Chromium catalyst compositions and polymerization utilizing same

Details Chromium catalyst compositions and polymerization utilizing same Chromium catalyst compositions and polymerization utilizing same

1989-04-14

1991-01-01

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526106, C08F 424

Patent

active

049819275

ABSTRACT:
Improved mixed chromium catalysts useful in particle form polymerizations to produce readily processable high density polyolefin resins which also have high resistance to environmental stress cracking are provided. First and second chromium-containing catalyst components obtained using silica supports of different pore volumes and wherein one of the catalyst components also contains aluminum are employed for the preparation of the mixed catalysts. The polymerization process and products obtained using the above-described mixed catalysts are also described.

REFERENCES:
patent: 4496699 (1985-01-01), Rekers
patent: 4564660 (1986-01-01), Williams
patent: 4593079 (1986-06-01), Rekers
patent: 4640964 (1987-02-01), Johnson

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