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

1993-04-14

1994-12-13

Sneed, Helen M. S.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526160, C08F 444

Patent

active

053730720

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 per cent 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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