Patent ID: 7867956
Filing Date: 2011-01-11
Classification: C10M,C10N

Abstract:
1. A urea-based lubricating grease composition having stable low torque properties over a wide temperature range comprising (a) as a thickener, from 5 to 15 weight %, based on the total weight of lubricating grease composition, of an alkyldiurea compound having an average molecular weight in the range of from 600 to 700, wherein in the range of from 25 to 60 mole % of the total alkyl groups is an unsaturated component, and the total amine value of the primary amine constituting the raw material is in the range of from 250 to 350, (b) a base oil having as its main component one or more synthetic hydrocarbon oil(s) having a pour point of −40° C. or below, wherein the one or more synthetic hydrocarbon oils are present in an amount of 80 weight % or more, based on the total weight of the base oil (b), and wherein the kinematic viscosity of the base oil is 6000 mm (c) as additives, an amount in the range of from 1.5 to 7 weight %, based on the total weight of the lubricating grease composition, of a mixture comprising an oil-soluble organic molybdenum complex, an oil-soluble organic zinc compound of dithiocarbamic acid, an oil-soluble organic zinc compound of dithiophosphoric acid and an inorganic sulphur compound selected from the group consisting of sodium sulphate, sodium sulphide, sodium thiosulphate and sodium sulphite.