Claims
- 1. A process for producing an olefinic polymer, which comprises the step of polymerizing an .alpha.-olefin in the presence of a catalyst for producing a poly-.alpha.-olefin, which comprises an organometallic polymer of the formula (1):
- --�O--M.sup.1 R.sup.1 R.sup.2 M.sup.2 X.sub.2 !.sub.n -- (1)
- wherein M.sup.1 represents an element of group IVB of the periodic table, R.sup.1 and R.sup.2 each represents an organic ligand selected from the group consisting of a cyclopentadienyl group, an indenyl group, a fluorenyl group and derivatives of these groups, said derivatives being selected from the group consisting of 1,2,3,4-tetramethylcyclopentadienyl, 2,3,5-trimethylcyclopentadienyl, 3,4-dimethylcyclopentadienyl, t-butylcyclopentadienyl, 2,4,7-trimethylindenyl, tetrahydroindenyl, 2-methylindenyl, 2-ethyl-4-phenylindenyl and 1-methylfluorenyl, M.sup.2 represents a transition metal element of group IVA of the periodic table, X represents a halogen atom, and n represents a positive number of 4 to 18 and, as a co-catalyst, a trialkylaluminum compound of the formula (2):
- Al(R.sup.3).sub.3 ( 2)
- wherein R.sup.3 represents an alkyl group having 1 to 10 carbon atoms, or a water-modified organoaluminum compound obtained by modifying the trialkylaluminum compound with water.
- 2. The process as claimed in claim 1, wherein at least one of R.sup.1 and R.sup.2 represent an organic ligand(s) selected from the group consisting of a cyclopentadienyl group, the derivatives of the cyclopentadienyl group, the derivates of the indenyl group and the derivatives of the fluorenyl group.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7-232370 |
Sep 1995 |
JPX |
|
Parent Case Info
This is a division of Ser. No. 08/707,522, filed Sep. 4, 1996 now U.S. Pat. No. 5,677,255.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5409874 |
Imuta et al. |
Apr 1995 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
707522 |
Sep 1996 |
|