Preparation method of emulsion type polyether-modified silicon antifoaming agent

Abstract

The invention discloses a preparation method of an emulsion type polyether-modified silicon antifoaming agent. The preparation method of the emulsion type polyether-modified silicon antifoaming agentis characterized by comprising the following steps: adding dimethyl-3-hydroxypropyl methyl, polypropylene glycol, vegetable oil, glyceryl monostearate and polyethylene glycol monooleate into a reaction kettle provided with stainless steel stirring paddles, a motor and a heating system, and uniformly mixing the above raw materials at normal temperature; heating the uniformly stirred raw materials with the heating system; and adding a thickening agent for thickening, and carrying out packaging treatment. According to the preparation method of the emulsion type polyether-modified silicon antifoaming agent provided by the invention, the antifoaming agent prepared by using a formula in the invention has good foam inhibition performance, and in particular, the antifoaming agent can effectively reduce the risk of shrinkage cavities in the surface of a water-based paint; and by adding polyethylene glycol monooleate, the antifoaming agent has improved compatibility with other substances in use.

Description

technical field [0001] The invention belongs to the technical field of defoamer preparation, and in particular relates to a preparation method of an emulsion-type polyether-modified silicon defoamer. Background technique [0002] Antifoaming agent, also known as antifoaming agent, is a food additive that reduces surface tension during food processing, inhibits foam generation or eliminates foam that has already occurred. The defoamers approved for use in my country include emulsified silicone oil, high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alcohol amine ether, polyoxypropylene glyceryl ether and polyoxypropylene polyoxygen 7 types including vinyl glyceryl ether and polydimethylsiloxane. [0003] Existing silicone defoamers can maintain a good defoaming effect at room temperature, but the compatibility of silicone defoamers is low when used, which will cause great waste, and silicone ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of emulsion type polyether modified silicon defoamer, to solve the above-mentioned background technology and propose that existing organic silicon defoamer has low compatibility when used, and can't effectively and quickly Reduce the problem of shrinkage cavity on the surface of water-based coatings

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