Aminomethyl derivatives of benzothiazolinethione as lubricant additives

Claim 1

A lubricant composition stabilized to reduce friction, wear, corrosion and oxidation, which comprises (a) one or more mineral oils or synthetic oils, and (b) 0.05 to 5% by weight, based on the oil, of at least one compound of formula I ##STR24## wherein R 1 is hydrogen, C 1 -C 12 alkyl, C 2 -C 4 alkoxy, C 2 -C 24 alkoxycarbonyl or nitro, R 2 is hydrogen, C 1 -C 12 alkyl, 2-furyl, phenyl or phenyl which is substituted by C 1 -C 4 alkyl, C 1 -C 4 alkoxy, C 2 -C 24 alkoxycarbonyl or nitro, and R 3 and R 4 are each independently of the other hydrogen, C 1 -C 20 alkyl, said alkyl interrupted by one or more members selected from O, S and N atoms or said alkyl containing oxo or thiono groups, or are C 3 -C 24 alkenyl, C 3 -C 12 alkoxyalkyl, C 5 -C 8 cycloalkyl, phenyl or phenyl which is substituted by C 1 -C 12 alkyl, C 1 -C 4 alkoxy, C 2 -C 24 alkoxycarbonyl or nitro; or are naphthyl, C 7 -C 9 phenylalkyl, 2-furylmethyl or 2-(tetrahydrofuryl)methyl; or R 3 and R 4 , together with nitrogen atom to which they are attached, form a 5- or 6-membered ring containing the N-atom, or said ring additionally containing further hetero atoms selected from O, N and S atoms or containing oxo or thiono groups, or said ring fused to a benzene nucleus.