Hydrocarbon base oil for lubricants with very high viscosity index
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United States of America Patent
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Jul 29, 2003
Grant Date -
N/A
app pub date -
Jun 19, 2002
filing date -
Sep 8, 1999
priority date (Note) -
Expired
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Abstract
The invention concerns a novel hydrocarbon base oil for lubricants, having a viscosity index not less than 130, comprising mainly long isoparaffinic hydrocarbon chains, branched over several carbon atoms. The invention is characterized in that said chains comprise a number of carbon atoms greater than 25 and have a ratio of the number of substituents consisting of at least two carbon atoms over the number of methyl-type substituents, not less than 0.9.
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