Lubricant mixtures and grease compositions based thereon
AssigneeShell Oil Company
InventorJohn W. Harris
Life of this patent
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Abstract
This invention provides lubricant mixtures for use as base fluid in open-gear grease comprising 10% to 90% w of a liquid polybutene having a viscosity at 38.degree. C. in the range of 1,000 to 20,000 mm.sup.2 /s and a viscosity at 100.degree. C. in the range of 40 to 500 mm.sup.2 /s, and 10% to 90% of a liquid polyalphaolefin having a viscosity at 38.degree. C. in the range of 10 to 75 mm.sup.2 /s and a viscosity at 100.degree. C. in the range of 2 to 15 mm.sup.2 /s, and open-gear grease compositions containing a major proportion of such lubricant mixtures.
Claims7
A lubricant mixture for use as a base fluid in open-gear grease consisting essentially of from about 55% w to about 65% w of a liquid polybutene having a viscosity at 38.degree. C. in the range of 1,000 mm.sup.2 /s to 20,000 mm.sup.2 /s and a viscosity at 100.degree. C. in the range of 40 mm.sup.2 /s to 500 mm.sup.2 /s, and from about 30% w to about 50% w of a liquid polyalphaolefin having a viscosity at 38.degree. C. in the range of 10 mm.sup.2 /s to 75 mm.sup.2 /s and a viscosity at 100.degree. C. in the range of 2 mm.sup.2 /s to 15 mm.sup.2 /s.
A lubricant mixture for use as a base fluid in open-gear grease consisting essentially of from about 55% w to about 65% w of a liquid polybutene having a viscosity at 38.degree. C. in the range of 6,000 mm.sup.2 /s to 12,000 mm.sup.2 /s and a viscosity at 100.degree. C. in the range of 150 mm.sup.2 /s to 300 mm.sup.2 /s and 30% w to 50% w of a liquid polyalphaolefin having a viscosity at 38.degree. C. in the range of 20 mm.sup.2 /s to 45 mm.sup.2 /s and a viscosity at 100.degree. C. in the range of 4 mm.sup.2 /s to 9 mm.sup.2 /s.
Dependencies are inferred from the claim text.