JPS57174311A - Production of propylene/ethylene block copolymer - Google Patents
Production of propylene/ethylene block copolymerInfo
- Publication number
- JPS57174311A JPS57174311A JP6022781A JP6022781A JPS57174311A JP S57174311 A JPS57174311 A JP S57174311A JP 6022781 A JP6022781 A JP 6022781A JP 6022781 A JP6022781 A JP 6022781A JP S57174311 A JPS57174311 A JP S57174311A
- Authority
- JP
- Japan
- Prior art keywords
- propylene
- stage
- compound
- halogen
- ethylene
- 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
Landscapes
- Polymerisation Methods In General (AREA)
- Polymerization Catalysts (AREA)
- Graft Or Block Polymers (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
PURPOSE: To produce the titled copolymer excellent in low-temperature brittleness and impact resistance, by adding a molecular halogen or a compound which can increase the halogen content of an organic Al compound to a level higher than that in the first stage, in the second stage of the propylene/ethylene copolymerization.
CONSTITUTION: The first stage polymerization is carried out by use of a catalyst system based ona Ti-containing solid catalytic component and an organic Al compound cocatalyst of formulaI, wherein R1 is a 1W20C hydrocarbon, X is a halogen and 3≥m>1.5. Namely, propylene alone or propylene and ethylene are (co)polymerized under contitions including a propylene concentration of above 90mol% based on the sum of propylene and ethylene in a vapor phase. Subsequently, in the second stage, propylene and ethylene are copolymerized in the presence of the above-mentioned catalyst system and the polymer under conditions including a propylene concentration in a vapor phase of below 90mol%. At this time, there is added a molecular halogen or a halogen-containing compound capable of reacting with a compound of formulaIand reducing the number of m to a value lower than that in the first stage.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6022781A JPS57174311A (en) | 1981-04-21 | 1981-04-21 | Production of propylene/ethylene block copolymer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6022781A JPS57174311A (en) | 1981-04-21 | 1981-04-21 | Production of propylene/ethylene block copolymer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57174311A true JPS57174311A (en) | 1982-10-27 |
JPS6353207B2 JPS6353207B2 (en) | 1988-10-21 |
Family
ID=13136065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6022781A Granted JPS57174311A (en) | 1981-04-21 | 1981-04-21 | Production of propylene/ethylene block copolymer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57174311A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6147712A (en) * | 1984-08-15 | 1986-03-08 | Mitsubishi Petrochem Co Ltd | Preparation of propylene copolymer |
EP0202946A2 (en) * | 1985-05-23 | 1986-11-26 | Sumitomo Chemical Company, Limited | Alpha-olefin block copolymer particles and process for the production thereof |
US5219960A (en) * | 1989-11-20 | 1993-06-15 | Showa Denko K.K. | Process for producing olefin polymer |
US5461115A (en) * | 1993-11-10 | 1995-10-24 | Chisso Corporation | Continuous production process of a propylene-ethylene block copolymer |
US5854355A (en) * | 1995-04-24 | 1998-12-29 | Chisso Corporation | Continuous process for preparation of highly rigid propylene-ethylene block copolymers |
-
1981
- 1981-04-21 JP JP6022781A patent/JPS57174311A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6147712A (en) * | 1984-08-15 | 1986-03-08 | Mitsubishi Petrochem Co Ltd | Preparation of propylene copolymer |
JPH0410889B2 (en) * | 1984-08-15 | 1992-02-26 | ||
EP0202946A2 (en) * | 1985-05-23 | 1986-11-26 | Sumitomo Chemical Company, Limited | Alpha-olefin block copolymer particles and process for the production thereof |
US5219960A (en) * | 1989-11-20 | 1993-06-15 | Showa Denko K.K. | Process for producing olefin polymer |
US5461115A (en) * | 1993-11-10 | 1995-10-24 | Chisso Corporation | Continuous production process of a propylene-ethylene block copolymer |
US5854355A (en) * | 1995-04-24 | 1998-12-29 | Chisso Corporation | Continuous process for preparation of highly rigid propylene-ethylene block copolymers |
Also Published As
Publication number | Publication date |
---|---|
JPS6353207B2 (en) | 1988-10-21 |
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