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We often see different ratios for epoxy resin and curing agents, such as 1:1, 2:1, 3:1, or even 5:1, depending on the application. But how are these ratios determined, and what is the science behind them? To illustrate, let’s take the example of 128 epoxy resin (with an epoxy equivalent weight of 184-190 g/eq) and D230 curing agent (with an amine hydrogen equivalent weight of 61 g/eq). Achieving an ideal balance requires calculating the mix ratio based on these equivalent weights. Assuming an epoxy equivalent weight of 184 g/eq, the mix ratio can be calculated as follows: Curing Agent Amount = (184 g/eq Epoxy) / (61 g/eq Curing Agent) ≈ 3:1 This ratio of approximately 3:1 ensures that each epoxy group in the 128 resin has a corresponding curing agent group to react with, forming a durable and tightly crosslinked structure. If flexibility or impact resistance is needed, the ratio can be adjusted to slightly reduce the curing agent, enhancing the material’s toughness and elongation. Understanding the underlying logic of epoxy-to-curing-agent ratios allows us to tailor formulations to specific performance requirements, achieving ideal material properties. #EpoxyResin #CuringAgents #MaterialScience #128epoxyresin #D230hardener #ChemicalBalance

  • 128 epoxy resin mix with D230 curing agent

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