How do isothalic resins differ from orthothalic resins?

Isothalic resins are specifically formulated to provide superior chemical resistance compared to orthothalic resins. This enhancement is largely due to the molecular structure of isothalic acid, which allows for a more robust chemical cross-linking. As a result, isothalic resins are suitable for applications requiring exposure to aggressive chemicals, making them ideal for marine environments or in situations where enhanced durability against chemical exposure is necessary.

In contrast, orthothalic resins, while effective and more commonly used, generally do not exhibit the same level of resistance to chemical agents. Therefore, isothalic resins are often chosen over orthothalic resins when chemical resistance is a critical factor in the performance of the material.