Synthetic isoparaffinic premium heavy lubricant base stock
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United States of America Patent
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Jan 25, 2005
Grant Date -
Apr 8, 2004
app pub date -
Oct 8, 2002
filing date -
Oct 8, 2002
priority date (Note) -
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Abstract
A synthetic, isoparaffinic heavy hydrocarbon composition useful as a heavy lubricant base stock contains hydrocarbon molecules having consecutive numbers of carbon atoms, is a liquid at 100.degree. C., at which temperature its kinematic viscosity is above 8 cSt and has respective initial and end boiling points of at least 850 and 1000.degree. F. (454 and 538.degree. C.). The branching index BI and the branching proximity CH.sub.2 >4 of the isoparaffinic hydrocarbon molecules, are such that: BI-0.5(CH.sub.2 >4)<15; and (a) BI+0.85(CH.sub.2 >4)<45; (b) as measured over the hydrocarbon composition as a whole.
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