The invention discloses a defoaming agent for cooling liquid of
a diamond wire
cut silicon wafer and a preparation method of the defoaming agent, and the preparation method of the defoaming agent comprises the following steps: S1, sequentially adding
hydrogen-containing
silicone oil and allyl polyether according to a
molar ratio of 1: 1-1: 3, uniformly stirring, adding
chloroplatinic acid as a catalyst, and synthesizing organic
silicon block polyether; s2, uniformly stirring the organic
silicon block polyether obtained in the step S1 and dimethyl
silicone oil to obtain a
mixed solution; s3, uniformly mixing the
mixed solution obtained in the step S2 with
sorbitan monostearate, dropwise adding a hydroxypropyl
methyl cellulose solution into the
mixed solution, slowly and uniformly stirring, adding deionized water, and uniformly stirring to obtain the organic silicon modified polyether defoaming agent. The defoaming agent disclosed by the invention is a micromolecular defoaming agent, has the characteristics of strong universality, strong defoaming power, low volatility, no
toxicity and stability, and has universality.