JPS57128707A - Preparation of polyethylene by multistage polymerization - Google Patents

Preparation of polyethylene by multistage polymerization

Info

Publication number
JPS57128707A
JPS57128707A JP1397981A JP1397981A JPS57128707A JP S57128707 A JPS57128707 A JP S57128707A JP 1397981 A JP1397981 A JP 1397981A JP 1397981 A JP1397981 A JP 1397981A JP S57128707 A JPS57128707 A JP S57128707A
Authority
JP
Japan
Prior art keywords
stage
compound
polymerization
solid product
metallic
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
JP1397981A
Other languages
Japanese (ja)
Other versions
JPS6366324B2 (en
Inventor
Masahito Harada
Kazuyuki Watabe
Jun Masuda
Sadahiko Yamada
Atsushi Suzuki
Nobuya Tabata
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.)
JNC Corp
Original Assignee
Chisso Corp
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 Chisso Corp filed Critical Chisso Corp
Priority to JP1397981A priority Critical patent/JPS57128707A/en
Publication of JPS57128707A publication Critical patent/JPS57128707A/en
Publication of JPS6366324B2 publication Critical patent/JPS6366324B2/ja
Granted legal-status Critical Current

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Landscapes

  • Polymerisation Methods In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

PURPOSE: To obtain polyethylene having a wide distribution of molecular weight, by the multistage polymerization of ethylene in the presence of a catalyst containing a specific solid product and an organoaluminum compound in combination at a low temperature in a slight amount of a solvent to prepare a low- molecular polymer in the first stage and a high polymer in the second stage.
CONSTITUTION: The polymerization in the first stage is carried out in the presence of a catalyst consisting of (A) a solid product obtained by reacting a trivalent metallic halide, e.g. AlCl3, with a bivalent metallic (hydr)oxide, e.g. Mg(OH)2, and (B) a solid product supporting a transition compound prepared from an electron donative compound, e.g. chain dimethylpolysiloxane, a transition metallic compound of Group IVa or Va, e.g. TiCl4, (C) an organoaluminum compound, e.g. (C2H5)3Al, in combination in a saturated hydrocarbon solvent at 50W120°C and 5W70kg/cm2 at a molar ratio between ethylene (E) in the vapor phase and H2 of 1:(3W7) while feeding 30W90%, based on the total amount of (E) to be fed, (E) thereto. The polymerization in the second stage is subsequently carried out while keeping the molar ratio between (E) and H2 at 1:(0.001W 0.5) and feeding 10W70%, based on the total amount of (E) to be fed, (E) thereto.
COPYRIGHT: (C)1982,JPO&Japio
JP1397981A 1981-02-02 1981-02-02 Preparation of polyethylene by multistage polymerization Granted JPS57128707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1397981A JPS57128707A (en) 1981-02-02 1981-02-02 Preparation of polyethylene by multistage polymerization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1397981A JPS57128707A (en) 1981-02-02 1981-02-02 Preparation of polyethylene by multistage polymerization

Publications (2)

Publication Number Publication Date
JPS57128707A true JPS57128707A (en) 1982-08-10
JPS6366324B2 JPS6366324B2 (en) 1988-12-20

Family

ID=11848335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1397981A Granted JPS57128707A (en) 1981-02-02 1981-02-02 Preparation of polyethylene by multistage polymerization

Country Status (1)

Country Link
JP (1) JPS57128707A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156106A (en) * 1985-12-28 1987-07-11 Mitsui Petrochem Ind Ltd Production of polyolefin having improved fish-eye level
JP2007514813A (en) * 2003-12-19 2007-06-07 バセル ポリオレフィン ジーエムビーエイチ Process for producing ethylene (co) polymer
JP2012522096A (en) * 2009-04-02 2012-09-20 トータル・ペトロケミカルズ・リサーチ・フエリユイ How to optimize energy consumption in the extrusion process
JP2019526688A (en) * 2016-09-12 2019-09-19 タイ ポリエチレン カンパニー リミテッド High performance multimodal ultra high molecular weight polyethylene
JP2019526684A (en) * 2016-09-12 2019-09-19 タイ ポリエチレン カンパニー リミテッド Multimodal polyethylene pipe
JP2019526686A (en) * 2016-09-12 2019-09-19 タイ ポリエチレン カンパニー リミテッド Multimodal polyethylene pipe
US11952480B2 (en) 2018-02-05 2024-04-09 Exxonmobil Chemical Patents Inc. Enhanced processability of LLDPE by addition of ultra-high molecular weight density polyethylene

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03121927A (en) * 1989-10-06 1991-05-23 Nissan Motor Co Ltd Detachable hatch roof for automobile

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62156106A (en) * 1985-12-28 1987-07-11 Mitsui Petrochem Ind Ltd Production of polyolefin having improved fish-eye level
JP2007514813A (en) * 2003-12-19 2007-06-07 バセル ポリオレフィン ジーエムビーエイチ Process for producing ethylene (co) polymer
JP4790627B2 (en) * 2003-12-19 2011-10-12 バーゼル・ポリオレフィン・ゲーエムベーハー Process for producing ethylene (co) polymer
JP2012522096A (en) * 2009-04-02 2012-09-20 トータル・ペトロケミカルズ・リサーチ・フエリユイ How to optimize energy consumption in the extrusion process
JP2019526688A (en) * 2016-09-12 2019-09-19 タイ ポリエチレン カンパニー リミテッド High performance multimodal ultra high molecular weight polyethylene
JP2019526684A (en) * 2016-09-12 2019-09-19 タイ ポリエチレン カンパニー リミテッド Multimodal polyethylene pipe
JP2019526686A (en) * 2016-09-12 2019-09-19 タイ ポリエチレン カンパニー リミテッド Multimodal polyethylene pipe
US11952480B2 (en) 2018-02-05 2024-04-09 Exxonmobil Chemical Patents Inc. Enhanced processability of LLDPE by addition of ultra-high molecular weight density polyethylene

Also Published As

Publication number Publication date
JPS6366324B2 (en) 1988-12-20

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