초록 ▼

A bactericide is added to conventional water-soluble cutting fluids to suppress deterioration by microorganisms. Such fluids are however accompanied by the drawbacks that the bactericide has a narrow antibacterial spectrum and moreover its effects last a short time. It is the object of the present i

A bactericide is added to conventional water-soluble cutting fluids to suppress deterioration by microorganisms. Such fluids are however accompanied by the drawbacks that the bactericide has a narrow antibacterial spectrum and moreover its effects last a short time. It is the object of the present invention to offers water-soluble cutting fluids which remain resistant to a wide variety of microorganisms for a long time. The present invention therefore offers water-soluble cutting fluids to which has been added a specific amine selected from amines known to date.

대표청구항 ▼

In an antimicrobial water-soluble cutting fluid comprising a mineral oil and/or fatty oil, an extreme-pressure additive and a surfactant, the improvement wherein said fluid further comprises an amine or amine derivative represented by the following formula (I): [Figure] (I) or by the following (II):

In an antimicrobial water-soluble cutting fluid comprising a mineral oil and/or fatty oil, an extreme-pressure additive and a surfactant, the improvement wherein said fluid further comprises an amine or amine derivative represented by the following formula (I): [Figure] (I) or by the following (II): [Figure] (II) wherein R1 through R7 individually mean a hydrogen atom, a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, alkylaryl, aralkyl, aryl, hydroxyalkyl or alkoxyl group, or a nitrogen-containing heterocyclic group having up to 10 carbon atoms, R1 and R2 may be coupled together into a nitrogen-containing heterocyclic group along with the nitrogen atom to which R1 and R2 are bonded, or R3 through R7 individually mean a hydroxyl, amino, substituted amino, aminocarbonyl or aliphatic acyl group, and R8 denotes an alkylene group having 1-4 carbon atoms.