Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1996-03-29
1998-12-29
Wu, David W.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502152, 502155, 526126, 526127, 526160, 526170, 526172, 526943, C08F 464
Patent
active
058541659
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a transition metal compound, a compound which can be used as its material, a process for preparing each of these compounds, a catalyst for olefin polymerization using the transition metal compound, an olefin polymer obtained by the use of this catalyst, and a process for preparing the olefin polymer. More specifically, the present invention relates to a novel multiple crosslinking type transition metal compound (multiple crosslinking metallocene complex) useful as a component of a catalyst for olefin polymerization, a bisindenyl derivative usable as a ligand of this transition metal compound, its precursor, a process for efficiently preparing each of the transition metal compound and its precursor, a catalyst for polymerization which has a high activity and an excellent copolymerizability and which contains the transition metal compound and which is capable of forming an olefin polymer having a uniform composition and a narrow molecular weight distribution, an olefin homopolymer and an olefin copolymer obtained by the use of this catalyst for polymerization, and a process for efficiently preparing each of these olefin polymers.
BACKGROUND ART
Heretofore, as highly active soluble catalysts for olefin polymerization, catalysts comprising a combination of a transition metal compound and an aluminoxane are known (Japanese Patent Application Laid-open Nos. 19309/1983 and 217209/1985). Furthermore, it has been reported that cationic species are useful as active species of the soluble catalyst for p. 1953 (1960), and Vol. 107, p. 7219 (1985)!. In addition, examples where each of these active species is isolated and is applied to the olefin polymerization have been described in J. Am. Chem. Soc., Vol. 108, p. 7410 (1986), Japanese PCT Patent Application Laid-open No. 502636/1989, Japanese Patent Application Laid-open No. 139504/1991 and EP-A-O 468651. Other examples where this active species is used together with an organic aluminum compound have been described in Japanese Patent Application Laid-open No. 207704/1991 and WO 92-1723. Moreover, an example of a catalyst for olefin polymerization which comprises a transition metal compound having a ligand containing an --SO.sub.3 R group and an organic aluminum oxycompound has been described in EP-A-O No. 519746.
However, these catalysts do not always satisfy a catalytic activity for olefin polymerization, copolymerizability, and the uniformity and molecular weight distribution of an obtained polymer.
On the other hand, a transition metal compound having a bicyclopentadienyl group, i.e., a metallocene complex is particularly highly active and is known to be useful as a highly steric regular catalyst. This metallocene complex can be classified into a non-crosslinking type, a single crosslinking type and a multiple crosslinking type on the basis of the crosslinking structure of two cyclopentadienyl groups, but most of the conventional metallocene complexes are of the non-crosslinking type and the single crosslinking type.
Examples of the non-crosslinking type metallocene complex have been disclosed or reported in U.S. Pat. No. 5200537, Japanese Patent Application Laid-open Nos. 222177/1988, 222178/1988, 222179/1988, 301704/1989 and the like, and examples of the single crosslinking type metallocene complex have been disclosed or reported in Japanese Patent Application Laid-open Nos. 131488/1990 and 41303/1992, "Angew. Chem. Int. Ed. Engl.", Vol. 24, Vol. 6, p. 507 (1985) and the like.
On the contrary, with regard to the multiple crosslinking type (double crosslinking type) metallocene complexes, their synthetic examples are limited, and they are described only in WO 93-20113 and "Organometallics", Vol. 12, p. 1931 (1993). In addition, these publications have described a polymerization example of propylene in the presence of a dimethylsilylene double crosslinking type metallocene complex, but the heat stability of this catalyst itself is poor. Since this metallocene complex has a specific crosslinking structure, the iso
REFERENCES:
patent: 5496902 (1996-03-01), Evertz et al.
Hawley et al., Hawley's Condensed Chemical Dictionary, 7th edition, p. 749, 1987.
Halterman, Ronald L. "Synthesis and Applications of Chiral Cyclopentadienyl Complexes", pp. 965-994, Mar. 1992.
Mengele et al. Organometallic, 1993, 12, pp. 1931-1935, "ansa-metallocene Derivatives. Chiral Zironocene Complexes with two Dimethylsilylene Bridges".
Okamoto Takuji
Tani Noriyuki
Watanabe Masami
Yabunouchi Nobuhiro
Yokota Kiyohiko
Idemitsu Kosan Co. Ltd.
Wu David W.
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