A multi-phase emulsion defoamer and a method for preparing the same

CN122273153APending Publication Date: 2026-06-26HUBEI LONGSHENG SIHAI NEW MATERIALS CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: HUBEI LONGSHENG SIHAI NEW MATERIALS CO LTD
Filing Date: 2026-05-13
Publication Date: 2026-06-26

AI Technical Summary

Technical Problem

Existing single-phase silicone emulsion defoamers are prone to Ostwald ripening in high-concentration surfactant systems, leading to demulsification, stratification, and loss of defoaming ability.

Method used

A multiphase emulsion defoamer preparation method is adopted, in which a primary emulsion is prepared at high temperature and then added dropwise to the remaining oil phase at low temperature to construct an O/A/O multiphase emulsion microstructure. The external oil phase forms a spatial isolation barrier to isolate the internal small-diameter defoaming droplets from the external high-concentration surfactant environment. Combined with powdered metal-organic framework materials, the dispersion stability is improved.

Benefits of technology

It effectively prevents the increase of emulsion particle size, maintains the stability of the defoamer in a high-concentration surfactant environment, ensures that the defoamer does not break emulsion or separate into layers, and does not precipitate silica gel in a high-temperature environment, thus achieving a continuous defoaming effect.

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Abstract

This application relates to a multiphase emulsion defoamer and its preparation method, belonging to the field of defoamer technology. The multiphase emulsion defoamer comprises an organosilicon active ingredient, a polyether-modified organosiloxane, an emulsifier, a thickener, and water. The preparation method includes the following steps: S1, mixing the organosilicon active ingredient, the polyether-modified organosiloxane, the emulsifier, and the thickener in a first proportion, stirring under a first temperature condition, and emulsifying to obtain a primary oil-in-water emulsion; S2, under a second temperature condition, adding the primary emulsion dropwise to the organosilicon active ingredient in a second proportion, stirring and cooling to room temperature after the addition is complete to obtain the multiphase emulsion defoamer; wherein, the sum of the first proportion and the second proportion is 100%, and the first temperature is higher than the second temperature. This application overcomes the ripening defect of single-phase emulsions, ensuring that the defoamer does not break emulsion or separate into layers in harsh systems, and that no silica gel precipitates under high-temperature environments.

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