Boric-acid complexes

摘要: Compounds of formula I ##STR1## wherein R and R1 are identical or different a radical the ##STR2## where R2, R3 R4 each independently C1 -C18 alkyl together contain not more than 22 carbon atoms, also hydrogen, C5 -C6 cycloalkyl, unsubstituted -C4 alkyl-substituted phenyl, naphthyl, C7 -C14 aralyl, furfuryl thienyl, Y is --S--, --O--, --NH--, --N(C1 -C12 alkyl)--, --CH2 --, --CH(C1 alkyl)-- --C(C1 alkyl)2 -- X.sup.⊕ 1 equivalent metallic cation selected from group consisting Li.sup.⊕, Na.sup.⊕, K.sup.⊕, Mg2⊕, Ca2⊕, Ba2⊕, Zn2⊕, Mn2⊕, Ni2⊕, Fe3⊕, Fe2⊕, Co2⊕, Cu2⊕, Al3⊕, Cr3⊕, VO.sup. 3⊕, ZrO2⊕, MoO2 2⊕ TiO2⊕, suitable as additives for lubricants hydraulic oils bring about an improvement in extreme-pressure properties anti-wear properties.