Patents Assigned to Exxon Chemical Patents Inc
  • Elevated pressure polymerization processes with late transition metal catalyst systems
    Patent number: 6127497
    Abstract: The invention encompasses late transition metal catalyst systems and their use in polymerization processes, particularly in solution, 2-phase suspension and super-critical phase polymerization of ethylene-containing polymers. Preferred embodiments include the use of a late transition metal catalyst system comprising a Group 8, 9, 10, or 11 metal complex stabilized by a bidentate ligand structure for polymerization under elevated ethylene pressure, or concentration, conditions.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: October 3, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Phillip T. Matsunaga, Jo Ann Marie Canich, George Alan Vaughan, David Edward Gindelberger, Rinaldo Soria Schiffino, Kevin Richard Squire, Rolf Bodo Temme
  • Power transmission fluids containing alkyl phosphonates
    Patent number: 6127323
    Abstract: The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of alkyl phosphonates, ashless dispersants and metallic detergents.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: October 3, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Raymond Frederick Watts, David Edward Gindelberger
  • Oil soluble dispersant additives useful in oleaginous compositions
    Patent number: 6127321
    Abstract: Hydrocarbyl substituted C.sub.4 to C.sub.10 monounsaturated dicarboxylic acid, anhydrides or esters, e.g. polyisobutenyl succinic anhydride, preferably made by reacting polymer of C.sub.2 to C.sub.10 monoolefin, preferably polyisobutylene, having a molecular weight of about 1500 to 5,000, preferably with a C.sub.4 to C.sub.10 monounsaturated acid, anhydride or ester, preferably maleic anhydride, such that there are 1.05 to 1.25 dicarboxylic acid producing moieties per molecule of said olefin polymer used in the reaction mixture. The resulting materials are useful per se as oil additives, or may be further reacted with amines, alcohols, amino alcohols, boric acid, etc. to form dispersants.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: October 3, 2000
    Assignee: Exxon Chemical Patents Inc
    Inventors: Jacob Emert, Robert D. Lundberg, Malcolm Waddoups
  • Catalytic upgrade of naphtha
    Patent number: 6123834
    Abstract: A process for reforming naphtha-containing hydrocarbon feedstreams is disclosed wherein a naphtha stream containing at least about 5 wt % of C9+ aromatics, at least about 25 wt % C.sub.5 to C.sub.9 aliphatic hydrocarbons and greater than 50 wt. ppm sulfur is contacted under reforming conditions with a bifunctional reforming catalyst, e.g. H.sup.+ ZSM-5, containing a dehydrogenation metal, e.g. zinc. The resulting reformate contains a higher ratio of C.sub.6 to C.sub.9 aromatics to C.sub.5 -C.sub.9 aliphatic hydrocarbon which boil near the boiling point of C.sub.6 to C.sub.8 aromatics present in the reformate, thereby facilitating separation of these aromatics form the reformate.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: September 26, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jar-Lin Kao, Henry M. Pogorzelski
  • Method of processing polyethylene and polyethylene/elastomer blends
    Patent number: 6124428
    Abstract: Melt processed linear polyethylenes which may optionally contain an elastomer, are shown to exhibit improved processability through the addition of certain surfactants. Among the melt processing parameters improved are reduced head pressure, reduced torque, reduced motor load, reduced or eliminated melt fracture, or combinations of these parameters. The surfactants can be chosen from a non-aromatic alkyl sulfonate or sulfate salt wherein a cation of the salt is selected from the group consisting of Na, K, Li, and other alkali cations and quaternary ammonium cations, said surfactant being essentially free of halogens.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: September 26, 2000
    Assignee: Exxon Chemical Patents, Inc
    Inventors: Joel Edward Schmieg, Thomas Craig Erderly, Dennis George Peiffer, James Joseph Chludzinski
  • Polymerization catalyst systems, their production and use
    Patent number: 6124230
    Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal catalyst which when utilized in a polymerization process substantially reduces the reactor fouling and sheeting in a gas, slurry or liquid pool polymerization process.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: September 26, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Anthony Nicholas Speca, Jeffrey Lawrence Brinen
  • Synergistic antioxidant systems
    Patent number: 6121209
    Abstract: The invention provides synergistic combinations of phosphorus acid-containing compounds with ashless antioxidants. These combinations dramatically improve the oxidation stability of lubricating compositions, particularly power transmission fluids such as automatic transmission fluids.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: September 19, 2000
    Assignee: Exxon Chemical Patents INC
    Inventors: Raymond Frederick Watts, Ricardo Alfredo Bloch
  • Thermosplastic vulcanizates from blends of a polypropylene and elastic .alpha.-olefin/cyclic olefin copolymers
    Patent number: 6121383
    Abstract: Thermoplastic vulcanizate blends are prepared from a semi-crystalline polymer and a rubbery copolymer derived from copolymerizing at least one alpha-olefin monomer and at least one cyclic olefin copolymer. The rubbery copolymer also includes repeat units from at least one polyene monomer. The polyene monomer provides residual unsaturation for crosslinking of said rubbery copolymer. Crosslinking the rubbery copolymer of the blend generally reduces tension set, compression set and oil swell in aliphatic solvents. The cyclic olefin monomer reduces oil swell in aliphatic oils.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: September 19, 2000
    Assignees: Advanced Elastomer Systems, L.P., Exxon Chemical Patents, Inc.
    Inventors: Sabet Abdou-Sabet, Bruce A. Harrington, Patrick Brant, Anthony J. Dias, Sudhin Datta
  • Process for converting oxygenates to olefins with direct product quenching for heat recovery
    Patent number: 6121504
    Abstract: The present invention relates to a process for catalytically converting a feedstock comprising an oxygenates to olefins with direct product quenching to increase heat recovery and to improve heat integration.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: September 19, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Keith H. Kuechler, James R. Lattner
  • Ionic metallocene catalyst compositions
    Patent number: 6121395
    Abstract: A polymerization process with ionic polymerization catalyst systems comprising a stable group 4 metal cation and bulky Group 13 metal or metalloid anion containing at least one fluorinated naphthyl or anthracenyl ligand useful for olefins, diolefins, or acetylenically unsaturated monomers, either alone or in combination with each other or with other polymerizable monomers is disclosed.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: September 19, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Howard William Turner
  • Polymerization catalyst systems, their production and use
    Patent number: 6117955
    Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst which when utilized in a polymerization process substantially reduces reactor fouling and sheeting in a gas or slurry polymerization process.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: September 12, 2000
    Assignee: Exxon Chemical Patents Inc
    Inventors: Agapios Kyriacos Agapiou, Chi-I Kuo, Michael Elroy Muhle, Anthony Nicholas Speca
  • Vinyl-containing stereospecific polypropylene macromers
    Patent number: 6117962
    Abstract: Stereospecific polypropylene macromers having a high percentage of vinyl terminal bonds and a method for preparing them are provided. The stereospecific polypropylene macromers have number average molecular weights (M.sub.n) of about 2,000 Daltons to about 50,000 Daltons, and the total number of vinyl groups per 1000 carbon atoms is greater than or equal to 7000.div.M.sub.n. The method for preparing the macromers involves:a) contacting, in solution, at a temperature from about 90.degree. C. to about 120.degree. C., two or more propylene monomers with a catalyst composition comprising a chiral, stereorigid transition metal catalyst compound; andb) recovering stereospecific polypropylene chains having number average molecular weights of about 2,000 Daltons to about 50,000 Daltons and significant vinyl unsaturation.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: September 12, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Weiqing Weng, Armen Dekmezian, Eric J. Markel, Avinash Gadkari, David L. Peters
  • Polymerization process
    Patent number: 6114477
    Abstract: The present invention relates to a gas phase process for the polymerization of monomer(s) utilizing a metallocene catalyst system to produce easy processing polyolefin polymers.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: September 5, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Natalie Ann Merrill, Jo Ann Marie Canich, Armenag Hagop Dekmezian, Richard Byron Pannell, Charles James Ruff
  • Polymerization catalyst systems, their production and use
    Patent number: 6114479
    Abstract: This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal catalyst which when utilized in a polymerication process substantially reduces the reactor fouling and sheeting in a gas, slurry or liquid pool polymerization process.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: September 5, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Anthony Nicholas Speca, Jeffrey Lawrence Brinen
  • High melt strength polyethylene compositions
    Patent number: 6114457
    Abstract: The invention is a polyethylene composition having a polydispersity index of less than or equal to 3, an average branching index (g') as measured by GPC/Vis.gtoreq.0.9, and a melt strength (MS) (centiNewton, 190.degree. C.) that satisfies the relationship: ##EQU1## In a preferred embodiment these polyethylene compositions comprise A) branched polyethylene copolymers prepared by insertion polymerization of ethylene, ethylene-containing macromers, and optionally, additional copolymerizable monomers, and B) essentially linear ethylene copolymers. Improved melt strength without sacrificing the benefits of narrow polydispersity index are exhibited by the invention compositions.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: September 5, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Eric J. Markel, Carlos U. DeGracia, Armen H. Dekmezian
  • Aromatic conversion processes and zeolite bound zeolite catalyst useful therein
    Patent number: 6111157
    Abstract: A process is provided for the alkylation, transalkylation, or isomerization of aromatic hydrocarbons. The processes comprises contacting aromatic hydrocarbons under conversion conditions with a zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst comprises first crystals of a first large pore zeolite which are bound together by second crystals of a second zeolite.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Dan Eldon Hendriksen, Gary David Mohr, Johannes Petrus Verduijn, Robert Scott Smith
  • Dual donor catalyst system for the polymerization of olefin
    Patent number: 6111039
    Abstract: The present invention provides a catalyst system that exhibits unexpected control of desired properties in polyolefin products. The catalyst system includes a titanium-supported catalyst in combination with a mixture of tetraethoxysilane (TEOS) and dicyclopentyldimethoxy-silane (DCPMS). This catalyst system has been found to be effective in making polypropylene and polypropylene copolymers having relatively high melt flow rates and moderately broad molecular weight distribution.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Nemesio Delgado Miro, George Byron Georgellis, Homer Swei
  • LLDPE blends with an ethylene-norbornene copolymer for resins of improved toughness and processibility for film production
    Patent number: 6111019
    Abstract: This invention is for LLDPE blends with an ethylene-norbornene copolymer for resins and improved toughness and processibility for film production. This invention provides LLDPE based resins which are significantly improved with respect to their capability to be fabricated into a film layer, particularly by a blown bubble extrusion technique. Films prepared of the LLDPE/E-NB melt blended resins of this invention are significantly improved with respect to certain of their film properties, such as tear strength, without detracting from the beneficial properties that a LLDPE otherwise provides to a film.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Palanisamy Arjunan, Wai Yan Chow, Bruce Allan Harrington, Yu Feng Wang, Henry Yang
  • Adhesives comprising copolymers of macromonomers and unsaturated acids or anhydrides
    Patent number: 6111027
    Abstract: This invention relates to an adhesive composition comprising a copolymer comprising units derived from one or more macromonomers and an unsaturated acid or an unsaturated anhydride wherein the weight average molecular weight of the copolymer is at least twice the weight average molecular weight of the macromonomer, the melt index of the copolymer is 1 dg/min or more, and wherein the macromonomer:(1) has a weight average molecular weight between 500 and 100,000;(2) has at least 30% terminal unsaturation; and(3) comprises a copolymer of ethylene and at least one .alpha.-olefin, and/or a copolymer of propylene and ethylene or an .alpha.-olefin.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents, Inc
    Inventors: Pamela J. Wright, Dennis George Peiffer, Kenneth Lewtas, Quoc Luvinh, Joseph Jacques Ripet, Anne Vera Macedo
  • Polyolefin block copolymer viscosity modifier
    Patent number: 6110880
    Abstract: A viscosity modifier comprising a low molecular weight block copolymer including A blocks and B blocks, wherein the A blocks comprise at least about 93 wt. % polyethylene and the B blocks comprise a copolymer of between about 40 wt. % to 75 wt. % ethylene and at least one other .alpha.-olefin; wherein the resulting block copolymer has an average ethylene content of between about 60 wt. % to 80 wt. %.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents Inc
    Inventors: Gary William Verstrate, Charles Cozewith, Thomas John Pacansky, William Myers Davis, Pratima Rangarajan