Patent ID: 6649574
Filing Date: 2003-11-18
Classification: C10M,C10N

Abstract:
A biodegradable lubricating oil composition comprising:(A) a major amount of one or more biodegradable synthetic alcohol ester basestocks formed from the reaction product of: (1) mono- and dipentaerythritol and (2) mixed acids comprising about 2 to 40 mole % linear monocarboxylic acids having from about 5 to about 12 carbon atoms, about 30 to about 70 wt % of a branched monocarboxylic acid having from about 15 to about 20 carbon atoms and from about 20 to about 30 mole % of a dicarboxylic acid having from about 4 to about 8 carbon atoms wherein the basestock has a viscosity at 100Â° C. in the range of about 20 to about 50 cSt at 100Â° C. and a pour point of less than about âˆ’20Â° C.; and (B) an effective amount of a polyoxyalkylene alcohol demulsifying agent, an ashless dithiocarbamate antiwear and extreme pressure agent, and a combination of alkylated organic acids and esters thereof and ashless succinimide rust inhibitors.