Environmentally friendly lubricants
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United States of America Patent
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N/A
Issued Date -
Oct 2, 2003
app pub date -
Sep 24, 2002
filing date -
Sep 25, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A biodegradable lubricant that is at least 60% biodegradable and has a gelation index of about 12 or less can be formulated using a transesterified triglyceride base oil together with a synthetic ester. A combination of an ester viscosity index improver and an olefin copolymer viscosity index improver also can be added. Further, the composition can be blended with mineral oils to lower the polarity in order to employ standard dispersant/inhibitor packages. Further, by mixing high and low viscosities of mineral oil in the formulation, it is possible to prepare a full range of SAE grade engine oils for gasoline-fueled and diesel-fueled engines.
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