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US 6,268,321 B1Granted
Grease prepared from chemically inert oil and thickening agent, and process for making same
AssigneeHalocarbon Products Corporation
InventorLee G. Sprague
Life of this patent
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Abstract
A grease made by combining polychlorotrifluoroethylene oil with a thickening agent comprising polychlorotrifluoroethylene (PCTFE) polymer. The thickening agent is made by polymerizing chlorotrifluoroethylene [R-1113] in the presence of a telogen, which is 2,2-dichloro-1,1,1-trifluoroethane[R-123] or a homolog thereof, namely CF3—CF2—CHCl2, CF3—CF2—CF2—CHCl2, and CF3—CF2—CF2—CF2—CHCl2.
Claims6
A process for preparing a grease comprising:
- a) polymerizing chlorotrifluoroethylene [R-1113] monomer in the presence of a telogen to yield polychlorotrifluoroethylene polymer, and thereafter
- b) combining a thickening agent comprising the product of a) with polychlorotrifluoroethylene oil in amounts and under conditions resulting in the production of a grease,
- wherein the telogen in a) is a compound of the formula CF3—(CF2)n—CHCl2, wherein n is 0, 1, 2 or 3.
Dependencies are inferred from the claim text.