Sulphuration of unsaturated fatty ester(s)

摘要

Process for the sulphuration of a composition containing at least one ester of a 3-30C unsaturated fatty acid and a mono- or poly-alcohol, by the reaction of the composition with elementary sulphur in the presence of hydrazine or a hydrazine derivative. Also claimed is the sulphurised composition obtained and its use as a lubricant additive.