JPS5653118A - Preparation of propylene-ethylene block copolymer - Google Patents
Preparation of propylene-ethylene block copolymerInfo
- 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
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
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)
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 |
-
1979
- 1979-10-05 JP JP12869779A patent/JPS5653118A/en active Granted
Cited By (3)
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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