CUTTING LIQUID, ITS MANUFACTURE AND CUTTING METHOD OF INGOT

摘要

PURPOSE: To solve a risk of ignition at the time of making use of nonwater- soluble cutting oil and a problem of air polution by an organinc solvent by following a washing process of a material to be cut and reduce a warp of a sliced product at the time of cutting-off of an ingot such as a large-diameter silicon single crystal. CONSTITUTION: A uniform mixture with a fatty acid amine which is comprised by making organic and /or inorganic bentonite, water, an alkanolamine and a higher fatty acid react on each other is taken as a main component and the main component is made into a water-soluble cutting liquid by adding an auxiliary agent such as a water retention improver, a lowering agent of a friction coefficient, the auxiliary agent of rust preventive capacity, washing property improving auxiliary agent and a defoaming agent.