CPC C10M 129/68 (2013.01) [C10M 133/06 (2013.01); C10M 137/10 (2013.01); C10M 169/04 (2013.01); C10M 2207/28 (2013.01); C10M 2215/04 (2013.01); C10M 2223/045 (2013.01); C10N 2010/04 (2013.01); C10N 2030/06 (2013.01); C10N 2030/12 (2013.01); C10N 2030/45 (2020.05); C10N 2040/08 (2013.01); C10N 2040/20 (2013.01); C10N 2040/25 (2013.01)] | 4 Claims |
1. A lubricant additive, comprising:
a monoester carboxylic acid salt (A) represented by formula (1),
wherein R1 represents a divalent hydrocarbon group having 2 carbon atoms, R2 represents a linear or branched saturated hydrocarbon group or a linear or branched unsaturated hydrocarbon group having 4 to 18 carbon atoms, AO represents an oxyalkylene group of one type selected from oxyalkylene groups having 2 to 3 carbon atoms, or a mixed oxyalkylene group of two or more types selected from oxyalkylene groups having 2 to 3 carbon atoms, n is an average number of added moles of the oxyalkylene group represented by AO and is 1 to 3, and M represents organic ammonium selected from the group of secondary and tertiary ammonium cations in which a saturated or unsaturated hydrocarbon group having 1 to 24 carbon atoms is bonded to a nitrogen atom.
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