Corrosion inhibitor for aviation turbine oils (PNE-628)
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United States of America Patent
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Jun 6, 1995
Grant Date -
N/A
app pub date -
Oct 12, 1993
filing date -
Oct 12, 1993
priority date (Note) -
Expired
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Abstract
A lubricating oil composition for jet engines which comprises: (a) an aviation turbine oil; (b) from about 0.025 to about 5.0 wt %, based on lubricating oil composition, of a dimercaptothiadiazole of the formula: ##STR1## where R and R.sup.1 are each independently hydrogen or hydrocarbyl radical having from 1 to 20 carbon atoms; and (c) from about 1.0 to about 30.0 wt %, based on lubricating oil composition, of an alphaolefin/maleic ester copolymer of the formula ##STR2## where R.sup.3 and R.sup.4 are each independently C.sub.1 to C.sub.18 alkyl, and n is an integer such that the average molecular weight of the copolymer is from 500 to 20,000.
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