Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Clay
Reexamination Certificate
1999-09-08
2001-07-03
Wu, David W. (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Clay
C502S084000, C502S102000, C502S103000, C502S117000, C502S118000, C502S104000, C502S109000, C526S127000, C526S129000
Reexamination Certificate
active
06255244
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a catalyst for polymerization of olefins or styrenes, and to a method for producing polymers. Precisely, the invention relates to a catalyst for polymerization of olefins or styrenes, which has the advantage of efficiently and inexpensively producing olefinic polymers or styrenic polymers, and also to a method for producing polymers in which is used the catalyst.
2. Description of the Background
Recently, catalysts for polymer production comprising, as the catalytic component, a transition metal compound having a &pgr;-ligand, which are referred to as metallocene catalysts, have been developed and used in producing olefinic polymers and styrenic polymers.
However, the catalysts require a large amount of a catalyst promoter such as aluminoxanes in order that they could display high polymerization activity. Therefore, the catalysts are problematic in that their costs are high and that a catalyst residue derived from the catalyst promoter used remains in the polymers produced to cause coloration of the polymers.
In order to reduce the amount of the catalyst promoter to be used, techniques of using clay, clay minerals and the like in place of aluminoxanes have been proposed (see Japanese Patent Laid-Open Nos. 301917/1993 and 136047/1994). At present, however, the techniques could not still give high-activity catalysts capable of overcoming the problems noted above.
SUMMARY OF THE INVENTION
Given that situation, the object of the present invention is to provide a catalyst for polymerization of olefins or styrenes, which has the advantage of efficiently and inexpensively producing olefinic polymers or styrenic polymers, and also to provide a method for producing polymers in which is used the catalyst. Especially for styrene monomers, the object of the invention is to provide a catalyst for polymerization of styrenes, which has the advantage of efficiently and inexpensively producing styrenic polymers essentially having a syndiotactic structure, and also to provide a method for producing such styrenic polymers in which is used the catalyst.
We, the present inventors have assiduously studied so as to attain the object noted above, and, as a result, have found that a polymerization catalyst as obtained through specific treatment of a transition metal compound has improved polymerization activity. On the basis of this finding, we have completed the present invention.
Specifically, the invention is to provide a catalyst for polymerization of olefins or styrenes, and a method for producing polymers, which are as follows:
1. A catalyst for polymerization of olefins or styrenes, which is obtained by contacting (A) a transition metal compound, (B) an oxygen-containing compound and/or a compound capable of reacting with a transition metal compound to form an ionic complex, and optionally (C) an alkylating agent with each other, with further contacting them with (D) an adsorbing substance during or after the contacting treatment, then followed by removing the adsorbing substance.
2. The catalyst for polymerization of olefins or styrenes of above 1, wherein the adsorbing substance (D) is a porous substance.
3. The catalyst for polymerization of olefins or styrenes of above 1, wherein the adsorbing substance (D) is an inorganic oxide.
4. The catalyst for polymerization of olefins or styrenes of above 1, wherein the adsorbing substance (D) is any of clay, clay minerals and ion-exchanging layered compounds.
5. The catalyst for polymerization of olefins or styrenes of above 1, wherein the adsorbing substance (D) is any of phyllosilicic acid compounds.
6. The catalyst for polymerization of olefins or styrenes of above 1, wherein the adsorbing substance (D) is any of montmorillonites.
7. The catalyst for polymerization of olefins or styrenes of any one of above 1 to 6, wherein the adsorbing substance (D) has a specific surface area of at least 30 m
2
/g as measured according to the BET method.
8. The catalyst for polymerization of olefins or styrenes of any one of above 1 to 6, wherein the adsorbing substance (D) has a pore volume of at least 0.001 cm
3
/g as measured according to the BET method.
9. The catalyst for polymerization of olefins or styrenes of any one of above 1 to 8, wherein the transition metal compound (A) is any of compounds of a transition metal of Groups 4 to 6 or Groups 8 to 10 of the Periodic Table.
10. The catalyst for polymerization of olefins or styrenes of above 9, wherein the transition metal compound (A) is represented by any of the following general formulae (1) to (5):
where
Q
1
represents a bonding group that crosslinks the two conjugated five-membered cyclic ligands (C
5
H
5−a−b
R
1
b
) and (C
5
H
5−a−c
R
2
c
);
Q
2
represents a bonding group that crosslinks the conjugated five-membered cyclic ligand (C
5
H
5−a−d
R
3
d
) and the group Z
1
;
(C
5
H
5−e
R
4
e
) represents a conjugated five-membered cyclic ligand; R
1
, R
2
, R
3
and R
4
each represent a hydrocarbon group, a halogen atom, an alkoxy group, a silicon-containing hydrocarbon group, a phosphorus-containing hydrocarbon group, a nitrogen-containing hydrocarbon group, or a boron-containing hydrocarbon group; and a plurality of these groups, if any, may be the same or different, and may be bonded to each other to form a cyclic structure;
a represents 0, 1 or 2;
b, c and d each represent an integer of from 0 to 5 when a=0, or an integer of from 0 to 4 when a=1, or an integer of from 0 to 3 when a=2;
e represents an integer of from 0 to 5;
M
1
represents a transition metal of Groups 4 to 6 of the Periodic Table;
M
2
represents a transition metal of Groups 8 to 10 of the Periodic Table;
L
1
and L
2
each represent a coordination-bonding ligand;
X
1
, Y
1
, Z
1
, W
1
and U
1
each represent a covalent-bonding or ionic-bonding ligand; and
L
1
, L
2
, X
1
, Y
1
, W
1
and U
1
may be bonded to each other to form a cyclic structure.
11. The catalyst for polymerization of olefins or styrenes of above 10, wherein the transition metal compound (A) is of formula (3) and the group (C
5
H
5−e
R
4
e
) in formula (3) is any of the following general formulae (I) to (VII):
where
A represents an element of Group 13, 14, 15 or 16, and plural A's may be the same or different;
R represents a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group having from 1 to 30 carbon atoms, an aromatic hydrocarbon group having from 6 to 30 carbon atoms, an alkoxy group having from 1 to 30 carbon atoms, an aryloxy group having from 6 to 30 carbon atoms, a thioalkoxy group having from 1 to 30 carbon atoms, a thioaryloxy group having from 6 to 30 carbon atoms, an amino group, an amido group, a carboxyl group, or an alkylsilyl or alkylsilylalkyl group having from 3 to 30 carbon atoms, and R's may be the same or different, and optionally may be bonded to each other to form a cyclic structure;
a represents 0, 1 or 2; and
n and m each represent an integer of 1 or more.
12. A method for producing olefinic polymers, which comprises polymerizing olefins in the presence of the polymerization catalyst of any one of above 1 to 11.
13. A method for producing styrenic polymers, which comprises polymerizing styrenes in the presence of the polymerization catalyst of any one of above 1 to 11.
14. The method for producing styrenic polymers of above 13, wherein the styrenic polymers produced essentially have a syndiotactic structure.
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention are described in detail hereinunder.
1. Catalyst for Polymerization of Olefins or Styrenes
The catalyst for polymerization of olefins or styrenes of the invention is obtained by contacting (A) a transition metal compound, (B) an oxygen-containing compound and/or a compound capable of reacting with a transition metal compound to form an ionic complex, and optionally (C) an alkylating agent with each other, with further contacting them with (D) an adsorbing substance during or after the contac
Cheung William
Idemitsu Petrochemical Co. Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Wu David W.
LandOfFree
Polymerization catalysts for olefinic and styrenic monomer... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymerization catalysts for olefinic and styrenic monomer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymerization catalysts for olefinic and styrenic monomer... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2503893