What is the usual catalyst ratio for curing resins?

The usual catalyst ratio for curing resins is typically in the range of 1% to 2.5%. This range provides a balanced catalytic action that allows the resin to cure properly without overacceleration, which can lead to defects such as brittleness or poor adhesion. The chosen percentage is effective for most standard applications where resins are used, ensuring optimal performance characteristics for the cured material.

Using a catalyst within this range not only helps in achieving a proper cure but also dries the resin within a reasonable timeframe, which is essential for productivity in both industrial and maintenance settings. Employing a catalyst amount that is either significantly lower or higher than this range can lead to suboptimal curing results, affecting the final properties of the composite being fabricated.