Synergistic pour point depressant combinations and hydrocarbon lube mixtures
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United States of America Patent
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Jun 24, 1997
Grant Date -
N/A
app pub date -
Sep 28, 1995
filing date -
Sep 28, 1995
priority date (Note) -
Expired
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Abstract
A synergistic mixture of pour point depressants is disclosed along with hydrocarbon lubricants containing same. The pour point depressant mixture is a mixture of a first PPD comprising a near linear copolymer of a mixture of ethylene and C.sub.3 -C.sub.28 1-alkenes, or only 1-alkenes, wherein a large proportion of the pendant alkyl groups of the recurring 1-alkene monomer units contain between 14 and 22 carbon atoms; and an additional conventional PPD, preferably polymethylmethacrylate. The copolymer is produced by polymerization of mixed 1-alkenes with reduced chromium oxide catalyst on silica support.
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