Gemini organic silicon defoamer

Abstract

The invention relates to a gemini organic silicon defoamer. The gemini organic silicon defoamer is of an improved polyether organosilicon diamide sulfonate structure; hydrophilic groups are ethylene oxide, an amido bond and sulfonate; hydrophobic groups are polysiloxane and epoxypropane; through a plurality of hydrophilic groups, the low-temperature defoaming affect is good; through a comb structure, polyether-modified silicone oil can quickly spread on a gas-liquid interface of a foaming system, and locally intrudes to break foam, and the gemini organic silicon defoamer has better defoaming activity; through a macromolecular comb structure, the dissolution rate in a system is reduced and a continuous foam inhibition effect is generated. The gemini organic silicon defoamer is a silicone-modified defoamer which is good in defoaming and foam inhibiting properties, especially good in low-temperature defoaming and foam inhibiting effects.

Description

technical field

[0001] The invention relates to a gemini type organic silicon defoamer and a preparation method thereof. Background technique

[0002] Defoamer, also known as antifoaming agent, will produce many harmful foams in the process of industrial production, and it is necessary to add a defoamer. The hazards caused by these foams mainly include: production capacity is greatly restricted, waste of raw materials and products is caused, the reaction cycle is prolonged, product quality is affected, it is not conducive to accurate measurement, environmental pollution, and accidents are caused. In short, the existence of bubbles affects all sectors and aspects of the national economy. If they cannot be resolved properly, it is no exaggeration to say that "bubbles" will become our roadblock and become a "bottleneck" in certain processes.

[0003] Although the current papermaking technology is constantly improving and the water temperature of white water is also on the rise...

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