Patent ID: 7381691
Filing Date: 2008-06-03
Classification: C10M,C10N

Abstract:
1. A method for lubricating a transmission, tractor, gearbox, or bearing, comprising supplying thereto a fluid composition comprising: (a) a friction modifier consisting of the reaction product of 1.6 to 2.5 moles of a carboxylic acid or a reactive equivalent thereof with 1 mole of an aminoalcohol selected from the group consisting of tris-hydroxymethylaminomethane, 2-amino-2-ethyl- 1,3-propanediol, 3-amino-l-propanol, 2-amino-l-propanol, 1 -amino-2-propanol, 2-amino-2-methyl-l-propanol, 4-amino-l-butanol, 5-amino-l-pentanol, 2-amino-l-pentanol, 2- amino-l-1,2-propanediol, 2-amino-1,3 -propanediol, 2-amino-2-methyl-1,3-propanediol, N-(2-hydroxyethylethylenediamine, N,N-bis(2-hydroxyethyl)ethylenediamine, 1,3-diamino-2 -hydroxypropane, N,N′-bis-(2-hydroxylethyl)ethylenediamine, and 1-aminopropyl-3-diisopropanol amine, wherein the friction modifier contains at least two branched chain alkyl groups each containing at least about 6 carbon atoms and (b) a dispersant other than a species of (a).