Claims
- 1. A process for producing terpolymers of ethylene, propylene and another alpha-olefin, which comprises
- (a) preliminarily activating a catalyst consisting of a titanium trichloride composition obtained by reacting a reaction product (I) of (A.sub.2) an organoaluminum compound with an electron donor, with TiCl.sub.4 to obtain a solid product (II), which is further reacted with an electron donor and an electron acceptor and an organoaluminum halide expressed by the general formula AlR.sub.1 R.sub.2 X wherein R.sub.1 and R.sub.2 are the same or different alkyl, aryl or alkaryl groups and X represents a halogen atom, with an alpha-olefin of 2 to 12 carbon and a reaction product of a trialkylaluminum and an aromatic ester, and
- (b) copolymerizing 1.0 to 3.5% by weight of ethylene, 88 to 96% by weight of propylene and 1.0 to 10.0% by weight of another alpha-olefin of 4 to 12 carbon atoms based on the total weight of these monomers, in the presence of the preliminarily activated catalyst of step (a).
- 2. A process according to claim 1 wherein said preliminary activation is carried out so that the amount of poly-.alpha.-olefin formed in the preliminary activation corresponds to 1 to 5% by weight based on the weight of the terpolymers after said copolymerization.
- 3. A process according to claim 1 wherein said copolymerization is carried out at a temperature of 45.degree. to 65.degree. C.
- 4. A process according to claim 1 wherein said preliminary activation is carried out by reacting said .alpha.-olefin with the combination of a titanium trichloride composition with an organoaluminum halide expressed by said general formula AlR.sub.1 R.sub.2 X, and thereafter adding to the resulting reaction product, a reaction product of a trialkylaluminum with an aromatic ester.
- 5. A process according to claim 1 wherein said preliminary activation is carried out by adding a titanium trichloride composition, an organoaluminum halide expressed by the general formula AlR.sub.1 R.sub.2 X, and a reaction product of a trialkylaluminum with an aromatic ester in the presence of said .alpha.-olefin.
- 6. A process according to claim 1 wherein said preliminary activation is carried out by reacting said .alpha.-olefin with a mixture of a titanium trichloride composition, an organoaluminum halide, and a reaction product of a trialkylaluminum with an aromatic ester.
- 7. A process according to claim 1 wherein said aromatic ester is an aromatic carboxylic acid ester.
Priority Claims (1)
Number |
Date |
Country |
Kind |
55-47742 |
Apr 1980 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 252,391, filed Apr. 9, 1981, now abandoned, and the benefits of 35 USC 120 are claimed relative to it.
US Referenced Citations (11)
Continuations (1)
|
Number |
Date |
Country |
Parent |
252391 |
Apr 1981 |
|