AQUEOUS COMPOSITION, AQUEOUS CUTTING FLUID USING THE SAME, METHOD FOR PREPARATION THEREOF, AND CUTTING METHOD USING THE CUTTING FLUID

摘要

Provided is an aqueous cutting liquid, which suppresses impacts on not only a local working environment but the global environment, and in which high dispersibility of abrasive grains and prevention of precipitate from being formed as a hard cake are compatible.;Abrasive grains G are dispersed in an aqueous composition comprising a dispersion medium M in which colloidal particles P of silicic acid are dispersed in a stable manner, the dispersion medium M being composed of a hydrophilic polyhydric alcohol compound such as ethylene glycol or the like, a lipophilic polyhydric alcohol compound such as propylene glycol or the like and water. The dispersion medium is free of smell and noninflammable. Since abrasive grains are not put into direct, close contact to each other in sedimentation over time, precipitate is not formed as a hard cake and thereby abrasive grains are again dispersed for second use. Since the aqueous cutting liquid is of low viscosity in an intrinsic sense, increases in viscosity by mixing of water or cutting chips into the cutting liquid are mild and therefore, a long lifetime of the cutting liquid is secured. Water cleaning of a work can be conducted. Since the dispersion medium is a biodegradable organic compound with a low molecular weight, a waste of the dispersion medium is treatable by activated sludge.