HALOGEN FREE IONIC LIQUIDS AS LUBRICANT OR LUBRICANT ADDITIVES AND A PROCESS FOR THE PREPARATION THEREOF

摘要

A lubricant or lubricant additive composed of halogen-, phosphorus- and sulphur-free ionic liquids containing fatty acid anions exhibit superior friction-reducing and anti-wear properties. Preferably, the lubricant composition comprises a base oil and an ionic liquid or mixed of two or more ionic liquids having concentration of 0.5 wt. % or more. These halogen-, phosphorus- and sulphur-free ionic liquids as lubricant or lubricant additive have minimal hazardous and corrosion effect to the environment and engineering surfaces, respectively. General chemical formula of fatty acid anion is represented as RCOO−; whereas R may be C4 to C30 straight chain alkyl, branched alkyl, cycloalkyl, alkyl substituted cycloalkyl, cycloalkyl substituted alkyl, alkenyl (single or more double bonds) includes with or without branched structure and may contain heteroatom.

主权项

1. A lubricant or lubricant additive(s) composition comprising an ionic liquid(s), wherein anions in the ionic liquid(s) are fatty acids of the general formula RCOO , wherein R is selected from C4 to C30 straight chain alkyl, branched alkyl, straight or branched alkenyl, cycloalkyl, alkyl substituted cycloalkyl, cycloalkyl substituted alkyl; alkyl or alkenyl group(s) containing heteroatom selected from —OH, —CN, —C—O —C—; and cations in the ionic liquids are selected from the group consisting of wherein R1 to R12 is similar or different from one another, selected from the group consisting of hydrogen, —OH, C1 to C18 alkyl group(s) including straight chain or branched structures, C2 to C12 alkenyl group(s) including straight chain or branched structures, wherein the alkyl or alkenyl group(s) optionally contain heteroatom, C7 to C12 arylalkyl group(s), C7 to C12 alkylaryl group(s).