Patent ID: 6531429
Filing Date: 2003-03-11
Classification: C10M,C10N

Abstract:
A lubricant composition comprisinga) a base oil of lubricating viscosity used for greases, for metal-working fluids, for gear fluids or for hydraulic fluids; b) at least one thiophosphoric acid ester of formula I â€ƒwherein R1, R2 and R3 are substitutents selected from the group consisting of C3-C20alkyl, C5-C12cycloalkyl, C7-C12bicycloalkyl, phenyl, C7-C18alkylphenyl, C7-C18alkoxyphenyl, naphthyl and C7-C9phenylalkyl c) at least one compound of formula II â€ƒwherein X is oxygen or sulfur, and R1 and R2 are unsubstituted C3-C10hydrocarbon radicals and R3 is C2-C4-alkyl which is substituted by a group of the sub-formula â€ƒwherein Rx and Ry are hydrogen or C1-C4alkyl; and d) at least one oil additive selected from the group consisting of polyol partial esters, primary C1-C20alkylamines, secondary C1-C20alkylamines, alkanolamines, etheramines, polyoxyalkylene diamines, polyoxyalkylene polyamines, primary amines having C5-C6cycloalkyl radicals, secondary amines having C5-C6cycloalkyl radicals and epoxides with the proviso that the composition is metal free.