Method for preparing a supported metallocene-alumoxane catalyst

Details Method for preparing a supported metallocene-alumoxane catalyst Method for preparing a supported metallocene-alumoxane catalyst

Filed on

1988-11-29

Date issued

1990-06-26

Examiner

Garvin, Patrick P.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

Polymers from only ethylenic monomers or processes of...

Other Related Categories

502117, 502120, 5263482, 526351, 526352, 526129, C08F 464, C08F 468

Type

Patent

Status

active

Patent number

049373013

Description

ABSTRACT:
This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the gas phase polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 10 percent by weight adsorbed water as the catalyst support material. It has been found that such silica gel may be safely added to an aluminum trialkyl solution to form by direct reaction with the adsorbed water content of the silica gel catalyst support material the alumoxane component of the catalyst system. An alumoxane coated silica gel is formed to which a metallocene may be added and the resulting material dried to free flowing powder. The dry free flowing powder may then be used as a supported metallocene alumoxane catalyst complex for gas phase polymerization of olefins.

REFERENCES:
patent: 4808561 (1989-02-01), Welborn

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