29, 1986Assignee: Uniroyal Plastics Company, Inc.Inventors: Chester T. Chmiel, Daniel J. Cotsakis
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Patent number: 4593062Abstract: Thermoplastic compositions useful as molded parts including automotive hoses and exterior body parts which exhibit good flow and good surface characteristics in injection molded parts. The compositions comprise equal proportions of a polyolefin, a halogenated butyl rubber and polychloroprene wherein the rubbers have been dynamically vulcanized to a fully cured state in the presence of the polyolefin.Type: GrantFiled: December 10, 1984Date of Patent: June 3, 1986Assignee: Exxon Research & Engineering Co.Inventors: Robert C. Puydak, Donald R. Hazelton
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Patent number: 4590123Abstract: A soft, low-resilience, cured rubber composition is prepared by mixing(a) 100 parts by weight of a polymeric material comprising a styrene-butadiene copolymer or styrene-butadiene copolymer mixture having a styrene content of 53 to 75% by weight, and 0 to 40% by weight of the polymeric material of another rubber ingredient,(b) 30 to 300 parts by weight of a filler, and(c) 5 to 100 parts by weight of a plasticizer, adding effective amounts of a vulcanizing agent and a vulcanizing accelerator to the mixture, and then heat curing the mixture. A similar composition further containing a foaming agent may be heat cured into a low-resilience rubber foam. Rubber and foamed rubber compositions have improved vibration-attenuating and shock-absorbing properties.Type: GrantFiled: July 16, 1985Date of Patent: May 20, 1986Assignee: Bridgestone Tire Co., Ltd.Inventors: Takatsugu Hashimoto, Takashi Ohashi
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Patent number: 4587302Abstract: Disclosed are vulcanized compositions of (1) from about 80% to about 99% of a rubber material selected from the group consisting of butyl rubber, halogenated butyl rubber having from about 1% to about 3% by weight of halogen and mixtures thereof, and (2) from about 1% to about 20% of a chlorinated hydrocarbon polymer having a chlorine content of from about 30% to about 70% by weight of chlorine, said composition having good impermeability to gases and tear resistance and being useful in tire inner tubes and inner liners.Type: GrantFiled: March 25, 1985Date of Patent: May 6, 1986Assignee: Hercules IncorporatedInventor: Dominic A. Berta
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Patent number: 4580781Abstract: Pressureless tennis balls which comply with regulations of the International Tennis Federation and produce a satisfactory feel of striking retained over an extended period of play, and which comprises a hollow spherical core made from a rubber composition the rubber component of which contains 5 to 50% by weight of a particular modified polybutadiene containing 5 to 30% by weight of syndiotactic-1,2-polybutadiene and at least 40% by weight of cis-1,4-polybutadiene.Type: GrantFiled: May 10, 1984Date of Patent: April 8, 1986Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kuniyasu Horiuchi, Masao Nakamura
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Patent number: 4567225Abstract: A rubber composition for tire tread, comprising natural rubber and/or polyisoprene rubber and polybutadiene rubber, which polybutadiene rubber having a 1,2-bond unit content in the range of 40 to 90 mol % and having a specific functional group contained in the molecular chain thereof.Type: GrantFiled: July 5, 1985Date of Patent: January 28, 1986Assignee: The Yokohama Rubber Co., Ltd.Inventors: Makoto Misawa, Tetsuya Mizoguchi, Kinya Kawakami, Asahiro Ahagon
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Patent number: 4557306Abstract: Carbon black products useful in rubber compositions, and rubber compositions (uncured or cured) containing said carbon black products are described. The carbon black products of the invention comprise carbon black having a surface area of at least 20 m.sup.2 /g. and up to about 10% by weight, based on the weight of the carbon black of at least one aromatic furazan oxide. Useful furazan oxides have both carbons of the furazan ring as part of a fused aromatic ring, and particular examples include benzofurazan oxide, and its methyl and methoxy analogs. Improvements in the processability of uncured rubber compositions containing the carbon black products of the invention have been observed.Filled rubber vulcanizates containing the carbon black products of the invention exhibit many improved properties such as increased filler-rubber interaction and decreased hysteresis.Type: GrantFiled: June 18, 1984Date of Patent: December 10, 1985Assignee: The Firestone Tire & Rubber CompanyInventor: Daniel F. Graves
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Patent number: 4555548Abstract: A rubber composition for tire treads, comprising [I] 10 to 90% by weight of a styrene-butadiene copolymer rubber containing not more than 40% by weight of bound styrene and having bonded to a carbon atom of the rubber molecular chain at least 0.1 mole, per mole of the rubber molecular chain, of an atomic grouping represented by the following formula ##STR1## wherein: X represents O or S,R.sub.1 and R.sub.2 are identical or different and each represents an amino group or an alkyl-substituted amino group,R.sub.3 and R.sub.4 are identical or different and each represents a substituent other than the above-mentioned,m, p and q each represent O or an integer of at least 1,n represents an integer of at least 1, m+p=0-5, and n+q=1-5,and [II] 90 to 10% by weight of at least one rubber selected from the group consisting of styrene-butadiene copolymer rubber having a bound styrene content of not more than 40% by weight and polyisoprene rubber.Type: GrantFiled: August 23, 1984Date of Patent: November 26, 1985Assignee: Nippon Zeon Co. Ltd.Inventors: Akio Ueda, Shuichi Akita, Takeshi Chida
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Patent number: 4555547Abstract: A rubber composition for tire treads, comprising [I] 10 to 70% by weight of a polybutadiene rubber having bonded to a carbon atom of the rubber molecular chain at least 0.1 mole, per mole of the rubber molecular chain, of an atomic grouping represented by the following formula ##STR1## wherein X represents O or S, R.sub.1 and R.sub.2 are identical or different and each represents an amino group or an alkyl-substituted amino group, R.sub.3 and R.sub.4 are identical or different and each represents a substituent other than the above-mentioned, m, p and q each represent O or an integer of at least 1, n represents an integer of at least 1, m+p=0-5, and n+q=1-5,and [II] 90 to 30% by weight of at least one rubber selected from the group consisting of styrene-butadiene copolymer rubber having a bound stryene content of not more than 50% by weight and polyisoprene rubber.Type: GrantFiled: August 23, 1984Date of Patent: November 26, 1985Assignee: Nippon Zeon Co. Ltd.Inventors: Akio Ueda, Shuichi Akita, Toshio Namizuka
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Patent number: 4550142Abstract: A rubber composition comprising at least 10% by weight, based on the entire rubber component, of a highly unsaturated polymer rubber having a benzophenone introduced into its molecular chains in an amount of at least 0.1 mole per mole of the rubber molecular chains.Type: GrantFiled: April 26, 1983Date of Patent: October 29, 1985Assignee: Nippon Zeon Co. Ltd.Inventors: Shuichi Akita, Toshio Namizuka
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Patent number: 4546127Abstract: A soft, low-resilience, cured rubber composition is prepared by mixing(a) 100 parts by weight of a polymeric material comprising a styrene-butadiene copolymer or styrene-butadiene copolymer mixture having a styrene content of 53 to 75% by weight, and 0 to 40% by weight of the polymeric material of another rubber ingredient,(b) 30 to 300 parts by weight of a filler, and(c) 5 to 100 parts by weight of a plasticizer, adding effective amounts of a vulcanizing agent and a vulcanizing accelerator to the mixture, and then heat curing the mixture. A similar composition further containing a foaming agent may be heat cured into a low-resilience rubber foam. Rubber and foamed rubber compositions have improved vibration-attenuating and shock-absorbing properties.Type: GrantFiled: August 13, 1984Date of Patent: October 8, 1985Assignee: Bridgestone Tire Co., Ltd.Inventors: Takatsugu Hashimoto, Takashi Ohashi
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Patent number: 4532299Abstract: A method for flexibilizing an epoxy resin is disclosed which comprises (a) preparing a dicarboxy-terminated prepolymer by reacting a carboxylic anhydride with a polybutadiene having a minor amount of pendant vinyl groups at a temperature from about 125.degree. to about 140.degree. F.; (b) reacting the prepolymer with an excess of liquid epoxy resin at a temperature from about 180.degree. to about 200.degree. F.; (c) adding a vinyl monomer in an amount of about 2% to about 25% of the mixture; and (d) adding epoxy and vinyl polymerization catalysts to cure the mixture.Type: GrantFiled: January 21, 1983Date of Patent: July 30, 1985Assignee: Ameron, Inc.Inventor: James A. Seneker
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Patent number: 4530959Abstract: A pneumatic tire with a sulfur cured elastomeric tread composition comprised of medium vinyl polybutadiene cis 1,4-polyisoprene rubber and styrene/butadiene copolymer rubber.Type: GrantFiled: March 8, 1984Date of Patent: July 23, 1985Assignee: The Goodyear Tire & Rubber CompanyInventors: Robert G. Armbruster, Richard M. Scriver
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Patent number: 4515922Abstract: A rubber composition having improved wet skid resistance and rolling resistance is disclosed, which comprises (A) 10-90% by weight of polybutadiene rubber having a content of cis-1,4-bond at least 80% and an average chain length of cis-1,4-bond of not less than 110, and (B) 10-90% by weight of random styrene-butadiene copolymer rubber obtained by copolymerization in the presence of an organic metal catalyst and having a content of bound styrene of not more than 40% by weight and a content of 1,2-bond in total butadiene unit of 30-95%.Type: GrantFiled: January 27, 1984Date of Patent: May 7, 1985Assignees: Bridgestone Tire Company Limited, Japan Synthetic Rubber Co., Ltd.Inventors: Mitsuhiko Sakakibara, Masao Yoshizawa, Masaki Ogawa, Yasushi Hirata, Shigeru Tomihira
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Patent number: 4510291Abstract: A rubber composition for tire treads having improved wear resistance and wet grip property without impairing rolling resistance, comprising two different specific styrene-butadiene copolymer rubbers and a specific polybutadiene rubber as the rubber ingredients in specific mixing ratios.Type: GrantFiled: September 7, 1983Date of Patent: April 9, 1985Assignee: The Yokohama Rubber Co., Ltd.Inventor: Kinya Kawakami
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Patent number: 4499228Abstract: A rubber composition having an improved crack growth resistance is disclosed, which contains 1-40 wt % of granular bodies having an average particle diameter of 5-500 .mu.m, which contain 2-40 wt % of micro short fibers having an average diameter of not more than 1 .mu.m, an average length of 1-30 .mu.m and an aspect ratio of not less than 8 and orientated in uniaxial or biaxial direction, and is random in the orientation axis of the micro short fiber between the granular bodies.Type: GrantFiled: June 23, 1983Date of Patent: February 12, 1985Assignee: Bridgestone Tire Company LimitedInventors: Masaki Ogawa, Yasushi Hirata, Akira Tsuchikura
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Patent number: 4487892Abstract: A rubber composition for use in tires is disclosed, which comprises 1-30% by weight of a non-crystallizable resinous polymer having Tg of not less than 110.degree. C. and 70-99% by weight of at least one rubber selected from styrene-butadiene copolymer rubber containing not more than 60% by weight of bound styrene, natural rubber, polybutadiene rubber having 1,4-configuration of not less than 80%, polybutadiene rubber having 1,2-configuration of not less than 50%, butyl rubber, halogenated butyl rubber and polyisoprene rubber having cis-1,4-configuration of not less than 90%.Type: GrantFiled: March 30, 1983Date of Patent: December 11, 1984Assignees: Bridgestone Tire Co., Ltd., Japan Synthetic Rubber Co., Ltd.Inventors: Toshio Ohmori, Mineo Yamamoto
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Patent number: 4485205Abstract: Rubber compositions for tires having low rolling resistance and excellent running stability consist mainly of a rubber blend consisting of 10-90% by weight of a high vinyl amorphous butadiene-styrene copolymeric rubber obtained by copolymerizing styrene with 1,3-butadiene and containing 3-30% by weight of bonded styrene and not less than 60% by weight of 1,2-bond in butadiene unit, and 90-10% by weight of a dienic rubber having a glass transition temperature of lower than -60.degree. C.Type: GrantFiled: November 29, 1982Date of Patent: November 27, 1984Inventors: Tatsuo Fujimaki, Tomoharu Yamada, Keiko Katayama, Seisuke Tomita
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Patent number: 4481995Abstract: A pneumatic radial tire having sidewalls, the rubber composition of said sidewalls comprising, based on 100 parts by weight of rubber, 20 to 90 parts by weight of butadienepiperylene copolymer and 80 to 10 parts by weight of at least one rubbery diene polymer selected from the group consisting of natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, butadiene-styrene copolymer rubber, ethylenepropylene-diene ternary copolymer rubber and acrylonitrile-butadiene copolymer rubber.Type: GrantFiled: September 14, 1982Date of Patent: November 13, 1984Assignee: Bridgestone Tire Co., Ltd.Inventors: Masaki Ogawa, Yasushi Hirata, Tatsuo Fujimaki, Tomoharu Yamada, Seisuke Tomita
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Patent number: 4482678Abstract: A diene rubber composition comprising as a main rubber component an elastomeric polymer having a glass transition temperature of not less than -50.degree. C. selected from the group consisting of a butadiene homopolymer and a copolymer of butadiene and an aromatic vinyl compound, said elastomeric polymer being one prepared by a solution polymerization method and not less than 40% by weight to less than 65% by weight of the polymer chains thereof being branched polymer chains formed by coupling the polymer molecules with each other with a trifunctional or tetrafunctional coupling agent. The composition has excellent rolling resistance characteristic, wet grip characteristic, processability, tear strength and tackiness, and is suitable particularly for use in the tread portion of tires.Type: GrantFiled: August 23, 1983Date of Patent: November 13, 1984Assignees: Sumitomo Rubber Industries, Ltd., Sumitomo Chemical Company, LimitedInventors: Hiroshi Furukawa, Yuichi Saito, Akio Imai, Nobuyuki Yoshida, Yasushi Okamoto
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Rubber compositions and articles thereof having improved metal adhesion and metal adhesion retention
Patent number: 4480066Abstract: Vulcanizable rubber compositions and articles such as tires having improved metal adhesion and metal adhesion retention to brass and brass-plated metallic reinforcement. The improvement comprises substituting at least about 10.0 parts by weight of a halogenated rubber for non-halogenated rubber present in the vulcanizable rubber composition. The non-halogenated rubber can be natural or synthetic or blends thereof. A method for improving the metal adhesion and metal adhesion retention between a vulcanizable rubber and brass or brass-plated metallic reinforcement includes the steps of blending at least about 10.0 parts by weight of a halogenated rubber with up to about 90.0 parts by weight of a vulcanizable rubber essentially free of other halogenated rubber and curing the blend of rubbers with the brass or brass-plated metallic reinforcement embedded therein.Type: GrantFiled: August 18, 1983Date of Patent: October 30, 1984Assignee: The Firestone Tire & Rubber CompanyInventors: James A. Davis, Robert C. Koch -
Patent number: 4471093Abstract: A rubber composition having improved rolling resistance and wet grip characteristics with improved processability, abrasion resistance and durability which contains as a rubber component a mixture of a high molecular weight styrene-butadiene rubber having a specific microstructure and a low molecular weight styrene-butadiene and/or butadiene rubber having a specific microstructure. The composition is particularly suitable for use in tread of tires.Type: GrantFiled: February 28, 1983Date of Patent: September 11, 1984Assignees: Sumimoto Rubber Industries, Ltd., Sumitomo Chemical Company, LimitedInventors: Hiroshi Furukawa, Yuichi Saito, Keisaku Yamamoto, Akio Imai, Nobuyuki Yoshida, Yasushi Okamoto
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Patent number: 4468496Abstract: A rubber composition having excellent fracture properties and cut growth resistance is disclosed, which consists of 10-95 parts by weight of polybutadiene having a content of cis-1,4 bond of at least 70% and an average chain length of 1,4-sequence of 110-450 and 90-5 parts by weight of at least one diene rubber.Type: GrantFiled: July 26, 1982Date of Patent: August 28, 1984Assignees: Bridgestone Tire Co., Ltd., Japan Synthetic Rubber Co., Ltd.Inventors: Yasumasa Takeuchi, Mitsuhiko Sakakibara, Nobuo Tagata, Masaki Ogawa, Yasushi Hirata, Shigeru Tomihira
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Patent number: 4467060Abstract: A heterogeneous rubber composition having good air impermeability is made by mixing together separate fractions of rubbers and fillers.Type: GrantFiled: January 24, 1983Date of Patent: August 21, 1984Assignee: The B. F. Goodrich CompanyInventor: Biing-Lin Lee
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Patent number: 4464500Abstract: A polymeric composition containing butyl rubber, and/or bromobutyl rubber, and/or chlorobutyl rubber; a EPDM polymer, and polyethylene; and use thereof to prepare molded, cured, flexible bulbs are provided.Type: GrantFiled: August 9, 1983Date of Patent: August 7, 1984Inventors: Jeffrey Diamond, David S. Winkler
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Patent number: 4454304Abstract: The method of producing a rubber compound having high green strength comprising providing separate rubber components one of which contains a tertiary amine component bound therein and the other of which contains a halogen cross linking agent bound therein, and blending the two rubber components to form a rubber blend having high green strength.Type: GrantFiled: April 22, 1981Date of Patent: June 12, 1984Assignee: Copolymer Rubber & Chemical Corp.Inventor: Tom C. H. Tsai
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Patent number: 4433107Abstract: A rubber composition having improved cut growth resistance, processability and dimensional stability is disclosed, which comprises not less than 20 parts by weight of polyisoprene having a melting point of not less than 10.degree. C. and a content of cis-1,4 bond of not less than 88% and the balance of at least one diene rubber.Type: GrantFiled: August 3, 1982Date of Patent: February 21, 1984Assignee: Bridgestone Tire Co., Ltd.Inventors: Yasumasa Takeuchi, Mitsuhiko Sakakibara, Nobuo Tagata, Masaki Ogawa, Yasushi Hirata, Shigeru Tomihira
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Patent number: 4427831Abstract: A rubber material having an excellent grip on ice comprising a mixture of an ordinary rubber and a powdered polymer, said powdered polymer having a maximum of tan .delta. at a temperature in the range of -5.degree. C. to +35.degree. C. when the tan .delta. is measured by a nonresonance, forced vibration apparatus at a frequency of 110 hertz and a heating rate of 2.degree. C./minute.Type: GrantFiled: July 30, 1981Date of Patent: January 24, 1984Assignee: Nippon Zeon Co. Ltd.Inventors: Keiji Komuro, Akio Ueda
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Patent number: 4424295Abstract: A carbon reinforced, partially cross-linked butyl rubber matrix sealant composition as described is particularly suitable for use as a self-healing tire puncture sealant. The sealant composition comprises a high average molecular weight butyl rubber and a low average molecular weight butyl rubber in a ratio of high to low molecular weight butyl rubber of between about 20/80 to 60/40, in admixture with a tackifier present in an amount between about 55 and 70 weight % of the composition. A partially hydrogenated block copolymer may be included in the admixture.Type: GrantFiled: April 5, 1982Date of Patent: January 3, 1984Assignee: Rockcor, Inc.Inventors: Joel V. Van Ornum, Peter L. Stang
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Patent number: 4414363Abstract: A rubber composition comprising as main components (1) at least one rubber having a glass transition temperature of from -45.degree. C. to 0.degree. C. and selected from the group consisting of an isoprene-butadiene copolymer rubber and polyisoprene rubber and (2) at least one rubber selected from the group consisting of natural rubber and cis-1,4-polyisoprene rubber having a cis-1,4-linkage content of at least 90 mole %, said composition having a value, defined by the following formula, of at least 10,[(R-53)+(S-100)]wherein R is a rebound (%) measured at 51.degree. C. by a Dunlop Tripso meter for a vulcanized product of said rubber composition, and S, as defined in the specification, is a wet skid resistance index on a road surface defined by ASTM E-303-74 which is determined at 19.degree. C. by a portable skid tester for a vulcanized product of said rubber composition.Type: GrantFiled: June 16, 1982Date of Patent: November 8, 1983Assignee: Nippon Zeon Co. Ltd.Inventors: Shuichi Akita, Takeshi Chida, Hiroyuki Watanabe, Akio Ueda
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Patent number: 4405756Abstract: A rubber composition co-vulcanizable with a sulfur cure system, said composition comprising(1) 95 to 20% by weight of a partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of units derived from the conjugated diene are hydrogenated,(2) 5 to 80% by weight of an ethylenepropylene-nonconjugated diene terpolymer rubber, and(3) a required amount of at least one vulcanization accelerator selected from the group of thiuram accelerators and dithiocarbamate accelerators.Type: GrantFiled: August 25, 1982Date of Patent: September 20, 1983Assignee: Nippon Zeon Co., Ltd.Inventors: Motofumi Oyama, Kinro Hashimoto
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Patent number: 4400488Abstract: The green strength of compositions containing elastomers and/or up to 100 percent of reclaimed rubber is improved by the addition of crystalline or semi-crystalline butene polymers selected from the group consisting of polybutene and interpolymers made from 1-butene with at least one monomer selected from the group consisting of alpha-olefins, non-conjugated dienes, and non-conjugated polyenes. Although reclaimed rubbers are utilized, an unexpected increase in green strength of an unvulcanized blend is obtained. The reclaimed rubbers utilized in the blend may be those which have been devulcanized by mechanical energy, heat, and/or chemical agents. Additionally and preferably, the rubbers may be reclaimed through the use of microwave energy.Type: GrantFiled: April 28, 1982Date of Patent: August 23, 1983Assignee: The Goodyear Tire & Rubber CompanyInventors: Joginder Lal, Sandra J. Walters
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Patent number: 4398582Abstract: A pneumatic tire having remarkably low rolling resistance and high wet skid resistance without deteriorating the wear resistance is obtained by using in at least the ground-contact area of its tread, a rubber composition consisting essentially of 100 parts by weight of a mixed elastomer and 40-80 parts by weight of carbon black, the mixed elastomer consisting of 10-60 parts by weight of a solution-polymerized styrene-butadiene copolymer rubber having a bonded styrene content of 5-30% by weight and a trans-1,4 content in butadiene unit of not more than 45% by weight; 10-50 parts by weight of an emulsion-polymerized styrene-butadiene copolymer rubber having a bonded styrene content of 30-50% by weight; and 0-80 parts by weight of at least one rubber having a glass transition temperature of not higher than -50.degree. C.Type: GrantFiled: May 5, 1981Date of Patent: August 16, 1983Assignee: Bridgestone Tire Company LimitedInventors: Kazuaki Yuto, Toru Oniki, Nobumasa Ikeda, Itsuo Miyake
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Patent number: 4395501Abstract: A process is provided for the production of vulcanizates having improved properties wherein polymer (or polymers) is mixed with carbon black in two separate steps such that in one step a major proportion of the carbon black to be used is mixed with polymer and in a second step a zero to minor proportion of the carbon black to be used is mixed with polymer. Such improved vulcanizates may be used, for example, in tires or a variety of mechanical goods.Type: GrantFiled: August 4, 1981Date of Patent: July 26, 1983Assignee: Polysar LimitedInventors: George J. Briggs, Yung-Kang Wei
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Patent number: 4394473Abstract: Bales of unvulcanized rubber, vulcanized rubber or compounding ingredients for unvulcanized rubber are packaged in film or bags made from syndiotactic 1,2-polybutadiene (1,2-SBD) containing at least one antiblock agent additive and at least one slip agent additive. Coextrusion can be used to manufacture bags or film having two or more layers where only the inside layer is heavily loaded with antiblock additives and the outside layer contains only a minimal amount of antiblock additives with both layers containing slip agents. The use of 1,2-SBD serves to eliminate the problems of incompatibility and disposal encountered in the prior art and provides film and bags having superior puncture and tear resistance when compared to a conventional material such as polyethylene.Type: GrantFiled: October 6, 1981Date of Patent: July 19, 1983Assignee: The Coca-Cola CompanyInventors: John P. Winter, Mladomir Tomic
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Patent number: 4391942Abstract: There is disclosed a rubber composition having excellent vibration-insulating properties. The rubber composition comprises 45 to 75 parts by weight of at least one rubber selected from the group consisting of natural rubber, isoprene rubber, butadiene rubber and styrene-butadiene rubber; 40 to 20 parts by weight of halogenated butyl rubber; 5 to 15 parts by weight of copolymer having a styrene content of not less than 50%; 20 to 80 parts by weight of carbon black based on 100 parts by weight of the total of the above rubbers and copolymer; and 3 to 25 parts by weight of aromatic process oil based on 100 parts by weight of the total of the above rubbers and copolymer.Type: GrantFiled: April 6, 1982Date of Patent: July 5, 1983Assignee: Bridgestone Tire Co., Ltd.Inventors: Hideo Nakauchi, Shingo Kato, Yukio Ando
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Patent number: 4384066Abstract: A neutralized sulfonated EPDM terpolymer is rendered amenable to adhesion utilizing typical foot sole primer/adhesive systems by incorporating into the sulfonated EPDM a syndiotactic 1,2-polybutadiene. The composition preferably includes process oils; inorganic fillers and preferential plasticizers for the neutralized sulfonated EPDM terpolymer.Type: GrantFiled: August 13, 1981Date of Patent: May 17, 1983Assignee: Uniroyal, Inc.Inventor: Francis X. O'Shea
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Patent number: 4383085Abstract: A rubber composition for tire having low rolling resistance and high wet skid resistance, breakage strength and wear resistance consists mainly of a rubber component containing at least 20 parts by weight of a high vinyl butadiene-styrene copolymer rubber obtained by copolymerizing randomly styrene with 1,3-butadiene, and containing 3-30% by weight of bonded styrene and 60-95% by weight of 1,2-bond in butadiene unit, and further containing metal-butadienyl bonds in its main chain in a weight fraction of at least 20% by weight.Type: GrantFiled: September 16, 1981Date of Patent: May 10, 1983Assignee: Bridgestone Tire Co., Ltd.Inventors: Tatsuo Fujimaki, Shinsuke Yamaguchi, Tomoharu Yamada, Seisuke Tomita
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Patent number: 4373069Abstract: Tires having good grip on wet road surfaces and low frictional resistance to rolling on the road surface have treads formed from vulcanisates of elastomer compositions comprising a major component consisting of one or more polymers having a glass transition temperature (Tg) of minus 50.degree. C. or lower temperature, and a minor component consisting of one or more polymers having a glass transition temperature of ambient temperature or higher temperature. The major component can consist of one or more rubbery polymers selected from natural rubbers, polybutadienes synthetic polyisoprenes and rubbery styrene-butadiene copolymers; and the minor component can consist of a resinous styrene-butadiene co-polymer.Type: GrantFiled: August 28, 1979Date of Patent: February 8, 1983Assignee: Dunlop LimitedInventors: Robert Bond, Robert J. Blythe
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Patent number: 4370432Abstract: This invention relates to hot melt adhesive compositions which includes a neutralized sulfonated elastomeric polymer having about 5 to about 50 meq. of neutralized sulfonate groups per 100 grams of the neutralized sulfonated elastomeric polymer, about 25 to about 250 parts by weight of a polyisobutylene per 100 parts of the neutralized sulfonated elastomeric polymer, and about 25 to about 250 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, aliphatic dienes and mono and diolefins, cyclic olefins of 5 or 6 carbon atoms and hydrogenated poly cyclics per 100 parts by weight of the neutralized sulfonated EPDM terpolymer.Type: GrantFiled: September 4, 1981Date of Patent: January 25, 1983Assignee: Exxon Research and Engineering Co.Inventors: Pawan K. Agarwal, Robert D. Lundberg