Amide containing friction modifier for use in power transmission fluids

Amine salt composition derived from the reaction of at least one Component-1 amine with at least one Component-2 acid wherein:

• A. Component-1 is at least one reaction product derived from reacting:
• (i) amine having from about 2 to about 60 total carbon atoms, at least 2 and up to about 15 nitrogen atoms, with at least one of said nitrogen atoms being present in the form of a primary amine group, and at least one of the remaining nitrogen atoms being present as primary or secondary amine groups, and
• (ii) aliphatic mono acid having from about 10 to about 30 carbon atoms;
• said reaction being conducted in a manner and under conditions sufficient to (a) react at least one amine group of reactant A-i amine with the acid group of reactant A-ii acid to form an amide and (b) provide the resulting Component-1 reaction product with at least one reactive primary or secondary amine group;
• and
• B. Component-2 is the reaction product derived from reacting:
• (i) alcohol represented by the structural formula:
• ##STR73## wherein R.sub.6 and R.sub.7 each independently can represent hydrogen or C.sub.1 to C.sub.6 alkyl;
• (a), (b), (c), and (d) each independently represent a number which can vary from 1 to about 3;
• and Z represents a linking group selected from --S--, --S--S--, --O--, and >NR.sub.8 wherein R.sub.8 can represent hydrogen, C.sub.1 to about C.sub.4 alkyl, or C.sub.1 to about C.sub.4 monohydroxy substituted alkyl;
• and
• (ii) from about 1 to about 2 moles per mole of alcohol of an acid or anhydride represented by the respective structural formulas:
• ##STR74## wherein R'.sub.9 is hydrogen C.sub.1 to C.sub.6 aliphatic hydrocarbyl, R.sub.9 is an aliphatic hydrocarbyl group containing from about 12 to about 50 carbons;
• said reaction being conducted in a manner and under conditions sufficient to (a) react at least one hydroxy group of reactant B-i with at least one carboxyl group of reactant B-ii to form ester and (b) provide the resulting Component-2 reaction product with at least one reactive carboxyl group.