Phenolic foam and method of manufacture thereof

A phenolic foam formed from a foamable phenolic resin composition, and a blowing agent,

• the phenolic foam comprising 1 to 5% by weight of red phosphorus based on the weight of the phenolic foam, the phenolic foam has a density of from 10 kg/m3 to 100 kg/m3, a closed cell content of at least 85% as determined in accordance with ASTM D6226 and the foam has a FIGRA0.2 MJ of 120 W/s or less, when measured according to EN13823 and a thermal conductivity of 0.023 W/m.K or less, at 10° C., in accordance with EN 13166:2012.

A phenolic foam formed by foaming and curing a phenolic resin foamable composition comprising a phenolic resin, a surfactant, an acid catalyst, a blowing agent, and 1 to 5% by weight of red phosphorus based on the weight of the phenolic foam, the phenolic foam has a density of from 10 kg/m3 to 100 kg/m3, a closed cell content of at least 85% as determined in accordance with ASTM D6226 and the foam has a FIGRA0.2 MJ of 120 W/s or less (such as 110 W/s or less, or 100 W/s or less, or 95 W/s or less, or 90 W/s or less, or 85 W/s or less) when measured according to EN13823 and the phenolic foam has a thermal conductivity of 0.023 W/m.K or less, at 10° C., in accordance with EN 13166:2012.