Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2001-01-25
2002-12-10
Wu, David W. (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S155000, C526S160000, C526S161000, C526S943000, C526S133000, C556S053000
Reexamination Certificate
active
06492294
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a transition metal compound useful as an olefin polymerization catalyst component, an olefin polymerization catalyst using said transition metal compound and process for producing an olefin polymer using said olefin polymerization catalyst with a high activity.
2. Description of the Related Art
Many processes for producing an olefin polymer with a metallocene complex have been already reported. For example a process for producing an olefin polymer with a metallocene complex and an aluminoxane is reported in Japanese Patent Publication (Kokai) No.58-19306. The metallocene complex disclosed therein is a complex having only one transition metal atom in its molecule.
It is disclosed in Japanese Patent Publication (Kokai) No.4-91095 to use a metallocene complex having a structure in which two transition metal atoms are contained in its molecule and two &eegr;
5
-cyclopentadienyl groups coordinate on each of the transition metal atoms, as an olefin polymerization catalyst component.
However, when these metallocene complexes having the structure in which two &eegr;
5
-cyclopentadienyl groups coordinate on one transition metal atom are used as the olefin polymerization catalyst component, there are problems that the molecular weight of an olefin polymer obtained is low and the comonomer reaction rate in copolymerization is low, and the more improvement of activity has been desired from an industrial viewpoint.
Although metallocene complexes in which two transition metal atoms are contained in its molecule and only one &eegr;
5
-cyclopentadienyl group coordinates on each of transition metal atom are disclosed in Japanese Patent Publication (Kokai) Nos. 3-163088 and 3-188092, they are complexes having a peculiar structure in which excessive anionic ligands against the valence number of a transition metal atom are combined, and its polymerization activity is not confirmed.
Although a metallocene complex in which two transition metal atoms are contained in its molecule and only one &eegr;
5
-cyclopentadienyl group coordinates per one transition metal atom is disclosed in Japanese Patent Publication (Kokai) No.7-126315, it is a complex having a structure in which those two &eegr;
5
-cyclopentadienyl groups are linked, and there are problems in that the olefin polymerization catalyst using it as a catalyst component has low comonomer reaction rate in copolymerization and the melting point of a copolymer improvement of activity has been desired from an industrial viewpoint.
SUMMARY OF THE INVENTION
Under these situations, the objects of the present invention are to provide a transition metal compound useful as a highly active olefin polymerization catalyst component at an efficient reaction temperature in the industrial process of important olefin polymerization from an industrial view point, and to provide a highly active olefin polymerization catalyst using said transition metal compound and a process for producing an olefin polymer using said olefin polymerization catalyst.
In order to attain the above-mentioned objects, the present inventors have intensively studied a process for producing an olefin polymer using a metallocene transition metal compound, in particular, a mono cyclopentadienyl transition metal compound as one of catalyst components, and have thus completed the present invention.
The present invention relates to a transition metal compound represented by the general formula [I] or [II] described below, an olefin polymerization catalyst component comprising said transition metal compound, an olefin polymerization catalyst prepared by a process comprising contacting a transition metal compound selected from the group consisting of transition metal compounds represented by the general formulas [I] and [II], and [(B) described below and/or (C)] described below, and a process for producing an olefin polymer with said olefin polymerization catalyst.
(wherein M
1
indicates a transition metal atom of the Group IV of the Periodic Table or the Elements; A indicates an atom of the Group XVI of the Periodic Table of the Elements; J indicates an atom of the Group XIV of the Periodic Table of the Elements; Cp
1
indicates a group having a cyclopentadiene type anion skeleton; each of X
1
, R
1
, R
2
, R
3
, R
4
, R
5
and R
6
independently indicates a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an aryl group, a substituted silyl group, an alkoxy group, an aralkyloxy group, an aryloxy group or a di-substituted amino group; X
2
indicates an atom of Group XVI of the Periodic Table of the Elements; R
1
, R
2
, R
3
, R
4
, R
5
and R
6
may be optionally combined with each other to form a ring; and a plural number of M
1
, A, J, Cp
1
, X
1
, X
2
, R
1
, R
2
, R
3
, R
4
, R
5
and R
6
may be respectively the same or different.)
(B) at least one aluminum compound selected from (B1) to (B3) described below:
(B1) an organoaluminum compound indicated by the general formula E
1
a
AlZ
3-a
;
(B2) a cyclic aluminoxane having a structure indicated by the general formula {—Al(E
2
)—O—}
b
; and
(B3) a linear aluminoxane leaving a structure indicated by the general formula E
3
{—Al(E
2
)—O—}
c
AlE
3
2
(wherein each of E
1
, E
2
and E
3
is a hydrocarbon group, and all of E
2
, all of E
2
and all of E
3
may be the sane or different; Z represents a hydrogen atom or a halogen atom; and all of Z may be the same or different; a represents a number satisfying an expression of 0<a≦3; b represents an integer of 2 or more; and c represents an integer of 1 or more).
(C) any one of boron compounds of (C1) to (C3) described below:
(C1) a boron compound represented by the general formula BQ
1
Q
2
Q
3
;
(C2) a boron compound represented by the general formula G
+
(BQ
1
Q
2
Q
3
Q
4
)
−
; and
(C3) a boron compound represented by the general formula (L-H)
−
(BQ
1
Q
2
Q
3
Q
4
)
−
(wherein B is a boron atom in the trivalent valence state; Q
1
to Q
4
are a halogen atom, a hydrocarbon group, a halogenated hydrocarbon group, a substituted silyl group, an alkoxy group or a di substituted amino group which may be the same or different; G
+
is an inorganic or organic cation; L is a neutral Lewis base; and (L H)
+
is a Brnsted acid).
REFERENCES:
patent: 4542199 (1985-09-01), Kaminsky et al.
patent: 5703187 (1997-12-01), Timmers
patent: 6066704 (2000-05-01), Katayama et al.
patent: 6084046 (2000-07-01), Johoji et al.
patent: 6084048 (2000-07-01), Hozumi et al.
patent: 6121401 (2000-09-01), Yamamoto et al.
patent: 0 842 939 (1998-05-01), None
patent: 3-163088 (1991-07-01), None
patent: 3-188092 (1991-08-01), None
patent: 4-91095 (1992-03-01), None
patent: 58-19309 (1993-02-01), None
patent: 7-126315 (1995-05-01), None
US 5,168,111, 12/1992, Canich (withdrawn)
Abstract of Japan of JP 9176221 A, Jul. 8, 1997.
Abstract of Japan of 7126315 A, May 16, 1995.
Abstract of Japan of 4091095 A, Mar. 24, 1992.
Patent Abstracts of Japan, T. Noriyuki, “Olefin Polymerization Catalyst and Production of Olefin Polymer Using the Catalyst”, Publ. No. 07126315, Publ. Date: Nov. 1993.
Qian et al., “Syntheses, Structures and Reactions of Some New Benzyl-Substituted Cyclopentadienyl Titanium Complexes”, Journal of Organometallic Chemistry 547 (1997) pp. 263-279.
Hino Takahiro
Katayama Hiroaki
Oda Yoshiaki
Watanabe Tsuyoshi
Fitch Even Tabin & Flannery
Harlan R.
Sumitomo Chemical Company Limited
Wu David W.
LandOfFree
Transition metal compound, olefin polymerization catalyst... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transition metal compound, olefin polymerization catalyst..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transition metal compound, olefin polymerization catalyst... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2991066