LUBRICANT OIL COMPOSITION FOR ROTARY COMPRESSOR
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United States of America Patent
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Issued Date -
Nov 26, 2015
app pub date -
Dec 18, 2013
filing date -
Dec 19, 2012
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Abstract
A lubricating oil composition for a rotary compressor capable of imparting high extreme pressure property while maintaining high oxidation stability is provided by mixing, in (a) a base oil, (b) an antioxidant and (c) a dithiophosphate ester compound represented by the formula (I) in an amount of 0.05% by mass or more and less than 2.0% by mass based on the total composition.
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