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US 11,149,228 B2Granted
Grease compositions and method for making the same
AssigneeAktiebolaget Skf
InventorsSathwik Chatra Kalsanka Ramakrishna, Dries Muller
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Abstract
A grease composition contains a mixture of a lubricating base oil, an ester-terminated polyamide and at least one polyolefin. The ester-terminated polyamide has the formula: R1-O—CO—R2-CO—[NH—R3-NH—CO—R2-CO]n-O—R1. R1 contains 4-22 carbon atoms, R2 contains 4-42 carbon atoms, R3 contains 2-9 carbon atoms and n is an integer in the range of 1-20. The grease composition can be used for lubricating a mechanical component having a metal surface and/or for protecting a mechanical component having a metal surface against corrosion, wear and/or fretting.
Claims20
A grease composition comprising a mixture of:
- a lubricating base oil, an ester-terminated polyamide, and at least one polyolefin thickener, wherein:
- the ester-terminated polyamide has the formula:
- R1-O-CO-R2-CO-[NH-R3-NH-CO-R2-CO]n-O-R1,
- wherein:
- each R1 is independently a linear or branched, saturated or unsaturated, substituted or unsubstituted hydrocarbon group containing 4-22 carbon atoms,
- each R2 is independently a linear or branched, saturated or unsaturated, substituted or unsubstituted hydrocarbon group containing 4-42 carbon atoms,
- each R3 is independently a linear or branched, saturated or unsaturated, substituted or unsubstituted hydrocarbon group containing 2-9 carbon atoms, n is an integer in the range of 1-20.
4 more elements
Dependencies are inferred from the claim text.