Synergistic antioxidant system for severely hydrocracked lubricating oils
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United States of America Patent
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Jun 23, 1992
Grant Date -
N/A
app pub date -
Jan 25, 1991
filing date -
Sep 14, 1990
priority date (Note) -
Expired
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Abstract
Lubricant compositions are disclosed in which a synergistic combination of low-volatility tri-substituted phosphite and selected substituted isocyanurate phenolic stabilizers provide surprisingly effective antioxidant qualities to lubricating oils selected from hydrotreated oils, poly-.alpha.-olefin oils, paraffinic white oils and mixtures thereof.
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