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Silicone defoamer function introduction

发布时间：2024-07-04

Defoamers are generally composed of a variety of different functional components, namely, the main anti-foaming agent, auxiliary anti-foaming agent, carrier, emulsifier or expansion agent, stabilizer or compounding agent.

(1) Main anti-foaming agent: The main active component is usually an insoluble particulate material, such as hydrophobic silica, fatty amine, paraffin, etc. treated with silicone oil.

(2) Auxiliary defoamer: It is an active component that plays a regulatory role, improves the surface effect of the main defoamer, and plays a synergistic role in the main defoamer. Such as fatty alcohols, fatty acid esters, etc.

(3) Carrier: the main and auxiliary defoamer support, water is the most convenient and economical carrier

(4) Emulsifier and developing agent: It is to make the active components of the defoamer disperse immediately in the foaming medium, and contact the surface more quickly, thereby improving the expansion efficiency of the defoamer. Commonly used emulsifiers are organic esters and ethyl oxidation products.

(5) Stabilizer and compounding agent: it is an additive to improve the stability and storage time of defoamer. The stabilizer of water-based defoamer is often a kind of preservative to prevent the product from being damaged by bacteria during storage. Oleic acid and hexylene glycol are commonly used as complexing agents.

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