Solid lubricant composition
AssigneeDow Corning Corporation
InventorRudiger Holinski
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Abstract
A solid lubricant composition comprises (I) 30 to 70 parts by weight of graphite, (II) 70 to 30 parts by weight of a mixture of at least two components selected from alkali molybdate, alkali or alkaline earth sulphate and alkali phosphate, the ratio of the two individual ingredients being in the range of from 0.05/1 to 20/1. Compositions give improved load-bearing capacity and allows settling of friction coefficient.
Claims7
A solid lubricant composition comprising (I) 30 to 70 parts by weight of graphite, (II) 70 to 30 parts by weight of a mixture of at least two components selected from the group consisting of (a) sodium molybdate, (b) sodium sulphate, (c) barium sulphate and (d) sodium phosphate, the ratio of the two components being in the range of from 0.5/1 to 20/1.
A process for the preparation of a solid lubricant composition comprising (I) 30 to 70 parts by weight of graphite, (II) 70 to 30 parts by weight of a mixture of at least two components selected from the group consisting of (a) alkali molybdates, (b) a member of the group consisting of alkali sulphates and alkaline earth sulphates and (c) alkali phosphates, the ratio of the two components being in the range of from 0.05/1 to 20/1, wherein the process comprises (i) dissolving the components of mixture (II) in water (ii) adding graphite to the solution thus forming a slurry, (iii) drying the slurry and, (iv) pulverizing the dried substance to a desired particle size.
Dependencies are inferred from the claim text.