Biodegradable lubricants
AssigneeAnderol, Inc.
InventorsJohn M. Kurosky, Zulfiqar Ahmed Tahir
Life of this patent
Estimating the term…
Abstract
Lubricant compositions based on a biodegradable base oil, such as a polyol ester or polyalkylene glycol, a calcium sulfonate based thickener and a naturally occurring phospholipid as an anti-wear additive, such as lecithin for environmentally sensitive applications and when having a specific gravity greater than 1.0 at 60° F. (15.6° C.) for marine applications are provided. The thickener may include a linear alkybenzene sulfonic acid, acetic acid and 12 hydroxystearic acid and a calcium carbonate solid film lubricant. The lubricant submerges when dispensed on water avoiding formations of a surface sheen and biodegrades when submerged resulting in a water ecology friendly lubricant.
Claims18
A lubricant composition, comprising:
- (a) between about 55 to 90 weight percent biodegradable base oil;
- (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 phospholipid anti-wear agent.
A lubricant composition, comprising:
- (a) between about 55 to 90 weight percent biodegradable base oil;
- (b) between about 10 to 35 weight percent overbased calcium sulfonate thickener;
- and
- (c) between about 3 to 5 weight percent 12 hydroxystearic acid;
- (d) between about 1.5 to 3.0 weight percent calcium carbonate;
- and
- (e) between about 5 to 10 weight percent phospholipid anti-wear agent.
A process for preparing a biodegradable lubricant, comprising
- heating a mixture of overbased calcium sulfonate, oil, a linear alkylbenzene sulfonic acid solubilized in low molecular weight alcohol;
- adding 12 hydroxystearic acid and heating further to a maximum temperature 385 to 400° F. (196.1 to 204.4° C.);
- cooling;
- and
- adding additional oil and calcium carbonate while continuing to cool;
- milling the grease;
- adding additional oil to obtain the desired viscosity;
- and when at a temperature less than about 180° F. (82.3° C.) adding a naturally occurring phosphatide extended performance and anti-wear agent.
A method of lubricating in a marine application comprising, using a lubricant composition having a specific gravity at least about 1.0 at 60° F. (15.6° C.).
A method of lubricating in a marine application, comprising using a lubricant composition including the following:
- (a) between about 55 to 90 weight percent biodegradable base oil;
- (b) between about 10 to 35 weight percent overbased calcium sulfonate thickener;
- and
- (c) between about 3 to 5 weight percent 12 hydroxystearic acid;
- (d) between about 1.5 to 3.0 weight percent calcium carbonate;
- and
- (e) between about 5 to 10 weight percent phospholipid anti-wear agent.
Dependencies are inferred from the claim text.