Synthetic lubricant base stock of monopentaerythritol and trimethylolpropane esters
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United States of America Patent
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May 2, 1989
Grant Date -
N/A
app pub date -
Oct 16, 1986
filing date -
Oct 16, 1986
priority date (Note) -
Expired
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Abstract
An improved synthetic ester lubricant base stock formed by reacting at least one of trimethylolpropane and monopentaerythritol with a mixture of aliphatic monocarboxylic acids is provided. The mixture of acids including straight-chain acids having from 5 to 10 carbon atoms and an iso-acid having from 6 to 10 carbon atoms, preferably iso-nonanoic acid. The base stock is mixed with a conventional ester lubricant additive package to form a lubricant having a viscosity at 210.degree. F. of at leasts 5.0 centistokes and pour point of at least as low as -65.degree. F. The resulting lubricants have a decreased tendency to form deposits in gas turbine engines.
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