Phenol formaldehyde resin appears as a dark amber to black rigid thermoset with a glossy surface and distinctive phenolic odor. Key features include outstanding thermal resistance, excellent chemical resistance, good dimensional stability, inherent flame retardancy, and superior electrical insulation properties. Phenol formaldehyde resin is widely used in electrical components, circuit boards, automotive components, adhesives for wood products, and molding compounds.
Alternatives include epoxies and polyimides. Current trends encompass formulations with reduced free phenol and formaldehyde emissions while exploring sustainable bio-based alternatives. Various subtypes exist including novolac types, resol types, and specialty grades incorporating fillers such as glass fiber, mineral fillers, or wood.



