Controlled release of additives in gas turbine lubricating compositions

Abstract

A gas turbine lubricating composition comprises a first lubricating composition and a delivery system for delivering at least one additive to said first lubricating composition in a controlled, time-release manner, thereby converting said first lubricating composition to a second lubricating composition, different from said first lubricating composition. In one embodiment, the delivery system comprises a controlled release gel. A method of lubricating a gas turbine using such lubricating composition is also disclosed.

1 . A gas turbine lubricant composition comprising a first lubricating composition and a delivery system for delivering at least one additive to said first lubricating composition in a controlled, time-release manner, thereby converting said first lubricating composition to a second lubricating composition, wherein said second lubricating composition is different from said first lubricating composition. 
   
   
       2 . The gas turbine lubricant composition of  claim 1 , wherein said delivery system comprises a gel. 
   
   
       3 . The gas turbine lubricant composition of  claim 2 , wherein said gel comprises:
 (a) at least two additives selected from the group of detergents, dispersants, acids, bases, over based detergent, succinated polyolefins or mixtures thereof, wherein the selected additives when combined form a gel; and   (b) optionally at least one additive selected from the group of viscosity modifiers, friction modifiers, detergents, cloud point depressants, pour point depressants, demulsifiers, flow improvers, anti static agents, dispersants, antioxidants, sludge reducing agents, varnish reducing agents, antifoams, corrosion/rust inhibitors, extreme pressure/antiwear agents, seal swell agents, lubricity aids, antimisting agents, or mixtures thereof.   
   
   
       4 . The gas turbine lubricant composition of  claim 3 , wherein the gel comprises a combination of an overbased detergent and an ashless succinimide dispersant. 
   
   
       5 . The gas turbine lubricant composition of  claim 4 , wherein the ratio of detergent to dispersant is within the range of 10:1 to 1:10. 
   
   
       6 . The gas turbine lubricant composition of  claim 3 , wherein the gel comprises at least one additive selected from the group of viscosity modifiers, friction modifiers, detergents, cloud point depressants, pour point depressants, demulsifiers, flow improvers, anti static agents, dispersants, antioxidants, antifoams, corrosion/rust inhibitors, extreme pressure/antiwear agents, seal swell agents, lubricity aids, antimisting agents, or mixtures thereof. 
   
   
       7 . The gas turbine lubricant composition of  claim 6 , wherein the components in the gel dissolve in the first lubricating composition at different rates. 
   
   
       8 . A method comprising the step of lubricating a gas turbine with a lubricating composition, said lubricating composition comprising a first lubricating composition and a delivery system for delivering at least one additive to said first lubricating composition in a controlled, time-release manner, thereby converting said first lubricating composition to a second lubricating composition, wherein said second lubricating composition is different from said first lubricating composition. 
   
   
       9 . The method of  claim 8 , wherein said delivery system comprises a gel. 
   
   
       10 . The method of  claim 9 , wherein said gel comprises:
 (a) at least two additives selected from the group of detergents, dispersants, acids, bases, over based detergent, succinated polyolefins or mixtures thereof, wherein the selected additives when combined form a gel; and   (b) optionally at least one additive selected from the group of viscosity modifiers, friction modifiers, detergents, cloud point depressants, pour point depressants, demulsifiers, flow improvers, anti static agents, dispersants, antioxidants, antifoams, corrosion/rust inhibitors, extreme pressure/antiwear agents, seal swell agents, lubricity aids, antimisting agents, or mixtures thereof.   
   
   
       11 . The method of  claim 10 , wherein the gel comprises a combination of a overbased detergent and an ashless succinimide dispersant. 
   
   
       12 . The method of  claim 11 , wherein the ratio of detergent to dispersant is within the range of 10:1 to 1:10. 
   
   
       13 . The method of  claim 10 , wherein the gel comprises at least one additive selected from the group of viscosity modifiers, friction modifiers, detergents, cloud point depressants, pour point depressants, demulsifiers, flow improvers, anti static agents, dispersants, antioxidants, antifoams, corrosion/rust inhibitors, extreme pressure/antiwear agents, seal swell agents, lubricity aids, antimisting agents, or mixtures thereof. 
   
   
       14 . The method of  claim 13 , wherein the components in the gel dissolve in the first lubricating composition at different rates. 
   
   
       15 . A gas turbine lubricated with the lubricant composition of  claim 1 .