JPS57195718A - Production of propylene block copolymer - Google Patents
Production of propylene block copolymerInfo
- Publication number
- JPS57195718A JPS57195718A JP8111081A JP8111081A JPS57195718A JP S57195718 A JPS57195718 A JP S57195718A JP 8111081 A JP8111081 A JP 8111081A JP 8111081 A JP8111081 A JP 8111081A JP S57195718 A JPS57195718 A JP S57195718A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- polypropylene
- catalytic component
- solid catalytic
- charged
- 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)
- Graft Or Block Polymers (AREA)
Abstract
PURPOSE: To obtain a copolymer excellent in impact resistance and rigidity, by forming a specified amount of polypropylene during a period of time during which the 1st reaction tank is not charged with the solid catalytic component of a stereoregular polymerization catalyst and the polypropylene slurry is not discharged to the 2nd reaction tank.
CONSTITUTION: In a process for continuously producing a propylene block copolymer by carrying out a multistage polymerization by using a stereoregular polymerization catalyst and two or more polymerization tanks, the 1st tank only is intermittently charged with the solid catalytic component of the stereoregular polymerization catalyst and the polypropylene slurry is intermittently discharged from the 1st tank to the 2nd tank, whereby 5W50wt% of the total weight of the polypropylene formed per unit solid catalytic component is formed during a period of time during which the 1st tank is not charged with the solid catalytic component and the polypropylene slurry is not discharged to the 2nd tank. The monomer used consists mainly of propylene and may further contain, as comonomers, ethylene or butene-1 and further an extremely small amount of 4C or higher α-olefin.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8111081A JPS57195718A (en) | 1981-05-29 | 1981-05-29 | Production of propylene block copolymer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8111081A JPS57195718A (en) | 1981-05-29 | 1981-05-29 | Production of propylene block copolymer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57195718A true JPS57195718A (en) | 1982-12-01 |
JPS6138926B2 JPS6138926B2 (en) | 1986-09-01 |
Family
ID=13737234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8111081A Granted JPS57195718A (en) | 1981-05-29 | 1981-05-29 | Production of propylene block copolymer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57195718A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829811A (en) * | 1981-08-13 | 1983-02-22 | Mitsubishi Chem Ind Ltd | Continuous production of propylene/ethylene block copolymer |
EP0225099A2 (en) * | 1985-11-15 | 1987-06-10 | Chisso Corporation | Process for continuously producing a propylene-ethylene block copolymer |
EP0678373A2 (en) | 1989-04-07 | 1995-10-25 | Chisso Corporation | Dulled stretched molding and process for producing the same |
US5854355A (en) * | 1995-04-24 | 1998-12-29 | Chisso Corporation | Continuous process for preparation of highly rigid propylene-ethylene block copolymers |
-
1981
- 1981-05-29 JP JP8111081A patent/JPS57195718A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829811A (en) * | 1981-08-13 | 1983-02-22 | Mitsubishi Chem Ind Ltd | Continuous production of propylene/ethylene block copolymer |
EP0225099A2 (en) * | 1985-11-15 | 1987-06-10 | Chisso Corporation | Process for continuously producing a propylene-ethylene block copolymer |
EP0678373A2 (en) | 1989-04-07 | 1995-10-25 | Chisso Corporation | Dulled stretched molding and process for producing the same |
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 |
---|---|
JPS6138926B2 (en) | 1986-09-01 |
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