A phenolic foam is a foam obtained by foaming a phenol resin. Compared with the early market-leading polystyrene foam, polyvinyl chloride foam, polyurethane foam and other materials, it has special excellent properties in terms of flame retardancy. It is light in weight, large in rigidity, good in dimensional stability, chemically resistant, heat resistant, flame retardant, self-extinguishing, low smoke, flame-resistant, non-sprinking in case of fire, low in price, electrical, instrument, construction In the petrochemical industry and other industries, the insulation and thermal insulation materials are ideally placed.

At present, phenolic foam has become one of the fastest growing varieties of foam. Consumption continues to grow, applications continue to expand, and research and development at home and abroad are quite active. However, the biggest weakness of phenolic foam is its high brittleness and high open porosity, so increasing its toughness is a key technology to improve the performance of phenolic foam.