Patents Examined by F. M. Teskin
  • Patent number: 5015714
    Abstract: A heptadiene polymer comprising the repeating units ##STR1## and having a number-average molecular weight of 2,000-500,000.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: May 14, 1991
    Assignee: Tonen Corporation
    Inventors: Yoshiharu Doi, Satoshi Ueki, Hiroyuki Furuhashi
  • Patent number: 4988781
    Abstract: A homogeneous, random interpolymer of ethylene and an alpha-olefinically unsaturated carboxylic acid or ester having a melt flow rate in the range of about 0.1 to about 300 g/10 minutes, as determined by ASTM D-1238 ( C./2160 g), is improved during its manufacture when made in a substantially constant environment in a stirred autoclave under substantially steady-state conditions of temperature, pressure, and flow rates, said temperature and pressure being sufficient to produce a single phase reaction, using a free-radical initiator, said improvement being obtained by the use of a minor amount of a telogenic modifier in the reaction mixture, the process being further characterized by the use of either, or both, of (a) a temperature which is lower than that which would be required without the presence of the telogen, or (b) a pressure which is higher than that which would be required without the presence of the modifier.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: January 29, 1991
    Assignee: The Dow Chemical Company
    Inventors: Osborne K. McKinney, David A. Eversdyk, Michael E. Rowland
  • Patent number: 4987200
    Abstract: Polymers of olefin monomers and a substantially uniform concentration of carboxyl, hydroxyl, thio, amino, cabonyl and imino functional group-containing monomers. Polymers of olefin monomers and carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers substantially devoid of halogen. Method for preparing polymers by reacting carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers with non-halogenated organometallic compounds to form masked, functional group-containing monomers and polymerizing polymer chain monomers with the masked, functional group-containing monomers to produce a polymer chain. Method for forming masked, functional group-containing monomers by reacting carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers with non-halogenated organometallic compounds. Masked, carboxyl, hydroxyl, thio, amino, carbonyl and imino functional group-containing monomers.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: January 22, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Sudhin Datta, Edward N. Kresge
  • Patent number: 4977226
    Abstract: Process for production of a molded article comprising polymerizing a norbornene monomer having bicyclic or higher cyclic structure in the presence of a metathesis catalyst system and a viscosity modifier having room temperature viscosity of 300 to 50,000 cps which viscosity modifier comprises a ring-opened polymer and unreacted norbornene monomer having bicyclic or higher cyclic structure.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: December 11, 1990
    Inventors: Tomoo Sugawara, Motoyuki Yamato
  • Patent number: 4975492
    Abstract: The present invention relates to a butene-1 copolymer composition which has excellent heat sealing properties, mechanical characteristics, moldability, and transparency without lowering its surface characteristics, and is characterized by containing 75 to 99.5% by weight of a butene-1 copolymer comprising butene-1 unit and .alpha.-olefine having a carbon number of 2 to 3, and 25 to 0.5% by weight of a propylene polymer, the said butene-1 copolymer has an .alpha.-olefine unit content of 1 to 35 mol %, intrinsic viscosity of 0.9 to 7.2 dl/g, weight-average molecular weight/number-average molecular weight of 4 to 15, and the content of the boiling diethyl ether soluble component is 3 to 15% by weight of the copolymer.
    Type: Grant
    Filed: July 13, 1988
    Date of Patent: December 4, 1990
    Assignees: Idemitsu Petrochemical Company Limited, Neste Oy
    Inventors: Masahiko Kondo, Takashi Yamawaki
  • Patent number: 4972035
    Abstract: Ultra-high-molecular-weight polyolefin fine powder characterized in that said fine powder has an intrinsic viscosity measured in decalin at C. of at least 10 dl/g and an average particle diameter in the range of 1-80 .mu.m, at least 20 weight % of the powder passing through 350 Tyler mesh screen.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: November 20, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Michiharu Suga, Mamoru Kioka, Toshio Kobayashi, Akifumi Kato, Michio Endo
  • Patent number: 4972032
    Abstract: Copolymers of .alpha.-methylstyrene and acrylonitrile having improved composition of uniformity are prepared by emulsion polymerizing a first monomer stream having a weight ratio of .alpha.-methylstyrene/acrylonitrile from about 75/25 to about 85/15 and thereafter polymerizing a second monomer feed stream comprising acrylonitrile.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: November 20, 1990
    Assignee: The Dow Chemical Company
    Inventors: David E. Henton, Robert P. Dion, Norman A. Lefevre
  • Patent number: 4970278
    Abstract: Polymer scale deposition on polymerization reactor inside surfaces in the polymerization of a monomer or monomers having an ethylenic double bond and/or a monomer or monomers having diolefinic double bonds is prevented, peelability or removability of polymer scales deposited on such surface, if any, is improved and the scale inhibitor adherence to the wall surface of glass-lined polymerization reactors is improved by coating the inside surfaces of the reactor in advance with a coating composition comprising a quinone-amine compound having a molecular weight of at least 3,000 as obtained by subjecting at least one aromatic diamine and at least one aromatic quinone to addition reaction in at least one solvent having a solubility parameter of 8.5 to 24.0 and/or a reduced form of said quinone-amine compound and at least one silica organosol or a mixture of at least one silica organosol and at least one alkyl silicate to thereby form a hydrophilic coat film on the surfaces.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: November 13, 1990
    Assignee: Kanegafuchi Chemical Industry Co., Ltd.
    Inventors: Takamichi Komabashiri, Masahiro Tsujinaka, Toragoro Mitani
  • Patent number: 4970279
    Abstract: A process for (co)polymerizing alpha-olefins in the gas phase in a fluidized bed or mechanically stirred bed reactor using a Ziegler-Natta type catalyst or a heat activated chromium oxide/refractory oxide catalyst wherein the (co)polymerization is carried out in the presence of 0.005 to 0.2 weight %, based on the weight of the (co)polymer bed, of an inert pulverulent inorganic substance (e.g. silica) having a mean particle diameter between 0.5 and 20 microns. The process is capable of being operated at temperatures closer to the softening point of the produced polyolefin than in the absence of the pulverulent solid.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: November 13, 1990
    Assignee: BP Chemicals Limited
    Inventors: Jean-Claude A. Bailly, Joelle Collomb
  • Patent number: 4968764
    Abstract: A rubber compounding material incorporating a cyclopentadiene-based pertroleum resin prepared by thermally copolymerizing 100 parts by weight of a cyclopentadiene-based feed or dicyclopentadiene-based feed with about 5 to 100 parts by weight of an .alpha.-olefin having from 6 to 16 carbon atoms at a temperature of from about to C. for a period of from about 10 minutes to 10 hours in the presence or absence of a solvent.A rubber composition is also disclosed, composed of this rubber compounding material in combination with a diene-based polymer.In rubber compositions for tires, the compounding material and rubber composition of the present invention greatly improve resistance to cutting and chipping of the tread.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: November 6, 1990
    Assignee: Maruzen Petrochemical Co., Ltd.
    Inventors: Suetou Hayashida, Kirou Yanagimoto
  • Patent number: 4968765
    Abstract: Disclosed is a molecularly oriented molded body of an ultra-high-molecular-weight ethylene/polyene copolymer having an intrinsic viscosity (.eta.) of at least 5 dl/g and such a content of a polyene that the number of molecules of the polyene is 0.01 to 15 on the average per 1000 carbon atoms, wherein the molded body shows at least two crystal fusion endothermic peaks when the measurement is conducted in the restraint state by using a differential scanning calorimeter, the molded body has at least one crystal fusion endothermic peak (Tp) at a temperature higher by at least C. than the inherent crystal fusion temperature (Tm) of the ultra-high-molecular-weight ethylene/polyene copolymer determined as the main fusion endothermic peak at the time of the second elevation of the temperature, and the quantity of heat based on said crystal fusion endothermic peak (Tp) is at least 15% based on the total fusion heat quantity.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: November 6, 1990
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Kazuo Yagi, Akinori Toyota
  • Patent number: 4966951
    Abstract: A copolymer of ethylene and a higher alpha-olefin, preferably 1-hexene and/or 4-methyl-1-pentene, can be produced using an activated and subsequently carbon monoxide reduced chromium containing catalyst and a trialkyl boran cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that can be made into a tough, impact resistant film.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: October 30, 1990
    Assignee: Phillips Petroleum Company
    Inventors: Elizabeth Benham, Max P. McDaniel, Fay W. Bailey
  • Patent number: 4966952
    Abstract: A novel process for providing a thermoplastic polymer having novel thermal characteristics including the critical step of masticating the polymer, either continuously or discontinuously, until the melt index of the polymer is substantially increased.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: October 30, 1990
    Assignee: The Hygenic Corporation
    Inventor: John Riaza
  • Patent number: 4965327
    Abstract: Synthetic elastomers are typically made commercially by employing emulsion polymerization or solution polymerization techniques. In such solution polymerization techniques, it is desirable to operate at the highest solids content which is practical. As a general rule, it is not practical to prepare such rubbers by solution polymerization at solids contents of higher than about 20 percent. However, the subject invention reveals a technique for preparing such rubbers by high solids solution polymerization at extremely high solids contents. This technique offers substantial advantages associated with eliminating large quantities of organic solvents.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: October 23, 1990
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Robert W. Stachowiak, Anthony J. Puccio, Thomas J. Eberhart
  • Patent number: 4965326
    Abstract: Process for inhibiting and for stopping radical induced polymerizations which employs an aromatic hydroxy dithiocarboxylic acid or salt thereof as stopping agent for deactivating radicals, thereby precluding the formation of carcinogenic nitrosamines.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: October 23, 1990
    Assignee: Bunawerke Huls GmbH
    Inventors: Gerhard Horpel, Joachim Pangratz
  • Patent number: 4965298
    Abstract: A process for preparing aqueous polymer solutions wherein a section of a fluid conduit through which a stream of liquid polymer product flows contains spaced static mixers. Heated water from a heat exchanger surrounding the section of conduit containing the mixers is introduced to a reactor to function as reaction water. The static mixers are spaced apart enough to enable the heat exchanger to sufficiently cool the liquid polymer product. The mixers function to mix other liquid agents with the liquid polymer product and to mix together warmer and cooler quantities of liquids encountered in the conduit.
    Type: Grant
    Filed: August 16, 1988
    Date of Patent: October 23, 1990
    Assignee: Marathon Oil Company
    Inventor: Wayne E. Luetzelschwab
  • Patent number: 4962185
    Abstract: Substantially benzene-free copolymers of maleic anhydride and alkyl vinyl ethers having benzene present in an amount of less than 1 ppm and toluene present in an amount of about 2.0 wt. % or less are provided by treating the copolymer powder with toluene at a temperature of about C. to about C.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: October 9, 1990
    Assignee: GAF Chemicals Corporation
    Inventors: Mohammed Tazi, Yoon T. Kwak, Krystyna Plochocka
  • Patent number: 4960864
    Abstract: Recovery of thermoplastic polymer solids from dispersions thereof by coagulation and subsequent washing of the solids is improved by contacting the polymer in the coagulation stage or the washing stage or in both stages with at least one tricarboxylic acid of the formula ##STR1## wherein X is a single covalent bond, --CH.sub.2 -- or --C.sub.2 H.sub.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: October 2, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Claus Wulff, Karl-Heinz Ott
  • Patent number: 4960842
    Abstract: Narrow molecular weight telechelic and/or block copolymers are prepared by anionic polymerization using an initiator composition comprising a multifunctional lithium initiator in combination with an organic diamine or triamine and optionally a metal alkoxide.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: October 2, 1990
    Assignee: The Dow Chemical Company
    Inventors: Grace Y. Lo, Eric W. Otterbacher, Massimo D. Bezoari, Brian W. Walther
  • Patent number: 4959435
    Abstract: Oriented, syndiotactic, optically transparent vinylaromatic polymers are prepared by a process comprising heating the polymer to a temperature above its crystalline melting point, cooling the polymer to a temperature less than an orientable temperature at a rate sufficient to avoid substantial crystal formation, and inducing strain into the polymer while at a orientable temperature to induce crystal formation and molecular orientation.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: September 25, 1990
    Assignees: The Dow Chemical Company, The Dow Chemical Company
    Inventors: Jerry T. Seitz, Charles A. Berglund, Andrew J. Pasztor, Jr.