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US 4,303,537 AGranted
Water based lubricant
AssigneeDow Corning Corporation
InventorsWerner Laepple, Gisela Wienert
Life of this patent
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Abstract
A stable aqueous dispersion of a solid lubricant combination of MoS.sub.2 and graphite and an acrylic resin is used to coat bearing members to provide an air drying long lasting lubricant coating. A typical formulation is 60 to 80% water, 15 to 30% MoS.sub.2 and graphite in the weight ratio of 1.5:1 to 2.5:1 and 5 to 10% polybutyl acrylate. The MoS.sub.2 and graphite preferably have a particle size of less than 5 .mu.m.
Claims5
A stable aqueous lubricant composition which contains
- (a) about 60 to 80 percent by weight water,
- (b) 15 to 30 percent by weight of a combination of molybdenum disulfide, having a particle size in the range of 1 to 5 inclusive and graphite in the weight ratio of 1.5:1 to 2.5:1,
- (c) 5 to 10 percent of a binder which is a hard, air drying polymer of an alkyl ester of methacrylic or acrylic acid in which the alkyl group contains 1 to 4 carbon atoms, (a), (b) and (c) combined giving 100 percent by weight,
- (d) about 0.1 to 2 percent by weight of a dispersing and/or wetting agent, and
- (e) about 0.1 to 1 percent by weight of a water soluble thickening agent, the weights of (d) and (e) both being based on the total weight of (a), (b) and (c).
2 more elements
Dependencies are inferred from the claim text.