JPS57153005A - Polymerization of alpha-olefin - Google Patents

Polymerization of alpha-olefin

Info

Publication number
JPS57153005A
JPS57153005A JP56038643A JP3864381A JPS57153005A JP S57153005 A JPS57153005 A JP S57153005A JP 56038643 A JP56038643 A JP 56038643A JP 3864381 A JP3864381 A JP 3864381A JP S57153005 A JPS57153005 A JP S57153005A
Authority
JP
Japan
Prior art keywords
olefin
compound
effecting
alkyl
acid ester
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56038643A
Other languages
English (en)
Inventor
Haruo Ueno
Takefumi Yano
Tokuji Inoue
Shigeru Igai
Yoshiyuki Kai
Michimasa Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Corp
Original Assignee
Ube Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP56038643A priority Critical patent/JPS57153005A/ja
Priority to US06/356,475 priority patent/US4435550A/en
Priority to CA000398042A priority patent/CA1169998A/en
Priority to KR8201112A priority patent/KR850001402B1/ko
Priority to IT20258/82A priority patent/IT1150696B/it
Priority to FR8204587A priority patent/FR2502157A1/fr
Publication of JPS57153005A publication Critical patent/JPS57153005A/ja
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S526/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S526/904—Monomer polymerized in presence of transition metal containing catalyst at least part of which is supported on a polymer, e.g. prepolymerized catalysts
JP56038643A 1981-03-19 1981-03-19 Polymerization of alpha-olefin Pending JPS57153005A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP56038643A JPS57153005A (en) 1981-03-19 1981-03-19 Polymerization of alpha-olefin
US06/356,475 US4435550A (en) 1981-03-19 1982-03-09 Method for polymerizing α-olefin
CA000398042A CA1169998A (en) 1981-03-19 1982-03-10 METHOD FOR POLYMERIZING .alpha.-OLEFIN
KR8201112A KR850001402B1 (ko) 1981-03-19 1982-03-16 α-올레핀의 중합법
IT20258/82A IT1150696B (it) 1981-03-19 1982-03-18 Metodo per la polimerizzazione di alfa-olefine
FR8204587A FR2502157A1 (fr) 1981-03-19 1982-03-18 Procede de polymerisation d'a-olefines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038643A JPS57153005A (en) 1981-03-19 1981-03-19 Polymerization of alpha-olefin

Publications (1)

Publication Number Publication Date
JPS57153005A true JPS57153005A (en) 1982-09-21

Family

ID=12530921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56038643A Pending JPS57153005A (en) 1981-03-19 1981-03-19 Polymerization of alpha-olefin

Country Status (6)

Country Link
US (1) US4435550A (ja)
JP (1) JPS57153005A (ja)
KR (1) KR850001402B1 (ja)
CA (1) CA1169998A (ja)
FR (1) FR2502157A1 (ja)
IT (1) IT1150696B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59213706A (ja) * 1983-05-20 1984-12-03 Idemitsu Petrochem Co Ltd α−オレフインの連続重合方法

Families Citing this family (119)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680351A (en) * 1985-09-06 1987-07-14 Phillips Petroleum Company Supported polyolefin catalyst components and methods of making and using same
US5654248A (en) * 1986-08-26 1997-08-05 Mitsui Petrochemical Industries, Ltd. Catalyst for polymerizing alpha-olefins and process for polymerization
KR920001353B1 (ko) * 1986-08-26 1992-02-11 미쓰이 세끼유 가가꾸 고오교오 가부시끼가이샤 α-올레핀의 중합용 촉매 및 중합법
US5166340A (en) * 1989-07-26 1992-11-24 Himont Incorporated Organosilane compounds
US5102842A (en) * 1990-08-23 1992-04-07 Himont Incorporated Catalyst for the polymerization of alpha-olefins containing trifluoropropyl substituted silane compounds
WO1995006556A1 (en) * 1993-09-02 1995-03-09 Quantum Chemical Corporation Biaxially-oriented polypropylene film with improved gas barrier
US6051666A (en) * 1995-04-10 2000-04-18 Dsm N.V. Method for preparing a catalyst suitable for polymerizing an olefin
KR970015607A (ko) * 1995-09-14 1997-04-28 크리스탄 플뢰미히 다수의 고체 촉매성분을 결합시키는 올레핀 중합을 위한 초기중합체
US6130180A (en) * 1997-12-23 2000-10-10 Montell North America Inc. Catalyst for the polymerization of alpha-olefins containing substituted amino silane compounds
EP1157045B1 (en) 1999-12-22 2004-10-20 Basell Poliolefine Italia S.p.A. Alpha-olefin polymerization catalyst system which contains an aromatic silane compound
KR101040388B1 (ko) * 2007-01-30 2011-06-09 주식회사 엘지화학 트리옥사실로칸을 포함하는 올레핀 중합용 촉매 및 이를이용한 올레핀 중합 방법
EP2174962B1 (en) 2008-10-08 2011-11-30 Borealis AG A method to produce very stiff polypropylene
EP2174965B1 (en) 2008-10-08 2013-05-29 Borealis AG Preparation of propylene copolymer with dynamically operated reactor
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EP2216347A1 (en) 2009-01-30 2010-08-11 Borealis AG A method of catalyst transitions in olefin polymerizations
ES2370689T3 (es) 2009-02-25 2011-12-21 Borealis Ag Polímero multimodal de polipropileno, composición que comprende el mismo y un procedimiento para producir el mismo.
WO2010115878A1 (en) 2009-04-09 2010-10-14 Borealis Ag Thermoplastic polyolefin composition
US7619049B1 (en) 2009-04-13 2009-11-17 Formosa Plastics Corporation, U.S.A. Cyclic organosilicon compounds as electron donors for polyolefin catalysts
US7790819B1 (en) 2009-04-13 2010-09-07 Formosa Plastics Corporation, U.S.A. Bicyclic organosilicon compounds as electron donors for polyolefin catalysts
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PL2495037T3 (pl) 2011-03-02 2021-01-11 Borealis Ag Zespół reaktora o wysokiej przepustowości do polimeryzacji olefin
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EP2617741B1 (en) 2012-01-18 2016-01-13 Borealis AG Process for polymerizing olefin polymers in the presence of a catalyst system and a method of controlling the process
US9815918B2 (en) 2012-03-19 2017-11-14 Formosa Plastics Corporation, U.S.A. Catalyst component for high activity and high stereoselectivity in olefin polymerization
US8575283B1 (en) 2012-06-28 2013-11-05 Formosa Plastics Corporation, U.S.A. Heterocyclic organic compounds as electron donors for polyolefin catalysts
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EP2719725B1 (en) 2012-10-11 2018-12-05 Abu Dhabi Polymers Company Limited (Borouge) Nucleated polypropylene composition for containers
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EP2796502A1 (en) 2013-04-22 2014-10-29 Abu Dhabi Polymers Company Limited (Borouge) Propylene random copolymer composition for pipe applications
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ES2632593T3 (es) 2013-04-22 2017-09-14 Borealis Ag Procedimiento de dos fases de producción de composiciones de polipropileno
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TR201808436T4 (tr) 2013-04-22 2018-07-23 Abu Dhabi Polymers Co Ltd Borouge Boru uygulamaları için geliştirilmiş darbe dayanımına sahip polipropilen kompozisyonu.
EP2796501B9 (en) 2013-04-22 2019-05-01 Abu Dhabi Polymers Company Limited (Borouge) Multimodal polypropylene composition for pipe applications
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EP2886600B1 (en) 2013-12-19 2018-05-30 Abu Dhabi Polymers Co. Ltd (Borouge) LLC. Multimodal polypropylene with respect to comonomer content
KR101895142B1 (ko) 2013-12-24 2018-09-04 아부 다비 폴리머스 씨오. 엘티디 (보르쥬) 엘엘씨. 고무 설계에 의한 저온에서의 우수한 충격 강도
EP3094660B1 (en) 2014-01-17 2018-12-19 Borealis AG Process for preparing propylene/1-butene copolymers
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EP2907841A1 (en) 2014-02-14 2015-08-19 Borealis AG Polypropylene composite
EP2913346B1 (en) 2014-02-28 2016-11-02 Borealis AG Process for polymerizing olefins in a fluidized bed
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EP2995631A1 (en) 2014-09-12 2016-03-16 Borealis AG Process for producing graft copolymers on polyolefin backbone
US9593184B2 (en) 2014-10-28 2017-03-14 Formosa Plastics Corporation, Usa Oxalic acid diamides as modifiers for polyolefin catalysts
EP3018156B1 (en) 2014-11-05 2023-03-22 Borealis AG Branched polypropylene for foam applications
EP3023450B1 (en) 2014-11-21 2017-07-19 Borealis AG Process for producing pellets of soft copolymers
PT3103818T (pt) 2015-06-12 2018-10-19 Borealis Ag Processo e aparelho para polimerização de olefinas em fase gasosa
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WO2017068106A1 (en) 2015-10-21 2017-04-27 Borealis Ag Long-chain branched polypropylene composition with increased melt strength stability
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EP3178853B1 (en) 2015-12-07 2018-07-25 Borealis AG Process for polymerising alpha-olefin monomers
EP3184166A1 (en) 2015-12-22 2017-06-28 Borealis AG A method for withdrawing agglomerates from a fluidised bed reactor
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EP3187512A1 (en) 2015-12-31 2017-07-05 Borealis AG Process for preparing propylene copolymer compositions
US9777084B2 (en) 2016-02-19 2017-10-03 Formosa Plastics Corporation, Usa Catalyst system for olefin polymerization and method for producing olefin polymer
US20190071563A1 (en) 2016-03-14 2019-03-07 Borealis Ag Polypropylene composition comprising flame retardant
EP3243622B1 (en) 2016-05-13 2020-09-09 Borealis AG Process for hydraulic conveying of polyolefin pellets
EP3281973A1 (en) 2016-08-11 2018-02-14 Borealis AG Polypropylene composition with flame retardant activity
US11427660B2 (en) 2016-08-17 2022-08-30 Formosa Plastics Corporation, Usa Organosilicon compounds as electron donors for olefin polymerization catalysts and methods of making and using same
US9815920B1 (en) 2016-10-14 2017-11-14 Formosa Plastics Corporation, Usa Olefin polymerization catalyst components and process for the production of olefin polymers therewith
CA3037512C (en) 2016-11-09 2021-07-13 Borealis Ag Polypropylene composition
AU2018216859B2 (en) 2017-02-01 2020-07-23 Borealis Ag Article comprising a layer element
US10822438B2 (en) 2017-05-09 2020-11-03 Formosa Plastics Corporation Catalyst system for enhanced stereo-specificity of olefin polymerization and method for producing olefin polymer
US10124324B1 (en) 2017-05-09 2018-11-13 Formosa Plastics Corporation, Usa Olefin polymerization catalyst components and process for the production of olefin polymers therewith
EP3418308B1 (en) 2017-06-20 2020-03-11 Borealis AG A method, an arrangement and use of an arrangement for olefin polymerisation
EP3418309A1 (en) 2017-06-20 2018-12-26 Borealis AG A method, an arrangement and use of an arrangement of preparing polymer
EP3418310B1 (en) 2017-06-23 2020-04-08 Borealis AG Process and apparatus for removing polymer material from a gas-solids olefin polymerization reactor
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DK3473674T3 (da) 2017-10-19 2022-06-20 Abu Dhabi Polymers Co Ltd Borouge Llc Polypropylensammensætning
EP3479896A1 (en) 2017-11-03 2019-05-08 Borealis AG Polymerization reactor system comprising at least one withdrawal valve
EP3483189A1 (en) 2017-11-14 2019-05-15 Borealis AG Automated method for terminating an olefin polymerization reaction under emergency conditions
ES2806646T3 (es) 2017-11-17 2021-02-18 Borealis Ag Procedimiento para mejorar la capacidad de enfriamiento de un reactor de polimerización de olefinas de gas-sólidos
ES2795985T3 (es) 2017-11-17 2020-11-25 Borealis Ag Procedimiento de división del gas de fluidización de retorno en un reactor de polimerización de olefinas de gas sólidos
WO2019219902A1 (en) 2018-05-18 2019-11-21 Abu Dhabi Polymers Co. Ltd (Borouge) L.L.C. Improving rheological properties of thermoplastic polyolefin compositions
WO2019228908A2 (en) 2018-05-28 2019-12-05 Borealis Ag Devices for a photovoltaic (pv) module
WO2019238428A1 (en) 2018-06-14 2019-12-19 Borealis Ag Process for polymerizing olefin in a gas phase reactor with improved thermal homogeneity
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US20210277290A1 (en) 2018-08-06 2021-09-09 Borealis Ag Propylene random copolymer based hot melt adhesive composition
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WO2020244834A1 (en) 2019-06-04 2020-12-10 Borealis Ag Process and reactor assembly for the enhancement of hydrodynamics in a gas-solids fluidized bed reactor
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EP3868793A1 (en) 2020-02-24 2021-08-25 Borealis AG Process for producing alpha-olefin polymers in a multistage polymerization process
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EP3915782A1 (en) 2020-05-25 2021-12-01 Borealis AG Layer element suitable as integrated backsheet element of a photovoltaic module
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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5330681A (en) * 1976-09-02 1978-03-23 Mitsui Petrochem Ind Ltd Preparation of polyalpha-olefin
JPS588686B2 (ja) 1978-12-01 1983-02-17 チッソ株式会社 α↓−オレフイン重合体の製造方法
JPS5817204B2 (ja) 1979-09-21 1983-04-05 宇部興産株式会社 α−オレフィンの重合法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59213706A (ja) * 1983-05-20 1984-12-03 Idemitsu Petrochem Co Ltd α−オレフインの連続重合方法

Also Published As

Publication number Publication date
KR850001402B1 (ko) 1985-09-30
IT8220258A0 (it) 1982-03-18
FR2502157B1 (ja) 1984-12-21
KR830009147A (ko) 1983-12-17
US4435550A (en) 1984-03-06
CA1169998A (en) 1984-06-26
FR2502157A1 (fr) 1982-09-24
IT1150696B (it) 1986-12-17

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