| abstract |
The essence of the invention: as additives to oily compositions can be used compounds of the formula where B is an aromatic system, A is a hydrocarbyl group, each of R and R are identical or different and independently are aliphatic hydrocarbyl group containing 10-40 carbon atoms, provided that that one of R and R is hydrogen; z exactly at least 1 and where the aromatic system includes at least one substituent group, which is an activating group for the ring system, or a derivative of the activating group. |