| 摘要 |
PURPOSE:To obtain a water-soluble cutting oil excellent in lubricating properties, dispersion stability, rancidity resistance, rust-preventive properties, etc., by using a salt of a specified alkylthiopropionic acid with an alkanolamine as the essential component. CONSTITUTION:A salt of a carboxylic acid of formula I (wherein R is 6-22C alkyl; and R<2> is H or methyl) with an amine of formula II [wherein X<1> and X<2> are each H, 1-3C alkyl or hydroxylalkyl of the formula: (CH2),-OHz (z) is 1-3; and (y) is 0-2] is produced. The obtained salt as the essential component is mixed with optional additives such as a pH adjuster, an oiliness improver and an extreme-pressure additive to produce the objective oil. Examples of the carboxylic acids include hexylthiopropionic acid and octylthippropionic acid. Examples of the amines include monoethanolamine and diethanolamine. |
