Patents Assigned to Exxon Chemicals Patents Inc
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Patent number: 6231936Abstract: Provided are articles such as packaging materials and medical devices having enhanced tolerance to radiation and heat, produced from a blend of from about 99% to about 50% by weight homo or copolymerized polypropylene and about 1% to about 50% by weight polyethylene produced by single-site catalysis, such polyethylene having a MWD between about 1 and about 4, and a CDBI greater than about 45%. Optionally, other blend components may be added, such as hindered amine stabilizers, secondary antioxidants, clarifying nucleators and secondary antioxidants. Also provided are processes for producing such articles.Type: GrantFiled: May 9, 1997Date of Patent: May 15, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: ReneƩ A. Kozimor, Robert C. Portnoy
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Patent number: 6232277Abstract: There are disclosed fuel compositions containing an additive formed by admixture of (i) at least one ethylene polymer, (ii) the product of the condensation reaction between an aldehyde or ketone or reactive equivalent thereof and at least one compound comprising one or more aromatic moieties having at least one substituent of the formula XR1 and one further substituent R2 wherein X is oxygen of sulfur, R1 is hydrogen or a moiety bearing at least one hydrocarbyl group and R2 represents a hydrocarbyl group and (iii) at least one oil soluble polar nitrogen compound different from the condensation product and having one or more substituents of the formula NR13 where R13 represents a hydrocarbyl group containing 8 to 40 carbon atoms.Type: GrantFiled: May 21, 1999Date of Patent: May 15, 2001Assignee: Exxon Chemical Patents IncInventors: Christophe Ledeore, Graham Jackson, Robert Dryden Tack, Iain More
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Patent number: 6228902Abstract: Emulsion delivery systems for applying anti-stick additives to polymer particles, provide free-flowing particles of polymers or polymer blends, that without the anti-stick additives tend to agglomerate. The agglomeration presents storage and handling difficulties. The anti-stick additives are selected from the group consisting of primary amides, secondary amides, ethylene bisamides, waxes, talc and silica.Type: GrantFiled: July 22, 1997Date of Patent: May 8, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Barry Gene Brueggeman, Peter Joseph Ferenz, Joel Edward Schmieg
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Patent number: 6228795Abstract: This invention relates to a catalyst system comprising a substituted, bridged bisindenyl metallocene supported on a polymeric support wherein the metallocene is activated for polymerization by an ionizing reaction and stabilized in cationic form with a noncoordinating anion. A protonated ammonium salt of a noncoordinating amine is covalently bonded to the support. Propylene polymers produced by these supported catalyst systems have melting points and polymer microstructures similar to propylene polymers produced using analogous unsupported catalyst systems.Type: GrantFiled: November 2, 1998Date of Patent: May 8, 2001Assignee: Exxon Chemical Patents, Inc.Inventor: James C. Vizzini
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Patent number: 6225432Abstract: Branched polypropylene compositions which have improved melt strength and good processability are provided. The branched polypropylene compositions of the present invention have a polydispersity of less than 4.0 and a melt point greater than 90° C. Further, the weight average branching index g of the polypropylene compositions is less than 0.95. Additionally, a novel process is provided for efficiently producing a branched polypropylene composition comprising: a) contacting propylene monomers in a reactor with an inert hydrocarbon solvent or diluent and a catalyst composition comprising one or more single site catalyst compounds capable of producing stereospecific polypropylene at a temperature from about 40° C. to about 120° C., wherein the ratio in the reactor of the propylene monomers to the inert hydrocarbon solvent or diluent is less than 9.Type: GrantFiled: August 17, 1999Date of Patent: May 1, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Weiqing Weng, Eric J. Markel, Armenag H. Dekmezian, Palanisamy Arjunan
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Publication number: 20010000258Abstract: A molded or extruded article made from a propylene, &agr;-olefin copolymer, where the &agr;-olefin has 5 or more carbon atoms (higher alpha-olefins (HAO)), where the copolymer is made with a metallocene catalyst system, provides substantially higher cold flow resistance and resiliency than when the propylene copolymer contains an &agr;-olefin of 4 or less carbon atoms. Other properties such as ultimate tensile strength and impact strength are substantially higher as well. Such polymers can be used to advantage in extruded profiles and molded parts either alone or in a thermoplastic olefin (TPO). Parts made from the propylene HAO copolymers or compounds made from them show improved creep resistance than propylene ethylene copolymers.Type: ApplicationFiled: December 8, 2000Publication date: April 12, 2001Applicant: Exxon Chemical Patents Inc.Inventors: James John McAlpin, Aspy Keki Mehta, Jean Philippe Autran
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Patent number: 6212905Abstract: This invention comprises a method of producing ethylene rich product streams from a pressurized charge gas mixture of olefins and other components received from olefin generation/preparation processes. The method of this invention may eliminate the need for cryogenic fractional distillation and other special separation equipment operating at temperatures below −55° F., and thus also potentially eliminate the refrigeration and heat exchange equipment needed to achieve those low temperatures. Alternatively, the method of this invention may eliminate the need for a circulating lean oil absorbant material, and thus also potentially eliminate the heat exchange equipment and reduces the refrigeration and fractional distillation load required to manage that material.Type: GrantFiled: June 23, 1999Date of Patent: April 10, 2001Assignee: Exxon Chemical Patents IncInventors: Keith H. Kuechler, David R. Lumgair
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Patent number: 6210561Abstract: An integrated process for converting a hydrocarbon feedstock having components boiling above about 100° C. into steam cracked products is described. The process first involves passing the feedstock to a hydrotreating zone to effect substantially complete decomposition of organic sulfur and/or nitrogen compounds. The product from the hydrotreating zone is passed to an aromatics saturation zone. The product is then passed to a steam cracking zone. Hydrogen and C1-C4 hydrocarbons, steam cracked naphtha, steam cracked gas oils and steam cracked tar are recovered. The amount of steam cracked tar produced is reduced by at least about 30 percent, and the amount of steam cracked tar produced is reduced by at least about 40 percent, basis the starting hydrocarbon feedstock which has not been subject to hydrotreating and aromatics saturation.Type: GrantFiled: May 8, 1997Date of Patent: April 3, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Carl W. Bradow, Dane C. Grenoble, Richard M. Foley, Brendan D. Murray, Bruce H. C. Winquist, Stanley N. Milam
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Patent number: 6207754Abstract: This invention relates to thermoplastic olefin compositions of a low modulus which are suitable for fabrication into flexible skins and liners for applications which heretofore have been serviced by skins and liners produced essentially only from plasticized polyvinyl chloride resin compositions. TPO compositions of this invention comprise an impact modified polypropylene resin and a “plastomer” resin intimately blended in proportions with respect of one to another to provide a blend composition having a 1% secant modulus of less than 40,000 psi, and preferably less than 30,000 psi. Optionally, and preferably, the blend also comprises as a discrete component apart from the impact modified polypropylene an olefin copolymer elastomer or a cross-linked elastomer concentrate. Optionally the blend may contain other polyolefin components to alter its stiffness in desirable ways.Type: GrantFiled: May 29, 1997Date of Patent: March 27, 2001Assignee: Exxon Chemical Patents, Inc.Inventor: Thomas Chen-Chi Yu
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Patent number: 6207756Abstract: This invention relates to polyolefin polymer dispersions having a semicrystalline plastic (SP) component and an amorphous elastomer (AE) component. The polymer dispersions of this invention are characterized by a continuous phase containing a discontinuous phase (dispersed phase) as seen by FIG. 2. Embodiments of this invention include either: 1) a discontinuous phase composed of the SP component dispersed within a continuous phase composed of the amorphous elastomer component and/or, 2) a discontinuous phase composed of the amorphous elastomer dispersed within a continuous phase composed of the SP component.Type: GrantFiled: March 1, 1999Date of Patent: March 27, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Sudhin Datta, Charles C. Cozewith, Bruce A. Harrington
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Patent number: 6207750Abstract: This invention relates to isotactic propylene homopolymer compositions obtained from metallocene catalysis wherein the polymer has a molecular weight distribution (Mw/Mn) in the range of from about 2.5 to about 20.0. The isotactic propylene homopolymer composition may be prepared in a multiple stage polymerization process using the same metallocene component in at least two stages.Type: GrantFiled: April 16, 1999Date of Patent: March 27, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Chon-Yie Lin, Michael Chia-Chao Chen, Aspy Keki Mehta, Rajan K. Chudgar
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Patent number: 6207748Abstract: Disclosed are hot melt adhesives comprising ethylene/alpha-olefin copolymers prepared with either supported or unsupported metallocene-alumoxane catalysts for applications in hot melt adhesives used in automotive product assembly, packaging and food packaging. These ethylene copolymers have weight average molecular weight ranging from about 20,000 to about 100,000 and comonomer weight percent ranging from about 6 to about 30. The hot melt adhesive composition includes the ethylene copolymer and a compatible tackifier at a ratio of tackifier to copolymer of from 70:30 to 30:70 and may also include up to 30 weight percent of a paraffinic and microcrystalline wax of the copolymer and tackifier.Type: GrantFiled: September 2, 1998Date of Patent: March 27, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Mun Fu Tse, Aspy Keki Mehta, Vince Leo Hughes
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Patent number: 6204344Abstract: A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slurry reactor through a discharge valve and transfer conduit into a first intermediate pressure flash tank with a conical bottom defined by substantially straight sides inclined at an angle to that of horizontal equal to or greater than the angle of slide of the slurry/polymer solids and an exit seal chamber of such diameter (d) and length (l) as to maintain a desired volume of concentrated polymer solids/slurry in the exit seal chamber such as to form a pressure seal while continuously discharging a plug flow of concentrated polymer solids/slurry bottom product of said first flash tank from the exit seal chamber through a seal chamber exit reducer with inclined sides defined by substantially straight sides inclined at an angle to tType: GrantFiled: May 18, 1999Date of Patent: March 20, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: James A. Kendrick, Thomas W. Towles, Scott T. Roger
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Patent number: 6197910Abstract: A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, repeating units of one or more comonomers, wherein the total comonomer repeating unit content of the polyolefin composition is from 0 to 20 mole percent, and further, wherein the weight average branching index g′ for the lower molecular weight region of the polyolefin composition is less than 0.93. Additionally, a process is provided for producing a polyolefin composition comprising: a) contacting, in solution, at a temperature from about 90° C. to about 120° C.Type: GrantFiled: February 6, 1998Date of Patent: March 6, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Weiqing Weng, Armen Dekmezian, Eric J. Markel, Avinash Gadkari, David L. Peters
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Patent number: 6198013Abstract: There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions. The catalyst comprises a first zeolite having particles of greater than about 0.1 micron average particle size and a binder comprising second zeolite particles having an average particle size less than said first particles.Type: GrantFiled: April 10, 1998Date of Patent: March 6, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Gary David Mohr, Tan Jen Chen, Kenneth Ray Clem, Mechilium Johannes Gerardus Janssen, Philip Andrew Ruziska, Johannes Petrus Verduijn
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Patent number: 6197285Abstract: A clear cosmetic gel composition comprising: (a) an aqueous phase comprising: (i) water, and (ii) at least one cosmetically active ingredient; (b) a coupling agent; (c) an oil phase comprising: (i) a silicone-containing solvent, and (ii) an isoparaffin solvent having a boiling range between about 100 to 340° C., wherein the isoparaffin constitutes between about 1 to 75% by weight, of the total of the oil phase; and (d) silicone-containing surfactant.Type: GrantFiled: September 14, 1999Date of Patent: March 6, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Ralph M. Kowalik, Karen K. Kuo, Philip Merchant, Jr.
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Patent number: 6197885Abstract: Vulcanized rubber parts suitable to dampen vibrations generated by mechanical devices are disclosed. The parts are based on a cured composition comprising one or a mixture of a diolefin polymers, e.g., natural rubber, a halogenated copolymer of a C4 to C7 isomonoolefin, e.g., isobutylene, and a para-alkylstyrene, filler and a curing system. The vulcanized parts exhibit improved aging and high temperature resistance and reduced deterioration of dynamic properties after long term exposure to high temperatures.Type: GrantFiled: December 4, 1998Date of Patent: March 6, 2001Assignee: Exxon Chemical Patents, Inc.Inventors: Shinichiro Yamashita, Kenneth Odell McElrath, Jr.
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Patent number: 6194341Abstract: The invention encompasses a mixed transition metal olefin polymerization catalyst system suitable for the polymerization of olefin monomers comprising one late transition metal catalyst system and at least one different catalyst system selected from the group consisting of late transition metal catalyst systems, transition metal metallocene catalyst systems or Ziegler-Natta catalyst systems. Preferred embodiments include at least one late transition metal catalyst system comprising a Group 9, 10, or 11 metal complex stabilized by a bidentate ligand structure and at least one transition metal metallocene catalyst system comprising a Group 4 metal complex stabilized by at least one ancillary cyclopentadienyl ligand. The polymerization process for olefin monomers comprises contacting one or more olefins with these catalyst systems under polymerization conditions.Type: GrantFiled: June 17, 1997Date of Patent: February 27, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Jo Ann Marie Canich, George Alan Vaughan, Phillip T. Matsunaga, David Edward Gindelberger, Timothy Daniel Shaffer, Kevin Richard Squire
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Patent number: 6190638Abstract: Mixtures of synthesis mixtures of different alkalinity's produce small MFI crystals that are not spherical.Type: GrantFiled: October 19, 1998Date of Patent: February 20, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Marc H. Anthonis, Antonie Jan Bons, Johannes P. Verduijn
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Patent number: H1955Abstract: Films, made of polyethylenes and fillers, and articles made therefrom greater WVTR than previously available films based on conventional Ziegler-Natta based polyethylenes. The polyethylenes are produced in a metallocene-catalyzed production process. The films may be made by a cast film process, and may be made in widely varying filler content, generally polyethylene to filler ratios of 30/70 to 70/30. The metallocene based polyethylenes when combined with filler also permit the extrusion of thinner films leading to lighter weight and softer films. The m-polyethylenes utilized for making such films typically have a Composition Distribution Breadth Index above 50%, a Mw/Mn below 3, and a Mz/Mw below 2.Type: GrantFiled: July 31, 1996Date of Patent: April 3, 2001Assignee: Exxon Chemical Patents Inc.Inventors: Jeffrey Alan Middlesworth, Kevin Arthur Brady