Method for producing olefin polymer blends utilizing a chromium-

Details Method for producing olefin polymer blends utilizing a chromium- Method for producing olefin polymer blends utilizing a chromium-

1990-05-29

1991-07-16

Garvin, Patrick P.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 97, 526352, 502113, 502154, C08F 464

Patent

active

050326511

ABSTRACT:
Olefinic polymer exhibiting high environmental stress crack resistance are produced by contacting the olefin charge stock in a single reactor with a compatible mix of two transition metal catalyst systems. One component of the catalyst system comprises chromium oxide supported on an aluminophosphate material. Hydrogen can be used as adjuvant for the hexavalent chromium component of the catalyst mixture. The second catalyst component consists essentially of a beta-stabilized tetrahydrocarbyl zirconium compound supported on inorganic support material. The catalysts can be premixed before use in the reactor, or can be added to the reactor separately. A suitable cocatalyst can be utilized.

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