FIELD: acids.
SUBSTANCE: invention relates to new 4-{2-[5-hydroxy-3-oxo-5-(perfluoroalkyl)pent-4-en-2-ylidene]hydrazinyl}benzoic acids of general formula I, which improve the antifriction properties of greases.
EFFECT: efficiently reduced coefficient of friction.
1 cl, 1 dwg, 1 tbl, 5 ex
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