| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject oil solution capable of exhibiting excellent lubricating property, rust-proofing property, defoaming property and antimicrobial property and useful for metal working, e.g. cutting and grinding processing. SOLUTION: This oil solution comprises an esterified product obtained by reacting (A) a 4-12C aliphatic carboxylic acid [preferably an (un)saturated (branched)aliphatic monocarboxylic acid] with (B) an alkanolamine (specifically an alkanolamine having one to three 1-4C aliphatic group having one or more OH), usually in an amount of about 5-80wt.%. The esterified product is obtained by subjecting, e.g. hydrochloride, sulfate, etc., of the component B to dehydration reaction with the component A by using an acidic catalyst or an alkali catalyst at 100-250 deg.C or by similarly carrying out dehydration reaction in inert gas without using any solvent. |
