Process for polymerizing olefins
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United States of America Patent
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Nov 4, 1980
Issued Date -
N/A
app pub date -
Oct 23, 1978
filing date -
Oct 23, 1978
priority date (Note) -
Expired
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Abstract
Trichlorofluoromethane is used as a promoter in the polymerization and copolymerization of ethylene with supported Ziegler-type vanadium compound/alkylaluminum compound catalysts in the presence of hydrogen. The use of the promoter leads to the formation of non-rubbery, semi-crystalline polymers in high yields, does not alter the basic molecular weight distribution of the polymers, permits independent control of molecular weight by hydrogen, and imparts no significant level of halogen to the product.
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