| abstract |
The compounds according to the invention correspond to the formula I <IMAGE> (I) in which R is a hydrocarbon radical, A is one of the groups -O.CO-, -O- or <IMAGE> (in which m is 0-30) and Q, depending on the definition of A, is a hydrocarbon radical, a P-containing radical, an N-heterocyclic group or a radical containing N-heterocyclic groups. The compounds according to the invention also include those which are formed by an addition reaction of an O,O-dialkyl dithiophosphate with an epoxidised soybean oil. The compounds according to the invention are very useful as lubricant additives. |