Automatic transmission fluid comprising esters derived from a particular monocarboxylic acid composition
Drilling fluids containing an additive composition
Process for continuously manufacturing lubricating grease
Synthetic ester lubricating oil composition containing particular t-butylphenyl substituted phosphates and stabilized hydrolytically with particular long chain alkyl amines
Synthetic lubricant base stock of monopentaerythritol and trimethylolpropane esters
High-viscosity, neutral polyol esters
High temperature compressor oil
Lubricating oil composition for 2 cycle or rotary engine
ApplicationNo. 572131 filed on 12/08/1995
US Classes:508/485, Esterified alcohol is polyhydroxy alcohol (e.g., pentaerythritol tetraalkanoate, etc.)508/501Chalcogen attached indirectly to the -C(=O)O-group by nonionic bonding (e.g., pentaerythritol monooleate, etc.)
ExaminersPrimary: Willis, Prince Jr.
Assistant: Toomer, Cephia D.
Attorney, Agent or Firm
Foreign Patent References
International ClassesC10M 129/70
AbstractA biodegradable lubricant which is prepared from: about 60-99% by weight of at least one biodegradable synthetic ester base stock which comprises the reaction product of: a branched or linear alcohol having the general formula R(OH)n, wherein R is an aliphatic or cyclo-aliphatic group having from about 2 to 20 carbon atoms and n is at least 2; and mixed acids comprising about 30 to 80 molar % of a linear acid having a carbon number in the range between about C5 to C12, and about 20 to 70 molar % of at least one branched acid having a carbon number in the range between about C5 to C10 and wherein no more than 10% of the branched acids used to form the biodegradable synthetic ester base stock contains a quaternary carbon; wherein the ester base stock has an oxygen to carbon ratio of between about 0.15:1 to 0.3:1 and exhibits the following properties: at least 60% biodegradation in 28 days as measured by the Modified Sturm test; a pour point of less than -25° C.; a viscosity of less than 7500 cps at -25° C.; and oxidative stability of up to 45 minutes as measured by HPDSC.