PL373793A1 - Sposób wytwarzania kompozycji liniowego polietylenu o małej gęstości - Google Patents

Sposób wytwarzania kompozycji liniowego polietylenu o małej gęstości

Info

Publication number
PL373793A1
PL373793A1 PL03373793A PL37379303A PL373793A1 PL 373793 A1 PL373793 A1 PL 373793A1 PL 03373793 A PL03373793 A PL 03373793A PL 37379303 A PL37379303 A PL 37379303A PL 373793 A1 PL373793 A1 PL 373793A1
Authority
PL
Poland
Prior art keywords
polymer
molecular weight
produce
compositions
density
Prior art date
Application number
PL03373793A
Other languages
English (en)
Inventor
Jari Äärilä
Irene Helland
Ole Jan Myhre
Jorunn Nilsen
Markku Vahteri
Original Assignee
Borealis Technology Oy
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 Borealis Technology Oy filed Critical Borealis Technology Oy
Publication of PL373793A1 publication Critical patent/PL373793A1/pl

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F297/00Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06Macromolecular 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
    • C08F297/08Macromolecular 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
    • C08F297/083Macromolecular 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 the monomers being ethylene or propylene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F10/02Ethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F297/00Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
    • C08F297/06Macromolecular 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
    • C08F297/08Macromolecular 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
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04Homopolymers or copolymers of ethene
    • C08L23/08Copolymers of ethene
    • C08L23/0807Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815Copolymers of ethene with aliphatic 1-olefins
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2410/00Features related to the catalyst preparation, the catalyst use or to the deactivation of the catalyst
    • C08F2410/06Catalyst characterized by its size
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2308/00Chemical blending or stepwise polymerisation process with the same catalyst

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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
PL03373793A 2002-06-24 2003-06-19 Sposób wytwarzania kompozycji liniowego polietylenu o małej gęstości PL373793A1 (pl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02396098A EP1378528B1 (en) 2002-06-24 2002-06-24 A process for the production of a linear low-density polyethylene composition

Publications (1)

Publication Number Publication Date
PL373793A1 true PL373793A1 (pl) 2005-09-19

Family

ID=29719802

Family Applications (1)

Application Number Title Priority Date Filing Date
PL03373793A PL373793A1 (pl) 2002-06-24 2003-06-19 Sposób wytwarzania kompozycji liniowego polietylenu o małej gęstości

Country Status (13)

Country Link
US (1) US7576166B2 (pl)
EP (1) EP1378528B1 (pl)
JP (1) JP2006514123A (pl)
KR (1) KR100699697B1 (pl)
CN (1) CN1325528C (pl)
AT (1) ATE293134T1 (pl)
AU (1) AU2003239633B2 (pl)
BR (1) BR0312021A (pl)
DE (1) DE60203707T2 (pl)
ES (1) ES2241977T3 (pl)
PL (1) PL373793A1 (pl)
RU (1) RU2285013C2 (pl)
WO (1) WO2004000902A1 (pl)

Families Citing this family (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1297575C (zh) * 2004-04-12 2007-01-31 中国石油化工股份有限公司 用于乙烯聚合或共聚合的催化剂组分及其催化剂
PL1773892T5 (pl) 2004-07-07 2014-09-30 Dow Global Technologies Llc Wielostopniowy sposób wytwarzania kompozycji polimerów etylenu
ES2635099T3 (es) * 2004-10-04 2017-10-02 Borealis Technology Oy Película
GB0421997D0 (en) * 2004-10-04 2004-11-03 Borealis Tech Oy Film
EP1674490A1 (en) * 2004-12-23 2006-06-28 Borealis Technology Oy Copolymer
EP1739110B2 (en) * 2005-06-30 2014-07-23 Borealis Technology Oy Polyethylene composition of improved processability
EP1839742A1 (en) * 2006-03-30 2007-10-03 Total Petrochemicals Research Feluy Flushing in a multiple loop reactor
US20100069580A1 (en) * 2006-06-21 2010-03-18 Total Petrochemcials Research Feluy Catalyst composition for the (co) polymerization of propylene
DE602006009412D1 (de) * 2006-12-21 2009-11-05 Borealis Tech Oy Film
EP1950241A1 (en) 2007-01-25 2008-07-30 Borealis Technology Oy Multimodal medium density polyethylene polymer composition
KR101032210B1 (ko) * 2007-04-18 2011-05-02 주식회사 엘지화학 폴리에틸렌 수지, 이의 제조방법 및 이로부터 제조된가교화된 폴리에틸렌 파이프
ATE491647T1 (de) 2007-08-10 2011-01-15 Borealis Tech Oy Artikel der eine polypropylenzusammensetzung beinhaltet
US20100280206A1 (en) 2007-11-09 2010-11-04 Borealis Technology Oy Polyethylene copolymer
EP2067799A1 (en) 2007-12-05 2009-06-10 Borealis Technology OY Polymer
EP2077284B1 (en) 2008-01-07 2011-11-30 Borealis Technology Oy Use of an improved solid vanadium-containing Ziegler-Natta catalyst system for producing ethylene polymer compositions in a multistage process
US8022154B2 (en) * 2008-11-06 2011-09-20 Exxonmobil Chemical Patents Inc. Ethylene polymers, their production and use
EP2354184B1 (en) 2010-01-29 2012-08-22 Borealis AG Polyethylene moulding composition with improved stress crack/stiffness relationship and impact resistance
EP2354183B1 (en) 2010-01-29 2012-08-22 Borealis AG Moulding composition
US9358515B2 (en) 2010-02-03 2016-06-07 Chevron Phillips Chemical Company Lp Compressible liquid diluent in polyolefin polymerization
CN103254342B (zh) * 2012-02-17 2015-10-21 中国石油化工股份有限公司 用于制造薄膜的双峰线型低密度聚乙烯组合物的制备方法
ES2613070T3 (es) 2012-11-09 2017-05-22 Abu Dhabi Polymers Company Limited (Borouge) Tubería de riego por goteo que comprende una composición polimérica que comprende una resina base de polietileno multimodal
ES2604934T3 (es) 2012-11-09 2017-03-10 Abu Dhabi Polymers Company Limited (Borouge) Composición polimérica que comprende una mezcla de un polietileno multimodal y un polímero de etileno adicional adecuado para la fabricación de un tubo de riego por goteo
EP2796472B1 (en) * 2013-04-22 2017-06-28 Borealis AG Two-stage process for producing polypropylene compositions
WO2015012963A1 (en) * 2013-07-25 2015-01-29 Exxonmobil Chemical Patents Inc. Methods for polyolefin polymerization with high activity catalyst systems
EP2883887A1 (en) 2013-12-13 2015-06-17 Borealis AG Multistage process for producing polyethylene compositions
EP2883885A1 (en) * 2013-12-13 2015-06-17 Borealis AG Multistage process for producing polyethylene compositions
KR101698669B1 (ko) 2015-02-11 2017-01-20 허순옥 육묘용 포트 플레이트
ES2707391T3 (es) * 2015-06-23 2019-04-03 Borealis Ag Procedimiento para la producción de resinas de LLDPE
EP3241611B1 (en) 2016-05-02 2020-03-04 Borealis AG A process for feeding a polymerisation catalyst
EA201892621A1 (ru) 2016-06-03 2019-06-28 Бореалис Аг Многослойная структура
WO2018089193A1 (en) 2016-11-08 2018-05-17 Univation Technologies, Llc Polyethylene composition
EP3538570B1 (en) 2016-11-08 2022-05-18 Univation Technologies, LLC Polyethylene composition
RU2019117039A (ru) 2016-11-25 2020-12-25 Бореалис Аг Способ получения полиолефиновой композиции для пленки и полученные из нее пленки
WO2018106388A1 (en) 2016-12-05 2018-06-14 Exxonmobil Chemical Patents Inc. Broad orthogonal distribution metallocene polyethylenes for films
SG11202002090SA (en) 2017-09-11 2020-04-29 Univation Tech Llc Carbon black-containing bimodal polyethylene composition
CN111315567B (zh) 2017-10-24 2022-02-25 博里利斯股份公司 多层聚合物膜
EP3749707A1 (en) 2018-02-05 2020-12-16 ExxonMobil Chemical Patents Inc. Enhanced processability of lldpe by addition of ultra-high molecular weight high density polyethylene
US11827725B2 (en) 2018-03-28 2023-11-28 Univation Technologies Llc Multimodal polyethylene composition
EP3830140A1 (en) 2018-08-02 2021-06-09 Borealis AG Process for polymerizing ethylene in a multi-stage polymerization process
WO2020083902A1 (en) 2018-10-26 2020-04-30 Abu Dhabi Polymers Co. Ltd (Borouge) L.L.C. Multi-layered article with improved adhesion
EP3887410A1 (en) 2018-11-28 2021-10-06 Abu Dhabi Polymers Co. Ltd (Borouge) L.L.C. Polyethylene composition for film applications
WO2020136165A1 (en) 2018-12-28 2020-07-02 Borealis Ag A process for producing polyolefin film composition and films prepared thereof
WO2020136164A1 (en) 2018-12-28 2020-07-02 Borealis Ag A process for producing polyolefin film composition and films prepared thereof
EP3980264A1 (en) 2019-06-07 2022-04-13 Borealis AG Multilayer machine direction oriented films for sealing
CA3172229A1 (en) 2020-04-01 2021-10-07 Swapnil B. CHANDAK Bimodal linear low density polyethylene copolymer
WO2022008608A1 (en) 2020-07-10 2022-01-13 Borealis Ag Polyolefin composition with improved resistance to high temperature
US20230257489A1 (en) 2020-07-10 2023-08-17 Borealis Ag Polyethylene Pipe Resin with High Resistance to Slow Crack Growth
WO2022034168A1 (en) 2020-08-12 2022-02-17 Borealis Ag Multilayer film with low seal initiation temperature
EP3988587A1 (en) 2020-10-26 2022-04-27 Borealis AG Polyolefin pipe resin with very good sagging and slow crack growth resistance
EP4251663A1 (en) 2020-11-27 2023-10-04 Borealis AG Process
EP4019583B1 (en) 2020-12-28 2024-04-10 ABU DHABI POLYMERS CO. LTD (BOROUGE) - Sole Proprietorship L.L.C. Polyethylene composition for film applications with improved toughness and stiffness
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
EP4092079A1 (en) 2021-05-21 2022-11-23 Borealis AG Process for producing polyethylene pipes with high pressure resistance and polyethylene pipes obtained thereby
CN117480191A (zh) 2021-06-11 2024-01-30 博里利斯股份公司 一种生产多峰乙烯聚合物的方法以及由其制备的薄膜
EP4116359B1 (en) 2021-07-07 2024-03-13 Borealis AG Monolayer blown film
EP4151677A1 (en) 2021-09-21 2023-03-22 Borealis AG Biaxially oriented film
EP4163323B1 (en) 2021-10-07 2024-05-29 Borealis AG Biaxially oriented film
WO2023117419A1 (en) 2021-12-23 2023-06-29 Borealis Ag Multi-layer film structure comprising multimodal ethylene copolymers and recycled ldpe for collation-shrink films
KR20240107351A (ko) 2021-12-23 2024-07-09 보레알리스 아게 매우 좋은 충격 특성 및 저속 균열 성장 저항성을 가지는 파이프용 중합체 조성물
EP4209546A1 (en) 2022-01-10 2023-07-12 Abu Dhabi Polymers Co. Ltd (Borouge) LLC Polyethylene pipe resin with improved long term hydrostatic strength
EP4219602A1 (en) 2022-01-28 2023-08-02 Borealis AG Polyethylene blend for a film layer
EP4234627A1 (en) 2022-02-25 2023-08-30 Borealis AG A polyethylene composition with improved stiffness and toughness
EP4234626B1 (en) 2022-02-25 2024-07-03 Borealis AG A polyethylene composition with improved stiffness and toughness
EP4234614A1 (en) 2022-02-25 2023-08-30 Borealis AG A film comprising a polyethylene composition having improved gloss
EP4239015B1 (en) 2022-03-02 2024-05-22 Borealis AG Monoaxially oriented film comprising a polyethylene composition
EP4239014A1 (en) 2022-03-02 2023-09-06 Borealis AG Film comprising a polyethylene composition
EP4245805B1 (en) 2022-03-18 2024-09-18 Borealis AG Polyethylene blend for a film layer
WO2023194336A1 (en) 2022-04-06 2023-10-12 Borealis Ag Multilayered film
WO2023194335A1 (en) 2022-04-06 2023-10-12 Borealis Ag Multilayered film
WO2023198579A1 (en) 2022-04-11 2023-10-19 Borealis Ag Multilayer film
EP4275889B1 (en) 2022-05-12 2024-10-16 Borealis AG Oriented multilayered film
EP4296298A1 (en) 2022-06-22 2023-12-27 Abu Dhabi Polymers Co. Ltd (Borouge) Llc. Enhanced greenhouse films with morphology driven reinforcement and differential scattering
WO2024003206A1 (en) 2022-07-01 2024-01-04 Borealis Ag Polyethylene copolymer for a film layer
EP4306442A1 (en) 2022-07-14 2024-01-17 Borealis AG Composition
EP4306444A1 (en) 2022-07-14 2024-01-17 Borealis AG Composition
EP4344869A1 (en) 2022-09-30 2024-04-03 Borealis AG Multimodal ethylene copolymer composition and films comprising the same
WO2024083689A1 (en) 2022-10-18 2024-04-25 Borealis Ag Multilayer film
EP4386046A1 (en) 2022-12-16 2024-06-19 Borealis AG Composition
EP4393989A1 (en) 2022-12-27 2024-07-03 Borealis AG Use of a magnesium hydroxide filler in highly track resistant polyethylene compositions
EP4403598A1 (en) 2023-01-23 2024-07-24 Borealis AG Polymer composition comprising recycled low density polyethylene for packaging applications
WO2024170345A1 (en) 2023-02-14 2024-08-22 Borealis Ag Polyethylene blend for a film layer
EP4417629A1 (en) 2023-02-14 2024-08-21 Borealis AG Polyethylene blend for a film layer
WO2024170344A1 (en) 2023-02-14 2024-08-22 Borealis Ag Polyethylene blend for a film layer
EP4431552A1 (en) 2023-03-14 2024-09-18 Borealis AG Biaxially oriented polyethylene film with improved stiffness

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI86867C (fi) * 1990-12-28 1992-10-26 Neste Oy Flerstegsprocess foer framstaellning av polyeten
US5514455A (en) * 1994-07-08 1996-05-07 Union Carbide Chemicals & Plastics Technology Corporation Film extruded from an in situ blend of ethylene copolymers
FI981034A (fi) * 1998-05-08 1999-11-09 Borealis Polymers Oy HD-polyeteenikoostumukset ja menetelmä niiden valmistamiseksi
FI990003A (fi) * 1999-01-04 2000-07-05 Borealis Polymers Oy Polymeerikoostumus, menetelmä sen valmistamiseksi ja siitä valmistetut kalvot

Also Published As

Publication number Publication date
KR20050016553A (ko) 2005-02-21
JP2006514123A (ja) 2006-04-27
DE60203707T2 (de) 2006-03-02
EP1378528B1 (en) 2005-04-13
ATE293134T1 (de) 2005-04-15
CN1662570A (zh) 2005-08-31
EP1378528A1 (en) 2004-01-07
AU2003239633A1 (en) 2004-01-06
US7576166B2 (en) 2009-08-18
DE60203707D1 (de) 2005-05-19
AU2003239633B2 (en) 2006-06-01
WO2004000902A1 (en) 2003-12-31
CN1325528C (zh) 2007-07-11
RU2285013C2 (ru) 2006-10-10
BR0312021A (pt) 2005-03-22
US20060167192A1 (en) 2006-07-27
RU2004137276A (ru) 2005-08-10
KR100699697B1 (ko) 2007-03-26
ES2241977T3 (es) 2005-11-01

Similar Documents

Publication Publication Date Title
PL373793A1 (pl) Sposób wytwarzania kompozycji liniowego polietylenu o małej gęstości
CA2199078C (en) High activity staged reactor process
MXPA05012157A (es) Composicion de polimero y procedimiento para fabricar polietileno de alta densidad-de alto peso molecular y peliculas del mismo.
US5284613A (en) Producing blown film and blends from bimodal high density high molecular weight film resin using magnesium oxide-supported Ziegler catalyst
PL163483B1 (en) Method for polimerization and a polimerized product in form of a film
RU2007149521A (ru) Полиэтиленовые трубы
CA2311115A1 (en) Staged reactor process
RU2004102045A (ru) Статистический сополимер пропилена и способ его получения
AU2006246039C1 (en) Polyethylene resin with narrow particle size distribution
DE60005155D1 (de) Polymerzusammensetzung, verfahren zu ihrer herstellung und daraus hergestellte filme
RU2007104590A (ru) Многостадийный способ получения композиций этиленового полимера
ZA200006010B (en) Process for producing a homogeneous polyethylene material in the presence of catalyst.
MY196161A (en) Polyethylene Composition for Film Applications
MY128257A (en) Process for the manufacture of a composition comprising ethylene polymers
AU2001240711A1 (en) Process for producing a polyethylene coating on a substrate
ES2153497T3 (es) Nuevo compuesto de polimeros, con distribucion de pesos moleculares amplia.
EP1849805A4 (en) ETHYLENIC RESIN AND FORM BODY OBTAINED THEREFROM
WO1995010548A1 (en) Process for producing polyethylene having a broad molecular weight distribution
MX2022001924A (es) Sistema catalizador de metaloceno para producir copolimeros de lldpe con resistencia al desgarro y baja opacidad.
GB0217520D0 (en) Product
JP2005298811A (ja) ポリエチレン系重合体組成物
RU2009132672A (ru) Мономодальный сополимер этилена для формования под давлением и способ его производства
AU2238900A (en) Staged reactor process
JPS6026051A (ja) ポリエチレン系組成物
AU730068B2 (en) A process for preparing an in situ polyethylene blend