Solid catalyst component for olefin polymerization, catalyst...

Details Solid catalyst component for olefin polymerization, catalyst... Solid catalyst component for olefin polymerization, catalyst...

1998-11-30

2001-03-20

Wu, David W. (Department: 1713)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

C502S127000, C526S127000, C526S128000, C526S216000

Reexamination Certificate

active

06204215

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a solid catalyst component for olefin polymerization and a catalyst comprising the component for olefin polymerization, which are used in homo- or co-polymerization of &agr;-olefins to give homopolymers or copolymers, and to a method for producing olefin polymers.
BACKGROUND OF THE INVENTION
A variety of solid catalyst components comprising, as the indispensable ingredients, magnesium, titanium, halogen and electron donor have heretofore been proposed for catalysts. It is well known that the catalysts comprising the component of that type have high catalytic activity in olefin polymerization and that &agr;-olefin polymers produced in the presence of the catalyst have high stereospecificity. In particular, it is known that the solid catalyst components comprising, as the electron donor, an aromatic ester such as typically a phthalate exhibit excellent capabilities. However, using aromatic compounds is often disliked as being not safe and not good for the health.
Regarding non-aromatic electron donors, a method of using an electron donor of a malonate derivative has been reported. For example, in Japanese Patent Publication (JP-B) Hei-4-80044, proposed were compounds of a general formula (II):
wherein either one or both of R
3
and R
5
are linear or branched hydrocarbon residues having 4 carbon atoms, or aromatic hydrocarbon residues. However, the stereospecificity of the polymers to be produced in the method in which the proposed compound is used is not good. In Japanese Patent Application Laid-Open (JP-A) Hei-6-122716, proposed are compounds of formula (II) in which R
3
and R
5
are bonded to each other to form a ring. In JP-A Hei-279517, proposed were compounds of formula (II) in which R
4
and R
5
are both hydrogens, those in which either one of R
4
and R
5
is a linear or branched hydrocarbon residue having 1 or more carbon atoms or an aromatic hydrocarbon residue, and the other is a hydrogen atom, and those in which R
3
and R
5
are both linear hydrocarbon residues having 2 or more carbon atoms. In the method in which the proposed compound is used, however, the yield of the polymers produced is extremely low. In JP-A Hei-8-157521, proposed were compounds of formula (II) in which R
3
and R
5
are both branched or cyclic hydrocarbon residues having 3 or more carbon atoms. In the method, however, the proposed malonates having branched or cyclic hydrocarbon residues are difficult to produce, and the yield of the polymers produced is low. Therefore, the method is not practicable. Other methods of using electron donors of other non-aromatic diesters were reported in JP-A Hei-3-124705 and JP-A Hei-3-168208. However, these methods are not always satisfactory for obtaining stereospecific polymers at high yields.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a solid catalyst component for olefin polymerization and a catalyst comprising the component for olefin polymerization, in which the electron donor is free from the problem of lacking in safety and sanitation, and is inexpensive and easy to produce, and which exhibit high activity in producing olefin polymers with high stereospecificity, and also to provide a method for producing olefin polymers.
We, the present inventors have assiduously studied in order to attain the object noted above, and, as a result, have found that the problems mentioned above can be solved by the use of a solid catalyst component for olefin polymerization which comprises titanium, magnesium and an electron donor of a compound of the following general formula (I). On the basis of this finding, we have completed the invention.
Specifically, the invention provides a solid catalyst component for olefin polymerization, a catalyst for olefin polymerization, and a method for producing olefin polymers, which are as follows:
(1) A solid catalyst component for olefin polymerization, which comprises titanium, magnesium and a compound of a general formula (I):
wherein R
1
and R
2
each represent a linear or branched hydrocarbon residue having from 1 to 20 carbon atoms, and these may be the same or different ones; R
3
represents an alicyclic hydrocarbon residue having from 3 to 20 carbon atoms; and n represents an integer of from 1 to 10.
(2) A catalyst for olefin polymerization, which comprises (A) a solid catalyst component for olefin polymerization of (1), and (B) an organic aluminium compound.
(3) A catalyst for olefin polymerization, which comprises (A) a solid catalyst component for olefin polymerization of (1), (B) an organic aluminium compound, and (C) a third component of an electron donor compound.
(4) The catalyst for olefin polymerization of (3), wherein the third component of an electron donor compound (C) is an organic silicon compound.
(5) A method for producing olefin polymers, which comprises polymerizing olefins in the presence of a catalyst for olefin polymerization of any one of (2) to (4).


REFERENCES:
patent: 0 125 911 (1984-05-01), None
patent: WO 98/56833 (1998-12-01), None

Affiliated with

Also associated with

Rating

Solid catalyst component for 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 Solid catalyst component for olefin polymerization, catalyst..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid catalyst component for olefin polymerization, catalyst... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2510774