JPS5661418A - Preparation of improved propylene-ethylene block copolymer - Google Patents
Preparation of improved propylene-ethylene block copolymerInfo
- Publication number
- JPS5661418A JPS5661418A JP13793179A JP13793179A JPS5661418A JP S5661418 A JPS5661418 A JP S5661418A JP 13793179 A JP13793179 A JP 13793179A JP 13793179 A JP13793179 A JP 13793179A JP S5661418 A JPS5661418 A JP S5661418A
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- propylene
- block copolymer
- copolymerized
- extent
- 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
Links
Abstract
PURPOSE: To obtain the titled block copolymer, excellent in rigidity, impact strength, luster, etc. and suitable as a car part, by copolymerizing three kinds of propylene-ethylene mixture in three steps by use of a stereoregular catalyst.
CONSTITUTION: In the first step, a propylene-ethylene mixture containing 0.1W 0.6wt% of ethylene, is copolymerized to an extent of 30W70wt% of the total polymer, at a polymerization temperature of about 40W80°C, at a polymerization pressure of about 1W35atm, in a hydrocarbon solvent, by use of a stereoregular catalyst (e.g., a combination of titanium trichloride and diethylaluminum chloride). Then in the second step, a propylene-ethylene mixture containing 1W9wt% of ethylene, is copolymerized to an extent of 20W50wt% of the total polymer, and in the third step, a propylene-ethylene mixture containing 17W40wt% of ethylene, is copolymerized to an extent of 5W25wt% of the total polymer, by use of said stereoregular catalyst, to obtain the titled block copolymer.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13793179A JPS5661418A (en) | 1979-10-24 | 1979-10-24 | Preparation of improved propylene-ethylene block copolymer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13793179A JPS5661418A (en) | 1979-10-24 | 1979-10-24 | Preparation of improved propylene-ethylene block copolymer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5661418A true JPS5661418A (en) | 1981-05-26 |
JPS629247B2 JPS629247B2 (en) | 1987-02-27 |
Family
ID=15210027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13793179A Granted JPS5661418A (en) | 1979-10-24 | 1979-10-24 | Preparation of improved propylene-ethylene block copolymer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5661418A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5767611A (en) * | 1980-10-15 | 1982-04-24 | Mitsubishi Petrochem Co Ltd | Preparation of propylene copolymer |
JPS58162621A (en) * | 1982-03-23 | 1983-09-27 | Mitsubishi Petrochem Co Ltd | Olefinic block copolymer |
WO2001074920A1 (en) * | 2000-03-31 | 2001-10-11 | Mitsui Chemicals, Inc. | Processes for producing polyolefin composition |
-
1979
- 1979-10-24 JP JP13793179A patent/JPS5661418A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5767611A (en) * | 1980-10-15 | 1982-04-24 | Mitsubishi Petrochem Co Ltd | Preparation of propylene copolymer |
JPH0379367B2 (en) * | 1980-10-15 | 1991-12-18 | Mitsubishi Petrochemical Co | |
JPS58162621A (en) * | 1982-03-23 | 1983-09-27 | Mitsubishi Petrochem Co Ltd | Olefinic block copolymer |
JPH0343292B2 (en) * | 1982-03-23 | 1991-07-02 | Mitsubishi Petrochemical Co | |
WO2001074920A1 (en) * | 2000-03-31 | 2001-10-11 | Mitsui Chemicals, Inc. | Processes for producing polyolefin composition |
US6472484B1 (en) | 2000-03-31 | 2002-10-29 | Mitsui Chemicals, Inc. | Processes for producing polyolefin composition |
Also Published As
Publication number | Publication date |
---|---|
JPS629247B2 (en) | 1987-02-27 |
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