| abstract |
A load-carrying agent and a lubricating composition containing such an agent. The agent is preferably comprised of a statistical mixture of a plurality of different coupled phosphorus-containing amide compounds having formula (I), wherein X1, X2 and X3, independently, is O or S; wherein R1 and R2, independently, is a hydrocarbyl, a hydrocarbyl-based oxy, the hydrocarbyl portion of which contains 6 to 22 carbon atoms, or a hydrocarbyl-based thio having from 4 to about 34 carbon atoms; wherein R3, R4, R5 and R6, independently, is hydrogen, or an alkyl having from 1 to about 22 carbon atoms, a cycloalkyl having from about 4 to about 22 carbon atoms, or an aromatic, an alkyl-substituted aromatic or an aromatic-substituted alkyl having from 6 to about 34 carbon atoms; wherein n is O or 1; wherein n' is 1, 2 or 3; wherein R7 is hydrogen or an alkyl having from 1 to 22 carbon atoms; and wherein when n' is 1, R8 is selected from the group consisting of H, -ROH, -ROR, -RSR and (II), and when n' is 2, R8 is selected from the group consisting of (III), when n' is 3, R8 is (IV), wherein R is independently hydrogen or an alkyl moiety, alkylene or alkylidene containing 1 to 12 carbon atoms and R' is hydrogen or an alkyl moiety, alkylene, alkylidene or carboxyl containing 1 to 60 carbon atoms. |