US 5,672,571 A · Grease composition for constant velocity joints

Abstract

A grease composition for constant velocity joints comprises (a) a base oil; (b) a lithium-containing thickener selected from the group consisting of lithium soap and lithium complex soap; (c) an organic molybdenum compound selected from the group consisting of molybdenum dithiophosphates and molybdenum dithiocarbamates; (d) a zinc dithiophosphate; (e) a sulfur-phosphorus extreme pressure agent free of any metal; and (f) a calcium salt selected from the group consisting of calcium salts of oxidized waxes, calcium salts of petroleum sulfonates and calcium salts of alkyl aromatic sulfonates. The grease composition for constant velocity joints exhibits a substantially improved effect of reducing friction coefficient and a substantially improved effect of reducing the axial force proportional to the third order component of rotation.

Claims12

Dependent claims

A grease composition for constant velocity joints, which comprises:

(a) 60 to 96% by weight of a base oil;
(b) 2 to 15% by weight of a lithium-containing thickener selected from the group consisting of lithium soap and lithium complex soap;
(c) 0.5 to 10% by weight of an organic molybdenum compound selected from the group consisting of molybdenum dithiophosphates and molybdenum dithiocarbamates;
(d) 0.5 to 5% by weight of a zinc dithiophosphate;
(e) 0.1 to 5% by weight of a sulfur-phosphorus extreme pressure agent free of any metal;
and
(f) 0.5 to 5% by weight of a calcium salt selected from the group consisting of calcium salts of oxidized waxes calcium salts of petroleum sulfonates and calcium salts of alkyl aromatic sulfonates.

4 more elements

Dependencies are inferred from the claim text.

Grease composition for constant velocity joints

Life of this patent

Grease composition for constant velocity joints

Life of this patent

Abstract

Claims12