Calcium carbonate greases

Abstract

A lubricating grease includes calcium carbonate about 25 wt. %-75 wt. % of the lubricating grease, and the calcium carbonate forms a stable particle suspension or a colloidal dispersion in the lubricating grease. The lubricating grease further includes a base oil at a balanced amount.

1 . A lubricating grease, comprising:
 calcium carbonate about 25 wt. %-75 wt. % of the lubricating grease, the calcium carbonate forms a stable particle suspension or a colloidal dispersion in the lubricating grease; and   a base oil at a balanced amount.   
     
     
         2 . The lubricating grease of  claim 1 , further comprises a secondary structural component about 0.1 wt. %-25 wt. % of the lubricating grease and is selected from one or more of: calcium 12-hydroxystearate (e.g., calcium 12-HSA), calcium sulfonate, lithium thickener, lithium complex thickener, calcium complex thickener, polyurea, bentonite clays, aluminum thickener, aluminum complex thickeners. 
     
     
         3 . The lubricating grease of  claim 2 , wherein the secondary structural component consists of calcium sulfonate. 
     
     
         4 . The lubricating grease of  claim 2 , wherein the secondary structure component is about 0.1 wt. %-15 wt. % and consists of calcium 12-HSA. 
     
     
         5 . The lubricating grease of  claim 3 , wherein the secondary structural component consists of calcium sulfonate. 
     
     
         6 . The lubricating grease of  claim 2 , wherein the calcium carbonate is about 25 wt. %-50 wt. %, the secondary structural component is about 2.5 wt. %-7.5 wt. % and consists of calcium-12 HSA. 
     
     
         7 . The lubricating grease of  claim 2 , wherein the calcium carbonate is about 25 wt. %-50 wt. %, the secondary structural component is about 6 wt. %-15 wt. % and consists of calcium sulfonate. 
     
     
         8 . The lubricating grease of  claim 2 , wherein the calcium carbonate is about 25 wt. %-35 wt. % and the secondary component consists of calcium 12-HSA about 1 wt. %-1.5 wt. % and calcium sulfonate about 10 wt. %-15 wt. %. 
     
     
         9 . The lubricating grease of  claim 1 , wherein the calcium carbonate has an average particle size of about 1 μm to 5 μm. 
     
     
         10 . The lubricating grease of  claim 1 , wherein the calcium carbonate has an average particle size of about 3 μm. 
     
     
         11 . The lubricating grease of  claim 1  excludes sulfur-containing additives. 
     
     
         12 . The lubricating grease of  claim 1 , the calcium carbonate is about 75 wt. % and the lubricating grease further comprises a polymer about 0.5 wt. %-2 wt. % of the lubricating grease. 
     
     
         13 . The lubricating grease of  claim 1  has a Kesternich flow pressure of about 450 mbar or higher, tested according to DIN 51805 method at negative 20° C., and the lubricating grease excludes calcium sulfonate or the calcium sulfonate is less than 35 wt. %. 
     
     
         14 . The lubricating grease of  claim 1  has a Kesternich flow pressure of about 850 mbar or higher, tested according to DIN 51805 method at negative 20° C., and the lubricating grease excludes calcium 12-HSA or the calcium 12-HSA is less than 14.5 wt. %. 
     
     
         15 . The lubricating grease of  claim 1  has an adhesion property of less than 40% loss, tested according to ASTM D4049 based on a water temperature of 38° C., a water pressure of 40 psi, and a spray duration of 5 minutes, and the lubricating grease excludes calcium sulfonate or the calcium sulfonate is less than 25 wt. %. 
     
     
         16 . The lubricating grease of  claim 1  has an adhesion property of less than 50% loss, tested according to ASTM D4049 based on a water temperature of 38° C., a water pressure of 40 psi, and a spray duration of 5 minutes, and the lubricating grease excludes calcium 12-HSA or the calcium-12 HSA is less than 8 wt. %. 
     
     
         17 . The lubricating grease of  claim 1  has a pressure protection property of at least 500 kgf, tested according to ASTM D2596 four-ball method, and the lubricating grease excludes calcium sulfonate or the calcium sulfonate is less than 30 wt. %. 
     
     
         18 . The lubricating grease of  claim 1  has a pressure protection property of at least 400 kgf, tested according to ASTM D2596 four-ball method, and the lubricating grease excludes calcium-12 HSA sulfonate or the calcium-12 HSA is less than 12.2 wt. %. 
     
     
         19 . The lubricating grease of  claim 1  has a pressure protection property of at least 500 N pass load, tested according to ASTM D5706 method, and the lubricating grease excludes calcium sulfonate or the calcium sulfonate is less than 20 wt. %. 
     
     
         20 . The lubricating grease of  claim 1  has a pressure protection property of at least 500 N pass load, tested according to ASTM D5706 method, and the lubricating grease excludes calcium-12 HSA sulfonate or the calcium-12 HSA is less than 12.2 wt. %.