JPS5653118A - Preparation of propylene-ethylene block copolymer - Google Patents

Preparation of propylene-ethylene block copolymer

Info

Publication number
JPS5653118A
JPS5653118A JP12869779A JP12869779A JPS5653118A JP S5653118 A JPS5653118 A JP S5653118A JP 12869779 A JP12869779 A JP 12869779A JP 12869779 A JP12869779 A JP 12869779A JP S5653118 A JPS5653118 A JP S5653118A
Authority
JP
Japan
Prior art keywords
propylene
ratio
copolymer
ethylene
ticl
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
JP12869779A
Other languages
Japanese (ja)
Other versions
JPS6239165B2 (en
Inventor
Masayoshi Hasuo
Sadanori Suga
Yoshiteru Kobayashi
Hisashi Kitada
Yasuo Maruyama
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.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei 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 Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP12869779A priority Critical patent/JPS5653118A/en
Publication of JPS5653118A publication Critical patent/JPS5653118A/en
Publication of JPS6239165B2 publication Critical patent/JPS6239165B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prepare a copolymer having excellent rigidity, impact strength and surface appearance, and low brittle temperature, by the block polymerization of a plurality of ethylene-propylene copolymers having different compositions to the main chain of polypropylene using a specific catalyst.
CONSTITUTION: The objective copolymer having a melt flow index (MI) of ≤1 is prepared by (1) polymerizing liquefied propylene in the presence of hydrogen and a solid TiCl3 catalyst composed of TiCl3 and an organoaluminum compound to obtain the first stage polymer having an MI of 1W60, (2) preparing a copolymer having an MI of ≤0.1 from propylene (P) and ethylene (E) at a P/(P+E) ratio of ≤0.95 (molar ratio) keeping the partial pressure of P to ≥0.5kg/cm2, and (3) continuing the block polymerization maintaining the P/(P+E) ratio below that the step (2). The amount (wt. ratio) of the polymers reacted in the (1) to (3) steps are (70W 90)/(30W20)/(5W20).
COPYRIGHT: (C)1981,JPO&Japio
JP12869779A 1979-10-05 1979-10-05 Preparation of propylene-ethylene block copolymer Granted JPS5653118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12869779A JPS5653118A (en) 1979-10-05 1979-10-05 Preparation of propylene-ethylene block copolymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12869779A JPS5653118A (en) 1979-10-05 1979-10-05 Preparation of propylene-ethylene block copolymer

Publications (2)

Publication Number Publication Date
JPS5653118A true JPS5653118A (en) 1981-05-12
JPS6239165B2 JPS6239165B2 (en) 1987-08-21

Family

ID=14991176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12869779A Granted JPS5653118A (en) 1979-10-05 1979-10-05 Preparation of propylene-ethylene block copolymer

Country Status (1)

Country Link
JP (1) JPS5653118A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS585321A (en) * 1981-07-03 1983-01-12 Mitsui Toatsu Chem Inc Production of propylene/ethylene block copolymer
US4760113A (en) * 1985-12-17 1988-07-26 Chisso Corporation Process for continuously producing a high-melt viscoelastic ethylene-propylene copolymer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS585321A (en) * 1981-07-03 1983-01-12 Mitsui Toatsu Chem Inc Production of propylene/ethylene block copolymer
JPS6358165B2 (en) * 1981-07-03 1988-11-15 Mitsui Toatsu Chemicals
US4760113A (en) * 1985-12-17 1988-07-26 Chisso Corporation Process for continuously producing a high-melt viscoelastic ethylene-propylene copolymer

Also Published As

Publication number Publication date
JPS6239165B2 (en) 1987-08-21

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