Patents Examined by R. Rabago
  • Patent number: 6323293
    Abstract: Provided is a process of polymerization wherein the catalyst comprises: A) a catalyst component consisting essentially of titanium, magnesium, halogen, a polycarboxylic ester, and an organic phosphorus compound; B) electron donor described by the formula:  wherein R1 is alkyl or cycloakylgroup containing at least one secondary or tertiary carbon atom, R2 and R3 are each independently alkyl or aryl group, and R4 is an alkyl group having a primary carbon bonded to the silicon atom; and C) organic aluminum compound.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: November 27, 2001
    Assignee: Fina Technology, Inc.
    Inventors: Edwar Shoukri Shamshoum, Christopher G. Bauch, Theodore Harris, Sehyun Kim, David John Rauscher
  • Patent number: 6316558
    Abstract: A polyolefin of a high molecular weight is produced by using a catalyst comprising a transition metal compound represented by General Formula (1):
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: November 13, 2001
    Assignee: Tosoh Corporation
    Inventors: Toshiyuki Kaneko, Ryuji Ikeda, Akihiro Yano, Morihiko Sato
  • Patent number: 6316546
    Abstract: A class of relatively high molecular weight, high density ethylene polymers (HMW-HDPE) is disclosed capable of being formed into thin films of high strength, such polymers having a density of at least about 0.925 g/cc, a flow index (I21) no highier than about 15 g/10 min., a melt flow ratio (MFR) of at least about 65, and a dynamic elasticity at 0.1 rad./sec. of no higher than about 0.7 at a corresponding complex viscosity at 0.1 rad./sec. no highier than about 14E5, i.e., about 14×105 poises. The ethylene polymer is a bimodal blend of relatively high molecular weight (HMW) and low molecular weight (LMW) ethylene polymers.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: November 13, 2001
    Assignee: ExxonMobil Oil Corporation
    Inventors: S. Christine Ong, Sandra D. Schregenberger, Pradeep P. Shirodkar
  • Patent number: 6313240
    Abstract: A process for producing an ethylene/&agr;-olefin copolymer is provided in which ethylene is copolymerized with an &agr;-olefin having three or more carbons by use of an olefin polymerization catalyst at a polymerization temperature of not lower than 120° C. The olefin polymerization catalyst comprises, as constitutional components, a) a metallocene compound comprising hafnium, b) an ionizing ionic compound, and c) an organoaluminum compound, the ionizing ionic compound (b) being a compound which is capable of changing the metallocene compound (a) into a cationic form and does not further react the cationic form of the metallocene compound.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: November 6, 2001
    Assignee: Tosoh Corporation
    Inventors: Saiki Hasegawa, Makoto Sone, Hisami Yasuda, Akihiro Yano
  • Patent number: 6310163
    Abstract: Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: October 30, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Maurice S. Brookhart, Lynda Kaye Johnson, Christopher Moore Killian, Samuel David Arthur, Jerald Feldman, Elizabeth Forrester McCord, Stephan James McLain, Kristina Ann Kreutzer, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Steven Dale Ittel, Anju Parthasarathy, Daniel Joseph Tempel
  • Patent number: 6306987
    Abstract: Disclosed is a compound of formula (I), and its use in preparing metathesis polymers of dicyclopentadiene and/or other strained cycloolefins in which Me is ruthenium or osmium; X1 and X2 independently of one another are anionic ligands, or X1 and X2 together are a bis-anionic ligand; Y is oxygen, sulfur or the groups —NR7— or —PR7—, where R7 is hydrogen or a substituent selected from the group C1-C6alkyl, C6-C13aralkyl, sulfonyl and —C(═O)Rs2 and Rs2 is hydrogen or a substituent selected from the group C1-C12alkyl, C2-C12alkenyl, C3-C12cycloalkyl, C3-C12cycloalkenyl, C2-C11heterocycloalkyl, C2-C11heterocycloalkenyl, C5-C12aryl, C1-C9heteroaryl, C6-C14aralkyl, C2-C13heteroaralkyl, C6-C14aralkenyl and C3-C13heteroaralkenyl; n is 0 or 1; L1 is tertiary phosphine; and L2 is a neutral e− donor ligand which is coordinated to the metal atom and is attached via the bridge group C* to the carbon atom of the carbene group if n is 0 and to Y if n is 1.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: October 23, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Paul Adriaan Van Der Schaaf, Andreas Hafner, Andreas Mühlebach
  • Patent number: 6306981
    Abstract: A process for the manufacture of olefin polymers in a continuous gas phase polymerization reaction wherein monomer, after passage through the fluidized bed, is cooled to a temperature below its dew point to produce a mixture of cold gas and liquid. All or nearly all of the cold gas is introduced into the bottom of the reactor to serve as the fluidizing gas stream for the fluidized bed. Cold liquid, separated from the mixture, is either injected directly into the peripheral region around the fluidized bed or onto the walls of the expanded section of the reactor to form a liquid film flowing down the wall of the reactor or alternatively, the cold liquid is warmed to form a heated fluid by passing in indirect heat exchange relation with the fluidized bed and is then injected directly into the peripheral region of the fluidized bed or onto the wall of the expanded section of the reactor to form a downward flowing stream of cold liquid.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: October 23, 2001
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Robert Cecil Brown, Norman Louis Balmer, Larry Lee Simpson
  • Patent number: 6303717
    Abstract: Oily hyperbranched polymers derived from ethylene, propylene, butene and/or a C5-C24 &agr;-olefin, and a method for their synthesis, are disclosed. The polymers have non-regular microstructures and are characterized by a ratio ()of methyl hydrogens centered around 0.85 ppm on the 1H-NMR spectra of the polymers relative to total aliphatic hydrogens of from about 0.40 to about 0.65 for polymers derived from ethylene or butene, and a ratio ()of from greater than 0.50 to about 0.65 for polymers derived from propylene. A method for grafting hyperbranched polymers derived from ethylene, propylene, butene and/or a C5-C24 &agr;-olefin onto aromatic rings in organic molecules and polymers, and the resulting grafted materials, are also disclosed. The hyperbranched polymers and grafted materials are useful, for example, as lubricants and lubricant additives.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: October 16, 2001
    Assignee: The Penn State Research Foundation University Park PA
    Inventors: Ayusman Sen, Jang Sub Kim, James H. Pawlow, Shahid Murtuza, Smita Kacker, Louis M. Wojcinski, III
  • Patent number: 6303710
    Abstract: The polymerization rate of olefins polymerizations using late transition metal catalysts which are coordinated to various ligands may be controlled by the amount of hydrogen present in the polymerization. The effect of hydrogen on polymerization rate is reversible.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: October 16, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Tuyu Xie
  • Patent number: 6291611
    Abstract: Olefin polymerization comprising catalysts based on a metallocene, an alumoxane and a support are disclosed. The process for the preparation of a supported olefin ploymerization catalyst comprises: a) a metallocene/activator reaction product, a solvent capable of dissolving it, and a porous support are brought into mutual contact, and b) the solvent is removed, and wherein step a) is carried out so that the porous support is impregnated with a volume of the metallocene/activator reaction product and solvent, which does not exceed the total pore volume of the support.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: September 18, 2001
    Assignee: Borealis Holding A/S
    Inventors: Kalle Kallio, Ove Andell, Hilkka Knuuttila, Ulf Palmqvist
  • Patent number: 6291607
    Abstract: Components of bimetallic catalysts for the polymerization of olefins comprising a compound of a transition metal M selected from Ti, V, Zr and Hf containing at least one M-&pgr; bond, a compound of Ti or V not containing metal-&pgr; bonds and a support comprising a magnesium halide. The catalysts obtained from the components of the invention are particularly suitable for gas-phase polymerization processes.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: September 18, 2001
    Assignee: Montell Technology Company
    Inventors: Mario Sacchetti, Stefano Pasquali, Gabriele Govoni
  • Patent number: 6291384
    Abstract: An ethylene-alpha-olefin copolymerization catalyst is prepared by impregnating a silica calcined at elevated temperature sequentially with an organomagnesium compound such as dialkylmagnesium compound, a silane compound which is free of hydroxyl groups, such as tetraethyl orthosilicate. A transition metal component such as titanium tetrachloride is then incorporated into the support. Unexpectedly, the calcination temperature of the silica used to prepare the catalyst precursors has a strong influence on polymer product properties. By increasing the calcination temperature of the silica from 600° to 700° C. or higher temperatures, a catalyst precursor when activated produced ethylene/1-hexene copolymers with narrower molecular weight distributions (MWD) as manifested by a decrease of resin MFR values of ˜3-4 units. Activation of this catalyst precursor with a trialkylaluminum compound results in a catalyst system which is effective for the production of ethylene copolymers.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: September 18, 2001
    Assignee: Mobil Oil Corporation
    Inventors: Robert I. Mink, Thomas E. Nowlin
  • Patent number: 6288189
    Abstract: Microspheres comprise a polymer including one or more of 1) a plurality of C3 or larger alpha-olefin units wherein the C3 or larger alpha-olefin units are incorporated into the polymer so as to give an average number of less than one branch point per C3 or larger alpha-olefin unit, 2) a plurality of C2 alpha-olefin units wherein the C2 alpha-olefin units are incorporated so as to give an average number of branch points greater than 0.01 per C2 alpha-olefin unit, and 3) cyclopentene or substituted cyclopentene, the microspheres having an average diameter in the range of 1 to 300 micrometers. Optionally, the polymer of the microspheres can be crosslinked. The microspheres can be prepared by suspension or dispersion polymerization processes using aqueous or organic reaction media. Powder coatings can be prepared from the microspheres.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: September 11, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Katherine A. Brown, Michael R. Kesti, Edward G. Stewart, Joseph M. McGrath
  • Patent number: 6288191
    Abstract: The present invention relates to an ethylene-isoprene random copolymer having an isoprene content of about 1 to 45% by mole, or an ethylene-isoprene copolymer having a Q-value of about 3.5 or less, wherein the Q-value is a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) The copolymer may be made using a catalyst comprising a compound of formula I, II or III, wherein M1 is a group IV transition metal, J is a group XIV atom, A and X3 are group XVI atoms, and Cp1 is a cyclopentadienyl-type group.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: September 11, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tadaaki Nishiyama, Atsuko Ogawa
  • Patent number: 6288183
    Abstract: A catalyst composition that is the combination of or the reaction product of ingredients including an iron-containing compound, a hydrogen phosphite, and a mixture of two or more organoaluminum compounds. This catalyst composition is particularly useful for polymerizing conjugated dienes. When this catalyst composition is used to polymerize 1,3-butadiene into syndiotactic 1,2-polybutadiene the ratio of the organoaluminum compounds can be adjusted to vary the melting temperature and molecular weight of the polymer product.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: September 11, 2001
    Assignee: Bridgestone Corporation
    Inventor: Steven Luo
  • Patent number: 6284381
    Abstract: A polymerizable acrylic composition comprises: (a) at least one acrylic monomer; (b) an effective amount of an organoborane amine complex having the structure: wherein: R1 is an alkyl group having 1 to 10 carbon atoms; R2 and R3 are independently selected from phenyl-containing groups and alkyl groups having 1 to 10 carbon atoms; R4 is selected from the group consisting of CH2CH2OH and (CH2)xNH2 wherein x is an integer greater than 2; R5 is hydrogen or an alkyl group having 1 to 10 carbon atoms; and the nitrogen atom to boron atom ratio is about 1:1 to 1.5:1; and (c) an effective amount of an acid for initiating polymerization of the acrylic monomer. The polymerizable acrylic compositions are especially useful for bonding low surface energy substrates.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: September 4, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Jury V. Zharov, Jury N. Krasnov
  • Patent number: 6284848
    Abstract: The present invention relates to a process for continuous gas phase polymerization of olefin(s) in a reactor containing a fluidized bed, consisting of a cylinder with a vertical side wall and of a desurging or disengagement chamber mounted above the said cylinder, characterized in that the fluidized bed occupies at least all of the cylinder with a vertical side wall of the reactor.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: September 4, 2001
    Assignee: BP Chemicals Limited
    Inventors: Daniel Durand, Frederic Robert Marie Michel Morterol
  • Patent number: 6281309
    Abstract: Fluorinated solid acids and supported fluorinated solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated water may be removed from the fluorinated solid acid catalyst and/or supported fluorinated solid acid catalyst prior to use. Resins with softening points (Ring and Ball) in the range of about 5° C. to 170° C. can be prepared. These catalysts offer advantages over the traditional Friedel-Crafts polymerization catalysts since the acid sites are an integral part of the solid. The fluorinated solid acid catalysts and supported fluorinated solid acid catalysts are relatively nonhazardous, reusable catalysts which eliminate or at least reduce contamination of the resulting resin products with acid residues or by-products.
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: August 28, 2001
    Assignee: Eastman Chemical Company
    Inventors: Laura M. Babcock, Dennis G. Morrell, John N. Kostas, Andrew Bell
  • Patent number: 6265511
    Abstract: A method is provided for producing hyperbranched polymers comprising heating a polymerizable reaction charge comprising (a) a monomer mixture comprising 50-99.1% by weight of at least one monoethylenically unsaturated monomer and 0.1-50% by weight of one or more multiethylenically unsaturated monomers and (b) if at least one ethylenically unsaturated monomer of the monomer mixture is not a thermally initiating monomer, a free radical polymerization initiator, to a temperature in the range from about 250° C. to about 400° C. in a continuous reactor which allows mixing of the reactor contents for a residence time of from about 2 minutes to about 60 minutes, provided that if the total amount of multiethylenically unsaturated monomer is less than 3% by weight of the monomer mixture than at least one of said one or more multiethylenically unsaturated monomers must be tri- or greater ethylenically unsaturated. The hyperbranched polymers prepared by this process are also described.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: July 24, 2001
    Assignee: S. C. Johnson Commerical Markets, Inc.
    Inventors: J. David Campbell, Fouad Teymour
  • Patent number: 6265506
    Abstract: A method of preparing generally amorphous copolymers of ethylene and at least one norbornene (NB)-type comonomer. These polymers may be random or alternating, depending on the choice of catalyst and/or the relative ratio of the monomers used. This method comprises polymerizing said monomers in a diluent or in bulk in the presence of a cationic palladium catalyst resulting from reacting a chelating ligand with a palladium (II) compound. The catalysts employed in this invention may be represented by the formula: wherein X and Y each independently is a donor heteroatom selected from P, N, O, S and As or an organic group containing said heteroatoms, and the heteroatoms are bonded to the bridging group A; A is a divalent group selected from an organic group and phosphorus forming together with X, Y and Pd a 4, 5, 6, or 7-membered ring, and preferably a 5-membered ring; R is a hydrocarbyl group; and CA is a weakly coordinating anion.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: July 24, 2001
    Assignee: The B. F. Goodrich Company
    Inventors: Brian Leslie Goodall, Lester Howard McIntosh, III