Boron alkyl as co-catalyst to improve polymerization yield and c

Details Boron alkyl as co-catalyst to improve polymerization yield and c Boron alkyl as co-catalyst to improve polymerization yield and c

1991-10-15

1994-07-19

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...

502114, 526132, C08F 4649

Patent

active

053309472

ABSTRACT:
This invention relates to a catalyst system using a boron alkyl in combination with an aluminum alkyl as a co-catalyst, a process for making the catalyst system and a process using the catalyst system for polymerization of olefins, especially .alpha.-olefins, such as propylene. While both boron alkyls and aluminum alkyls are known as co-catalysts separately, use of a boron alkyl with an aluminum alkyl as co-catalysts in olefin polymerization resulted in an unexpected increase in polymer yield. An increase in yield is accomplished without any increase in the amount of aluminum residue in the polymer product. The preferred boron alkyl is triethyl boron. The preferred aluminum alkyl is TEAl.

REFERENCES:
patent: 3135809 (1964-06-01), Bosmajian
patent: 3202645 (1965-08-01), Yancey
patent: 3591656 (1971-07-01), Kroll
patent: 4199476 (1980-04-01), Melquist et al.
patent: 4567154 (1986-01-01), Bacskai
patent: 4629714 (1986-12-01), Shelly

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