Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic -co- compound
Patent
1995-12-08
1997-08-19
Willis, Jr., Prince
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic -co- compound
508501, C10M12970, C10M12974
Patent
active
056588631
ABSTRACT:
A 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).sub.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 C.sub.5 to C.sub.12, and about 20 to 70 molar % of at least one branched acid having a carbon number in the range between about C.sub.5 to C.sub.10 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.degree. C.; a viscosity of less than 7500 cps at -25.degree. C.; and oxidative stability of up to 45 minutes as measured by HPDSC.
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Waal and Kenbeek, "Testing, Application, and Future Development of Environmentally Friendly, Ester Base Fluids", Journal of Synthetic Lubrication, vol. 10, No. 1, Apr. 1993, pp. 67-83.
Duncan Carolyn Boggus
Meade Leah Katherine
Exxon Chemical Patents Inc.
Jordan Richard D.
Toomer Cephia D.
Willis Jr. Prince
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