Contains Non-transition Elemental Metal, Hydride Thereof, Or Carbon To Non Transition Metal Atom Bond Patents (Class 526/136)
  • Patent number: 5432139
    Abstract: Processes for the formulation of Ziegler-type catalysts from a transition metal component, an electron donor and a co-catalyst which are sequentially mixed together. The co-catalyst is initially contacted with either of the transition metal catalyst or the electron donor for a first contact time of 5-120 seconds. This mixture is then contacted with the remainder of the electron donor or transition metal component for a second contact time of less and 110 seconds. The three component system is then used in olefin polymerization. The olefin contacting step can involve an initial pre-polymerization reaction. A specific order of addition involves mixture of the transition metal component and the co-catalyst component for a contact time of 5-120 seconds followed by contact with an electron donor component for no more than 30 seconds. Another order of addition involves initially contacting the electron donor with the co-catalyst.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: July 11, 1995
    Assignee: Fina Technology, Inc.
    Inventors: Edwar S. Shamshoum, David J. Rauscher, Shabbir A. Malbari
  • Patent number: 5405815
    Abstract: The subject invention relates to a technique for synthesizing rubbery non-tapered, random, copolymers of 1,3-butadiene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire sidewall rubber compounds for truck tires. By utilizing these isoprene-butadiene rubbers in tire sidewalls, tires having improved cut growth resistance can be built without sacrificing rolling resistance. Such rubbers can also be employed in tire tread compounds to improve tread wear characteristics and decrease rolling resistance without sacrificing traction characteristics.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: April 11, 1995
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Anthony J. Bell, Barry A. Matrana, Adel F. Halasa
  • Patent number: 5403904
    Abstract: A process is disclosed for preparation of telechelic difunctional unsaturated oligomers and polymers having at least one internal carbon-to-carbon double bond wherein the functional groups are terminal reactive groups. The reactants are acyclic polyenes with terminal carbon-to-carbon double bonds and olefins with at least one functional group. The polymerization process is substantially free of side reactions comprising double bond migration and cyclization. The telechelic difunctional unsaturated oligomers and polymers have a functionality of about 2 and are suitable for preparation of block copolymers, ion exchange resins, adhesives, and flocculants and for further functionalization.
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: April 4, 1995
    Assignee: Amoco Corporation
    Inventors: Philip O. Nubel, Robert B. Morland, Howard B. Yokelson
  • Patent number: 5376612
    Abstract: Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or chromium pyrrolide, compounds can be used either unsupported or supported on an inorganic oxide support, with a metal alkyl and an unsaturated hydrocarbon, to trimerize, oligomerize, and/or polymerize olefins.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: December 27, 1994
    Assignee: Phillips Petroleum Company
    Inventors: William K. Reagen, Ted M. Pettijohn, Jeffrey W. Freeman
  • Patent number: 5225503
    Abstract: The present invention is intended for the preparation of a cycloolefin random copolymer, which is a copolymer of ethylene, cycloolefin and if necessary .alpha.-olefin, in a high yield. The process for preparing a cycloolefin random copolymer according to the invention is a process for preparing a cycloolefin random copolymer comprising repeating units derived from (i) ethylene in an amount of 40 to 97% by mol, repeating units derived from (ii) cycloolefin in an amount of 3 to 60% by mol and repeating units derived from (iii) .alpha.-olefin of 3-20 carbon atoms in an amount of 0 to 20% by mol, wherein (i) ethylene, (ii) cycloolefin and if necessary (iii) .alpha.-olefin of 3-20 carbon atoms are copolymerized in a liquid phase in the presence of a catalyst formed from (A) a soluble vanadium compound having a tertiary alkoxy group or .beta.-diketone as a ligand and (B) an organoaluminum compound represented by the formula (i-Bu) .sub.n AlCl.sub.3-n wherein n is 1.0 to 2.5.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: July 6, 1993
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Toshihiro Sagane, Hideaki Yamaguchi
  • Patent number: 5179180
    Abstract: The polymerization of certain alpha-olefins in a gas phase involves the problem of agglomeration of the product into particles disadvantageous from the viewpoint of its handling. In the present invention this problem has been solved by means of a new type of process for the homo- or copolymerization of alpha-olefins. In the process the catalyst system is pretreated by contacting and reacting a transition-metal compound which is solid or on a solid carrier with an organoaluminum compound, and possibly an electron donor, in a liquid medium, and by drying the thus formed reaction product to produce a solid catalyst system. The thus pretreated solid and active catalyst system is then fed together with an alpha-olefin in the gaseous state into a gas-phase reactor, and polymerization is carried out by contacting them with each other.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: January 12, 1993
    Assignee: Berggren OY AB
    Inventors: Antero Ahvenainen, Hannu Salminen, Jari Tervonen, Tarja Soderberg
  • Patent number: 5155197
    Abstract: A copolymer of trans-1,4-hexadiene and propylene, and a method for its preparation. The copolymer is isotactic, essentially free of cis-1,4-hexadiene, and contains from 0.01 to 5 mole percent 1,4-hexadiene. The copolymer is radiation-stabilized against molecular weight degradation, and cross-links to form gel upon exposure to radiation. The copolymer is prepared by contacting a mixture of propylene and 1,4-hexadiene essentially free of cis-1,4-hexadiene with a coordination catlyst, e.g. Ziegler-Natta catalyst, under copolymerization conditions. Hydrogen is used to moderate the molecular weight of the copolymer and enhance the catalyst activity.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: October 13, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Richard G. Austin, Bradley P. Etherton
  • Patent number: 5134209
    Abstract: Ethylene-propylene rubbery copolymers having a high degree of random polymerization are produced by employing a high activity, stereoregular polymerization catalyst comprising a titanium halide-containing procatalyst, an organoaluminum compound cocatalyst and a moderately hindered aromatic nitrogen heterocycle as selectivity control agent. The ethylene-propylene copolymer has good properties and exhibits improved processability.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: July 28, 1992
    Assignee: Shell Oil Company
    Inventors: Robert C. Job, Larry L. Sterna
  • Patent number: 5086132
    Abstract: A process for the polymerization of a liquid alpha-olefin or a solution of two or more alpha-olefins and, optionally, one or more diolefinswherein the sole process medium is one or more of the said olefins in liquid formcomprising:(a) admixing the liquid alpha-olefin or the solution with an inert particulate material having a mean particle size in the range of about 0.01 to about 10 microns in an amount of at least about 0.005 percent by weight of particulate material based on the total weight of the resin and particulate material in the final product; and(b) contacting the mixture formed in step (a) with a catalyst system adapted to polymerize the olefin(s) in the mixture at a temperature and pressure sufficient to (i) provide polymerization conditions; (ii) maintain the olefin(s) in the liquid phase throughout the polymerization; and (iii) maintain the polymer product in its sticky phase.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: February 4, 1992
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: William H. Joyce
  • Patent number: 4897456
    Abstract: Disclosed is a method of reducing the activation rate of an alkyl aluminum activator in the metathesis polymerization of polycyclic cycloolefins. Activation rate is reduced by use of a bidentate Lewis base as the reaction rate moderator.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: January 30, 1990
    Assignee: Hercules Incorporated
    Inventor: Lawrence L. Nelson
  • Patent number: 4690990
    Abstract: In accordance with one embodiment of this invention, a bis-(cyclopentadienyl)chromium(II) compound is introduced onto an activated phosphate-containing support and utilized in conjunction with an organometal cocatalyst, such as an alkylaluminum. In accordance with another embodiment of this invention, a phosphate-containing xerogel is formed by removing water from an aluminum phosphate-containing hydrogel by means of azeotropic distillation or washing with a volatile, water miscible organic compound, activated and thereafter a bis-(cyclopentadienyl)chromium(II) compound is incorporated therewith. In other embodiments of this invention, a phosphate-containing support is formed by forming aluminum phosphate from an aluminum alkoxide or from a melt, or by phosphating silica or alumina, or by forming an aluminum phosphate/silica combination. A support thus formed is activated and a bis-(cyclopentadienyl)chromium(II) compound added.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: September 1, 1987
    Assignee: Phillips Petroleum Company
    Inventors: Max P. McDaniel, James N. Short
  • Patent number: 4579920
    Abstract: A process for producing polybutadiene of a high degree of polymerization having high 1,2 and cis-1,4 microstructure contents and a low trans-1,4 microstructure content, which comprises polymerizing 1,3-butadiene in the presence of a catalyst system composed of(1) a halogen-containing organoaluminum compound,(2) (a) a cobalt dithiocarbamate compound or (b) the reaction product of carbon disulfide, a secondary amine and a cobalt compound, and(3) water.The polybutadiene has for example(A) a 1,2 microstructure content of 7 to 50%,(B) a cis-1,4 microstructure content of at least 50%,(C) a trans-1,4-microstructure content of at most 5%,(D) an inherent viscosity, measured in toluene at 30.degree. C., of at least 1, and(E) a gel content of at most 0.3%.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: April 1, 1986
    Assignee: UBE Industries, Ltd.
    Inventors: Nobuhiro Tsujimoto, Michinori Suzuki, Norishige Kawaguchi, Tetuzi Nakazima
  • Patent number: 4577001
    Abstract: Olefins are polymerized in the presence of catalysts prepared from titanium compounds prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aliphatic hydroxyl group.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: March 18, 1986
    Assignee: The Dow Chemical Company
    Inventors: William M. Coleman, III, Morris S. Edmondson
  • Patent number: 4507451
    Abstract: A process of preparing a bimodal or multimodal homopolymer of a conjugated diene or a bimodal or multimodal copolymer of a conjugated diene with another conjugated diene or with a vinyl aromatic compound consists in polymerizing the monomer(s) in a reaction medium at a temperature of between 20.degree. C. and 200.degree. C. in the presence of a catalyst system formed of the reaction product of:(a) an organic compound of a metal of group 3A of the periodic classification of elements of the Mendeleev Table having one of the following formulas;M.sup.1 M.sup.3 R.sup.1 R.sup.2 R.sup.3 R.sup.4M.sup.2 (M.sup.3 R.sup.1 R.sup.2 R.sup.3 R.sup.4).sub.2M.sup.3 R.sup.1 R.sup.2 R.sup.3M.sup.1 OM.sup.3 R.sup.1 R.sup.2with (b) at least one electron-donor compound containing at least one heteroatom,and adding to the reaction medium during the course of the polymerization reaction a compound of a transition metal of groups 1b to 7B and 8 or a magnesium compound of the general formula Mg(A).sub.2.
    Type: Grant
    Filed: December 8, 1983
    Date of Patent: March 26, 1985
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Christian Freppel
  • Patent number: 4503202
    Abstract: Polybutadiene consisting of from 5% to 30% by weight of a boiling n-hexane-insoluble fraction and from 70% to 95% by weight of a boiling n-hexane-soluble fraction and having enhanced mechanical strength is prepared by polymerizing 1,3-butadiene in a polymerization solvent in the presence of a specific catalyst consisting essentially of (A) a cobalt compound catalytic component soluble in the polymerization solvent; (B) an organic aluminum halide catalytic component; (C) a trialkyl aluminum-water reaction product in catalytic component, and (D) a catalytic component consisting of carbon disulfide and/or phenyl isothiocyanate, and by isolating the resultant polybutadiene from the reaction mixture.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: March 5, 1985
    Assignee: UBE Industries, Ltd.
    Inventors: Haruo Ueno, Hidetomo Ashitaka, Koichi Nakajima
  • Patent number: 4501867
    Abstract: A 1,2-polymerization of 1,3-butadiene is carried out in a polymerization solvent in the presence of a 1,2-polymerization catalyst consisting essentially of a cobalt compound soluble in the polymerization solvent, an organic aluminum halide, an organic magnesium compound, and carbon disulfide and/or phenyl isothiocyanate and in the presence or absence of a cis-1,4-polymerization product of 1,3-butadiene.
    Type: Grant
    Filed: October 7, 1983
    Date of Patent: February 26, 1985
    Assignee: Ube Industries, Ltd.
    Inventors: Haruo Ueno, Hidetomo Ashitaka, Koichi Nakajima
  • Patent number: 4463146
    Abstract: This invention reveals a very useful process for producing polybutadiene composed essentially of syndiotactic 1,2-polybutadiene in tetrahydrofuran comprising polymerizing 1,3-butadiene in said tetrahydrofuran in the presence of (1) a catalyst composition microencapsulated in a polyene product which contains (a) at least one cobalt compound selected from the group consisting of (i) .beta.-diketone complexes of cobalt, (ii) .beta.-keto acid ester complexes of cobalt, (iii) cobalt salts of organic carboxylic acids having 6 to 15 carbon atoms, and (iv) complexes of halogenated cobalt compounds of the formula CoX.sub.n, wherein X represents a halogen atom and n represents 2 or 3, with an organic compound selected from the group consisting of tertiary amines, alcohols, tertiary phosphines, ketones and N,N-dialkylamides, and (b) at least one organoaluminum compound of the formula AlR.sub.3, wherein R represents a hydrocarbon radical of 1 to 6 carbon atoms; and (2) carbon disulfide.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: July 31, 1984
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Ken W. Donbar, John J. Barbour, James N. Henderson, Anthony J. Bell
  • Patent number: 4460757
    Abstract: A process for producing highly crystalline .alpha.-olefin polymers of good particle form with high yield is provided, which comprises polymerizing .alpha.-olefin in the presence of a preactivated catalyst obtained by reacting a reaction product (I) of organoaluminum compound (A.sub.1) with electron donor (B.sub.1), with TiCl.sub.4 to obtain a solid product (II); further reacting (II) with electron donor (B.sub.2) and electron acceptor to obtain a solid product (III); during or/and after the reaction step for obtaining (II) or/and during or/and after the reaction step for obtaining (III), subjecting (II) or (III), to polymerization treatment with .alpha.-olefin; and combining the resulting final solid product with organo-aluminum compound (A.sub.2) and a reaction product (G) of organo-aluminum compound (A.sub.3) with electron donor (B.sub.3) to obtain a preactivated catalyst; and preferably, in this combination, further subjecting a part or the total of the catalyst to polymerization treatment with .alpha.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: July 17, 1984
    Assignee: Chisso Corporation
    Inventors: Akihiro Sato, Masami Tachibana, Toshihiro Uwai, Kenji Matsuda, Yoshiharu Higuchi
  • Patent number: 4258168
    Abstract: In an alpha-olefin polymerization process using a transition metal halide-aluminum alkyl catalyst system, addition of minor, effective amounts of alkyl orthoformates, thiophosphates and borates decreases the amount of low molecular weight or amorphous polymer produced.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: March 24, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: Nicholas M. Karayannis, Sam S. Lee
  • Patent number: 4256866
    Abstract: In an alpha-olefin polymerization process using a transition metal halide-aluminum alkyl catalyst system, addition of minor, effective amounts of a sterically hindered 5- or 6-membered cyclic ether decreases the amount of low molecular weight or amorphous polymer produced.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: March 17, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: Nicholas M. Karayannis, Sam S. Lee
  • Patent number: 4255281
    Abstract: Process for modifying a titanium trichloride-organoaluminum alpha-olefin polymerization catalyst to reduce production of alkane soluble products during polymerization of alpha-olefins in the presence of such catalyst without substantial decreases in catalyst activity, said process comprising combining in an inert diluent and in the substantial absence of catalyst poisons, components comprising an alkylaluminum component, a titanium trichloride, hydrogen sulfide or a bis-(trialkyltin)sulfide, a tertiary amine, and an aromatic dicarbonyl compound selected from the group consisting of dialdehydes and lower alkyl diesters of ortho-, para- and meta-phthalic acids. Polyalpha-olefins containing reduced levels of low molecular weight and amorphous components are produced by contacting the catalysts with at least one polymerizable alpha-olefin under polymerizing conditions.
    Type: Grant
    Filed: July 3, 1979
    Date of Patent: March 10, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: John B. Rogan, Charles K. Buehler
  • Patent number: 4189556
    Abstract: In an alpha-olefin polymerization process using a transition metal halide-aluminum alkyl catalyst system, addition of minor, effective amounts of aromatic amines or amine N-oxides substituted with electron withdrawing groups decreases the amount of low molecular weight or amorphous polymer produced.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: February 19, 1980
    Assignee: Standard Oil Company (Indiana)
    Inventors: Nicholas M. Karayannis, Sam S. Lee
  • Patent number: 4153767
    Abstract: Butadiene polymers containing 70% or more of 1,2-structure and a relatively low melting point are produced by polymerizing 1,3-butadiene in the presence of a catalyst which has been prepared by admixing (A) an organic solvent solution containing 1,3-butadiene, a cobalt compound and an organoaluminium compound; (B) an amide compound of the formula (2) or (3): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are respectively an H atom, aliphatic hydrocarbon radical of 1 to 7 carbon atoms or aromatic hydrocarbon radical of 6 or 7 carbon atoms, R.sub.3 is H or an aliphatic hydrocarbon radical of 1 to 3 carbon atoms and n is 2 to 5, and; (C) carbon disulfide.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: May 8, 1979
    Assignee: Ube Industries Limited
    Inventors: Haruo Ueno, Kyohei Oizumi, Hideo Ishikawa, Kohei Nakajima, Nobuhiro Tsujimoto, Osamu Kimura, Hideyuki Aikawa
  • Patent number: 4115319
    Abstract: New catalyst components comprising compounds containing titanium, magnesium and halogens, and catalysts for polymerizing olefins obtained by mixing said components with organometallic Al compounds are disclosed.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: September 19, 1978
    Assignee: Montedison S.p.A.
    Inventors: Umberto Scata, Luciano Luciani, Pier Camillo Barbe
  • Patent number: 4111836
    Abstract: A process is described herein for improving the soluble polymer production of, while maintaining substantially the same crystalline polymer yield of, a high surface area, large porosity, brown catalyst component comprising beta titanium trichloride and some of at least one organic electron pair donor compound, which component is prepared by (a) organoaluminum compound reduction of titanium tetrachloride followed by (b) incorporation of the reduced solid with said donor compound and thereafter (c) treatment with titanium tetrachloride. The improved process comprises treatment at ambient temperature or somewhat above with an additional organic electron pair donor compound such as an ester, an amine, an organic borate or a coordinating, cyclic hydrocarbon containing at least one double bond, etc., after (b) or (c) above and prior to use of said component in polymerization.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: September 5, 1978
    Assignee: Standard Oil Company (Indiana)
    Inventors: Nicholas M. Karayannis, Harold Grams
  • Patent number: 4080491
    Abstract: A process of producing a ring-opening polymerization product of a norbornene derivative containing at least one polar group or aromatic group, a norbornadiene derivative containing at least one of said groups or a cycloolefin using a catalyst system prepared from an organometallic compound and the reaction product of tungsten oxide or molybdenum oxide and a phosphorus pentahalide or phosphorus oxytrihalide or these compounds and other third components. The catalyst system possesses a high polymerization activity.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: March 21, 1978
    Assignee: Showa Denko K.K.
    Inventors: Yukio Kobayashi, Takashi Ueshima, Shoichi Kobayashi
  • Patent number: 4072809
    Abstract: Novel catalysts and processes are disclosed for producing highly crystalline polypropylene and highly crystalline copolymers of propylene with ethylene or propylene with other alpha-olefins. Such catalysts can reduce the amount of low-molecular-weight and, particularly, amorphous polymers formed without serious effect on the polymerization yield. These novel catalysts and processes involve improving an alkylaluminum compound-titanium chloride catalyst by using in combination small amounts of hydrogen sulfide and a sterically hindered, lower alkyl substituted, cyclic, tertiary amine, a sterically hindered, lower alkyl substituted, cyclic, amine oxide, or a trihydrocarbylphosphite. Such catalyst systems are useful in slurry polymerization, bulk polymerization and techniques in which polymerization is accomplished utilizing monomer substantially in the vapor phase.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: February 7, 1978
    Assignee: Standard Oil Company (Indiana)
    Inventor: John B. Rogan
  • Patent number: 4072808
    Abstract: A process for producing an elastomer comprising selected copolymerized C.sub.5 -hydrocarbons from a hydrocarbon mixture containing C.sub.5 -monoolefinic hydrocarbons, C.sub.5 -diolefinic hydrocarbons (cyclic and acyclic) C.sub.5 -paraffins, C.sub.6 -aliphatics and benzene which comprises separating the C.sub.5 -hydrocarbons from the mixture and copolymerizing a selected portion of the resulting C.sub.5 -hydrocarbon mixture in the presence of a catalyst system to form an elastomer. The elastomers produced are suitable for use in adhesive compositions in general but particularly useful as a component in pressure sensitive adhesive compositions.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: February 7, 1978
    Assignee: Gulf Research & Development Company
    Inventors: Pallavoor R. Lakshmanan, Harold E. Swift, Ching Y. Wu
  • Patent number: 4053697
    Abstract: A process for producing a homopolymer of propylene or a copolymer of propylene which comprises polymerizing propylene or a mixture of propylene and another unsaturated hydrocarbon monomer such as ethylene in liquid propylene, in the presence of a catalyst system consisting essentially of (a) an activated titanium compound obtained by reducing titanium tetrachloride with an organic aluminum compound and activating the resulting titanium compound and (b) an organic aluminum compound to produce a polymer slurry, introducing the polymer slurry into an upper part of a counter-current washing zone, such as a washing tower, and counter-currently contacting the polymer slurry with liquid propylene which is introduced into a lower part of the washing zone, whereby the polymer and catalyst residues dissolved in the polymer slurry are removed.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: October 11, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Mamoru Asada, Akinobu Shiga, Kiyoshi Matsuyama
  • Patent number: 4051308
    Abstract: 1,3-Butadiene is polymerized in the liquid phase in the presence of a catalyst composition comprising:A. A complex of a cobalt salt;B. AlR.sub.3 wherein R is hydrocarbon, andC. CS.sub.2.The complex comprises one of a cobalt salt, preferably CoCl.sub.2, with an organic compound containing nitrogen and oxygen or sulfur, preferably with no more than 2 carbon atoms separating the nitrogen and oxygen or sulfur, and the organometal reducing agent AlR.sub.3, wherein R is a hydrocarbon radical, preferably of no more than 10 carbon atoms. The polybutadiene has a microstructure of at least 80% and generally more than 90% 1,2, is also syndiotactic in character, has a melting point of 190.degree.-227.degree. C, and may be obtained in approximately quantitative yields.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: September 27, 1977
    Assignee: The Firestone Tire & Rubber Company
    Inventor: Adel Farhan Halasa
  • Patent number: 4048418
    Abstract: Method of polymerizing conjugated diolefinic monomers containing from 4 to about 12 carbon atoms to high molecular weight polymers by bringing said monomers into contact with a catalyst system consisting of (1) an iron-containing compound, (2) an organometallic reducing agent from Groups I and III of the Periodic Table, and (3) a nitrogen-containing ligand.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: September 13, 1977
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Morford C. Throckmorton
  • Patent number: 4028482
    Abstract: Polymers or copolymers of acid anhydride type norbornene derivatives and a method of preparing the same, said polymers or copolymers being formed with a reduced viscosity of 0.1 to 20 by ring-opening polymerization of acid anhydride type norbornene derivatives having at least one carboxylic anhydride group or a mixture of said norbornene derivatives and cycloolefins.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: June 7, 1977
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Takashi Ueshima, Yasuzi Tanaka, Shoichi Kobayashi
  • Patent number: 4011386
    Abstract: Novel polymers or copolymers of norbornene-carboxylic acid amides can be obtained by contacting, in the presence or absence of an inert solvent, (I) at least one compound selected from the group consisting of 5-norbornene-2-carboxylic acid amide, 5-norbornene-2,3-dicarboxylic acid diamide and substituted derivatives thereof, or (II) a mixture of the said compound (I) with at least one compound selected from the group consisting of norbornenes having at least one substituent selected from the group consisting of ester groups, nitrile groups, esterified hydroxyl groups, acid imide groups, halogens and acid anhydride groups and cyclic olefins, with a catalyst composed of (a) at least one compound selected from the group consisting of compounds of W, Mo and Re and (b) at least one compound selected from the group consisting of compounds of elements of Groups IA, IIA, IIB, IIIA, IVA and IVB of the Deming Periodic Table, said compounds having at least one element-carbon bond or element-hydrogen bond.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: March 8, 1977
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Shuichi Matsumoto, Ryuichi Nakamura, Seiji Fukuhara, Kazuo Suzuki, Koei Komatsu
  • Patent number: 3960765
    Abstract: A process for preparing a solid catalyst for the polymerization of olefins which comprises the steps of (1) reducing titanium tetrachloride with an organoaluminum compound, (2) treating the resulting .beta.-type titanium trichloride with a complexing agent, (3) treating the solid catalyst thus obtained with an organoaluminum compound, and (4) treating the resulting solid catalyst with a complexing agent, and a solid catalyst for the polymerization of olefins prepared by the above process.
    Type: Grant
    Filed: November 4, 1974
    Date of Patent: June 1, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Satoru Uchida
  • Patent number: RE31099
    Abstract: New catalyst components comprising compounds containing titanium, magnesium and halogens, and catalysts for polymerizing olefins obtained by mixing said components with organometallic Al compounds are disclosed.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: December 7, 1982
    Assignee: Montedison S.p.A.
    Inventors: Umberto Scata', Luciano Luciani, Pier C. Barbe'