[특허]Gas phase polymerization of olefins

Gas phase polymerization of olefins 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08F-002/34
출원번호	US-0659976 (1996-06-03)
발명자 / 주소	Swindoll Robert D. Story Bruce A. Kolthammer Brian W. S. Peil Kevin P. Wilson David R. Stevens James C.
출원인 / 주소	The Dow Chemical Company
인용정보	피인용 횟수 : 84 인용 특허 : 235

초록 ▼

A gas phase fluidized bed process is described for producing ethylene polymers having improved processability and an MWD of less than about 2.9. Multiple reactors in series or parallel may be used to produce in-situ blended polymers. Each reactor can separately have a constrained geometry catalyst or a conventional Ziegler-Natta catalyst as needed for obtaining in-situ blended polymer with the desired properties as long as there is a constrained geometry catalyst in at least one reactor. Olefin polymers can be produced according to this invention which have low susceptibility to melt fracture, even under high shear stress conditions.

대표청구항 ▼

[ We claim:] [1.] A fluidized bed, gas phase process for the production of an ethylene polymer having long chain branching and a critical shear stress at the onset of gross melt fracture of greater than about 4.times.10.sup.6 dyne/cm.sup.2, the process comprising the steps of:(A) feeding gaseous monomers into a fluidized bed reactor and contacting the monomers under continuous polymerization conditions in the reactor, the gaseous monomers comprising at least one of (i) ethylene, or (ii) ethylene and at least one of a copolymerizable alpha-olefin or diolefin, in the presence of a catalyst prepared from:1. a metal complex corresponding to the formula: [ STR 5 ] wherein: M is a Group 4 metal in the +2, +3 or +4 formal oxidation state;L is a group containing a cyclic, delocalized, aromatic, anionic, system through which the L group is bound to M, and which L group is also bound to Z, said L group containing up to 60 nonhydrogen atoms;Z is a moiety covalently bound to both L and Y, comprising boron, or a member of Group 14 of the Periodic Table of the Elements, said moiety having up to 60 non-hydrogen atoms;Y is a moiety comprising nitrogen, phosphorus, sulfur or oxygen through which Y is covalently bound to both Z and M, said moiety having up to 25 nonhydrogen atoms;X' independently each occurrence is a Lewis base containing up to 40 nonhydrogen atoms;X independently each occurrence is a monovalent anionic moiety having up to 20 nonhydrogen atoms, provided however that neither X is an aromatic group that is .pi.-bonded to M, optionally, two X groups may be covalently bound together forming a divalent dianionic moiety having both valences bound to M, or further optionally one or more X and one X' group may be bonded together thereby forming a moiety that is both covalently bound to M and coordinated thereto by means of Lewis base functionality;q is a number from 0 to 1; andn is 0, 1 or 2 depending on the formal oxidation state of M;2. an activating cocatalyst selected from the group consisting of neutral Lewis acids and nonpolymeric, compatible noncoordinating ion forming compounds; and3. a support;(B) withdrawing continuously from the reactor unreacted gaseous monomers, and forming from the withdrawn unreacted gaseous monomers a recycle stream;(C) introducing a condensable fluid into the recycle stream to increase the dew point of the recycle stream and produce a two-phase mixture, and feeding the recycle stream to the reactor;(D) producing in the reactor from the gaseous monomers an ethylene polymer having long chain branching; and(E) recovering the ethylene polymer having long chain branching from the reactor.

이 특허에 인용된 특허 (235)

Rosen Robert K. (Sugar Land TX) Nickias Peter N. (Midland MI) Devore David D. (Midland MI) Stevens James C. (Midland MI) Timmers Francis J. (Midland MI), Addition polymerization process using stabilized reduced metal catalysts.
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Hagerty, Robert O.; Petsche, Irena B.; Schurzky, Kenneth G., Alpha-olefins polymerization catalyst of high productivity.
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Bontemps Xavier (Martigues FRX) Havas Laszlo (Martigues FRX) Martens Andre (Martigues FRX) Morterol Frederic R. M. M. (Sausset-Les-Pin FRX), Apparatus for gas phase polymerization of olefins in a fluidized bed reactor.
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Karol Frederick J. (Belle Mead NJ) Goeke George L. (Belle Mead NJ) Wagner Burkhard E. (Highland Park NJ) Fraser William A. (Princeton NJ) Jorgensen Robert J. (Dunbar WV) Friis Nils (Macungie PA), Article molded from ethylene hydrocarbon copolymer.
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Crass Guenther (Taunusstein DEX) Janocha Siegfried (Wiesbaden DEX) Bothe Lothar (Mainz-Gonsenheim DEX), Biaxially oriented opaque polyolefin multi-layer film.
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Lustig Stanley (Park Forest IL) Mack Nancy M. (Chicago IL) Schuetz Jeffrey M. (Woodridge IL) Vicik Stephen J. (Darien IL), Biaxially stretched, heat shrinkable VLDPE film.
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Hostetter Barry J. (Decatur GA), Branched polyolefin as a quench control agent for spin melt compositions.
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Jejelowo Moses O. (Kingwood TX) Bamberger Robert L. (Crosby TX), Catalyst and method of broadening polymer molecular weight distribution and increasing polymer tensile impact strength a.
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Bailly Jean-Claude (Martigues FRX) Bres Philippe (Fos-sur-Mer FRX) Chabrand Christine (Martigues FRX) Daire Erick (Chateauneuf-les-Martigues FRX), Catalyst and prepolymer used for the preparation of polyolefins.
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Kolthammer Brian W. S. (Lake Jackson TX) Cardwell Robert S. (Lake Jackson TX) Tracy John C. (Lake Jackson TX), Catalyst composition.
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George Kathleen F. (Crosslanes WV), Catalyst composition for copolymerizing ethylene.
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Goeke George L. (Belle Mead NJ) Wagner Burkhard E. (Highland Park NJ) Karol Frederick J. (Belle Mead NJ), Catalyst composition for copolymerizing ethylene.
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Jorgensen Robert J. (Dunbar WV) Goeke George L. (Belle Mead NJ) Karol Frederick J. (Belle Mead NJ), Catalyst composition for copolymerizing ethylene.
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Lo Frederick Y. (Yanbu Al Sinaiyah NJ SAX) Nowlin Thomas E. (Somerset NJ) Wu Margaret M. (Belle Mead NJ), Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution.
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Lo Frederick Y. (Yanbu Al Sinaiyah NJ SAX) Nowlin Thomas E. (Somerset NJ) Wu Margaret M. (Belle Mead NJ), Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution.
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Allen Louanne M. (Port Arthur TX) Hagerty Robert O. (Metuchen NJ) Mohring Richard O. (Sour Lake TX), Catalyst composition for polymerizing alpha-olefins.
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Allen Luanne M. (Port Arthur TX) Hagerty Robert O. (Edison NJ) Mohring Richard O. (Bridgewater NJ), Catalyst composition for polymerizing alpha-olefins.
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Allen Luanne M. (Port Arthur TX) Hagerty Robert O. (Edison NJ) Mohring Richard O. (Bridgewater NJ), Catalyst composition for polymerizing alpha-olefins.
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Nowlin Thomas E. (Yanbu SAX), Catalyst composition for polymerizing alpha-olefins.
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Nowlin Thomas E. (Yanbu SAX), Catalyst composition for polymerizing alpha-olefins.
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Nowlin Thomas E. (Yanbu SAX), Catalyst composition for polymerizing alpha-olefins.
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Kioka Mamoru (Iwakuni JPX) Kashiwa Norio (Iwakuni JPX), Catalyst for olefin polymerization and processes for its production.
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Lee Kiu H. (South Charleston WV) Cieloszyk Gary S. (Somerville NJ), Catalyst impregnated on fine silica, process for preparing, and use for ethylene polymerization.
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Hlatky Gregory G. (Houston TX) Turner Howard W. (Webster TX), Catalyst system of enhanced productivity.
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Jacopich Werner (Vienna ATX) Winter Kurt (Vienna ATX) Mayr Siegfried (Vienna ATX), Circuit for monitoring a plurality of analog quantities.
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Biel Edward N. (Munster IN), Cling-wrap polyethylene film.
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Dobreski David V. (Fairport NY) Metz Robert J. (Rochester NY) Morris James (Bertrange LUX), Cling/no cling-slip stretch wrap film.
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Yamamoto Kaoru (Tokyo JPX) Inoue Takashi (Yokohama JPX) Kojima Shinji (Yokohama JPX) Nishimura Sadahiro (Kawasaki JPX), Coating composition for power cable.
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Bullard Edward M. (Rochester NY) Smith Gregory M. (Palmyra NY), Coextruded multi-layer polyethylene film and bag construction.
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Briggs William F. (Chelmsford MA) Bullard Edward M. (Rochester NY), Coextruded thermoplastic stretch-wrap.
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Briggs William F. (Chelmsford MA) Bullard Edward M. (Rochester NY), Coextruded thermoplastic stretch-wrap.
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Haas Armand (Mazingarbe FRX), Cold-stretchable, self-adhesive film composition.
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Minami Syuji (Ohtake JPX) Ueda Takashi (Ohtake JPX) Kioka Mamoru (Ohtake JPX) Kashiwa Norio (Iwakuni JPX), Continuous process for production of olefin polymers or copolymers.
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Mller Jakob (Enges CHX) Schreiber Peter (Ipsach CHX), Conveyor apparatus for the transport of sheet metal blanks.
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Cozewith Charles (Westfield NJ) Ju Shiaw (Edison NJ) Verstrate Gary W. (Matawan NJ), Copolymer compositions containing a narrow MWD component and process of making same.
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Morterol Frederic (Lavera FRX) Vidal Jean-Louis (Martigues FRX), Copolymerization of ethylene and an alpha-olefin having six carbon atoms comprising hexene-1 or 4-methyl-pentene-1 in a.
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Hobes John (Dinslaken DEX) Payer Wolfgang (Wesel DEX) Bexten Ludger (Hnxe DEX), Copolymers of ethylene and 2,4,4-trimethylpentene-1.
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Cancio Leopoldo V. (Cincinnati OH) Ryle Thomas R. (Burlington KY) Tomany Robert J. (Fairfield OH) Wu Pai-Chuan (Cincinnati OH), Disposable diapers, absorbent articles and thermoplastic sheet material having improving tape adhesion.
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Candlin John P. (Aston near Stevenage GB2) Caunt Anthony D. (Welwyn Garden City GB2) Law Peter L. (Cambridge GB2), Drying process and product.
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Datta Sudhin (Scotch Plains NJ) Kresge Edward N. (Watchung NJ), Easy processing ethylene propylene elastomers.
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Lai Shih-Yaw (Sugar Land TX) Wilson John R. (Richwood TX) Knight George W. (Lake Jackson TX) Stevens James C. (Midland MI) Chum Pak-Wing S. (Lake Jackson TX), Elastic substantially linear olefin polymers.
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Lai Shih-Yaw (Sugar Land TX) Wilson John R. (Richwood TX) Knight George W. (Lake Jackson TX) Stevens James C. (Midland MI), Elastic substantialy linear olefin polymers.
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Miwa Yukimasa (Nagoya JPX) Shimada Takeo (Yokkaichi JPX) Hayashi Shigekazu (Yokkaichi JPX) Ukita Michito (Yokkaichi JPX) Nakagawa Hideaki (Suzuka JPX) Matsuura Mitsuyuki (Kameyama JPX), Ethylene copolymer.
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Inoue Takashi (Yokohama JPX) Miyoshi Mituji (Fujisawa JPX) Matsuura Kazuo (Tokyo JPX) Yamamoto Kaoru (Tokyo JPX), Ethylene copolymer compositions for rotational molding.
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Morita Yoshinori (Iwakuni JPX) Inoue Hiroshi (Iwakuni JPX) Fujiyoshi Kenji (Ohtake JPX), Ethylene copolymers.
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Tanaka Masato (Sodegaura JPX) Machida Syuji (Sodegaura JPX) Uoi Michitake (Ichihara JPX), Ethylene copolymers and process for production.
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Cieloszyk Gary S. (Somerville NJ), Ethylene polymer compositions having improved transparency.
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McDaniel Max P. (Bartlesville OK) Short James N. (Bartlesville OK), Ethylene polymer produced using a catalyst comprising a phosphate and with a bis-(cyclopentadienyl)chromium(II) compound.
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Foster George Norris ; Chen Tong ; Wasserman Scott Hanley ; Lee Day-Chyuan ; Kurtz Stuart Jacob ; Gross Laurence Herbert ; Vogel Robert Harold, Ethylene polymers having enhanced processability.
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Imai Akio (Chiba JPX) Sugimori Kiyoyuki (Chiba JPX) Yamamoto Keisaku (Chiba JPX) Takane Minoru (Chiba JPX), Ethylene-a 상세보기

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