| abstract |
Lubricant compositions containing (a) a mineral and/or synthetic base oil and (b) at least one compound of the formula I <IMAGE> (I) wherein a is 0 or 1, b is 1 to 6, R is H or alkoxycarbonyl, R1 and R2 are independently alkyl, cycloalkyl, aryl, aralkyl or are together substituted alkylene and X is hydroxyl, alkoxy, aryloxy, amino, substituted amino or the residue of a polyol, are described. |