Organic aluminoxy compound and catalyst for producing polymer

Details Organic aluminoxy compound and catalyst for producing polymer Organic aluminoxy compound and catalyst for producing polymer

1997-08-05

1999-06-29

Nazario-Gonzalez, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Aluminum containing

556179, 556182, 502103, 502117, 526160, 526943, C07F 506, C07F 1700, B01J 3100

Patent

active

059170735

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to an organic aluminoxy compound and a catalyst for producing a polymer comprising the organic aluminoxy compound. More particularly, the present invention relates to an organic aluminoxy compound which provides a homogeneous catalyst having high and stable catalyst activity and a homogeneous catalyst for producing a polymer which comprises the above organic aluminoxy compound as a component and has high and stable catalyst activity.


BACKGROUND ART

As the process for polymerizing polymerizable unsaturated compounds, such as olefins and styrenes, to produce homopolymers and copolymers, processes using catalysts which comprise a transition metal compound, an ionic compound or an organic aluminoxy compound which can form an ionic complex compound by reaction with the transition metal compound, and optionally, a metal compound containing alkyl group have heretofore been known.
In the above homogeneous polymerization catalysts, the organic aluminoxy compound used as a component is a reaction product of an organoaluminum compound and water and forms a coordination polymerization catalyst by reaction with the transition metal compound. However, the known polymerization catalysts prepared by using an organic aluminoxy compound have a drawback in that polymers cannot be produced with stability and high activity because the properties of the catalyst show large dispersion.


DISCLOSURE OF THE INVENTION

Under the above circumstances, the present invention has an object of providing an organic aluminoxy compound which provides a homogeneous polymerization catalyst having high and stable catalyst activity. The present invention has another object of providing a catalyst for producing a polymer which comprises the above organic aluminoxy compound as a component and has high and stable activity.
As the result of the extensive studies undertaken by the present inventors to achieve the above objects, it was discovered that organic aluminoxy compounds having specific characteristics provides a homogeneous catalyst having high and stable catalyst activity and that a catalyst for producing a polymer which comprises a combination of the organic aluminoxy compound, a transition metal compound, and optionally, a metal compound containing alkyl group has stable and high activity. The present invention has been completed on the basis of the discoveries.
Accordingly, the present invention provides: magnetic resonance spectrum (hereinafter referred to as .sup.27 Al-NMR spectrum) having an A.sub.1 /A.sub.2 ratio of at most 0.1, wherein A.sub.1 is area of a region encompassed by a segment of a line which connects a local minimum point existing between a continuous curve "a" containing a peak appearing at around 150 ppm and a continuous curve "b" containing a peak appearing at around 60 ppm to the point where the above curve "b" comes into contact with the base line and also by the above curve "b" and A.sub.2 is area of a region encompassed by the above curves "a" and "b" and also by the base line; terms of aluminum atom, of a portion insoluble in a mixed solvent of toluene and hexane in a ratio by volume of 2:5 at 30.degree. C. or lower; compound and (B) organic aluminoxy compound (I) and/or (II); and compound, (B) organic aluminoxy compound (I) and/or (II), and (C) a metal compound containing alkyl group.


BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a schematic representation showing .sup.27 Al-NMR spectrum of an organic aluminoxy compound for describing the A.sub.1 /A.sub.2 ratio in .sup.27 Al-NMR spectrum of the organic aluminoxy compound of the present invention.


THE MOST PREFERRED EMBODIMENT TO CARRY OUT THE INVENTION

Organic aluminoxy compound (I) of the present invention shows .sup.27 Al-NMR spectrum having the following characteristic.
The apparatus for the measurement is not limited to the apparatus stated in the Description.
FIG. 1 is a schematic representation showing .sup.27 Al-NMR spectrum of an organic aluminoxy compound. The curve containing a peak appearing at arou

REFERENCES:
Chemical Abstracts, vol. 123, abstract No. 314830, 1995.

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