Applications of Epoxy Resin Defoamers

I. Why Does Epoxy Resin Foam?

There are many reasons, which can be analyzed based on specific circumstances. Firstly, air often gets mixed into epoxy resin during stirring, pouring, flowing, and filtering. Secondly, due to the requirements of the production process, epoxy resin requires water as a diluent, but a certain amount of emulsifier is needed during emulsion polymerization. This affects the surface tension of the emulsion system, reducing it and thus producing foam.

II. Composition and Function of Epoxy Resin Defoamer

Composition: Developed and produced by Hongtai based on the foaming characteristics of the epoxy resin industry, the epoxy resin defoamer is mainly composed of a compound of organosilicone and modified silicone polyether, which has a good effect on micro-foam.

Defoaming Effect: The epoxy resin defoamer has a good effect on foam generated by epoxy resin, AB glue, floor paint, and other systems. It has the advantages of low dosage, fast defoaming speed, long foam suppression time, and no oil spots. Adding it to a foaming system will not affect the film-forming properties of the product, nor will it cause problems such as pinholes or fisheyes. 

Optional Products: In addition to epoxy resin defoamers, we can also choose oil-based epoxy resin defoamers. These are self-emulsifying and well-dispersible defoamers that defoam stably in water-soluble polymers and medium- to low-viscosity systems. They do not affect the curing time or appearance of epoxy resins, such as maintaining their original transparency.

Usage and Dosage: Epoxy resin defoamers are simple and easy to use; they can be used directly. The recommended dosage is 0.001-0.1% of the total volume. Oil-based epoxy resin defoamers can be diluted 1:1 with warm water (around 50-60 degrees Celsius) before use. The recommended dosage is approximately 0.002-0.005% of the total volume, depending on the specific situation.