A method for producing a high-activity solid PMAO composition is provided, involving: (a) heating an aromatic hydrocarbon solution of TMAL and PMAO containing units having formula (I), and precipitating a solid PMAO composition containing PMAO and TMAL; (b) adding an aromatic hydrocarbon solution of TMAL and PMAO containing units represented by formula (I) to a solution containing the solid PMAO composition; and (c) heating the resulting solution, thereby precipitating a solid PMAO composition. In steps (b) and (c), at least 70% of the PMAO and TMAL in terms of aluminum precipitates. The median diameter d2 of the solid PMAO composition produced in (c) is greater than the median diameter d1 of the solid PMAO composition produced in (a).
-[(Me)AlO].sub.n(I)
In formula (I), n represents an integer of 10-50. An olefin polymerization catalyst using the solid PMAO composition and a method for producing an olefin polymer using this catalyst are also described.

The present disclosure relates to a precursor for making an activator in a catalyst system for olefin polymerization and methods of producing the precursor, the catalyst system, and the polyolefin. In at least one embodiment, an alumoxane precursor includes (i) the reaction product of at least one non-hydrolytic oxygen-containing compound and at least one hydrocarbyl aluminum; and (ii) an aliphatic hydrocarbon fluid. The reaction product can be identified by first set of signals in an .sup.1HNMR spectrum in a region from about 4.5 ppm to about 5.1 ppm and a second set of signals in a region from about 5.1 ppm to about 6.5 ppm. The ratio of the first to the second set of signals is greater than or equal to about 2.8. The alumoxane precursor is easy to store and ship compared to MAO, which is an intermediate product in conventional methods for forming supported alumoxane.

An alkyl metalloxane compound and a method of producing the same are provided. The alkyl metalloxane compound includes one or more alkyl aluminoxane structural units, and one or more alkyl galloxane structural units per molecule. The method comprises reacting trialkyl gallium, trialkyl aluminum, and water.

Solid-phase supported materials are described for use in supporting metallocene catalytic compounds. The supported metallocene catalytic compositions are efficient olefin polymerisation catalysts, which show notably higher catalytic activity compared to catalytic compounds employing conventional support materials.

The present invention relates to a process for the preparation of a polyethylene wax, the process comprising the steps of providing a catalyst solution, wherein the catalyst solution comprises at least one activating compound, an alkylaluminoxane and a me-tallocene complex, wherein the molar ratio of the activating compound to aluminum comprised in the alkylaluminoxane is from 0.0005 to 0.20; and polymerizing ethylene, by contacting the ethylene and the catalyst solution.

Catalyst activators and methods for their preparation and their use in processes for polymerizing olefins are described. In particular, catalyst activators derived from aluminum alkyls and their use with metallocene type catalyst systems and/or conventional-type transition metal catalyst systems are described.

The present invention relates to a process to prepare alkylaluminoxanes by reaction of alkylaluminium with methacrylic acid or a conjugated unsaturated carbonyl-functional compound of the formula (I) wherein each R1 and R2 independently are an aliphatic hydrocarbon group, and R3 independently is the same hydrocarbon group as R1 and R2 or a hydrogen atom, and R4 isanaliphatic hydrocarbon group, a hydroxyl group or a hydrogen atom in the presence of an inert organic solvent. Additionally, it relates to the alkylaluminoxanes obtainable by the above process and their use. ##STR00001##

A method for producing a high-activity solid PMAO composition is provided, involving: (a) heating an aromatic hydrocarbon solution of TMAL and PMAO containing units having formula (I), and precipitating a solid PMAO composition containing PMAO and TMAL; (b) adding an aromatic hydrocarbon solution of TMAL and PMAO containing units represented by formula (I) to a solution containing the solid PMAO composition; and (c) heating the resulting solution, thereby precipitating a solid PMAO composition. In steps (b) and (c), at least 70% of the PMAO and TMAL in terms of aluminum precipitates. The median diameter d2 of the solid PMAO composition produced in (c) is greater than the median diameter d1 of the solid PMAO composition produced in (a).

-[(Me)AlO].sub.n(I)

In formula (I), n represents an integer of 10-50. An olefin polymerization catalyst using the solid PMAO composition and a method for producing an olefin polymer using this catalyst are also described.

The present disclosure provides methods for preparing a catalyst system comprising contacting in an aliphatic solvent at least one support material, at least one hydrocarbyl aluminum compound and at least one non-hydrolytic active oxygen-containing compound to form a supported alumoxane (catalyst precursor) and contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom. The supported alumoxane may be heated prior to contact with the catalyst compound.

Process to prepare alkylaminoxane by reacting, in the absence of solvent, 1 molar equivalent of alkylaluminium with 0.1 to 0.8 molar equivalent of a substituted allylic alcohol of the formula (I) wherein R1 and R2 are independently selected from aliphatic and aromatic hydrocarbon groups, and each R3, R4, and R5 is independently selected from aliphatic and aromatic hydrocarbon groups and a hydrogen atom.

##STR00001##