Cyclic phosphonate esters for lubricant applications

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United States of America Patent

PATENT NO 12060537
APP PUB NO 20230257675A1
SERIAL NO

18011650

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Lubricant compositions comprising (a) an oil of lubricating viscosity and (b) a phosphonate ester other than a zinc salt. The phosphonate ester may be the reaction product of (i) phosphonic acid or a monomeric ester thereof with (ii) a propanediol having hydroxy groups in both the 1 and 3 positions and one or more of the carbon atoms of the propyl units are substituted with one or more alkyl groups such that the total number of carbon atoms in the propanediol ranges from 4 to 12. The molar ratio of (i) to (ii) may be 0.9:1.1 to 1.1 to 0.9.

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Patent Owner(s)

Patent OwnerAddress
THE LUBRIZOL CORPORATION29400 LAKELAND BLVD WICKLIFFE OH 44092-2298

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Freshwater, Amanda Avon, US 1 0
Hanthorn, Jason J Eastlake, US 11 10
Rasik, Christopher M Cleveland, US 7 0

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