abstract |
Compounds of the formula wherein the symbols R 1 to R 9 have the meaning given in claim 1, are suitable as extreme pressure and antiwear additives for lubricants. The compounds contain as radicals R 5 or R 7 a group of the formula wherein R 10 and R 11 have the meaning given in claim 1. The compounds according to the invention are also distinguished as good antioxidants and anti-corrosion agents. |