JPS5610506A - Production of ethylene polymer composition - Google Patents

Production of ethylene polymer composition

Info

Publication number
JPS5610506A
JPS5610506A JP8586179A JP8586179A JPS5610506A JP S5610506 A JPS5610506 A JP S5610506A JP 8586179 A JP8586179 A JP 8586179A JP 8586179 A JP8586179 A JP 8586179A JP S5610506 A JPS5610506 A JP S5610506A
Authority
JP
Japan
Prior art keywords
polymer
ethylene
olefins
olefin content
transition metal
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.)
Granted
Application number
JP8586179A
Other languages
English (en)
Other versions
JPS6357446B2 (ja
Inventor
Yoshinori Morita
Norio Kashiwa
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.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13870656&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS5610506(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP8586179A priority Critical patent/JPS5610506A/ja
Priority to AT80302326T priority patent/ATE26122T1/de
Priority to US06/167,141 priority patent/US4307209A/en
Priority to EP80302326A priority patent/EP0022376B1/en
Priority to DE8080302326T priority patent/DE3071932D1/de
Publication of JPS5610506A publication Critical patent/JPS5610506A/ja
Publication of JPS6357446B2 publication Critical patent/JPS6357446B2/ja
Granted 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
    • C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
    • C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
    • 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
    • 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
    • C08F10/02—Ethene
    • 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
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Polymerisation Methods In General (AREA)
  • Graft Or Block Polymers (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
JP8586179A 1979-07-09 1979-07-09 Production of ethylene polymer composition Granted JPS5610506A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP8586179A JPS5610506A (en) 1979-07-09 1979-07-09 Production of ethylene polymer composition
AT80302326T ATE26122T1 (de) 1979-07-09 1980-07-09 Verfahren zur herstellung einer chemisch gemischten zusammensetzung aus nichtelastomerischen aethylen-harzen sowie aus dieser zusammensetzung geformte gegenstaende.
US06/167,141 US4307209A (en) 1979-07-09 1980-07-09 Process for production of chemically blended composition of non-elastomeric ethylene resins
EP80302326A EP0022376B1 (en) 1979-07-09 1980-07-09 Process for preparing a chemically blended composition of non-elastomeric ethylene resins, and shaped articles of such a composition
DE8080302326T DE3071932D1 (en) 1979-07-09 1980-07-09 Process for preparing a chemically blended composition of non-elastomeric ethylene resins, and shaped articles of such a composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8586179A JPS5610506A (en) 1979-07-09 1979-07-09 Production of ethylene polymer composition

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP30066789A Division JPH0314807A (ja) 1989-11-21 1989-11-21 エチレン重合体組成物の製法

Publications (2)

Publication Number Publication Date
JPS5610506A true JPS5610506A (en) 1981-02-03
JPS6357446B2 JPS6357446B2 (ja) 1988-11-11

Family

ID=13870656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8586179A Granted JPS5610506A (en) 1979-07-09 1979-07-09 Production of ethylene polymer composition

Country Status (5)

Country Link
US (1) US4307209A (ja)
EP (1) EP0022376B1 (ja)
JP (1) JPS5610506A (ja)
AT (1) ATE26122T1 (ja)
DE (1) DE3071932D1 (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5721409A (en) * 1980-07-16 1982-02-04 Showa Denko Kk Production of ethylene copolymer
JPS57126834A (en) * 1981-01-30 1982-08-06 Sumitomo Chem Co Ltd Ethylene-alpha-olefin copolymer resin composition
JPS588713A (ja) * 1981-07-10 1983-01-18 Showa Denko Kk エチレン系共重合体の製造方法
JPS588712A (ja) * 1981-07-08 1983-01-18 Showa Denko Kk エチレン系共重合体の製造方法
JPS5813605A (ja) * 1981-07-20 1983-01-26 Showa Denko Kk 高速成形性の改善されたエチレン系共重合体の製造方法
JPS59115310A (ja) * 1982-12-22 1984-07-03 Mitsubishi Chem Ind Ltd ポリオレフインの製造法
JPS59193914A (ja) * 1983-04-18 1984-11-02 Idemitsu Petrochem Co Ltd エチレン重合体
JP2010533774A (ja) * 2007-07-13 2010-10-28 ダウ グローバル テクノロジーズ インコーポレイティド 制御されたブロック配列分布及び少なくとも一つの低結晶性ハードブロックを有する触媒オレフィンブロックコポリマー
JP2014139332A (ja) * 2003-02-17 2014-07-31 Mitsui Chemicals Inc エチレン系重合体及び成形体への応用

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5692937A (en) * 1979-12-26 1981-07-28 Nippon Oil Co Ltd Resin composition for molding polyethylene film
US4438238A (en) 1981-01-30 1984-03-20 Sumitomo Chemical Company, Limited Low density copolymer composition of two ethylene-α-olefin copolymers
DE3272056D1 (en) * 1981-02-05 1986-08-28 Mitsubishi Chem Ind Process for producing polyolefin
IT1212698B (it) * 1983-02-10 1989-11-30 Sir Soc Italiana Resine Spa In sospensione di etilene con procedimento di copolimerizzazione alfa-olefine lineari perl'ottenimento di copolimeri a bassa densita'.
US5047468A (en) * 1988-11-16 1991-09-10 Union Carbide Chemicals And Plastics Technology Corporation Process for the in situ blending of polymers
TW206240B (ja) * 1990-02-13 1993-05-21 Mitsui Petroleum Chemicals Ind
US5519091A (en) * 1990-02-13 1996-05-21 Mitsui Petrochemical Industries, Ltd. Method for the preparation of ethylene polymer compositions
US5068212A (en) * 1990-08-20 1991-11-26 Phillips Ptroleum Company Olefin polymerization catalyst and method for production and use
US5095080A (en) * 1990-08-20 1992-03-10 Phillips Petroleum Company Olefin polymerization catalyst and method for production and use
US6316546B1 (en) 1991-03-06 2001-11-13 Exxonmobil Oil Corporation Ethylene polymer film resins
US5594078A (en) * 1991-07-23 1997-01-14 Phillips Petroleum Company Process for producing broad molecular weight polyolefin
GB9224876D0 (en) † 1992-11-27 1993-01-13 Exxon Chemical Patents Inc Improved processing polyolefin blends
BE1006439A3 (fr) 1992-12-21 1994-08-30 Solvay Societe Annonyme Procede de preparation d'une composition de polymeres d'ethylene, composition de polymeres d'ethylene et son utilisation.
ES2155095T5 (es) * 1993-10-21 2006-04-16 Exxonmobil Oil Corporation Mezclas de poliolefinas con distribucion bimodal de pesos moleculares.
IT1273660B (it) * 1994-07-20 1997-07-09 Spherilene Srl Procedimento per la preparazione di polimeri amorfi del propilene
US6506866B2 (en) 1994-11-17 2003-01-14 Dow Global Technologies Inc. Ethylene copolymer compositions
JPH08178381A (ja) * 1994-12-21 1996-07-12 Toshiharu Takahashi 換気口
US5714424A (en) * 1995-01-09 1998-02-03 W. R. Grace & Co.-Conn. Multi-component polyolefin catalysts
US5882750A (en) * 1995-07-03 1999-03-16 Mobil Oil Corporation Single reactor bimodal HMW-HDPE film resin with improved bubble stability
CN1094963C (zh) * 1995-07-10 2002-11-27 博雷利丝·波利默斯公司 涂料组合物
SE504455C2 (sv) 1995-07-10 1997-02-17 Borealis Polymers Oy Kabelmantlingskomposition, dess användning samt sätt för dess framställning
JPH09309926A (ja) 1996-05-17 1997-12-02 Dow Chem Co:The エチレン共重合体の製造方法
US6031027A (en) * 1996-10-09 2000-02-29 Borealis Polymers Oy Method of compounding a multimodal polymer composition
US6485662B1 (en) * 1996-12-03 2002-11-26 Union Carbide Chemicals & Plastics Technology Corporation Process for preparing a simulated in situ polyethylene blend
CA2277106C (en) * 1997-01-29 2008-04-22 The Dow Chemical Company Heteromorphic polymer compositions
US6165387A (en) * 1997-02-04 2000-12-26 Borealis A/S Composition for electric cables
SE9703798D0 (sv) 1997-10-20 1997-10-20 Borealis As Electric cable and a method an composition for the production thereof
SE513362C2 (sv) 1997-11-18 2000-09-04 Borealis As Förfarande för minskning av reaktornedsmutsning
SE520000C2 (sv) 1998-01-02 2003-05-06 Borealis Polymers Oy Isolerande komposition för en elektrisk kraftkabel samt kraftkabel innefattande den isolerande kompositionen
SE9802087D0 (sv) 1998-06-12 1998-06-12 Borealis Polymers Oy An insulating composition for communication cables
SE9802350D0 (sv) 1998-07-01 1998-07-01 Borealis As Mixing device
SE9802386D0 (sv) 1998-07-03 1998-07-03 Borealis As Composition for elektric cables
SE9804407D0 (sv) 1998-12-18 1998-12-18 Borealis Polymers Oy A multimodal polymer composition
GB0001914D0 (en) 2000-01-27 2000-03-22 Borealis Polymers Oy Catalyst
ATE382644T1 (de) * 2000-12-04 2008-01-15 Exxonmobil Chem Patents Inc Für viskositätsindexverbesserer und schmiermittelzusammensetzungen geeignete ethylencopolymerzusammensetzungen
DE60205387T2 (de) 2001-08-17 2006-06-01 Dow Global Technologies, Inc., Midland Bimodale polyethylenzusammensetzung und gegenstände daraus
SE0300195D0 (sv) 2003-01-28 2003-01-28 Borealis Tech Oy Coating composition, method of preparation thereofand substrate coated therewith
TW200504093A (en) * 2003-05-12 2005-02-01 Dow Global Technologies Inc Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom
GB0418581D0 (en) * 2004-08-20 2004-09-22 Solvay Polymer composition
GB0425444D0 (en) * 2004-11-18 2004-12-22 Solvay Multimodal composition for tapes, fibres and filaments
ES2309445T3 (es) 2004-12-17 2008-12-16 Borealis Technology Oy Proceso para la polimerizacion de olefinas en presencia de un catalizador de polimerizacion de las mismas.
EP1961777A1 (en) 2007-02-26 2008-08-27 Borealis Technology Oy Polyolefin homo- or copolymer with decreased shrinkage sensivity and improved crystallization behavior
US20100251577A1 (en) * 2007-10-31 2010-10-07 Sumitomo Chemical Company, Limited Thermoplastic resin for foam molding, thermoplastic resin composition for foam molding, foam molded article and footwear
EP2330135B1 (en) 2009-12-02 2012-11-07 Borealis AG Process for producing polyolefins
EP3241611B1 (en) 2016-05-02 2020-03-04 Borealis AG A process for feeding a polymerisation catalyst
EP3466708A1 (en) 2017-10-04 2019-04-10 Borealis AG Polyolefin composition for enhanced laser printing
EP3483189A1 (en) 2017-11-14 2019-05-15 Borealis AG Automated method for terminating an olefin polymerization reaction under emergency conditions
KR20200060905A (ko) 2018-11-23 2020-06-02 롯데케미칼 주식회사 폴리에틸렌 중합용 촉매의 제조방법
EP4251312A1 (en) 2020-11-27 2023-10-04 Borealis AG Catalyst feed system
EP4023711A1 (en) 2020-12-29 2022-07-06 Borealis AG Highly track resistant polyethylene compounds for wire and cable applications
EP4023712A1 (en) 2020-12-29 2022-07-06 Borealis AG Highly track resistant polyethylene compositions for wire and cable applications
EP4393989A1 (en) 2022-12-27 2024-07-03 Borealis AG Use of a magnesium hydroxide filler in highly track resistant polyethylene compositions

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392213A (en) * 1963-11-21 1968-07-09 Shell Oil Co Olefin polymerization process
JPS4329956Y1 (ja) * 1966-06-10 1968-12-07
US3592880A (en) * 1967-01-28 1971-07-13 Hoechst Ag Process for preparing polyolefins
JPS4842716A (ja) * 1971-09-30 1973-06-21
JPS5147079A (en) * 1974-10-22 1976-04-22 Mitsui Petrochemical Ind Echirenno tadanrenzokujugohoho
JPS51137783A (en) * 1975-05-12 1976-11-27 Wacker Chemie Gmbh Preparation of polyethylene
JPS5219788A (en) * 1975-08-05 1977-02-15 Stamicarbon Method and apparatus for polymerizing alphaaalkene
JPS53132082A (en) * 1977-04-25 1978-11-17 Showa Yuka Kk Process for producing improved ethylenic polymer
DE2826548A1 (de) * 1977-06-18 1979-01-04 Nippon Oil Co Ltd Verfahren zur kontinuierlichen herstellung von polyolefinen
JPS54100444A (en) * 1978-01-26 1979-08-08 Showa Denko Kk Polyethylene resin composition
JPS5560543A (en) * 1978-10-31 1980-05-07 Mitsubishi Chem Ind Ltd Polyolefin composition
JPS55164205A (en) * 1979-06-07 1980-12-20 Sumitomo Chem Co Ltd Multistage polymerization of ethylene
JPS56815A (en) * 1979-05-24 1981-01-07 Nippon Oil Co Ltd Preparation of polyolefin

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847402B2 (ja) * 1976-02-13 1983-10-22 三井化学株式会社 成形用重合体組成物およびその製法
NL6412934A (ja) 1964-07-20 1966-01-21
US3644318A (en) * 1968-08-21 1972-02-22 Hoechst Ag Process for the polymerization of olefins
GB1189038A (en) * 1968-09-11 1970-04-22 Mitsui Petrochemical Ind Novel Process for the Polymerisation of Ethylene and Novel Catalyst for use therein
NL162661B (nl) 1968-11-21 1980-01-15 Montedison Spa Werkwijze om een katalysator te bereiden voor de poly- merisatie van alkenen-1.
YU35844B (en) 1968-11-25 1981-08-31 Montedison Spa Process for obtaining catalysts for the polymerization of olefines
DE1931421C3 (de) * 1969-06-20 1973-12-06 Chemische Werke Huels Ag, 4370 Marl Zähflüssige Massen und Verfahren zu deren Herstellung
CA977094A (en) 1971-07-13 1975-10-28 The Dow Chemical Company High density ethylene polymer blend and polymerization process for preparation thereof
JPS5210916B1 (ja) * 1971-07-22 1977-03-26
US4071674A (en) * 1972-09-14 1978-01-31 Mitsui Petrochemical Industries Ltd. Process for polymerization or copolymerization of olefin and catalyst compositions used therefor
US4071672A (en) * 1972-11-10 1978-01-31 Mitsui Petrochemical Industries Ltd. Process for polymerizing or copolymerizing olefins
JPS6020405B2 (ja) * 1976-04-06 1985-05-22 三井東圧化学株式会社 低密度ポリエチレンの製造方法
JPS6025444B2 (ja) * 1976-04-13 1985-06-18 三井東圧化学株式会社 低密度ポリエチレンの製造方法

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392213A (en) * 1963-11-21 1968-07-09 Shell Oil Co Olefin polymerization process
JPS4329956Y1 (ja) * 1966-06-10 1968-12-07
US3592880A (en) * 1967-01-28 1971-07-13 Hoechst Ag Process for preparing polyolefins
JPS4842716A (ja) * 1971-09-30 1973-06-21
JPS5147079A (en) * 1974-10-22 1976-04-22 Mitsui Petrochemical Ind Echirenno tadanrenzokujugohoho
JPS51137783A (en) * 1975-05-12 1976-11-27 Wacker Chemie Gmbh Preparation of polyethylene
JPS5219788A (en) * 1975-08-05 1977-02-15 Stamicarbon Method and apparatus for polymerizing alphaaalkene
JPS53132082A (en) * 1977-04-25 1978-11-17 Showa Yuka Kk Process for producing improved ethylenic polymer
DE2826548A1 (de) * 1977-06-18 1979-01-04 Nippon Oil Co Ltd Verfahren zur kontinuierlichen herstellung von polyolefinen
JPS54100444A (en) * 1978-01-26 1979-08-08 Showa Denko Kk Polyethylene resin composition
JPS5560543A (en) * 1978-10-31 1980-05-07 Mitsubishi Chem Ind Ltd Polyolefin composition
JPS56815A (en) * 1979-05-24 1981-01-07 Nippon Oil Co Ltd Preparation of polyolefin
JPS55164205A (en) * 1979-06-07 1980-12-20 Sumitomo Chem Co Ltd Multistage polymerization of ethylene

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0317845B2 (ja) * 1980-07-16 1991-03-11 Showa Denko Kk
JPS5721409A (en) * 1980-07-16 1982-02-04 Showa Denko Kk Production of ethylene copolymer
JPS57126834A (en) * 1981-01-30 1982-08-06 Sumitomo Chem Co Ltd Ethylene-alpha-olefin copolymer resin composition
JPS588712A (ja) * 1981-07-08 1983-01-18 Showa Denko Kk エチレン系共重合体の製造方法
JPH0318644B2 (ja) * 1981-07-08 1991-03-13 Showa Denko Kk
JPS588713A (ja) * 1981-07-10 1983-01-18 Showa Denko Kk エチレン系共重合体の製造方法
JPH0318645B2 (ja) * 1981-07-20 1991-03-13 Showa Denko Kk
JPS5813605A (ja) * 1981-07-20 1983-01-26 Showa Denko Kk 高速成形性の改善されたエチレン系共重合体の製造方法
JPS59115310A (ja) * 1982-12-22 1984-07-03 Mitsubishi Chem Ind Ltd ポリオレフインの製造法
JPH0414122B2 (ja) * 1982-12-22 1992-03-11 Mitsubishi Chem Ind
JPS59193914A (ja) * 1983-04-18 1984-11-02 Idemitsu Petrochem Co Ltd エチレン重合体
JPH0373571B2 (ja) * 1983-04-18 1991-11-22 Idemitsu Petrochemical Co
JP2014139332A (ja) * 2003-02-17 2014-07-31 Mitsui Chemicals Inc エチレン系重合体及び成形体への応用
JP2010533774A (ja) * 2007-07-13 2010-10-28 ダウ グローバル テクノロジーズ インコーポレイティド 制御されたブロック配列分布及び少なくとも一つの低結晶性ハードブロックを有する触媒オレフィンブロックコポリマー

Also Published As

Publication number Publication date
JPS6357446B2 (ja) 1988-11-11
ATE26122T1 (de) 1987-04-15
EP0022376A3 (en) 1981-07-08
EP0022376A2 (en) 1981-01-14
US4307209A (en) 1981-12-22
DE3071932D1 (en) 1987-04-30
EP0022376B1 (en) 1987-03-25

Similar Documents

Publication Publication Date Title
JPS5610506A (en) Production of ethylene polymer composition
JPS5543152A (en) Preparation of copolymer
EP0818472A3 (en) Cyclic olefin copolymers, compositions and molded articles comprising the copolymers
EP0812862A3 (en) Process for polymerizing olefins
CA2125780A1 (en) Ethylene interpolymer polymerizations
JPS5661415A (en) Preparation of propylene-ethylene block copolymer
CA2019256A1 (en) Ethylene-aromatic vinyl compound alternating copolymer and process for the production thereof
JPS5571712A (en) Preparation of modified polypropylene
EP0401993A3 (en) Process for producing unsaturated copolymers
JPS5655416A (en) Production of propylene/ethylene block copolymer
KR840005825A (ko) 발포용 에틸렌프로필렌 공중합체의 제조방법
DE3069992D1 (en) Catalyst and process for producing olefin polymers or copolymers
JPS54139693A (en) Preparation of propylene-ethylene block copolymer
JPS5516048A (en) Preparation of propylene-ethylene block copolymer
JPS5470388A (en) Production of olefin polymer
JPS5622304A (en) Polymerization of olefin
JPS5330686A (en) Preparation of ethylene-propylene block copolymers
JPS5650909A (en) Manufacture of propylene-ethylene block copolymer
JPS57174310A (en) Production of propylene/ethylene block copolymer
JPS57180615A (en) Production of diene polymer having polymodal molecular weight distribution
JPS5580418A (en) Preparation of propylene-ethylene block copolymer
JPS5486587A (en) Propylene polymer for injection molding
JPS5653118A (en) Preparation of propylene-ethylene block copolymer
JPS57145115A (en) Continuous production of propylene/ethylene block copolymer
JPS5657810A (en) Preparation of random copolymer