A series of succinic acid alkyl half-esters were synthesized with higher than 97% yields by a one-step reaction of succinic anhydride with various fatty alcohols. The synthesized esters were soluble in 100N base oil at 1 wt% and the lubricating properties of the esters in ultra-low-sulfur diesel fuel were measured using a high-frequency reciprocating test rig and a four-ball wear machine. Wear scar diameter results showed that lubricity depended on the presence of a carboxylic acid group, and that enhancements to lubricity depended strongly on the chain lengths of the alkyl group.

Succinic acid alkyl half-ester derivatives with improved lubricity characteristics

243rd National Meeting (2012)

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