Lubrication greases including copolymers of tetrafluoroethyene oxide and hexafluoropropylene oxide
AssigneeThe Chemours Company Fc, LLC
InventorsALEXANDER BORISOVICH SHTAROV, PELIN HACARLIOGLU, JON LEE HOWELL
Life of this patent
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Abstract
A grease includes a perfluoropolyether oil copolymer and a thickener mixed with the copolymer. The copolymer includes about 20 mol % to about 80 mol % of —CF2CF2O— units, about 20 mol % to about 80 mol % of —CF(CF3)CF2O— units, and about 0 mol % to about 45 mol % of one or more additional perfluoroalkyleneoxy units. The copolymer has a viscosity index in the range of about 120 to about 220. The copolymer has an average TFEO run length of less than about 6. A process of forming a grease includes mixing a perfluoropolyether oil copolymer with a thickener to form the grease.
Claims20
A grease comprising:
- a perfluoropolyether oil copolymer comprising:
- about 20 mol % to about 80 mol % of —CF2CF2O— units;
- about 20 mol % to about 80 mol % of —CF(CF3)CF2O— units;
- and
- about 0 mol % to about 45 mol % of one or more additional perfluoroalkyleneoxy units;
- said copolymer having a viscosity index in the range of about 120 to about 220;
- and
- said copolymer having an average TFEO run length of less than about 6;
- and
- a thickener mixed with the copolymer.
A process of forming a grease, the process comprising:
- mixing a perfluoropolyether oil copolymer with a thickener to form the grease, wherein the perfluoropolyether oil copolymer comprises:
- about 20 mol % to about 80 mol % of —CF2CF2O— units;
- about 20 mol % to about 80 mol % of —CF(CF3)CF2O— units;
- and
- about 0 mol % to about 45 mol % of one or more additional perfluoroalkyleneoxy units;
- said copolymer having a viscosity index in the range of about 120 to about 220;
- and
- said copolymer having an average TFEO run length of less than about 6.
Dependencies are inferred from the claim text.