Lubricant composition

A compound of the general formula II ##STR76## in which x=1 or 2,

• R.sup.2 is as defined for --OR.sup.6 or --SR.sup.7 and,
• if x=1,
• R is as defined for R.sup.1 or R.sup.3 --O--,
• and R.sup.1 is alkyl having 1 to 25 C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 5 to 12 ring C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group, alkenyl having 2 to 18 C atoms, phenyl, naphthyl, C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl, or
• R.sup.3 is alkyl having 9 to 25 C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 5 to 12 ring C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group, alkenyl having 5 to 18 C atoms, C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl, or
• R.sup.1 and R.sup.3 are alkyl having 1 to 25 C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 5 to 12 ring C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group, alkenyl having 2 to 18 C atoms, phenyl, naphthyl, C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl, each of which are monosubstituted or polysubstituted by groups from the series comprising halogen, cyano, nitro, --OR.sup.a or --COOR.sup.b, or
• R.sup.1 and R.sup.3 are alkyl having 2 to 25 C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 3 to 10 ring C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.3 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group, alkenyl having 3 to 18 C atoms, C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl, each of which are interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR77## C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl being interrupted only in the alkyl radicals, or
• R.sup.1 and R.sup.3 are alkyl having 2 to 25 C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 3 to 10 C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.3 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group, alkenyl having 3 to 18 C atoms, C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl, each of which are monosubstituted or polysubstituted by groups from the series comprising halogen, cyano, nitro, --OR.sup.a or --COOR.sup.b and interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR78## C.sub.7 -C.sub.18 aralkyl or C.sub.7 -C.sub.18 alkaryl being interrupted only in the alkyl radicals,
• R.sup.a being as defined for R.sup.3 with the exception of --OR.sup.a and
• R.sup.b being alkyl having 1 to 18 C atoms or alkyl having 2 to 20 C atoms and interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR79## or an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 5 to 12 ring C atoms or phenyl, naphthyl, C.sub.7 -C.sub.18 alkaryl or C.sub.7 -C.sub.18 aralkyl, and R.sup.6 and R.sup.7 are alkyl having 11 to 18 C atoms or alkyl having 2 to 20 C atoms and interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR80## or an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted cycloalkyl group having 5 to 12 ring C atoms, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group, an unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.3 -C.sub.12 cycloalkyl-C.sub.1 -C.sub.4 alkyl group interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR81## C.sub.7 -C.sub.18 alkaryl or C.sub.7 -C.sub.18 aralkyl, or, if x=2,
• R is as defined for R.sup.8 and
• R.sup.8 is alkylene having 1 to 18 C atoms alkylene having 2 to 18 C atoms and interrupted by at least one --O-- group, alkylidene having 2 to 20 C atoms or alkylidene having 3 to 20 C atoms and interrupted by at least one --O-- group.