Patents Represented by Attorney, Agent or Law Firm P. W. Leuzzi
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Patent number: 6306981Abstract: 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: GrantFiled: April 2, 1999Date of Patent: October 23, 2001Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Robert Cecil Brown, Norman Louis Balmer, Larry Lee Simpson
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Patent number: 6232256Abstract: A catalyst composition is provided, which is prepared by contacting a cycloalkadienyl compound, a transition metal amide of the formula M(NMe2)mXn, an aluminoxane, and optionally a solid support at a temperature of 0 to 100° C.Type: GrantFiled: November 5, 1999Date of Patent: May 15, 2001Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Xinmin Yang, Walter Thomas Reichle, Frederick John Karol
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Patent number: 6214903Abstract: There is provided a post-reactor process for a polymer, especially an elastomeric polymer, prepared by a gas phase polymerization in the presence of an inert particulate material comprising: introducing the polymer containing inert particulate material into a polishing vessel in the presence of a fluidizing gas under polishing conditions.Type: GrantFiled: June 16, 1998Date of Patent: April 10, 2001Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Ronald Steven Eisinger, Fathi David Hussein, David Nunn Jones, Ronald Irvin Raether, David Merrill Rebhan, Joseph Patrick Welch, Gary Harry Williams
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Patent number: 6211310Abstract: The present invention teaches the use of particular soluble metallocene catalysts to produce stereoregular polymers in gas phase polymerizations wherein the catalysts are fed into a particular lean zone in the reactor. The metallocene catalysts are bridged bis(substituted indenyl) compounds.Type: GrantFiled: December 4, 1998Date of Patent: April 3, 2001Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Mark Gregory Goode, Clark Curtis Williams, Timothy Roger Lynn, Robert Converse Brady, III, Jody Michael Moffett
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Patent number: 6200509Abstract: There is provided a method which reduces fines while maintaining the bulk handling advantages of granular or particulate elastomers such as those produced in gas phase processes and which affords continuous bulk handling of synthetic rubbers or elastomers such as those produced in solution and/or suspension processes. The method comprises (1) feeding an crumb form elastomer or a granular elastomer which contains fines along with optionally one or more filler materials to a mixer/extruder where it is masticated and melted into a compound; (2) pumping the compound through an orifice of the mixer/extruder, and (3) cutting and forming the compound into shaped pellets ranging in size from about 0.5 to 30 mm.Type: GrantFiled: June 26, 1998Date of Patent: March 13, 2001Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Anthony Charles Neubauer, Leonard Sebastian Scarola, Benjamin Roman Rozenblat
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Patent number: 6166154Abstract: The invention relates to a process for the polymerization of olifins in the presence of an activated catalyst composition comprising a single site catalyst precursor and an activating cocatalyst, which comprises contacting outside of a polymerization reactor a single site catalyst precursor with an activating cocatalyst before, during, or after contacting the single site catalyst precursor with a weakly coordinating electron donor that does not substantially polymerize during either contacting.Type: GrantFiled: May 15, 1999Date of Patent: December 26, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: John Henry Oskam, Thomas Henry Peterson, David James Schreck, Purna Chand Sishta, Timothy Todd Wenzel, Gregory Todd Whiteker, Clark Curtis Williams
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Patent number: 6136748Abstract: A catalyst composition for the polymerization of olefins is provided, which comprises a) a catalyst comprising a metal atom complexed with a non-cycloalkadienyl anionic ligand, wherein the chemical hardness, .eta., and chemical potential, .mu., of said non-cycloalkadienyl anionic ligand calculated using the MOPAC (PM3) computer program satisfy the relationship: .eta.=3.0+0.75.mu..+-.0.2 eV; and b) an activating cocatalyst.Type: GrantFiled: June 12, 1998Date of Patent: October 24, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Jack Allen Smith
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Patent number: 6127302Abstract: There is provided a catalyst containing a transition metal precursor having the formula (C.sub.5 R.sup.1.sub.5)MQ.sub.3, a bulky non-phenolic compound, an aluminoxane, and optionally a Br.phi.nsted acid and/or a support or spray drying material. There is also provided a polymerization process employing the catalyst composition, a polymer produced using the catalyst, and a cable produced therefrom.Type: GrantFiled: December 9, 1997Date of Patent: October 3, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Eric Paul Wasserman
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Patent number: 6117399Abstract: The invention teaches a novel design for a fluidized bed polymerization reactor which utilizes a primary fluidization grid to provide mixing and fluidization of the polymer and at least one secondary distribution plate located above the first distribution plate to promote segregation of polymer particles by size, the larger particles falling into the lower fluidization zone and the smaller particles being entrained up from the primary fluidization grid and through the secondary distribution grid into an upper reaction zone.Type: GrantFiled: April 23, 1997Date of Patent: September 12, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Robert James Jorgensen, Steven Paul Sawin
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Patent number: 6113862Abstract: The invention teaches a novel design for a fluidized bed polymerization reactor which utilizes a primary fluidization grid to provide mixing and fluidization of the polymer and at least one secondary distribution plate located above the first distribution plate to promote segregation of polymer particles by size, the larger particles falling into the lower fluidization zone and the smaller particles being entrained up from the primary fluidization grid and through the secondary distribution grid into an upper reaction zone.Type: GrantFiled: July 14, 1997Date of Patent: September 5, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Robert James Jorgensen, Steven Paul Sawin
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Patent number: 6112777Abstract: There is provided a process for bulk handling an elastomeric material in granular form comprising loading said elastomeric material into a transport vessel while maintaining the loading temperature of the majority of the elastomeric material below 60 degrees C., preferably below 45 degrees C.Type: GrantFiled: November 19, 1998Date of Patent: September 5, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Thomas Wayne Kay, Duanfan Wang, John Francis Kantz, Alvin Otis Bowles, Jr.
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Patent number: 6114475Abstract: There is provided a process for drying a fluidized reactor system comprising introducing a boiling point depressing agent into said system optionally while heating said system.Type: GrantFiled: April 6, 1998Date of Patent: September 5, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Mark Gregory Goode, Eldon Ronald Larsen, Hemal Ranchhod Patel, Jeffery Scott Bradley
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Patent number: 6111034Abstract: Addition of water to a gas phase olefin polymerization reactor in amounts greater than 3 ppmv permits an increase in the level of condensable gas and facilitates operation of the reactor at an elevated dew point by ameliorating electrostatic phenomena in the reactor; the process inhibits sheeting.Type: GrantFiled: December 31, 1998Date of Patent: August 29, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Mark Gregory Goode, Clark Curtis Williams, Fathi David Hussein, Thomas James McNeil, Kiu Hee Lee
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Patent number: 6103657Abstract: A catalyst precursor having the formula:A.sub.q ML.sub.nwherein each A has the formula: ##STR1## M is a metal selected from the group consisting of Group 3 to 6 elements and Lanthanide series elements;each L is a monovalent, bivalent, or trivalent anion;X and Y are each heteroatoms;Cyclo is a cyclic moiety;each R.sup.1 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group 13 to 17 elements, and two or more adjacent R.sup.1 groups may be joined to form a cyclic moiety;each R.sup.2 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group 13 to 17 elements, and two or more adjacent R.sup.Type: GrantFiled: June 23, 1998Date of Patent: August 15, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Rex Eugene Murray
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Patent number: 6069109Abstract: A process for the production of a catalyst precursor comprising reacting (a) a metallocene dihalide; (b) a compound of the formula: ##STR1## wherein each Q is the same or different and is independently selected from the group consisting of O, NR, CR.sub.2, and S; E is either C or S; Z is selected from the group consisting of --OR, --NR.sub.2, --CR.sub.3, --SR, --SiR.sub.3, --PR.sub.2, --H, and a substituted or unsubstituted aryl group; and each R is independently a group containing carbon, silicon, nitrogen, oxygen, and/or phosphorus; and (c) a trialkylamine.Type: GrantFiled: July 1, 1998Date of Patent: May 30, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Sun-Chueh Kao, Frederick John Karol
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Patent number: 6054405Abstract: A catalyst composition for the polymerization of olefins is provided, which comprises the reaction product of a fulvene, a complex of an atom selected from Groups 3-14 and the Lanthanides, and an activating cocatalyst.Type: GrantFiled: December 29, 1997Date of Patent: April 25, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Timothy Todd Wenzel
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Patent number: 6028151Abstract: A process for producing an olefin polymer, which comprises contacting at least two olefin monomers under polymerization conditions with a catalyst composition comprising A) an aluminoxane-impregnated support prepared by contacting an aluminoxane with an inert carrier material and heating to a temperature of at least about 80.degree. C.; B) a metallocene of the formula:(L).sub.y (L')MY.sub.(x-y-1)wherein M is a metal from groups IIIB to VIII of the Periodic Table; each L and L' is independently a cycloalkadienyl group bonded to M; each Y is independently hydrogen, an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having 1-20 carbon atoms, a hydrocarboxy radical having from 1-20 carbon atoms, a halogen, RCO.sub.2 --, or R.sub.2 N--, wherein R is a hydrocarbyl group containing 1 to about 20 carbon atoms; y is 0, 1, or 2; x is 1, 2, 3, or 4; and x-y.gtoreq.1; C) a bulky aluminum alkyl of the formula:AlR.sup.1.sub.x R.sup.2.sub.(3-x)wherein R.sup.Type: GrantFiled: February 25, 1998Date of Patent: February 22, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Eric Paul Wasserman, Sun Chueh Kao, Frederick John Karol
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Process for deactivation of polyolefin compositions utilizing carbon dioxide as a deactivation agent
Patent number: 6022946Abstract: A method of deactivating a polyolefin polymer is disclosed whereby the polymer is contacted in a post-reactor vessel with CO.sub.2 and then an acid acceptor and at least one secondary antioxidant are incorporated into the deactivated polyolefin polymer. The resulting product displays improved color and reduced melt flow breaking tendency, and does not exhibit polymer agglomeration and stickiness.Type: GrantFiled: December 23, 1998Date of Patent: February 8, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: James Douglas McCullough, Jr. -
Patent number: 6022628Abstract: A polymer composition having improved balanced mechanical and optical properties comprising (i) a random copolymer comprising from about 0.8% to about 20% by weight of butene-1 and from about 80% to about 99.2% by weight of propylene, and (2) from about 0%-0.35% by weight of polymer composition of a synthetic amorphous silica antiblock agent.Type: GrantFiled: August 11, 1997Date of Patent: February 8, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Ananda Mohan Chatterjee, Randolph Neil Campbell
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Patent number: 6011128Abstract: There is provided process for producing an ethylene-alpha-olefin polymer at a polymerization reaction temperature in excess of the softening temperature of the polymer in a gas-phase fluidized-bed reactor in the presence of a polymerization catalyst and wherein the polymerization reaction is conducted in the presence of an inert particulate material, the improvement comprising: commencing polymerization by polymerizing an ethylene propylene rubber having a crystallinity ranging from about 4 to 18 percent as measured by differential scanning calorimetry.Type: GrantFiled: June 17, 1998Date of Patent: January 4, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Robert Steven Eisinger, Kiu Hee Lee, Fathi David Hussein, Daniel Paul Zilker, Jr.