Claims
- 1. A process for the preparation of a polyolefin by polymerization of an olefin of the formula R11—CH═CH—R12, in which R11 and R12 are identical or different and are a hydrogen atom or a C1-C14-alkyl radical, at a temperature of 0° C. to 150° C., under a pressure of 0.5 to 100 bar, in solution, in suspension or in the gas phase and in the present of a catalyst which consists essentially of a metallocene and an aluminoxane of the formula (II) for the linear type, and/or of the formula (III) for the cyclic type, in which, in the formulae (II) and (III), R10 is a C1-C6-alkyl group and n is an integer from 2 to 50, wherein the metallocene is wherein said metallocene is ethyl-ethylene(indenyl)2 zirconium dichloride.
- 2. The process as claimed in claim 1, wherein said aluminoxane is methyl aluminoxane.
- 3. A process for the preparation of a polyolefin by polymerization of an olefin of the formula R11—CH═CH—R12, in which R11 and R12 are identical or different and are a hydrogen atom or a C1-C14-alkyl radical, at a tenperature of 0° C. to 150° C., under a pressure of 0.5 to 100 bar, in solution, in suspension or in the gas phase and in the presence of a catalyst which consists essentially of a metallocene and an aluminoxane of the formula (II) for the linear type, and/or of the formula (III) for the cyclic type, in which, in the formulae (II) and (III), R10 is a C1-C6-alkyl group and n is an integer from 2 to 50, wherein said metallocene is racemic 1,2-diphenyl-ethylene-bis(1-indenyl)zirconium dichloride.
- 4. The process as claimed in claim 3, wherein said aluminoxane is methyl aluminoxane.
Parent Case Info
This application is a continuation of application Ser. No. 08/287,104 filed Aug. 8, 1994, now abandoned, which is a continuation of application Ser. No. 07/569,179 filed Aug. 17, 1990 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4769510 |
Kaminsky et al. |
Sep 1988 |
A |
5416178 |
Winter et al. |
May 1995 |
A |
Foreign Referenced Citations (4)
Number |
Date |
Country |
3726067 |
Feb 1989 |
DE |
0185918 |
Jul 1986 |
EP |
0 302 424 |
Feb 1989 |
EP |
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May 1989 |
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Continuations (2)
|
Number |
Date |
Country |
Parent |
08/287104 |
Aug 1994 |
US |
Child |
08/418847 |
|
US |
Parent |
07/569179 |
Aug 1990 |
US |
Child |
08/287104 |
|
US |