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

1999-10-13

2001-08-21

Nazario-Gonzalez, Porfirio (Department: 1621)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S153000, C526S160000, C526S347200, C526S351000, C526S352000, C526S943000, C556S002000, C556S011000, C556S021000, C556S046000, C556S053000, C502S103000, C502S117000

Reexamination Certificate

active

06277934

ABSTRACT:

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:
(1) An organic aluminoxy compound (I) which shows
27
Al nuclear magnetic resonance spectrum (hereinafter referred to as
27
Al-NMR spectrum) having an A
1
/A
2
ratio of at most 0.1, wherein A
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
2
is area of a region encompassed by the above curves “a” and “b” and also by the base line;
(2) An organic aluminoxy compound (II) containing at least 5%, expressed in 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° C. or lower;
(3) A catalyst for producing a polymer comprising (A) a transition metal compound and (B) organic aluminoxy compound (I) and/or (II); and
(4) A catalyst for producing a polymer comprising (A) a transition metal compound, (B) organic aluminoxy compound (I) and/or (II), and (C) a metal compound containing alkyl group.


REFERENCES:
patent: 6034191 (2000-04-01), Kondoh et al.
patent: 0 208 561 (1987-01-01), None
patent: 0 393 358 (1990-10-01), None
patent: 0 403 830 (1990-12-01), None

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