Non-flammable aerosol multiuse invert emulsion lubricant

Abstract

The present invention provides stable water-in-oil emulsions suitable for use as fire-resistant aerosol multipurpose lubricants. The water-in-oil emulsion comprises a synthetic ester base oil, compatible invert emulsifier, water, and a preservative. The aerosol apparatus employs a larger than standard stem orifice to produce a non-flammable aerosol.

What is claimed is: 
     
         1 . A method of making an invert emulsion lubricating composition, the method comprising:
 (A) adding an ester base oil and a water-in-oil emulsifier into a reaction vessel;   (B) homogenizing the ester base oil and the water-in-oil emulsifier;   (C) adding water into the reaction vessel; and   (D) homogenizing the mixture in the reaction vessel until all the water is emulsified and no residual water is left at the bottom of the reaction vessel,   wherein the invert emulsion lubricating composition comprises the ester base oil at about 25% to 55% by weight, the water-in-oil emulsifier at about 2% to 14% by weight, and water at about 35% to 65% by weight.   
     
     
         2 . The method according to  claim 1 , wherein the water-in-oil emulsifier has a hydrophilic-lipophilic balance (HLB) value of about 1 to 10. 
     
     
         3 . The method according to  claim 2 , wherein the water-in-oil emulsifier has an HLB value of about 3 to 6. 
     
     
         4 . The method according to  claim 1 , wherein the water-in-oil emulsifier is an oligomeric ester emulsifier with a viscosity of about 1000 to 3500 mPa·s measured at 25° C. 
     
     
         5 . The method according to  claim 4 , wherein the water-in-oil emulsifier is an oligomeric ester emulsifier with a viscosity of about 1200 to 1500 mPa·s measured at 25° C. 
     
     
         6 . The method according to  claim 1 , wherein the ester base oil has a viscosity of about 5 to 7 mPa·s at 40 Celsius. 
     
     
         7 . The method according to  claim 1 , wherein the ester base oil is at about 30% to 50% by weight. 
     
     
         8 . The method according to  claim 7 , wherein the ester base oil is at about 35% to 45% by weight. 
     
     
         9 . The method according to  claim 1 , wherein the water-in-oil emulsifier at about 3% to 12% by weight. 
     
     
         10 . The method according to  claim 9 , wherein the water-in-oil emulsifier at about 5% to 10% by weight. 
     
     
         11 . The method according to  claim 1 , wherein water is at about 40% to 60% by weight. 
     
     
         12 . The method according to  claim 11 , wherein water is at about 45% to 55% by weight. 
     
     
         13 . The method according to  claim 1 , wherein the invert emulsion lubricating composition further comprises a preservative at about 0.01 to 1% by weight of the invert emulsion lubricating composition. 
     
     
         14 . The method according to  claim 13 , wherein the preservative comprises bronopol (2-bromo-2-nitro-1,3-propanediol). 
     
     
         15 . The method according to  claim 1 , wherein the invert emulsion lubricating composition is non-flammable. 
     
     
         16 . A method of making an aerosol lubricant, the method comprising:
 delivering a liquid comprising the lubricating composition produced by the method of  claim 1  through a stem with a radius of about 0.015 to 0.030 inch (about 0.038 to 0.076 cm), and   actuating the liquid into the aerosol lubricant.   
     
     
         17 . The method according to  claim 16 , wherein the aerosol lubricating composition has no flame extension and no flashback. 
     
     
         18 . The method according to  claim 16 , wherein the stem has a radius of about 0.020 inch (about 0.051 cm). 
     
     
         19 . The method according to  claim 16 , wherein the liquid further comprises a propellant. 
     
     
         20 . The method according to  claim 19 , wherein the liquid comprises:
 the propellant at about 10% to 20% by weight; and   the lubricating composition at about 80% to 90% by weight.   
     
     
         21 . The method according to  claim 20 , wherein the liquid comprises:
 the propellant at about 13% by weight; and   the lubricating composition at about 87% by weight.   
     
     
         22 . The method according to  claim 19 , wherein the propellant comprises 1,3,3,3-tetrafluoropropene. 
     
     
         23 . A method of using an invert emulsion lubrication, the invert emulsion lubrication comprising:
 an ester base oil at about 25% to 55% by weight;   a water-in-oil emulsifier at about 2% to 14% by weight;   water at about 35% to 65% by weight; and   a preservative.   
     
     
         24 . The method according to  claim 23 , wherein the use is selected from the group consisting of preventing corrosion, providing protection by lubrication, loosening rust and/or corrosion, removing greases, dirt, and oil, and driving out moisture via water displacement. 
     
     
         25 . An aerosol lubrication composition comprising an invert emulsion, the invert emulsion comprising:
 an ester base oil at about 25% to 55% by weight, the ester base oil is an unsaturated mono ester with a viscosity index of higher than about 200;   a water-in-oil emulsifier at about 2% to 14% by weight, the water-in-oil emulsifier is an oligomeric ester emulsifier with a viscosity of about 1200 to 1500 mPa·s measured at 25° C. with an HLB value of about 3 to 6;   water at about 35% to 65% by weight; and   a preservative.   
     
     
         26 . The aerosol lubrication composition according to  claim 25 , wherein the aerosol lubrication composition has no flame extension and no flashback. 
     
     
         27 . The aerosol lubrication composition according to  claim 25 , which is generated by delivering the invert emulsion through a stem with a radius of about 0.015 to 0.030 inch (about 0.038 to 0.076 cm). 
     
     
         28 . The aerosol lubrication composition according to  claim 27 , which is generated by delivering the invert emulsion through a stem with a radius of about 0.020 inch (about 0.051 cm).