LUBRICATING OIL COMPOSITION COMPRISING AN ADDITIVE COMBINATION OF A CARBOXYLIC ACID AND AN AMINE AS ANT-RUST AGENT

摘要

Lubricating oil composition comprising a minor amount of an additive combination comprising (i) a carboxylic acid-based or carboxylic acid ester based anti-rust agent; (ii) at least one type of amine selected from among the group comprising (A) the alkyl amines which can be represented by general formula (1) (R<1>)nNH3-n, wherein R<1> represents a saturated or unsaturated alkyl group which has from 12 to 30 carbon atoms, and n is an integer of value 1 or 2; and (B) the N-alkylpolyalkylenediamines which can be represented by general formula (2) R<2>NH(CH2)mNH2, wherein R<2> represents a saturated or unsaturated alkyl group which has from 12 to 30 carbon atoms, and m is an integer of value from 2 to 5; and a major amount of lubricating oil base oil.