Migration of air release in lubricant base stocks

摘要

A method of improving air release in lubricant base stocks and lubricating oils is provided. The method includes providing a Group I base stock, a Group II base stock or a combination thereof and adding to the base stock an effective amount of C7 to C80 paraffin, wherein the lubricant base stock provides air release according to the ASTM D3427 test at least 20% lower than the same lubricant base stock not including the C7 to C80 paraffin. Also provided are lube base stocks and lubricating oils with improved air release and methods of making such base stocks and oils.

主权项

1. A method of mitigating air release in lubricant base stocks comprising:
providing a Group I base stock, a Group II base stock or a combination thereof which are substantially free of additives, and adding to the base stock an effective amount of a C6 to C80 paraffin, wherein the lubricant base stock provides air release according to the ASTM D3427 test of at least 20% lower than the same base stock not including the C6 to C80 paraffin, wherein no other additives are added to the base stock prior to or during the step of adding the C6 to C80 paraffin to the base stock, wherein the effective amount of the C6 to C80 paraffin ranges from 0.02 to 8 wt %, and wherein the C6 to C80 paraffin is chosen from the group consisting of n-hexane, n-heptane, n-dodecane, nonadecane, n-hexadecane, and cyclohexane.