Epoxy resin is widely used in fields such as electronic potting, composite materials, and coating adhesion, but it easily entrains air during production to form bubbles. These bubbles not only affect the appearance of the product, but also form points of stress concentration, reducing its mechanical strength, electrical insulation performance, and durability, leading to a lower product qualification rate and rising production costs.
Common defoaming solutions on the market often suffer from poor compatibility, weak durability, or adverse effects on resin transparency and curing performance, and cannot meet the stringent quality requirements of high-end applications. To address this core pain point, the Chemi Tech R&D team has launched a series of high-performance defoamers dedicated to epoxy resin.
Our solution is based on in-depth research into the resin system and the mechanism by which bubbles are generated. First, through a compounding technology of carefully selected modified polysiloxanes and special non-ionic surfactants, we ensure that the defoamer has excellent compatibility with epoxy resin and various curing agents, avoiding defects such as shrinkage cavities or fish eyes. Second, the product has extremely low surface tension, so it can rapidly penetrate the bubble film wall and cause it to rupture, while suppressing foam regeneration, maintaining stable efficacy throughout the entire process of resin mixing, vacuum degassing, and filling and curing.
The specific application steps are clear and simple: First, add the Chemi Tech defoamer at a dosage of 0.1%-0.5% to the epoxy resin main agent or the curing agent component; second, it is recommended to add it simultaneously during the regular stirring process to ensure uniform dispersion; third, it can be combined with a subsequent vacuum degassing process to further eliminate trace residual bubbles and obtain a dense, flawless final product.
We once helped a precision electronic component manufacturer located in East China solve the problem of micro-bubbles inside its potting compound. The customer's original product showed fluctuations in electrical performance after high-temperature aging. After adopting our customized defoaming solution, the bubble rate of the potting compound was significantly reduced, and after curing, the interior was uniform and dense. Testing showed that the long-term reliability of its components was improved by about 30%, earning high recognition from the customer.
Choosing Chemi Tech means choosing deep control over quality. We not only provide products, but also provide technical support and problem diagnosis throughout the production process, helping you thoroughly overcome the epoxy resin defoaming challenge and achieve a comprehensive improvement in product value.