Patent ID: 6235687
Filing Date: 2001-05-22
Classification: C10M

Abstract:
A method for producing lubricating oils possessing anti-rust properties containing acidic anti-rust additives and acid scavengers by adding the acid scavengers to the lubricating oil before the acidic anti-rust additive is added to the lubricating oil and insuring that the resulting mixture of lubricating oil, acid scavenger and acidic anti-rust additive is not subjected to direct heating, wherein the acid scavenger is selected from the group consisting of carbodiimides, glycidyl ethers, epoxides, alkanolamines, alkoxylated tertiaryamines, arylamines, and N,N,N',N' tetraalkyl 1,8 naphthylene diamine and wherein when carbodiimide is used as the acid scavenger the amount of carbodiimide employed is in the range of about 0.01 to 5 wt %, and wherein when epoxides or glycidyl ethers is used as the acid scavenger the amount of epoxides or glycidyl ethers employed is in the range of about 0.1 to 25 wt %, and wherein the amount of acidic anti-rust additive used is in the range of about 0.01 to 2 wt %.