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US 12,606,771 B2Granted
Grease composition
AssigneeThe Lubrizol Corporation
InventorsRobert D. Dura, Jennifer E. Clark, Carlos Alberto Nazario, Amanda E. Freshwater
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Abstract
The instant disclosure provides a grease composition containing an ash-free phosphonate ester mixture, which comprises of an ash-free phosphonate ester mixture of a cyclic phosphonate ester species and an oligomeric phosphonate ester species. The grease composition further includes a metallic soap thickener. The grease compositions disclosed herein demonstrate improved anti-wear protection under very demanding conditions and load carry.
Claims20
A grease composition comprising:
- an ash-free phosphonate ester mixture comprised of 60 wt % or greater of a cyclic phosphonate of the following formula:
- wherein, R1, R2, R3, and R4 are independently selected from one of hydrogen, a hydrocarbyl groups of 1 to 1224 carbon atoms, and 15 to 30 wt % of an oligomeric phosphonate of the following formula:
- wherein,
- each R5 is independently a linear or branched hydrocarbyl group of 6 to 14 carbon atoms, and
- n is an integer from 1 to 8;
- and
- a metallic soap thickener.
4 more elements
Dependencies are inferred from the claim text.