Is novolac epoxy resin or epoxy resin?
The novolac epoxy resin prepared by epoxidation with linear phenolic resin has the high thermal stability and the main reactivity of the epoxy resinTherefore, it can be said that the epoxy resin is modified by epoxy group
General bisphenol A epoxy resin can be cured at normal atmospheric temperature, small volume shrinkage, acid and alkali resistance, but poor thermal stability
Phenolic resin has good thermal stability, but it needs to be heated, pressurized and reacted with by-product water during curing. Therefore, there are some disadvantages such as residual air bubbles, solidification volume shrinkage, and poor alkali resistance
