High-temperature lubricants

Claim 1

A composition consisting essentially of (a) one or more lubricants or hydraulic oils based on mineral oil or synthetic oils and (b) 0.05 to 5% by weight, relative to the total weight of the lubricant composition or hydraulic oil composition, of a mixture of (1) at least one compound of the formula I or II ##STR16## in which Y is --O--, --S--, --NH-- or --NR 9 --, with R 9 being C 1 -C 12 -alkyl, Z is --CR 8 -- or --N-- and R 1 is hydrogen, C 1 -C 12 -alkyl, C 1 -C 4 -alkoxy, C 2 -C 24 -alkoxycarbonyl or nitro, R 2 is hydrogen or unsubstituted or OH-substituted C 1 -C 24 -alkyl, R 3 is hydrogen, C 1 -C 24 -alkyl or C 2 -C 24 -alkenyl, R 4 is C 1 -C 24 -alkyl or C 2 -C 24 -alkenyl, or R 3 and R 4 together are a --C(R 10 )═N--CH 2 -CH 2 - radical, with R 10 being hydrogen, C 1 -C 17 -alkyl or C 2 -C 17 -alkenyl, and R 5 is hydrogen, --SH or C 1 -C 22 -alkyl, R 6 is hydrogen, R 7 is hydrogen or R 6 and R 7 together are a direct bond, R 8 is hydrogen or C 1 -C 22 -alkyl or phenyl, or R 7 and R 8 together are carbonyl and a has the value 0 or 1 to 2, and (2) at least one compound of the formulae III or IV ##STR17## in which X, X 1 and X 2 independently of one another are oxygen or sulfur, R 11 and R 12 are identical or different and are each C 1 -C 12 -alkyl which may be interrupted by --O--, --S-- or --C(O)O --, unsubstituted or C 1 -C 12 -alkyl-substituted phenyl or naphthyl, unsubstituted or C 1 -C 4 -alkyl-substituted C 5 -C 12 -cycloalkyl or C 7 -C 13 -aralkyl, and n is the number 1, 2 or 3, n* is the number 1 or 2, m is the number 1 or 2, k is the number 1 or 2 and b is the number 0 or 1, and, in the case of n or n* being 2 or also n being 3, the radicals R 11 are identical or different or two radicals R 11 can, together with the two heteroatoms X 1 and the P atom to which they are linked, form a 5-membered or 6-membered ring, and in which M is a k-valent metal cation, a proton or a compound HN + R 13 R 14 R 15 , R 13 being hydrogen or unsubstituted or OH-substituted C 1 -C 30 -alkyl, R 14 being hydrogen or C 1 -C 30 -alkyl and R 15 being C 1 -C 30 -alkyl or C 18 -alkenyl, or R 14 and R 15 together forming a -C(R 16 )═N--CH 2 -CH 2 -- radical and R 16 being hydrogen, C 1 -C 17 -alkyl or C 2 -C 17 -alkenyl, with the proviso that, if m is 2 and k is 1, two different radicals M are possible.