Patent ID: 7517837

Claim:
A lubricant composition, comprising: (a) at least about 55 weight percent biodegradable base oil selected from the group consisting of: i) the reaction product of at least one neopentyl polyol and valeric acid ii) the reaction product of at least one neopentyl polyol and a mixture of heptanoic acid and caprylic-capric acid; and iii) the reaction product of at least one neopentyl polyol, valeric acid and a mixture of heptanoic acid and caprylic-capric acid; (b) between about 7.5 to 20 weight percent of an overbased calcium sulfonate thickener system; and (c) between about 5 to 10 weight percent of a phospholipid anti-wear agent; wherein the lubricant composition has a specific gravity of at least 1.0 at 60° F. (15.6° C.).