Patent ID: 8148307
Filing Date: 2012-04-03
Classification: C10M,C10N

Abstract:
1. A lubricant composition comprising: (a) an oil of lubricating viscosity, and (b) a tartrate derived from a material represented by formula I and an alcohol having about 8 to about 30 carbon atoms and combinations thereof; wherein each R is independently H, or a hydrocarbyl group, or wherein the R groups together form a ring; and wherein if R is H, said tartrate is optionally further functionalized by acylation or reaction with a boron compound; and (c) an additional friction modifier other than component (b); wherein said lubricant composition has a sulfated ash value of up to about 1.0, a phosphorus content of up to about 0.08 percent by weight and a sulfur content of up to about 0.4 percent by weight; and wherein the amount of said tartrate is about 0.1 to 5.0 percent by weight of said lubricating composition.