Supported catalyst for 1-olefin(s) (co)polymerization

Details Supported catalyst for 1-olefin(s) (co)polymerization Supported catalyst for 1-olefin(s) (co)polymerization

1992-06-15

1993-08-24

Garvin, Patrick P.

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

Catalyst or precursor therefor

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

502104, 502107, 502103, 502117, 502120, 526129, C08F 4656

Patent

active

052388921

ABSTRACT:
This invention relates to a supported catalyst composition useful in the polymerization of olefins and to a method for its production. The invention particularly relates to the use of undehydrated silica gel containing from about 6 to about 20 percent by weight adsorbed water as the catalyst support material. The catalyst is formed by first reacting a trialkylaluminum compound with a metallocene, and subsequently reacting the resulting material with the undehydrated silica gel. The resulting supported metallocene-alumoxane catalyst has a level of activity comparable to that of conventionally made supported catalysts which are achieved at active metal loadings which are reduced from the loadings used in the previously known metallocene-alumoxane catalysts by at least 20%, and preferably 50%.

REFERENCES:
patent: 4808561 (1989-02-01), Welborn
patent: 4912075 (1990-03-01), Chang
patent: 4925821 (1990-05-01), Chang
patent: 4935397 (1990-06-01), Chang

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