Choosing the right defoamer is important for low viscosity acrylic adhesives, and here are a few key factors to consider when choosing a defoamer: DefoamerCompatibility: The defoamer needs to have good compatibility with the acrylic adhesive system, no chemical reaction, and no impact on the product properties such as film-forming and gloss of the coating.
Surface tension: The defoamer should have a low surface tension, which helps it to penetrate quickly into the foam film and break the foam.
Defoaming efficiency: Choose a defoamer with high defoaming power and low dosage to increase efficiency and reduce costs.
Heat resistance: The defoamer should have good heat resistance to withstand the conditions of possible high-temperature applications.
Chemical stability: The defoamer should be chemically inert and will not react with other components in the adhesive to ensure the quality and performance of the product is stable.
Diffusion and permeability: The defoamer should have good diffusion and permeability so that it can be quickly distributed throughout the system and effectively eliminate foam.
No negative effects: The addition of defoamer should not introduce new defects, such as pinholes or fisheye film-forming defects.
In summary, when selecting a defoamer, it is advisable to conduct a small-scale trial to determine the effectiveness of the defoamer and the optimal amount to add. In addition, consult with a professional defoamer** for recommended products for your specific adhesive system. By considering the above factors, it is possible to select a defoamer suitable for low-viscosity acrylic adhesives to ensure the quality and application effect of the adhesive.