Patent ID: 8153568

Claim:
Water-resistant grease comprising a base grease consisting of a non-water-based base oil and a thickener; and an additive added to said base grease, wherein said thickener comprises an alicyclic-aromatic urea compound synthesized by reaction among an aromatic diisocyanate, an alicyclic monoamine and an aromatic monoamine; and 1 to 40 parts by weight of said thickener is added to 100 parts by weight of said base grease, wherein said additive contains a water dispersant capable of uniformly dispersing water in said water-resistant grease, wherein said water dispersant consists of calcium sulfonate and sorbitan monooleate, wherein a basic value of said calcium sulfonate is 50 to 500, wherein a mixing amount of said water dispersant is so selected that a saturated amount of water, dispersible in said water-resistant grease with the diameter of a largest water particle not more than 50 μm, is from 30 to 60 wt %, wherein 0.5 to 2 parts by weight of said calcium sulfonate and 0.2 to 1 part by weight of said sorbitan monooleate arc added to 100 parts by weight of said base grease, wherein said additive contains a zinc dithiophosphate and an amine-based antioxidant.