Carbamate additives for low phosphorus or phosphorus free lubricating compositions

An additive for preparing a low-phosphorus containing or phosphorus-free lubricating oil, grease or automatic transmissions fluid derived from reactants comprising a major amount of an oil of lubricating viscosity and a minor amount of an additive derived from reactants comprising:

• (A) CS.sub.2, COS or a source material therefor;
• (B) an amine of the formula:
• R'R"NH, wherein R' and R" are the same or different and are alkyl groups of 1 to about 7 carbon atoms, aryl or aralkyl, or together form an alicyclic or heteroalicyclic radical in which the ring is completed through the nitrogen, and
• (C) a reactant of the formula:
• (CR.sub.10 R.sub.11 (CR').sub.x (R'.sub.3).sub.b)Z (II)
• wherein R.sub.10 and R.sub.11 are independently H, alkyl, aryl, Cl or Br;
• R' is H, alkyl, aryl or aralkyl;
• x is 0 or 1, b is 0 or 1 where x+b is 1;
• R'.sub.3 is H, alkyl or aryl, chloro or bromo and Z is CN, ##STR10## wherein R.sub.5 is H, alkyl or aralkyl, and wherein Y is H, OH, R.sub.6 or OR.sub.6 where R.sub.6 is alkyl, aryl or aralkyl, OR.sub.7 --OH where R.sub.7 is alkylene of 1 to about 7 carbon atoms and NR.sub.8 R.sub.9 where R.sub.8 and R.sub.9 are independently H, alkyl, cycloaliphatic, heteroalicyclic or together form an alicyclic or heteroalicyclic radical in which the ring is completed through the nitrogen;
• with the proviso that when x is O, Y is not OR.sub.6.