Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Heterocyclic ring compound; a heterocyclic ring is one...
Patent
1996-03-12
1996-12-17
Howard, Jacqueline V.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Heterocyclic ring compound; a heterocyclic ring is one...
508296, 508297, 508525, C10M13344, C10M11702
Patent
active
055853358
ABSTRACT:
A grease composition comprises an effective amount of a lubricating oil containing an imide or pyrrolidone thickening agent or an imide or pyrrolidone thickening agent comprising a metal salt of a carboxylic acid in combination with a bimetal phthalate complexing agent, such as dilithium terephthalate. The presence of the complexing agent results in a grease having properties superior to that of a similar grease without the complexing agent. Preferred complexing agents are dimetal terephthalates in which the metal is an alkali or alkaline earth metal and is the same metal as is present in the thickener. An example is a combination of a calcium or lithium salt of the reaction product of trimellitic anhydride with a hydrogenated rapeseed amine and a dilithium terephthalate complexing agent.
REFERENCES:
patent: 3224968 (1965-12-01), Henkamp
patent: 4253979 (1981-03-01), Alexander et al.
patent: 4822503 (1989-04-01), Norton et al.
patent: 4897210 (1990-01-01), Newsoroff
Andrew David L.
Slack David A.
Exxon Research and Engineering Company
Howard Jacqueline V.
Ott Roy J.
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