| abstract |
A load-carrying agent and a lubricating composition containing such an agent is disclosed. The agent is preferably comprised of a statistical mixture of a plurality of different coupled phosphorus-containing amide compounds having the formula ##STR1## wherein X 1 , X 2 and X 3 , independently, is O or S; wherein R 1 and R 2 , 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 R 3 , R 4 , R 5 and R 6 , 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 0 or 1; wherein n' is 1, 2 or 3; wherein R 7 is hydrogen or an alkyl having from 1 to 22 carbon atoms; and wherein when n' is 1, R 8 is selected from the group consisting of H, --ROH, --ROR, --RSR and ##STR2## and when n' is 2, R 8 is selected from the group consisting of ##STR3## when n' is 3, R 8 is ##STR4## 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. |